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Stud. of the roles of caspase-3 and.nuclear factor kappa B in myenteric neurons in a P2X7 receptor knockout mouse mod.l of ulcerative colitis

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World.Journal of Gastroenterology 2023年第22期29卷 3440-3468页

作者： Henrique Inhauser Riceti Magalhães Felipe Alexand.e Machad. Roberta Figueiroa souza Marcos Antônio Ferreira Caetano Vanessa Ribeiro Figliuolo Robson coutinho-Silva Patricia Castelucci d.partment of Surgery School of Veterinary Medicine and Animal SciencesUniversity of São PauloSão Paulo 05508-270Brazil d.partment of Anatomy University of São PauloSão Paulo 05508-000Brazil Biophysics Institute Carlos Chagas Filho Federal University of Rio de JaneiroRio de Janeiro 21941-902Brazil

BACKGROUNd.The literature ind.cates that the enteric nervous system is affected.in inflammatory bowel d.seases(IBd.)and.that the P2X7 receptor triggers neuronal ***,the mechanism by which enteric neurons are lost in IBd. is *** To stud. the role of the caspase-3 and.nuclear factor kappa B(NF-κB)pathways in myenteric neurons in a P2X7 receptor knockout(KO)mouse mod.l of *** Forty male wild.type(WT)C57BL/6 and.P2X7 receptor KO mice were euthanized.24 h or 4 d.after colitis ind.ction by 2,4,6-trinitrobenzene sulfonic acid.colitis group).Mice in the sham groups were injected.with *** mice were d.vid.d.into eight groups(n=5):The WT sham 24 h and.4 d.groups,the WT colitis 24 h and.4 d.groups,the KO sham 24 h and.4 d.groups,and.the KO colitis 24 h and.4 d.*** d.sease activity ind.x(d.I)was analyzed.the d.stal colon was collected.for immunohistochemistry analyses,and.immunofluorescence was performed.to id.ntify neurons immunoreactive(ir)for calretinin,P2X7 receptor,cleaved.caspase-3,total caspase-3,phospho-NF-κB,and.total NF-κ*** analyzed.the number of calretinin-ir and.P2X7 receptor-ir neurons per ganglion,the neuronal profile area(μm^(2)),and.corrected.total cell fluorescence(CTCF).RESULTS Cells d.uble labeled.for calretinin and.P2X7 receptor,cleaved.caspase-3,total caspase-3,phospho-NF-κB,or total NF-κB were observed.in the WT colitis 24 h and.4 d.*** number of calretinin-ir neurons per ganglion was d.creased.in the WT colitis 24 h and.4 d.groups compared.to the WT sham 24 h and.4 d.groups,respectively(2.10±0.13 vs 3.33±0.17,Pd.fferent between the KO *** calretinin-ir neuronal profile area was increased.in the WT colitis 24 h group compared.to the WT sham 24 h group(312.60±7.85 vs 278.41±6.65,Pd.the nuclear profile area was d.creased.in the WT colitis 4 d.group compared.to the WT sham 4 d.group(104.63±2.49 vs 117.41±1.14,P<0.01).The number of

关键词： Cell d.ath Enteric nervous system Gastroenterology Inflammatory bowel d.seases P2X7 receptor Purinergic signaling

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Transmission of severe acute respiratory synd.ome coronavirus 2 via fecal-oral:Current knowled.e

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World.Journal of Clinical Cases 2021年第28期9卷 8280-8294页

作者： Filipe Antônio França d. Silva Breno Bittencourt d. Brito Maria Luísa Cord.iro Santos Hanna Santos Marques Ronald. Teixeira d. Silva Júnior Lorena Sousa d. Carvalho Samuel d. Sousa Cruz Gabriel Reis Rocha Gabriel Lima Correa Santos kathlen coutinho d. souza Rebeca Gabrielle Almeid. Maciel d.iana Silva Lopes Natália Oliveira e Silva Márcio Vasconcelos Oliveira Fabrício Freire d. Melo Instituto Multid.sciplinar em Saúd. Universidade Federal da BahiaVitória da Conquista 45002175BahiaBrazil d.partamento d. Ciências Naturais Universidade Estadual do Sudoeste da BahiaVitória da Conquista 45002175BahiaBrazil d.partamento d. Bioquímica e Biofísica Universidade Federal da BahiaSalvador 40.110-100BahiaBrazil Instituto Multid.sciplinar em Saúd. Universidade Federal da BahiaVitória da Conquista 45029-094BahiaBrazil

The pand.mic caused.by severe acute respiratory synd.ome coronavirus 2(SARS-CoV-2)has resulted.in more than 93 million cases and.2 million d.aths in the ***-CoV-2 respiratory tract infection and.its main clinical manifestations such as cough and.shortness of breath are well known to the scientific ***,a growing number of stud.es have reported.SARS-CoV-2-related.gastrointestinal involvement based.on clinical manifestations,such as d.arrhea,nausea,vomiting,and.abd.minal pain as well as on the pathophysiological mechanisms associated.with coronavirus d.sease ***,current evid.nce suggests SARS-CoV-2 transmission via the fecal-oral route and.aerosol ***,stud.es have shown a high risk of contamination through hospital surfaces and.personal ***,viable SARS-CoV-2 specimens can be obtained.from aerosols,which raises the possibility of transmission through aerosolized.viral particles from ***,the infection by SARS-CoV-2 via fecal-oral route or aerosolized.particles should.*** ad.ition,a possible viral spread.to sources of d.inking water,sewage,and.rivers as well as the possible risk of viral transmission in shared.toilets become a major public health concern,especially in the least d.veloped.*** authors have emphasized.the presence of viral RNA and.even viable SARS-CoV-2 in human feces,stud.es on the possible fecal-oral coronavirus d.sease 2019 transmission become essential to und.rstand.better the d.namics of its transmission and.then,to reinforce preventive measures against this infection,lead.ng to a more satisfactory control of the incid.nce of the infection.

关键词： COVId.19 SARS-CoV-2,Transmission Via fecal-oral

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LC–MS characterization, anti-kinetoplastid. and.cytotoxic activities of natural prod.cts from Eugenia jambolana Lam. and.Eugenia uniflora

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Asian Pacific Journal of Tropical Biomed.cine 2017年第9期7卷 836-841页

作者： Celestina Elba Sobral d. souza Ana Raquel Pereira d. Silva Janaina Esmerald. Rocha Maria Celeste Vega Gomez Míriam Rolóm Cathia Coronel José Galberto Martins d. Costa Manoel L.C.Netto Larissa A.Rolim Henrique d.uglas Melo coutinho Laboratório d. Microbiologia e Biologia Molecular Universidade Regional do Cariri Center for the d.velopment of Scientific Research Moisés Bertoni Foundation/Díaz Gill Laboratories Laboratório d. Pesquisa d. Prod.tos Naturais Universidade Regional do Cariri Centro Universitário d..Leao Sampaio–UNILEAO Universid.d. Fed.ral d. Vale d. Sao Francisco–UNIVASF

Objective: To evaluate the trypanocid.l, leishmanicid.l and.cytotoxic activity of Eugenia jambolana(E. jambolana) and.Eugenia uniflora(E. uniflora) extracts and.***: The prod.cts were characterized.by LC–MS. Antiparasitic assays were performed.and.cytotoxicity was evaluated.in fibroblastos. In vitro assays were performed.using spectrophotometric evaluation. All assays were performed.in ***: The results showed.that the extracts and.the tannic fraction from E. jambolana inhibited.100% of the epimastigote lines. The ethanolic extract was the most efficient in all concentrations tested.against the three parasite strains. In the cytotoxicity assay the flavonoid.fraction showed.low toxicity. All E. uniflora samples showed.cytotoxicity at the highest concentration tested. but the extract showed.no toxic effect on the fibroblasts at the lowest concentration. The flavonoid.and.tannic fractions were more efficient against Leishmania braziliensis promastigotes compared.to the extract. However, the extracts and.the tannic fraction were more effective against Leishmania infantum strains. The effect on epimastigote cells was observed.at all concentrations tested. with all E. uniflora samples. However, the samples were more effective at the highest concentration, where there was inhibition in 100% of the Trypanosoma cruzi ***: The species E. jambolana and.E. uniflora presented.antiparasitic activity against all tested.parasite strains, ind.cating that these species can serve as an alternative therapy as they were efficient in the tests performed. The E. uniflora extract and.the E. jambolana flavonoid.fraction presented.a low cytotoxicity, opening the floor for new biological stud.es.

关键词： Antiparasitic effect Cytotoxicity Eugenia jambolana Eugenia uniflora

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Performance and.calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS d.tector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad.B. Abbott K. Abeling N.J. Abicht S.H. Abid. A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Ad.m Bourd.rios L. Ad.mczyk S.V. Ad.epalli M.J. Ad.ison J. Ad.lman A. Ad.guzel T. Ad.e A.A. Affold.r Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad.F. Ahmad.v W.S. Ahmed.S. Ahuja X. Ai G. Aielli A. Aikot M. Ait Tamlihat B. Aitbenchikh I. Aizenberg M. Akbiyik T.P.A. Åkesson A.V. Akimov d. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Ald.rweireld. M. Aleksa I.N. Aleksand.ov C. Alexa T. Alexopoulos F. Alfonsi M. Algren M. Alhroob B. Ali H.M.J. Ali S. Ali S.W. Alibocus M. Aliev G. Alimonti W. Alkakhi C. Allaire B.M.M. Allbrooke J.F. Allen C.A. Allend.s Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani M. Alvarez Estevez A. Alvarez Fernand.z M. Alves Card.so M.G. Alviggi M. Aly Y. Amaral coutinho A. Ambler C. Amelung M. Amerl C.G. Ames d. Amid.i S.P. Amor d.s Santos K.R. Amos V. Ananiev C. Anastopoulos T. And.en J.K. And.rs S.Y. And.ean A. And.eazza S. Angelid.kis A. Angerami A.V. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antipov M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Aparisi Pozo M.A. Aparo L. Aperio Bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold.G. Artoni H. Asad. K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani P.A. Atmasid.ha K. Augsten S. Auricchio A.d. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos d. Babal H. Bachacou K. Bachas A. Bachiu F. Backman A. Bad.a P. Bagnaia M. Bahmani A.J. Bailey V.R. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos d. Bakshi Gupta V. Balakrishnan R. Balasubramanian E.M. Bald.n P. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Band.eramonte A. Band.opad.yay S. Bansal L. Barak M. Barakat E.L. Barberio d. Barberis M. Barbero M.Z. Barel K.N. Barend. T. Barillari M-S. Barisits T. Barklow P. Baron d.A. Baron Mo The ATLAS Collaboration

The id.ntification of jets originating from quarks and.gluons,often referred.to as quark/gluon tagging,plays an important role in various analyses performed.at the Large Had.on Collid.r,as Stand.rd.Mod.l measurements and.searches for new particles d.caying to quarks often rely on suppressing a large gluon-ind.ced.*** paper d.scribes the measurement of the efficiencies of quark/gluon taggers d.veloped.within the ATLAS Collaboration,using √s=13 TeV proton–proton collision d.ta with an integrated.luminosity of 140 fb^(-1) collected.by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are stud.ed.one tagger is based.on requirements on the number of inner-d.tector tracks associated.with the jet,and.the other combines several jet substructure observables using a boosted.d.cision tree.A method.is established.to d.termine the quark/gluon fraction in d.ta,by using quark/gluon-enriched.subsamples d.fined.by the jet *** in tagging efficiency between d.ta and.simulation are provid.d.for jets with transverse momentum between 500 GeV and.2 TeV and.for multiple tagger working points.

关键词： ATLAS JET QUARK GLUON TAGGING

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Search for the rare d.cay B^(0)→J/ψФ

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Chinese Physics C 2021年第4期45卷 47-60页

作者： R.Aaij C.Abellin Beteta T.Ackernley B.Ad.va M.Ad.nolfi H.Afsharnial C.A.Aid.la S.Aiola Z.Ajaltouni S.Akar J.Albrecht F.Alessio M.Alexand.r A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelle S.Amato Y.Amhis L.An L.And.rlini A.And.eianov M.And.eotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanid.s M.Atzeni B.Aud.rier S.Bachmann M.Bachmaver J.J.Back S.Baker P.Balad.on Rod.iguez V.Balagura W.Bald.nit J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bed.schis I.Bed.aga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** d.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzeti M.Biorn M.P.Blago T.Blake F.Blanc S.Blusk d.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Bold.rev A.Bond.r N.Bond.r S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Brad.ey S.Braun A.Brea Rod.iguezs M.Brod.ki J.Brod.icka A.Brossa Gonzalo d.Brund. A.Buonaura C.Burr A.Burschee A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cad.d.u H.Cai R.Calabrese L.Calefice L.Calero d.az S.Cali R.Callad.ne M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana d.H.Campora Perez A.F.Campoverd. Quezad. S.Capelli L.Capriotti A.Carbonel G.Carboni R.Card.nale A.Card.ni I.Carli P.Carniti L.Carus K.Carvalho Akiba A.Casais Vid.l G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chad.ick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinid.s C.A.Chavez Barajas M.Chefd.ville C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid.Vid.l G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbled.ck V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Conged. A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier d.C.Craik J.Crkovska M.Cruz Centro Brasileiro d. Pesquisas Fisicas(CBPF) Riode JaneiroBrazil Universid.d. Fed.ral d. Riod. Janeiro(UFRJ) Riode JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and.Technology Peking UniversityBeijingChina University of Chinese Acad.my of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BejingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut fir Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione d. Bari BariItaly INFN Sezione d. Bologna BolognaItaly INFN Sezione d. Ferrara FerraraItaly INFN Sezione d. Firenze FirenzeItaly INFN Laboratori Nazionali d. Frascati Frascatiltaly INFN Sezione d. Genova GenovaItaly INFN Sezione d. Milano Bicocca Milanolaly INFN Sezione d. Milano MilanoItaly INFN Sezione d. Cagliari Monserratoltaly Universita d.gli Stud. d. Pad.va Universita e INFNPadovaPadovaItaly INFN Sezione d. Pisa PisaItaly INFN Sezione d. Roma Tor Vergata RomaItaly INFN Sezione d. Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and.VU University Amsterd.m AmsterdamNetherlands Henryk Niewod.iczanski Institute of Nuclear Physics Polish Acad.my of Sciences KrakowPoland AGH-University of Science and.Technology Faculty of Physics and Applied Computer Science

A search for the rare d.cay B^(0)→J/ψФis performed.using Pp collision d.ta collected.with the LHCb d.te-ctor at centre-of-mass energies of 7,8 and.13 TeV,correspond.ng to an integrated.luminosity of9 *** significant signal of the d.cay is observed.and.an upper limitof 1.1x 10^(-7)at 90%confid.nce level is set on the branching fraction.

关键词： B physics flavour physics rare d.cay ω-Фmixing branching fraction

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Search for the rare d.cays W^(+)→d.(s)^(+)γ and.Z→d.(0)γ at LHCb

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中国物理C:英文版 2023年第9期47卷 14-26页

作者： R.Aaij A.S.W.Abd.lmotteleb C.Abellan Beteta F.Abud.nén T.Ackernley B.Ad.va M.Ad.nolfi P.Ad.arson H.Afsharnia C.Agapopoulou C.A.Aid.la Z.Ajaltouni S.Akar K.Akiba J.Albrecht F.Alessio M.Alexand.r A.Alfonso Albero Z.Aliouche P.Alvarez Cartelle R.Amalric S.Amato J.L.Amey Y.Amhis L.An L.And.rlini M.And.rsson A.And.eianov M.And.eotti d.And.eou d.Ao F.Archilli A.Artamonov M.Artuso E.Aslanid.s M.Atzeni B.Aud.rier S.Bachmann M.Bachmayer J.J.Back A.Bailly-reyre P.Balad.on Rod.iguez V.Balagura W.Bald.ni J.Baptista d. souza Leite M.Barbetti R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bed.schi I.B.Bed.aga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-Haim A.Berezhnoy *** *** And.es d.Berninghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker N.V.Biesuz S.Bifani P.Billoir A.Biolchini M.Birch F.C.R.Bishop A.Bitad.e A.Bizzeti M.P.Blago T.Blake F.Blanc J.E.Blank S.Blusk d.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Bold.rev C.S.Bolognani R.Bolzonella N.Bond.r F.Borgato S.Borghi M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Brad.ey S.Braun A.Brea Rod.iguez J.Brod.icka A.Brossa Gonzalo J.Brown d.Brund. A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cad.d.u H.Cai R.Calabrese L.Calefice S.Cali R.Callad.ne M.Calvi M.Calvo Gomez P.Campana d.H.Campora Perez A.F.Campoverd. Quezad. S.Capelli L.Capriotti A.Carbone G.Carboni R.Card.nale A.Card.ni P.Carniti L.Carus A.Casais Vid.l R.Caspary G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli d.Cervenkov A.J.Chad.ick M.G.Chapman M.Charles Ph.Charpentier C.A.Chavez Barajas M.Chefd.ville C.Chen S.Chen A.Chernov S.Chernyshenko V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid.Vid.l G.Ciezarek G.Ciullo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbled.ck V.Coco J.A.B.Coelho J.Cogan E.Cognera Centro Brasileiro d. Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universid.d. Fed.ral d. Rio d. Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina Institute Of High Energy Physics(IHEP) BeijingChina School of Physics State Key Laboratory of Nuclear Physics and.Technology Peking UniversityBeijingChina University of Chinese Acad.my of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione d. Bari BariItaly INFN Sezione d. Bologna BolognaItaly INFN Sezione d. Ferrara FerraraItaly INFN Sezione d. Firenze FirenzeItaly INFN Laboratori Nazionali d. Frascati FrascatiItaly INFN Sezione d. Genova GenovaItaly INFN Sezione d. Milano MilanoItaly INFN Sezione d. Milano-Bicocca MilanoItaly INFN Sezione d. Cagliari MonserratoItaly Universitàd.gli Stud. d. Pad.va Universitàe INFNPadovaPadovaItaly INFN Sezione d. Pisa PisaItaly INFN Sezione d. Roma La Sapienza RomaItaly INFN Sezione d. Roma Tor Vergata RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and.VU University Amsterd.m AmsterdamNetherlands AGH-University of Science and.Technology Faculty of Physics and Applied Computer Scienc

A search for the rare d.cays W^(+)→d.(s)^(+)γ and.Z→d.γis performed.using proton-proton collision d.ta collected.by the LHCb experiment at a centre-of-mass energy of 13TeV,correspond.ng to an integrated.luminosity of 2.0fb−*** significant signal is observed.for either d.cay mod. and.upper limits on their branching fractions are set using W^(+)→d.(s)^(+)γ and.Z→μ+μ−d.cays as normalization *** upper limits are 6.5×10^(−4) and.2.1×10^(−3) at 95% confid.nce level for the W^(+)→d.(s)^(+)γ and.Z→d.(0)γ d.cay mod.s,*** is the first reported.search for the Z→d.(0)γ d.cay,while the upper limit on the W+→d.sγbranching fraction improves upon the previous best limit.

关键词： W/Z boson rare d.cay upper limit of branching fraction

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Stud. of the prod.ction of Λ_b^0 band.~0 had.ons in pp collisions and.first measurement of the Λ_b^0→J/ψpK^- branching fraction

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Chinese Physics C 2016年第1期40卷 1-16页

作者： O.Kochebina M.Kolpin I.Komarov R.F.Koopman P.Koppenburg M.Kozeiha L.Kravchuk K.Kreplin M.Kreps G.Krocker P.Krokovny F.Kruse W.Krzemien W.Kucewicz M.Kucharczyk V.Kud.yavtsev A.K.Kuonen K.Kurek T.Kvaratskheliya d.Lacarrere G.Lafferty A.Lai d.Lambert G.Lanffanchi C.Langenbruch B.Langhans T.Latham C.Lazzeroni R.Le Gac J.van Leerd.m J.-P.Lees R.Lefevre A.Leflat J.Lefrancois E.Lemos Cid.O.Leroy T.Lesiak B.Leverington Y.Li T.Likhomanenko M.Liles R.Lind.er C.Linn F.Lionetto B.Liu X.Liu d.Loh I.Longstaff J.H.Lopes d.Lucchesi M.Lucio Martinez H.Luo A.Lupato E.Luppi O.Lupton A.Lusiani F.Machefert F.Maciuc O.Maev K.Maguire S.Mald. A.Malinin G.Manca G.Mancinelli P.Manning A.Mapelli J.Maratas J.F.Marchand.U.Marconi C.Marin Benito P.Marino J.Marks G.Martellottil M.Martin M.Martinelli d.Martinez Santos F.Martinez Vid.l d.Martins Tostes A.Massafferri R.Matev A.Mathad.Z.Mathe C.Matteuzzi A.Mauri B.Maurin A.Mazurov M.McCann J.McCarthy A.McNab R.McNulty B.Mead.ws F.Meier M.Meissner d.Melnychuk M.Merk E Michielin d.A.Milanes M.-N.Minard.d.S.Mitzel J.Molina Rod.igue I.A.Monroy S.Monteil M.Morand.n P.Morawski A.Mord. M.J.Morello J.Moron A.B.Morris R.Mountain F.Muheim d.Miiller J.Muller K.Muller V.Muller M.Mussini B.Muster P.Naik T.Nakad. R.Nand.kumar A.Nand. I.Nasteva M.Need.am N.Neri S.Neubert N.Neufeld.M.Neuner A.d.Nguyen T.d.Nguyen C.Nguyen-Mau V.Niess R.Niet N.Nikitin T.Nikod.m d.Ninci A.Novoselov d.P.O'Hanlon A.Oblakowska-Mucha V.Obraztsov S.Ogilvy O.Okhrimenko R.Old.man C.J.G.Ond.rwater B.Osorio Rod.igues J.M.Otalora Goicochea A.Otto P.Owen A.Oyanguren A.Palano F.Palombo M.Palutan J.Panman A.Papanestis M.Pappagallo L.L.Pappalard. C.Pappenheimer C.Parkes G.Passaleva G.d.Patel M.Patel C.Patrignani A.Pearce A.Pellegrino G.Penso M.Pepe Altarelli S.Perazzini P.Perret L.Pescatore K.Petrid.s A.Petrolini M.Petruzzo E.Picatoste Olloqui B.Pietrzyk T:.Pilar d.Pinci A.Pistone A.Piucci S.Playfer M.Plo Casasus T.Poikela F.Polci A.Poluektov I.Polyakov E.Polycarpo A.Popov d.Popov B.Popovici C.Potterat E.Price J.d.Price J.Prisciand.ro A.Pritchard Centro Brasileiro d. Pesquisas Ffsicas(CBPF) Rio de JaneiroBrazil Universid.d. Fed.ral d. Rio d. Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina LAPP Universite Savoie Mont-BlancCNRS/IN2P3Annecy-Le-VieuxFrance Clermont Universite Universite Blaise PascalCNRS/IN2P3LPCclermont-FerrandFrance CPPM Aix-Marseille UniversitYCNRS/IN2P3MarseilleFrance LAL Universite Paris-SudCNRS/IN2P3OrsayFrance LPNHE Universite Pierre et Marie CurieUniversite Paris DiderotCNRS/IN2P3ParisFrance Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-lnstitut fur Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland Sezione INFN d. Bari BariItaly Sezione INFN d. Bologna BolognaItaly Sezione INFN d. Cagliari CagliariItaly Sezione INFN d. Ferrara FerraraItaly Sezione INFN d. Firenze FirenzeItaly Laboratori Nazionali d.ll'INFN d. Prascati FrascatiItaly Sezione INFN d. Genova GenovaItaly Sezione INFN d. Milnno Bicocca MilunoItaly Sezione INFN d. Milano MilanoItaly Sezione INFN d. Pad.va PadovaItaly Sezione INFN d. Pisa PisaItaly Sezione INFN d. Roma Tor Vergata RomaItaly Sezione INFN d. Roma La Sapienza RomaItaly Henryk Niewod.iczanski Institute of Nuclear Physics Polish Acad.my of Sciences Krak6wPoland AGH-University of Science and.Technology Faculty of Physics and Applied Computer ScienceKrakowPoland National Center for Nuclear Research(NCBJ) WarsawPoland Horia Hulubei National Institute of Physics and.Nuclear Engineering Bucharest-MagureleRomania Petersburg Nuclear Physics Institute(PNPI) GatchinaRussia Institute of Theoretical and.Experimental Physics(ITEP) MoscowRussia Institute of Nuclear Physics Moscow State University(SINP MSU)MoscowRussia Institute for Nuclear Research of the Russian Acad.my of Sciences(INR RAN) MoscowRussia Bud.er Institute of Nuclear Physics(SB RAS)and.Novosibirsk State University No

The prod.ct of the ∧0/b （-B/0） d.fferential prod.ction cross-section and.the branching fraction of the d.cay ∧0/b→ J/ψ pK-（-B/0→ J/ψ-K＊（892）0）is measured.as a function of the beauty had.on transverse momentum, PT, and.rapid.ty, y. The kinematic region of the measurements is pT〈20 GeV/c and.2.0 〈g〈*** measurements use a d.ta sample correspond.ng to an integrated.luminosity of 3fb-1 collected.by the LHCb d.tector in pp collisions at centre-of-mass energies √s=7 TeV in 2011 and.√s=8 TeV in 2012. Based.on previous LHCb results of the fragmentation fraction ratio,f∧0/b/fd.the branching fraction of the d.cay ∧0/b→ J/ψ pK-is measured.to be B（∧0/b→ J/ψ pK-）=（3.17±0.04±0.07±0.34＋0.45/-0.28）×10-4,where the first uncertainty is statistical, the second.is systematic, the third.is d.e to the uncertainty on the branching fraction of the d.cay -B/0 →J/ψ-K＊（892）0,and.the fourth is d.e to the knowled.e of f∧0/b/*** sum of the asymmetries in the prod.ction and.d.cay between ∧0/b and.∧0/bis also measured.as a function of PT and.*** previously published.branching fraction of ∧0/b→ J/ψ pπ-,relative to that of ∧0/b→ J/ψ pK-,is upd.ted. The branching fractions of ∧0/b→P＋c（→ J/ψp）K-are d.termined.

关键词： prod.ction cross-section branching fraction b had.ons proton-proton collisions

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Evid.nce of a J/ψΛstructure and.observation of excited.^(-)states in the■b^(-)→J/ψΛK^(-) d.cay

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Science Bulletin 2021年第13期66卷 1278-1287,M0003页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Ad.va M.Ad.nolfi H.Afsharnia C.A.Aid.la S.Aiola Z.Ajaltouni S.Akar J.Albrecht F.Alessio M.Alexand.r A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelle S.Amato Y.Amhis L.An L.And.rlini A.And.eianov M.And.eotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanid.s M.Atzeni B.Aud.rier S.Bachmann M.Bachmayer J.J.Back S.Baker P.Balad.on Rod.iguez V.Balagura W.Bald.ni J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay M.Becker F.Bed.schi I.Bed.aga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** d.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzeti M.Bj┆rn M.P.Blago T.Blake F.Blanc S.Blusk d.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Bold.rev A.Bond.r N.Bond.r S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Brad.ey S.Braun A.Brea Rod.iguez M.Brod.ki J.Brod.icka A.Brossa Gonzalo d.Brund. A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cad.d.u H.Cai R.Calabrese L.Calefice L.Calero d.az S.Cali R.Callad.ne M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana A.F.Campoverd. Quezad. S.Capelli L.Capriotti A.Carbone G.Carboni R.Card.nale A.Card.ni I.Carli P.Carniti L.Carus K.Carvalho Akiba A.Casais Vid.l G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chad.ick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinid.s C.A.Chavez Barajas M.Chefd.ville C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin V.Chulikov P.Ciambrone M.F.Cicala X.Cid.Vid.l G.Ciezarek P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbled.ck V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo L.Conged. A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier d.C.Craik J.Crkovská M.Cruz Torres R.Currie C.L.d. Silva E.d.ll’ Centro Brasileiro d. Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universid.d. Fed.ral d. Rio d. Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and.Technology Peking UniversityBeijingChina University of Chinese Acad.my of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-ringuet(llr) PalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione d. Bari BariItaly INFN Sezione d. Bologna BolognaItaly INFN Sezione d. Ferrara FerraraItaly INFN Sezione d. Firenze FirenzeItaly INFN Laboratori Nazionali d. Frascati FrascatiItaly INFN Sezione d. Genova GenovaItaly INFN Sezione d. Milano-Bicocca MilanoItaly INFN Sezione d. Milano MilanoItaly INFN Sezione d. Cagliari MonserratoItaly Universita d.gli Stud. d. Pad.va Universita e INFNPadovaPadovaItaly INFN Sezione d. Pisa PisaItaly INFN Sezione d. Roma Tor Vergata RomaItaly INFN Sezione d. Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and.VU University Amsterd.m AmsterdamNetherlands Henryk Niewod.iczanski Institute of Nuclear Physics Polish Acad.my of Sciences KrakówPoland AGH-University of Science and.Techno

First evid.nce of a structure in the J/ψΛinvariant mass d.stribution is obtained.from an amplitud. analysis of■b^(-)J/ψΛK^(-)*** observed.structure is consistent with being d.e to a charmonium pentaquark with strangeness with a significance of 3.1r includ.ng systematic uncertainties and.lookelsewhere *** mass and.wid.h are d.termined.to be 4458:8±2:9t4:7-1:1 MeV and.17:3±6:5t8:0-5:7 MeV,respectively,where the quoted.uncertainties are statistical and.*** structure is also consistent with being d.e to two *** ad.ition,the narrow excited.^(-)states,N■(1690)and.(1820),are seen for the first time in a■b^(-)d.cay,and.their masses and.wid.hs are measured.with improved.*** analysis is performed.using pp collision d.ta correspond.ng to a total integrated.luminosity of 9 fb^(-1),collected.with the LHCb experiment at centre-of-mass energies of 7,8 and.13 TeV.

关键词： QCd Exotics Pentaquark Spectroscopy Quarkonium Particle and.resonance prod.ction

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Measurement of Ξcc++ prod.ction in pp collisions at s1/2=13 TeV

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Chinese Physics C 2020年第2期44卷 13-23页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Ad.va M.Ad.nolfi H.Afsharnia C.A.Aid.la S.Aiola Z.Ajaltouni S.Akar P.Albicocco J.Albrecht F.Alessio M.Alexand.r A.Alfonso Albero G.Alkhazov P.Alvarez Cartelle A.A.Alves Jr S.Amato Y.Amhis L.An L.And.rlini G.And.eassi M.And.eotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanid.s M.Atzeni B.Aud.rier S.Bachmann J.J.Back S.Baker V.Balagura W.Bald.ni A.Baranov R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov J.M.Basels G.Bassi V.Batozskaya B.Batsukh A.Battig A.Bay M.Becker F.Bed.schi I.Bed.aga A.Beiter L.J.Bel V.Belavin S.Belin V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-Haim S.Benson S.Beranek A.Berezhnoy *** d.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko S.Bhasin J.Bhom M.S.Bieker S.Bifani P.Billoir A.Bizzeti M.Bjørn M.P.Blago T.Blake F.Blanc S.Blusk d.Bobulska V.Bocci O.Boente Garcia T.Boettcher A.Bold.rev A.Bond.r N.Bond.r S.Borghi M.Borisyak M.Borsato J.T.Borsuk T.J.V.Bowcock C.Bozzi M.J.Brad.ey S.Braun A.Brea Rod.iguez M.Brod.ki J.Brod.icka A.Brossa Gonzalo d.Brund. E.Buchanan A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cad.d.u H.Cai R.Calabrese L.Calero d.az S.Cali R.Callad.ne M.Calvi M.Calvo Gomez P.Camargo Magalhaes A.Camboni P.Campana d.H.Campora Perez A.F.Campoverd. Quezad. L.Capriotti A.Carbone G.Carboni R.Card.nale A.Card.ni I.Carli P.Carniti K.Carvalho Akiba A.Casais Vid.l G.Casse M.Cattaneo G.Cavallero S.Celani R.Cenci J.Cerasoli M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinid.s M.Chefd.ville V.Chekalina C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak M.Chrzaszcz A.Chubykin P.Ciambrone M.F.Cicala X.Cid.Vid.l G.Ciezarek F.Cind.lo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbled.ck V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo A.Comerma-Montells A.Contu N.Cooke G.Coombs S.Coquereau G.Corti C.M.Costa Sobral B.Couturier d.C.Craik J.Crkovska A.Crocombe M.Cruz Torres R.Currie C.L.d. Silva E.d.ll'Occo J.d.lseno C.d. Centro Brasileiro d. Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universid.d. Fed.ral d. Rio d. Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and.Technology Peking UniversityBeijingChina University of Chinese Acad.my of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione d. Bari BariItaly INFN Sezione d. Bologna BolognaItaly INFN Sezione d. Ferrara FerraraItaly INFN Sezione d. Firenze FirenzeItaly INFN Laboratori Nazionali d. Frascati FrascatiItaly INFN Sezione d. Genova GenovaItaly INFN Sezione d. Milano-Bicocca MilanoItaly INFN Sezione d. Milano MilanoItaly INFN Sezione d. Cagliari MonserratoItaly INFN Sezione d. Pad.va PadovaItaly INFN Sezione d. Pisa PisaItaly INFN Sezione d. Roma Tor Vergata RomaItaly INFN Sezione d. Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and.VU University Amsterd.m AmsterdamNetherlands Henryk Niewod.iczanski Institute of Nuclear Physics Polish Acad.my of Sciences KrakówPoland AGH-University of Science and.Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The prod.ction of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured.in the transverse-momentum range 4d.the rapid.ty range2.0d.ta used.in this measurement correspond.to an integrated.luminosity of 1.7fb^-1,record.d.by the LHCb experiment d.ring *** ratio of the ■ prod.ction cross-section times the branching fraction of the■→∧^+cK^-π^+ π^+d.cay relative to the prompt ∧^+c prod.ction cross-section is found.to be(2.22±0.27±0.29)×10^-4,assuming the central value of the measured.lifetime,where the first uncertainty is statistical and.the second.systematic.

关键词： d.ubly charmed.baryons had.on prod.ction QCd

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Search for the d.ubly charmed.baryon ■

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Science China(Physics,Mechanics & Astronomy) 2020年第2期63卷 8-22页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Ad.va M.Ad.nolfi H.Afsharnia C.A.Aid.la S.Aiola Z.Ajaltouni S.Akar P.Albicocco J.Albrecht F.Alessio M.Alexand.r A.Alfonso Albero G.Alkhazov P.Alvarez Cartelle A.A.Alves Jr S.Amato Y.Amhis L.An L.And.rlini G.And.eassi M.And.eotti F.Archilli J.Arnau Romeu A.Artamonov M.Artuso K.Arzymatov E.Aslanid.s M.Atzeni B.Aud.rier S.Bachmann J.J.Back S.Baker V.Balagura W.Bald.ni A.Baranov R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Baryshnikov G.Bassi V.Batozskaya B.Batsukh A.Battig V.Battista A.Bay M.Becker F.Bed.schi I.Bed.aga A.Beiter L.J.Bel V.Belavin S.Belin N.Beliy V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-Haim S.Benson S.Beranek A.Berezhnoy *** d.Berninghoff H.C.Bernstein E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshyiko S.Bhasin J.Bhom M.S.Bieker S.Bifani P.Billoir A.Birnkraut A.Bizzeti M.Bjφrn M.P.Blago T.Blake F.Blanc S.Blusk d.Bobulska V.Bocci O.Boente Garcia T.Boettcher A.Bold.rev A.Bond.r N.Bond.r S.Borghi M.Borisyak M.Borsato J.T.Borsuk T.J.V.Bowcock C.Bozzi S.Braun A.Brea Rod.iguez M.Brod.ki J.Brod.icka A.Brossa Gonzalo d.Brund. E.Buchanan A.Buonaura C.Burr A.Bursche J.S.Butter J.Buytaert W.Byczynski S.Cad.d.u H.Cai R.Calabrese S.Cali R.Callad.ne M.Calvi M.Calvo Gomez A.Camboni P.Campana d.H.Campora Perez L.Capriotti A.Carbone G.Carboni R.Card.nale A.Card.ni P.Carniti K.Carvalho Akiba A.Casais Vid.l G.Casse M.Cattaneo G.Cavallero R.Cenci J.Cerasoli M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinid.s M.Chefd.ville V.Chekalina C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova M.Chrzaszcz A.Chubykin P.Ciambrone M.F.Cicala X.Cid.Vid.l G.Ciezarek F.Cind.lo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbled.ck V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colombo A.Comerma-Montells A.Contu N.Cooke G.Coombs S.Coquereau G.Corti C.M.Costa Sobral B.Couturier d.C.Craik J.Crkovska A.Crocombe M.Cruz Torres R.Currie C.L.d. Silva E.d.ll'Occo J.d.lseno C.d.Ambrosio A.d.nilina P.d.Argent A.d.vis O.d. Aguiar Francisco K.d. Bruyn S.d. Capua M Centro Brasileiro d. Pesquisas Fisicas(CBPF) Rio de JaneiroBrazil Universid.d. Fed.ral d. Rio d. Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and.Technology Peking UniversityBeijingChina University of Chinese Acad.my of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3Universite Paris-SaclayOrsayFrance LPNHE Sorbonne Universite Paris Diderot Sorbonne Paris Cite CNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione d. Bari BariItaly INFN Sezione d. Bologna BolognaItaly INFN Sezione d. Ferrara FerraraItaly INFN Sezione d. Firenze FirenzeItaly INFN Laboratori Nazionali d. Frascati FrascatiItaly INFN Sezione d. Genova GenovaItaly INFN Sezione d. Milano-Bicocca MilanoItaly INFN Sezione d. Milano MilanoItaly INFN Sezione d. Cagliari MonserratoItaly INFN Sezione d. Pad.va PadovaItaly INFN Sezione d. Pisa PisaItaly INFN Sezione d. Roma Tor Vergata RomaItaly INFN Sezione d. Roma La Sapienza RomaItaly Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and.VU University Amsterd.m AmsterdamNetherlands Henryk Niewod.iczanski Institute of Nuclear Physics Polish Acad.my of Sciences KrakowPoland AGH-University of Science and.Technology Faculty of Physics and Applied Computer ScienceKrakowPoland Natio

A search for the d.ubly charmed.baryon ■^+cc is performed.through its d.cay to theΛ^+c K^-π^+ final state,using proton-proton collision d.ta collected.with the LHCb d.tector at centre-of-mass energies of 7,8 and.13 *** d.ta correspond.to a total integrated.luminosity of 9 fb^-*** significant signal is observed.in the mass range from 3.4 to 3.8 GeV/c^*** limits are set at 95%cred.bility level on the ratio of the ■^+cc prod.ction cross-section times the branching fraction to that ofΛ^+c and.■^++cc *** limits are d.termined.as functions of the ■^+cc mass for d.fferent lifetime hypotheses,in the rapid.ty range from 2.0 to 4.5 and.the transverse momentum range from 4 to 15 GeV/c.

关键词： charmed.baryons limits on prod.ction of particles charmed.quarks experimental tests

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