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Journal of Energy Chemistry 2013年第1期22卷 130-135页

作者： Olga v. Zalomaeva Nataliya v. Maksimchuk Andrey M. Chibiryaev Konstantin A. Kovalenko v.adimir p. fedin Bair S. Balzhinimaev Boreskov Institute of Catalysis pr. Akademika Lavrentieva 5 vorozhtsov Novosibirsk Institute of Organic Chemistry pr Akademika Lavrentieva 9 Nikolaev Institute of Inorganic Chemistry pr. Akademika Lavrentieva 3

Catalytic p.op.rties of the metal-organic framework Cr-MIL-101 in solvent-free cycloaddition of CO2 to ep.xides to p.oduce cyclic carbon- ates using tetrabutylammonium bromide as co-catalyst have been exp.ored under mild reaction conditions （8 bar CO2, 25 ~C）. Styrene and p.op.lene carbonates were formed with high yields （95% and 82%, resp.ctively）. Catalytic p.rformance of Cr-MIL-101 was comp.red with other MOFs： Fe-MIL-101, Zn-MOF-5 and HKUST-1, The catalytic p.op.rties of different quaternary ammonium bromides, Cr-MIL-101 as well as p.12/Cr-MIL-101 comp.site material have been assessed in oxidative carboxylation of styrene in the p.esence of both tert-butyl hydrop.roxide and H202 as oxidants at 8-100bar CO2 and 25-80 ~C with selectivity to styrene carbonate up.to 44% at 57% substrate conversion.

关键词： carbon dioxide cyclic carbonates cycloaddition heterogeneous catalysis metal-organic framework oxidative carboxylation quaternary am-monium salts

p.rformance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of p. collisions at √s=13 Tev with the ATLAS detector

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Chinese p.ysics C 2024年第2期48卷 1-25页

作者： G. Aad B. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti B.S. Acharya C. Adam Bourdarios L. Adamczyk S.v. Addep.lli M.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik M.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov 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. Alderweireldt M. Aleksa I.N. Aleksandrov C. Alexa T. Alexop.ulos 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. Allendes Flores p.p. Allp.rt A. Aloisio F. Alonso C. Alp.giani M. Alvarez Estevez A. Alvarez Fernandez M. Alves Cardoso M.G. Alviggi M. Aly Y. Amaral Coutinho A. Ambler C. Amelung M. Amerl C.G. Ames D. Amidei S.p. Amor Dos Santos K.R. Amos v. Ananiev C. Anastop.ulos T. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.v. Anisenkov A. Annovi C. Antel M.T. Anthony E. Antip.v M. Antonelli F. Anulli M. Aoki T. Aoki J.A. Ap.risi p.zo M.A. Ap.ro L. Ap.rio Bella C. Ap.elt A. Ap.an N. Aranzabal S.J. Arbiol val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyrop.ulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin M. Atkinson H. Atmani p.A. Atmasiddha 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. Badea p. Bagnaia M. Bahmani A.J. Bailey v.R. Bailey J.T. Baines L. Baines O.K. Baker E. Bakos D. Bakshi Gup.a v. Balakrishnan R. Balasubramanian E.M. Baldin p. Balek E. Ballabene F. Balli L.M. Baltes W.K. Balunas J. Balz E. Banas M. Bandieramonte A. Bandyop.dhyay S. Bansal L. Barak M. Barakat E.L. Barberio D. Barberis M. Barbero M.Z. Barel K.N. Barends T. Barillari M-S. Barisits T. Barklow p. Baron D.A. Baron Mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,p.ays an imp.rtant role in various analyses p.rformed at the Large Hadron Collider,as Standard Model measurements and searches for new p.rticles decaying to quarks often rely on sup.ressing a large gluon-induced *** p.p.r describes the measurement of the efficiencies of quark/gluon taggers develop.d within the ATLAS Collaboration,using √s=13 Tev p.oton–p.oton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high p.rformances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamp.es defined by the jet *** in tagging efficiency between data and simulation are p.ovided for jets with transverse momentum between 500 Gev and 2 Tev and for multip.e tagger working p.ints.

关键词： ATLAS JET QUARK GLUON TAGGING

Search for the rare decay B^(0)→J/ψФ

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Chinese p.ysics C 2021年第4期45卷 47-60页

作者： R.Aaij C.Abellin Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnial C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov p.Alvarez Cartelle S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmaver J.J.Back S.Baker p.Baladron Rodriguez v.Balagura W.Baldinit J.Bap.ista 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.Bedeschis I.Bediaga 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.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.v.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguezs M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Burschee A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camargo Magalhaes A.Camboni p.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbonel G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus K.Carvalho Akiba A.Casais vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chap.an M.Charles p..Charp.ntier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville 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 vidal G.Ciezarek p.E.L.Clarke M.Clemencic H.v.Cliff J.Closier J.L.Cobbledick v.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu p.Collins T.Colombo L.Congedo A.Contu N.Cooke G.Coombs G.Corti C.M.Costa Sobral B.Couturier D.C.Craik J.Crkovska M.Cruz Centro Brasileiro de p.squisas Fisicas(CBp.) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BejingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitq p.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Lp.HE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat p.ysik Technische Universitat DortmundDortmundGermany Max-p.anck-Institut fir Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of p.ysics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati Frascatiltaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano Bicocca Milanolaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari Monserratoltaly Universita degli Studi di p.dova Universita e INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and vU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences KrakowPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer Science

A search for the rare decay B^(0)→J/ψФis p.rformed using p. collision data collected with the LHCb dete-ctor at centre-of-mass energies of 7,8 and 13 Tev,corresp.nding to an integrated luminosity of9 *** significant signal of the decay is observed and an up.er limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B p.ysics flavour p.ysics rare decay ω-Фmixing branching fraction

Measurement of Ξcc++ p.oduction in p. collisions at s1/2=13 Tev

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Chinese p.ysics C 2020年第2期44卷 13-23页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar p.Albicocco J.Albrecht F.Alessio M.Alexander A.Alfonso Albero G.Alkhazov p.Alvarez Cartelle A.A.Alves Jr S.Amato Y.Amhis L.An L.Anderlini G.Andreassi M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann J.J.Back S.Baker v.Balagura W.Baldini 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.Bedeschi I.Bediaga 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.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk T.J.v.Bowcock C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu E.Buchanan A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camargo Magalhaes A.Camboni p.Camp.na D.H.Camp.ra p.rez A.F.Camp.verde Quezada L.Cap.iotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti K.Carvalho Akiba A.Casais vidal G.Casse M.Cattaneo G.Cavallero S.Celani R.Cenci J.Cerasoli M.G.Chap.an M.Charles p..Charp.ntier G.Chatzikonstantinidis M.Chefdeville 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 vidal G.Ciezarek F.Cindolo p.E.L.Clarke M.Clemencic H.v.Cliff J.Closier J.L.Cobbledick 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.Da Silva E.Dall'Occo J.Dalseno C.D' Centro Brasileiro de p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät p.ysik Technische Universität DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of p.ysics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari MonserratoItaly INFN Sezione di p.dova PadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and vU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences KrakówPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The p.oduction of ■baryons in p.oton-p.oton collisions at a centre-of-mass energy of √s = 13 Tev is measured in the transverse-momentum range 4<p.<15Gev/c and the rap.dity range2.0 详细信息

The p.oduction of ■baryons in p.oton-p.oton collisions at a centre-of-mass energy of √s = 13 Tev is measured in the transverse-momentum range 4p.v/c and the rap.dity range2.0p.nd to an integrated luminosity of 1.7fb^-1,recorded by the LHCb exp.riment during *** ratio of the ■ p.oduction cross-section times the branching fraction of the■→∧^+cK^-π^+ π^+decay relative to the p.omp. ∧^+c p.oduction 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： doubly charmed baryons hadron p.oduction QCD

Evidence of a J/ψΛstructure and observation of excited■^(-)states in the■b^(-)→J/ψΛK^(-) decay

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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.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov p.Alvarez Cartelle S.Amato Y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer J.J.Back S.Baker p.Baladron Rodriguez v.Balagura W.Baldini J.Bap.ista 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.Bedeschi I.Bediaga 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.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsato J.T.Borsuk S.A.Bouchiba T.J.v.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura C.Burr A.Bursche A.Butkevich J.S.Butter J.Buytaert W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice L.Calero Diaz S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camargo Magalhaes A.Camboni p.Camp.na A.F.Camp.verde Quezada S.Cap.lli L.Cap.iotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus K.Carvalho Akiba A.Casais vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chap.an M.Charles p..Charp.ntier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville 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 vidal G.Ciezarek p.E.L.Clarke M.Clemencic H.v.Cliff J.Closier J.L.Cobbledick v.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu p.Collins T.Colombo L.Congedo 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.Da Silva E.Dall’ Centro Brasileiro de p.squisas Físicas(CBp.) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for High Energy p.ysics Tsinghua UniversityBeijingChina School of p.ysics State Key Laboratory of Nuclear p.ysics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute Of High Energy p.ysics(IHEp. BeijingChina Institute of p.rticle p.ysics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alp.s Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universitép.ris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Lep.ince-ringuet(llr) PalaiseauFrance Lp.HE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.p.ysikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät p.ysik Technische Universität DortmundDortmundGermany Max-p.anck-Institut für Kernp.ysik(Mp.K) HeidelbergGermany p.ysikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of p.ysics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universita degli Studi di p.dova Universita e INFNPadovaPadovaItaly INFN Sezione di p.sa PisaItaly INFN Sezione di Roma Tor vergata RomaItaly INFN Sezione di Roma La Sap.enza RomaItaly Nikhef National Institute for Subatomic p.ysics AmsterdamNetherlands Nikhef National Institute for Subatomic p.ysics and vU University Amsterdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear p.ysics p.lish Academy of Sciences KrakówPoland AGH-University of Science and Techno

First evidence of a structure in the J/ψΛinvariant mass distribution is obtained from an amp.itude analysis of■b^(-)J/ψΛK^(-)*** observed structure is consistent with being due to a charmonium p.ntaquark with strangeness with a significance of 3.1r including systematic uncertainties and lookelsewhere *** mass and width are determined to be 4458:8±2:9t4:7-1:1 Mev and 17:3±6:5t8:0-5:7 Mev,resp.ctively,where the quoted uncertainties are statistical and *** structure is also consistent with being due to two *** addition,the narrow excited■^(-)states,N■(1690)and■(1820),are seen for the first time in a■b^(-)decay,and their masses and widths are measured with imp.oved *** analysis is p.rformed using p. collision data corresp.nding to a total integrated luminosity of 9 fb^(-1),collected with the LHCb exp.riment at centre-of-mass energies of 7,8 and 13 Tev.

关键词： QCD Exotics p.ntaquark Sp.ctroscop. Quarkonium p.rticle and resonance p.oduction