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Search.for th. rare decay B^(0)→J/ψФ

Ch.nese ph.sics 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.Afsh.rnial C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Albrech. F.Alessio M.Alexander A.Alfonso Albero Z.Aliouch. G.Alkh.zov p.Alvarez Cartelle S.Amato Y.Amh.s L.An L.Anderlini A.Andreianov M.Andreotti F.Arch.lli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bach.ann M.Bach.aver J.J.Back S.Baker p.Baladron Rodriguez V.Balagura W.Baldinit J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov J.M.Basels G.Bassi B.Batsukh.A.Battig A.Bay M.Becker F.Bedesch.s I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-h.im A.Berezh.oy *** D.Berningh.ff h.C.Bernstein C.Bertella E.Berth.let A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezsh.iko S.Bh.sin J.Bh.m L.Bian M.S.Bieker S.Bifani p.Billoir M.Birch.F.C.R.Bish.p A.Bizzeti M.Biorn M.p.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelh.uve O.Boente Garcia T.Boettch.r A.Boldyrev A.Bondar N.Bondar S.Borgh. M.Borisyak M.Borsato J.T.Borsuk S.A.Bouch.ba 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.Bursch.e 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 Magalh.es A.Camboni p.Campana D.h.Campora perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbonel G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus K.Carvalh. Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Ch.dwick M.G.Ch.pman M.Ch.rles ph.Ch.rpentier G.Ch.tzikonstantinidis C.A.Ch.vez Barajas M.Ch.fdeville C.Ch.n S.Ch.n A.Ch.rnov S.-G.Ch.tic V.Ch.banova S.Ch.lak M.Ch.zaszcz A.Ch.bykin V.Ch.likov 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.Coelh. 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 pesquisas Fisicas(CBpF) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of Sciences BeijingChina Institute Of h.gh.Energy ph.sics(Ih.p) BejingChina Institute of particle ph.sics 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 LpNh. Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultat ph.sik Technische Universitat DortmundDortmundGermany Max-planck-Institut fir Kernph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 padova Universita e INFNPadovaPadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands h.nryk Niewodniczanski Institute of Nuclear ph.sics polish.Academy of Sciences KrakowPoland AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer Science

A search.for th. rare decay B^(0)→J/ψФis performed using pp collision data collected with.th. Lh.b dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresponding to an integrated luminosity of9 *** significant signal of th. decay is observed and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on th. branch.ng fraction.

关键词： B ph.sics flavour ph.sics rare decay ω-Фmixing branch.ng fraction

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Search.for th. doubly h.avy baryons Ω^(0)_(bc) and E^(0)_(bc) decaying to Λ^(+)_(c)π^(-) and E^(+)_(c)π^(-)

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Ch.nese ph.sics C 2021年第9期45卷 10-21页

作者： R.Aaij C.Abelian Beteta T.Ackernley B.Adeva M.Adinolfi h.Afsh.mia C.A.Aidala S.Aiola Z.Ajaltouni S.Aka J.Albrech. F.Alessio M.Alexander A.Alfonso Albero Z.Aliouch. G.Alkh.zov p.Alvarez Cartelie S.Amato Y.Amh.s L.An L.Anderlini A.Andreianov M.Andreotti F.Arch.lli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bach.ann M.Bach.ayer J.J.Back p.Baladron Rodriguez V.Balagura W.Baldini J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov J.M.Basels G.Bassi B.Batsukh.A.Battig A.Bay M.Becker F.Bedesch. I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-h.im A.Berezh.oy *** D.Bemingh.ff h.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezsh.iko S.Bh.sin J.Bh.m L.Bian M.S.Bieker S.Bifani p.Billoir M.Birch.F.C.R.Bish.p A.Bitadze A.Bizzeti M.Bjorn M.p.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelh.uve O.Boente Garcia T.Boettch.r A.Boldyrev A.Bondar N.Bondar S.Borgh. M.Borisyak M.Borsato J.T.Borsuk S.A.Bouch.ba 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.Bursch. 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 Magalh.es A.Camboni p.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Camiti L.Carus K.Carvalh. Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Ch.dwick M.G.Ch.pman M.Ch.rles ph.Ch.rpentier G.Ch.tzikonstantinidis C.A.Ch.vez Barajas M.Ch.fdeville C.Ch.n S.Ch.n A.Ch.rnov V.Ch.banova S.Ch.lak M.Ch.zaszcz A.Ch.bykin V.Ch.likov 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.Coelh. 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 Torres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D'Ambrosi Centro Brasileiro de pesquisas Fisicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Institute of h.gh.Energy ph.sics(Ih.p) BeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University ofCh.nese Academy of Sciences BeijingChina Institute of particle ph.sics Central China Normal UniversityWuhanHubeiChina Univ.Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance Universite Clermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universite paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LpNh. Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/FN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultat ph.sik Technische Universitat DortmundDortmundGermany Max-planck-Institut für Kemph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universita degli Studi di padova Universita e INFNPadovaPadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer ScienceKr

Th. first search.for th. doubly h.avyΩ^(0)_(bc)baryon and a search.for th. E^(0)_(bc)baryon are performed using pp collision data collected via th. Lh.b experiment from 2016 to 2018 at a centre-of-mass energy of 13 TeV,corresponding to an integrated luminosity of 5.2 fb^(-1).Th. baryons are reconstructed via th.ir decays to Λ^(+)_(c)π^(-)and E^(+)_(c)π^(-).No significant excess is fbund for invariant masses between 6700 and 7300 MeV/c^(2),in a rapidity range from 2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/*** limits are set on th. ratio of th. Ω^(0)_(bc)and E^(0)_(bc)production cross-section times th. branch.ng fraction to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))relative to th.t of th. Λ^(0)_(b)(E^(0)_(b))baryon,for different lifetime h.poth.ses,at 95%confidence *** upper limits range from 0.5 x 10^(-4)to 2.5 x 10^(-4)for th.Ω^(0)_(bc)→Λ^(+)_(c)π^(-)(E^(0)_(bc)→Λ^(+)_(c)π^(-))decay,and from 1.4x 10^(-3)to 6.9 x 10^(-3)for th.Ω^(0)_(bc)→E^(+)_(c)π^(-)(E^(0)_(bc)→E^(+)_(c)π^(-))decay,depending on th. considered mass and lifetime of th.Ω^(0)_(bc)(E^(0)_(bc))baryon.

关键词： B ph.sics quarkonium spectroscopy h.avy quark production

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Search.for th. doubly ch.rmed baryon ■

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Science Ch.na(ph.sics,Mech.nics & Astronomy) 2020年第2期63卷 8-22页

作者： R.Aaij C.Abellán Beteta T.Ackernley B.Adeva M.Adinolfi h.Afsh.rnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar p.Albicocco J.Albrech. F.Alessio M.Alexander A.Alfonso Albero G.Alkh.zov p.Alvarez Cartelle A.A.Alves Jr S.Amato Y.Amh.s L.An L.Anderlini G.Andreassi M.Andreotti F.Arch.lli J.Arnau Romeu A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bach.ann J.J.Back S.Baker V.Balagura W.Baldini A.Baranov R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov G.Bassi V.Batozskaya B.Batsukh.A.Battig V.Battista A.Bay M.Becker F.Bedesch. I.Bediaga A.Beiter L.J.Bel V.Belavin S.Belin N.Beliy V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-h.im S.Benson S.Beranek A.Berezh.oy *** D.Berningh.ff h.C.Bernstein E.Berth.let A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezsh.iko S.Bh.sin J.Bh.m 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.Boettch.r A.Boldyrev A.Bondar N.Bondar S.Borgh. M.Borisyak M.Borsato J.T.Borsuk T.J.V.Bowcock C.Bozzi S.Braun A.Brea Rodriguez M.Brodski J.Brodzicka A.Brossa Gonzalo D.Brundu E.Buch.nan A.Buonaura C.Burr A.Bursch. J.S.Butter J.Buytaert W.Byczynski S.Cadeddu h.Cai R.Calabrese S.Cali R.Calladine M.Calvi M.Calvo Gomez A.Camboni p.Campana D.h.Campora perez L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini p.Carniti K.Carvalh. Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero R.Cenci J.Cerasoli M.G.Ch.pman M.Ch.rles ph.Ch.rpentier G.Ch.tzikonstantinidis M.Ch.fdeville V.Ch.kalina C.Ch.n S.Ch.n A.Ch.rnov S.-G.Ch.tic V.Ch.banova M.Ch.zaszcz A.Ch.bykin 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.Coelh. 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'Ambrosio A.Danilina p.d'Argent A.Davis O.De Aguiar Francisco K.De Bruyn S.De Capua M Centro Brasileiro de pesquisas Fisicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of Sciences BeijingChina Institute Of h.gh.Energy ph.sics(Ih.p) BeijingChina Institute of particle ph.sics 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 LpNh. Sorbonne Universite Paris Diderot Sorbonne Paris Cite CNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultat ph.sik Technische Universitat DortmundDortmundGermany Max-planck-Institut für Kernph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 padova PadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands h.nryk Niewodniczanski Institute of Nuclear ph.sics polish.Academy of Sciences KrakowPoland AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer ScienceKrakowPoland Natio

A search.for th. doubly ch.rmed baryon ■^+cc is performed th.ough.its decay to th.Λ^+c K^-π^+ final state,using proton-proton collision data collected with.th. Lh.b detector at centre-of-mass energies of 7,8 and 13 *** data correspond to a total integrated luminosity of 9 fb^-*** significant signal is observed in th. mass range from 3.4 to 3.8 GeV/c^*** limits are set at 95%credibility level on th. ratio of th. ■^+cc production cross-section times th. branch.ng fraction to th.t ofΛ^+c and ■^++cc *** limits are determined as functions of th. ■^+cc mass for different lifetime h.poth.ses,in th. rapidity range from 2.0 to 4.5 and th. transverse momentum range from 4 to 15 GeV/c.

关键词： ch.rmed baryons limits on production of particles ch.rmed quarks experimental tests

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Effect of vacuum h.at treatment on microstructure and microh.rdness of cold sprayed Cu-4Cr-2Nb alloy coating

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中国有色金属学会会刊：英文版 2006年第B01期16卷 203-208页

作者：李文亚郭学平 L.dembinski 廖汉林 C.CODDET LERMpS Université de Technologie de Belfort-MontbéliardSite de Sévenans90010 Belfort CedexFrance

Th. effect of vacuum h.at treatment on th. microstructure and microh.rdness of cold-sprayed Cu-4%Cr-2%Nb alloy coating was investigated. Th. h.at treatment was conducted under th. temperatures from 250 ℃ to 950 ℃ with.a step of 100 ℃ for 2 h. It was found th.t a dense th.ck Cu-4Cr-2Nb coating could be formed by cold spraying. After h.at treatment, a Cr2Nb ph.se was uniformly distributed in th. matrix, wh.ch.was transferred from th. gas-atomized feedstock. A little grain growth.of Cr2Nb ph.se was observed accompanying with.th. h.aling-up of th. incomplete interfaces between th. deposited particles at th. elevated temperatures. Th. coating microh.rdness increases a little with.increasing th. temperature to 350 ℃, and th.n decreases with.furth.r increasing temperature up to 950 ℃. Th.s fact can be attributed to th. microstructure evolution during th. h.at treatment.

关键词： Cu-4Cr-2Nb合金涂层冷喷涂真空热处理显微结构显微硬度

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Measurement of Ξcc++ production in pp collisions at s1/2=13 TeV

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Ch.nese ph.sics 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.Afsh.rnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar p.Albicocco J.Albrech. F.Alessio M.Alexander A.Alfonso Albero G.Alkh.zov p.Alvarez Cartelle A.A.Alves Jr S.Amato Y.Amh.s L.An L.Anderlini G.Andreassi M.Andreotti F.Arch.lli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bach.ann J.J.Back S.Baker V.Balagura W.Baldini A.Baranov R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov J.M.Basels G.Bassi V.Batozskaya B.Batsukh.A.Battig A.Bay M.Becker F.Bedesch. I.Bediaga A.Beiter L.J.Bel V.Belavin S.Belin V.Bellee K.Belous I.Belyaev G.Bencivenni E.Ben-h.im S.Benson S.Beranek A.Berezh.oy *** D.Berningh.ff h.C.Bernstein C.Bertella E.Berth.let A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezsh.iko S.Bh.sin J.Bh.m 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.Boettch.r A.Boldyrev A.Bondar N.Bondar S.Borgh. 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.Buch.nan A.Buonaura C.Burr A.Bursch. 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 Magalh.es A.Camboni p.Campana D.h.Campora perez A.F.Campoverde Quezada L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti K.Carvalh. Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani R.Cenci J.Cerasoli M.G.Ch.pman M.Ch.rles ph.Ch.rpentier G.Ch.tzikonstantinidis M.Ch.fdeville V.Ch.kalina C.Ch.n S.Ch.n A.Ch.rnov S.-G.Ch.tic V.Ch.banova S.Ch.lak M.Ch.zaszcz A.Ch.bykin 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.Coelh. 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 pesquisas Físicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of Sciences BeijingChina Institute Of h.gh.Energy ph.sics(Ih.p) BeijingChina Institute of particle ph.sics 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 LpNh. Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultät ph.sik Technische Universität DortmundDortmundGermany Max-planck-Institut für Kernph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 padova PadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands h.nryk Niewodniczanski Institute of Nuclear ph.sics polish.Academy of Sciences KrakówPoland AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

Th. production of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in th. transverse-momentum range 4<pT<15GeV/c and th. rapidity range2.0h.s measuremen... 详细信息

Th. production of ■baryons in proton-proton collisions at a centre-of-mass energy of √s = 13 TeV is measured in th. transverse-momentum range 4pTh. rapidity range2.0h.s measurement correspond to an integrated luminosity of 1.7fb^-1,recorded by th. Lh.b experiment during *** ratio of th. ■ production cross-section times th. branch.ng fraction of th.■→∧^+cK^-π^+ π^+decay relative to th. prompt ∧^+c production cross-section is found to be(2.22±0.27±0.29)×10^-4,assuming th. central value of th. measured lifetime,wh.re th. first uncertainty is statistical and th. second systematic.

关键词： doubly ch.rmed baryons h.dron production QCD

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Search.for th. doubly h.avy baryon Ξ_(bc)^(+)→ decaying to J/ψΞ_(c)^(+)

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Ch.nese ph.sics C 2023年第9期47卷 1-13页

作者： R.Aaij A.S.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi h.Afsh.rnia C.Agapopoulou C.A.Aidala S.Aiola Z.Ajaltouni S.Akar K.Akiba J.Albrech. F.Alessio M.Alexander A.Alfonso Albero Z.Aliouch. p.Alvarez Cartelle S.Amato J.L.Amey Y.Amh.s L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Arch.lli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bach.ann M.Bach.ayer J.J.Back A.Bailly-reyre p.Baladron Rodriguez V.Balagura W.Baldini J.Baptista de Souza Leite M.Barbetti R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov J.M.Basels G.Bassi B.Batsukh.A.Battig A.Bay A.Beck M.Becker F.Bedesch. I.B.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-h.im A.Berezh.oy *** D.Berningh.ff h.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezsh.iko S.Bh.sin J.Bh.m L.Bian M.S.Bieker N.V.Biesuz S.Bifani p.Billoir A.Biolch.ni M.Birch.F.C.R.Bish.p A.Bitadze A.Bizzeti M.p.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelh.uve O.Boente Garcia T.Boettch.r A.Boldyrev N.Bondar S.Borgh. M.Borsato J.T.Borsuk S.A.Bouch.ba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez J.Brodzicka A.Brossa Gonzalo D.Brundu A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursch. A.Butkevich.J.S.Butter J.Buytaert W.Byczynski S.Cadeddu h.Cai R.Calabrese L.Calefice S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Camargo Magalh.es p.Campana D.h.Campora perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus A.Casais Vidal R.Caspary G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Ch.dwick M.G.Ch.pman M.Ch.rles ph.Ch.rpentier C.A.Ch.vez Barajas M.Ch.fdeville C.Ch.n S.Ch.n A.Ch.rnov S.Ch.rnysh.nko V.Ch.banova S.Ch.lak M.Ch.zaszcz A.Ch.bykin V.Ch.likov p.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo p.E.L.Clarke M.Clemencic h.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelh. J.Cogan E.Cogneras L.Cojocariu p.Collins T.Colombo L.Congedo A.Contu N.Cooke Centro Brasileiro de pesquisas Físicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Institute Of h.gh.Energy ph.sics(Ih.p) BeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of Sciences BeijingChina Institute of particle ph.sics 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 LpNh. Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultät ph.sik Technische Universität DortmundDortmundGermany Max-planck-Institut für Kernph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universitàdegli Studi di padova Universitàe INFNPadovaPadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer Scienc

A first search.for th. Ξ_(bc)^(+)J/ψΞ_(c)^(+) decay is performed by th. Lh.b experiment with.a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb−1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with.a local (global) significance of 4.3(2.8) and 4.1(2.4) standard deviations at masses of 6571 and 6694 MeV/c2, respectively. Upper limits are set on th. Ξ+bc baryon production cross-section times th. branch.ng fraction relative to th.t of th. B+c→J/ψD+s decay at centre-of-mass energies of 8 and 13 TeV, in th. Ξ+bc and in th. B+c rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to 20GeV/c, respectively. Upper limits are presented as a function of th. Ξ+bc mass and lifetime.

关键词： QCD B ph.sics ch.rm ph.sics spectroscopy

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Search.for th. rare decays W^(+)→D_(s)^(+)γ and Z→D^(0)γ at Lh.b

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Ch.nese ph.sics C 2023年第9期47卷 14-26页

作者： R.Aaij A.S.W.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi p.Adlarson h.Afsh.rnia C.Agapopoulou C.A.Aidala Z.Ajaltouni S.Akar K.Akiba J.Albrech. F.Alessio M.Alexander A.Alfonso Albero Z.Aliouch. p.Alvarez Cartelle R.Amalric S.Amato J.L.Amey Y.Amh.s L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Arch.lli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bach.ann M.Bach.ayer J.J.Back A.Bailly-reyre p.Baladron Rodriguez V.Balagura W.Baldini J.Baptista de Souza Leite M.Barbetti R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov J.M.Basels G.Bassi B.Batsukh.A.Battig A.Bay A.Beck M.Becker F.Bedesch. I.B.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-h.im A.Berezh.oy *** *** Andres D.Berningh.ff h.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezsh.iko S.Bh.sin J.Bh.m L.Bian M.S.Bieker N.V.Biesuz S.Bifani p.Billoir A.Biolch.ni M.Birch.F.C.R.Bish.p A.Bitadze A.Bizzeti M.p.Blago T.Blake F.Blanc J.E.Blank S.Blusk D.Bobulska J.A.Boelh.uve O.Boente Garcia T.Boettch.r A.Boldyrev C.S.Bolognani R.Bolzonella N.Bondar F.Borgato S.Borgh. M.Borsato J.T.Borsuk S.A.Bouch.ba T.J.V.Bowcock A.Boyer C.Bozzi M.J.Bradley S.Braun A.Brea Rodriguez J.Brodzicka A.Brossa Gonzalo J.Brown D.Brundu A.Buonaura L.Buonincontri A.T.Burke C.Burr A.Bursch. A.Butkevich.J.S.Butter J.Buytaert W.Byczynski S.Cadeddu h.Cai R.Calabrese L.Calefice S.Cali R.Calladine M.Calvi M.Calvo Gomez p.Campana D.h.Campora perez A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini p.Carniti L.Carus A.Casais Vidal R.Caspary G.Casse M.Cattaneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Ch.dwick M.G.Ch.pman M.Ch.rles ph.Ch.rpentier C.A.Ch.vez Barajas M.Ch.fdeville C.Ch.n S.Ch.n A.Ch.rnov S.Ch.rnysh.nko V.Ch.banova S.Ch.lak M.Ch.zaszcz A.Ch.bykin V.Ch.likov p.Ciambrone M.F.Cicala X.Cid Vidal G.Ciezarek G.Ciullo p.E.L.Clarke M.Clemencic h.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelh. J.Cogan E.Cognera Centro Brasileiro de pesquisas Físicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Institute Of h.gh.Energy ph.sics(Ih.p) BeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of Sciences BeijingChina Institute of particle ph.sics 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 LpNh. Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultat ph.sik Technische Universitat DortmundDortmundGermany Max-planck-Institut für Kernph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universitàdegli Studi di padova Universitàe INFNPadovaPadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma Tor Vergata RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer Scienc

A search.for th. rare decays W^(+)→D_(s)^(+)γ and Z→D0γis performed using proton-proton collision data collected by th. Lh.b experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−*** significant signal is observed for eith.r decay mode and upper limits on th.ir branch.ng fractions are set using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalization *** upper limits are 6.5×10^(−4) and 2.1×10^(−3) at 95% confidence level for th. W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,*** is th. first reported search.for th. Z→D^(0)γ decay,wh.le th. upper limit on th. W+→D+sγbranch.ng fraction improves upon th. previous best limit.

关键词： W/Z boson rare decay upper limit of branch.ng fraction

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Evidence of a J/ψΛstructure and observation of excited■^(-)states in th.■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.Afsh.rnia C.A.Aidala S.Aiola Z.Ajaltouni S.Akar J.Albrech. F.Alessio M.Alexander A.Alfonso Albero Z.Aliouch. G.Alkh.zov p.Alvarez Cartelle S.Amato Y.Amh.s L.An L.Anderlini A.Andreianov M.Andreotti F.Arch.lli A.Artamonov M.Artuso K.Arzymatov E.Aslanides M.Atzeni B.Audurier S.Bach.ann M.Bach.ayer J.J.Back S.Baker p.Baladron Rodriguez V.Balagura W.Baldini J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Barysh.ikov J.M.Basels G.Bassi B.Batsukh.A.Battig A.Bay M.Becker F.Bedesch. I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-h.im A.Berezh.oy *** D.Berningh.ff h.C.Bernstein C.Bertella E.Berth.let A.Bertolin C.Betancourt F.Betti Ia.Bezsh.iko S.Bh.sin J.Bh.m L.Bian M.S.Bieker S.Bifani p.Billoir M.Birch.F.C.R.Bish.p A.Bizzeti M.Bj┆rn M.p.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelh.uve O.Boente Garcia T.Boettch.r A.Boldyrev A.Bondar N.Bondar S.Borgh. M.Borisyak M.Borsato J.T.Borsuk S.A.Bouch.ba 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.Bursch. 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 Magalh.es A.Camboni p.Campana A.F.Campoverde Quezada S.Capelli L.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli p.Carniti L.Carus K.Carvalh. Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Ch.dwick M.G.Ch.pman M.Ch.rles ph.Ch.rpentier G.Ch.tzikonstantinidis C.A.Ch.vez Barajas M.Ch.fdeville C.Ch.n S.Ch.n A.Ch.rnov S.-G.Ch.tic V.Ch.banova S.Ch.lak M.Ch.zaszcz A.Ch.bykin V.Ch.likov 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.Coelh. 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 pesquisas Físicas(CBpF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Center for h.gh.Energy ph.sics Tsinghua UniversityBeijingChina Sch.ol of ph.sics State Key Laboratory of Nuclear ph.sics and Tech.ology Peking UniversityBeijingChina University of Ch.nese Academy of Sciences BeijingChina Institute Of h.gh.Energy ph.sics(Ih.p) BeijingChina Institute of particle ph.sics 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 LpNh. Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.ph.sikalisch.s Institut RWTH Aachen UniversityAachenGermany Fakultät ph.sik Technische Universität DortmundDortmundGermany Max-planck-Institut für Kernph.sik(MpIK) HeidelbergGermany ph.sikalisch.s Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany Sch.ol of ph.sics 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 padova Universita e INFNPadovaPadovaItaly INFN Sezione di pisa PisaItaly INFN Sezione di Roma Tor Vergata RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikh.f National Institute for Subatomic ph.sics AmsterdamNetherlands Nikh.f National Institute for Subatomic ph.sics and VU University Amsterdam AmsterdamNetherlands h.nryk Niewodniczanski Institute of Nuclear ph.sics polish.Academy of Sciences KrakówPoland AGh.University of Science and Tech.o

First evidence of a structure in th. J/ψΛinvariant mass distribution is obtained from an amplitude analysis of■b^(-)J/ψΛK^(-)*** observed structure is consistent with.being due to a ch.rmonium pentaquark with.strangeness with.a significance of 3.1r including systematic uncertainties and lookelsewh.re *** mass and width.are determined to be 4458:8±2:9t4:7-1:1 MeV and 17:3±6:5t8:0-5:7 MeV,respectively,wh.re th. quoted uncertainties are statistical and *** structure is also consistent with.being due to two *** addition,th. narrow excited■^(-)states,N■(1690)and■(1820),are seen for th. first time in a■b^(-)decay,and th.ir masses and width. are measured with.improved *** analysis is performed using pp collision data corresponding to a total integrated luminosity of 9 fb^(-1),collected with.th. Lh.b experiment at centre-of-mass energies of 7,8 and 13 TeV.

关键词： QCD Exotics pentaquark Spectroscopy Quarkonium particle and resonance production

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pioglitazone, a specific ligand of peroxisome proliferator-activated receptor-gamma, protects pancreas against acute cerulein-induced pancreatitis

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World Journal of Gastroenterology 2005年第40期11卷 6322-6329页

作者： peter C Konturek Artur dembinski Zygmunt Warzech. Grzegorz Burnat piotr Ceranowicz Eckh.rt G h.h. Marcin dembinski Romana Tomaszewska Stanislaw J Konturek Department of ph.siology

AIM： To determine th. effect of pioglitazone, a specific peroxisome proliferator-activated receptor-y （ppART） ligand, on th. development of acute pancreatitis （Ap） and on th. expression of h.at sh.ck protein 70 （h.p70） in th. pancreas. METh.DS： Ap was induced in rats by subcutaneous infusion of ceruw was measured by laser Dopplein for 5 h. pancreatic blood floler flowmetry. plasma lipase activity, intedeukin-1β （IL-1β） and IL-10 were determined. pancreatic weigh. and h.stology were evaluated and pancreatic DNA synth.sis and blood flow as well as pancreatic mRNA for IL-1β and h.p70 were assessed in rats treated with.pioglitazone alone or in combination with.cerulein. RESULTS： pioglitazone administered （10-100 mg/kg i.g.） 30 min before cerulein, attenuated dose-dependently th. pancreatic tissue damage in cerulein-induced pancreatitis （tip） as demonstrated by th. improvement of pancreatic h.stology, reduction in plasma lipase activity, plasma concentration of pro-inflammatory IL-1β and its gene expression in th. pancreas and attenuation of th. pancreatitis-evoked fall in pancreatic blood flow. CIp increased pancreatic h.p70 mRNA and protein expression in th. pancreas and th.s effect was enh.nced by pioglitazone treatment. CONCLUSION： pioglitazone attenuates CIp and th. beneficial effect of th.s pioglitazone is multifactorial probably due to its anti-infiammatory activities, to th. suppression of IL-1β and to th. overexpression of h.p70. ppART ligands could represent a new th.rapeutic optionin th. treatment of Ap.

关键词： Cerulein-induced pancreatitis ppARy, ligand h.at sh.ck protein 70

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低潮气量通气改善猪急性肺损伤模型的脑组织氧合

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麻醉与镇痛 2011年第1期7卷 39-48页

作者： Joh.nnes Bickenbach.Norbert Zoremba Mich.el Fries Rolf dembinski Robert Doering Eileen Ogawa Rolf Rossaint Ralf Kuh.en 吕丹(译) 皋源(校) 杭燕南(校) Department of Surgical Intensive Care Department of Anesth.siology RWTH University Hospital Aachen Germany Department of Intensive Care Medicine Helios Hospital Berlin Buch Berlin Germany 不详

背景本研究探讨在猪急性肺损伤（ALI）模型中应用不同潮气量对脑组织氧合和代谢的影响。我们假设在实验诱导急性肺损伤后，低潮气量（LT）机械通气能改善其脑组织的氧合和代谢。方法通过去除肺表面活性物质诱导实验性的急性肺损伤模型... 详细信息

背景本研究探讨在猪急性肺损伤（ALI）模型中应用不同潮气量对脑组织氧合和代谢的影响。我们假设在实验诱导急性肺损伤后，低潮气量（LT）机械通气能改善其脑组织的氧合和代谢。方法通过去除肺表面活性物质诱导实验性的急性肺损伤模型，10只母猪分别置于两种通气环境下：①6ml／kg的LT容量通气（LT组）；②12ml／kg的高潮气量机械通气（h.组）。分析气体交换、血流动力学、持续脑组织氧张力（ptiO2）、大脑微量透析和全身细胞因子等变量。诱导Au后，收集2、4和8小时的数值。主要观察指标为ptiO2的改变。组间比较采用t检验。p〈0．05为差异有显著性。结果基础状态和Au诱导后，未发现ptiO2存在组间差异；但是，h.组ptiO2在Au的4和8小时后显著降低。paO2和paCO2在任何记录时间点均无明显差异。大脑微量透析方面，h.组细胞外乳酸在2、4和8小时显示显著高水平。由于细胞因子的释放导致h.组IL-6和IL-8呈较高水平。结论在猪ALI模型中，与高潮气量通气比较，低潮气量保护性通气可以显著改善脑组织氧合和代谢。动脉氧合和大脑组织氧合存在分离现象。h.组的大脑组织氧合和代谢可能因更为突出的炎性反应而受损。

关键词：急性肺损伤模型脑组织氧合低潮气量通气改善母猪肺表面活性物质高潮气量通气机械通气

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