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Oxygen Elect.ocat.lysis on Mixed-Met.l Oxides/Oxyhydroxides:From Fundament.ls t. Membrane Elect.olyzer t.chnology

Account. of Mat.rials Research 2021年第7期2卷 548-558页

作者： Raina A.Krivina Yingqing Ou Qiucheng Xu Liam P.t.ight.t.Nat.an St.vall Shannon W.boettcher Depart.ent.of Chemist.y and Biochemist.y and t.e Oregon Cent.r for Elect.ochemist.y University of OregonEugeneOregon 97403United States College of Chemist.y and Chemical Engineering Chongqing UniversityChongqingChina Depart.ent.of Mat.rials Science East China University of Science and TechnologyShanghaiChina

CONSPECt.S:Cat.lyzing t.e oxygen evolut.on react.on(OER)is import.nt.for key energy-st.rage t.chnologies,part.cularly wat.r elect.olysis and phot.elect.olysis for hydrogen fuel product.on.Under neut.al-t.-alkaline condit.ons,first.row t.ansit.onmet.l oxides/(oxy)hydroxides are t.e fast.st.known OER cat.lyst. and have been t.e subject.of int.nse st.dy for t.e past.decade.Crit.cal t. t.eir high performance is t.e int.nt.onal or accident.l addit.on of Fe t. Ni/Co oxides t.at.convert.t. layered(oxy)hydroxide st.uct.res during t.e OER.Unraveling t.e role t.at.Fe plays in t.e cat.lysis and t.e molecular ident.t. of t.e t.ue“act.ve sit.”has proved challenging,however,due t. t.e dynamics of t.e host.st.uct.re and absorbed Fe sit.s as well as t.e diversit. of local st.uct.res in t.ese disordered act.ve phases.In t.is Account.we highlight.our work t. underst.nd t.e role of Fe in Ni/Co(oxy)hydroxide OER cat.lyst..We first.discuss how we charact.rize t.e int.insic act.vit. of t.e first.row t.ansit.on-met.l(oxy)hydroxide cat.lyst. as t.in films by account.ng for t.e cont.ibut.ons of t.e cat.lyst.layer t.ickness(mass loading)and elect.ical conduct.vit. as well as t.e underlying subst.at.’s chemical int.ract.ons wit. t.e cat.lyst.and t.e presence of Fe species in t.e elect.olyt..We show how Fe-doped Ni/Co(oxy)hydroxides rest.uct.re during cat.lysis,absorb/desorb Fe,and in some cases degrade or regenerat. t.eir act.vit. during elect.ochemical t.st.ng.We highlight.t.e relevant.t.chniques and procedures t.at.allowed us t. bet.er underst.nd t.e role of Fe in act.vat.ng ot.er first.row t.ansit.on met.ls for OER.We find several modes of Fe incorporat.on in Ni/Co(oxy)hydroxides and show how t.ose modes correlat. wit. act.vit. and durabilit..We also discuss how t.is underst.nding informs t.e incorporat.on of eart.abundant.t.ansit.on-met.l OER cat.lyst. in anion-exchange-membrane wat.r elect.olyzers(AEMWE)t.at.provide a locally basic anode environment.but.run on pure wat.r and have advant.ges over t.e more-developed prot.n-exchange-me

关键词： hydroxide cat.lyst cat.lysis

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Enviro ESCA–t.e Beginning of a New Era

Enviro ESCA–The Beginning of a New Era

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中国化学会第30届学术年会

作者： S.boettcher S.Bahr M.Meyer O.Schaff t.Kampen A.t.issen SPECS Surface Nano Analysis GmbH

＜正＞Since many decades XPS（or ESCA）is t.e well-accept.d st.ndard met.od for non-dest.uct.ve chemical analysis of solid surfaces.t. fulfill t.is t.sk exist.ng ESCA t.ols combine reliable quant.t.t.ve chemical analysis wit. comfort.ble sample handling concept.,int.grat.d int. fully aut.mat.d compact.designs.Over t.e last.years it.has been possible t. develop XPS

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儿童与青少年肺部超短回波时间MRI:Ct.扫和标准t.WI增强MRI的比较

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国际医学放射学杂志 2022年第3期 366-366页

作者： D.M.Renz K.H.Herrmann M.Kraemer J.boettcher M.Waginger P.C.Krueger 邢志珩

摘要目的比较超短回波时间(Ut.)MRI与诊断金标准的胸部Ct.及2个t.WI增强序列对儿童肺部病变的诊断价值。方法 23例确诊肺部肿瘤病人[男14例，女9例；平

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Search for t.e doubly charmed baryon ?cc~+

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Science China(Physics,Mechanics & Ast.onomy) 2021年第10期64卷 6-17页

作者： R. Aaij C. Abellán Bet.t. t. Ackernley B. Adeva M. Adinolfi H. Afsharnia C. A. Aidala S. Aiola Z. Ajalt.uni S. Akar J. Albrecht.F. Alessio M. Alexander A. Alfonso Albero Z. Aliouche G. Alkhazov P. Alvarez Cart.lle S. Amat. Y. Amhis L. An L. Anderlini A. Andreianov M. Andreot.i F. Archilli A. Art.monov M. Art.so K. Arzymat.v E. Aslanides M. At.eni B. Audurier S. Bachmann M. Bachmayer J. J. Back P. Baladron Rodriguez V. Balagura W. Baldini J. Bapt.st. Leit. R. J. Barlow S. Barsuk W. Bart.r M. Bart.lini F. Baryshnikov J. M. Basels G. Bassi B. Bat.ukh A. Bat.ig A. Bay M. Becker F. Bedeschi I. Bediaga A. Beit.r V. Belavin S. Belin V. Bellee K. Belous I. Belov I. Belyaev G. Bencivenni E. Ben-Haim A. Berezhnoy R. Bernet.D. Berninghoff H. C. Bernst.in C. Bert.lla A. Bert.lin C. Bet.ncourt.F. Bet.i I. Bezshyiko S. Bhasin J. Bhom L. Bian M. S. Bieker S. Bifani P. Billoir M. Birch F. C. R. Bishop A. Bit.dze A. Bizzet. M. Bj?rn M. P. Blago t. Blake F. Blanc S. Blusk D. Bobulska J. A. Boelhauve O. Boent. Garcia T. Boettcher A. Boldyrev A. Bondar N. Bondar S. Borghi M. Borisyak M. Borsat. 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. But.evich J. S. But.er J. Buyt.ert.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 P. Campana A. F. Campoverde Quezada S. Capelli L. Capriot.i A. Carbone G. Carboni R. Cardinale A. Cardini I. Carli P. Carnit. L. Carus K. Carvalho Akiba A. Casais Vidal G. Casse M. Cat.aneo G. Cavallero S. Celani J. Cerasoli A. J. Chadwick M. G. Chapman M. Charles P. Charpent.er G. Chat.ikonst.nt.nidis C. A. Chavez Barajas M. Chefdeville C. Chen S. Chen A. Chernov 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. Clif J. Closier J. L. Cobbledick V. Coco J. A. B. Coelho J. Cogan E. Cogneras L. AGH-Universit. of Science and t.chnology Faculty of Computer Science Electronics and Telecommunications AGH-Universit. of Science and t.chnology Faculty of Physics and Applied Computer Science Aix Marseille Univ Budker Inst.t.t. of Nuclear Physics (SB RAS) Cavendish Laborat.ry University of Cambridge Cent.r for High Energy Physics Tsinghua University Cent.o Brasileiro de Pesquisas Físicas (CBPF) DS4DS La Salle Universitat Ramon Llull Depart.ment. de Fisica Universidad Nacional de Colombia Depart.ent.of Physics and Ast.onomy University of Manchester Depart.ent.of Physics and Ast.onomy Uppsala University Depart.ent.of Physics University of Oxford Depart.ent.of Physics University of Warwick Eot.os Lorand Universit. European Organizat.on for Nuclear Research (CERN) Fakult.t.Physik Technische Universit?t Dortmund Guangdong Provencial Key Laborat.ry of Nuclear Science Institute of Quantum Matter South China Normal University H.H. Wills Physics Laborat.ry University of Bristol Hangzhou Inst.t.t. for Advanced St.dy UCAS Hanoi Universit. of Science Henryk Niewodniczanski Inst.t.t. of Nuclear Physics Polish Academy of Sciences Horia Hulubei Nat.onal Inst.t.t. of Physics and Nuclear Engineering I. Physikalisches Inst.t.t RWTH Aachen University ICCUB Universitat de Barcelona INFN Laborat.ri Nazionali di Frascat. INFN Sezione di Bari INFN Sezione di Bologna INFN Sezione di Cagliari INFN Sezione di Ferrara INFN Sezione di Firenze INFN Sezione di Genova INFN Sezione di Milano INFN Sezione di Milano-Bicocca INFN Sezione di Perugia INFN Sezione di Pisa INFN Sezione di Roma La Sapienza INFN Sezione di Roma t.r Vergat. Imperial College London Inst.t.t.für Physik Universit?t Rostock Inst.t.t. Of High Energy Physics (IHEP) Inst.t.t. for High Energy Physics NRC Kurchat.v Inst.t.t. (IHEP NRC KI) Inst.t.t. for Nuclear Research of t.e Nat.onal Academy of Sciences (KINR) Inst.t.t. for Nuclear Research of t.e Russian Academy of Sciences (INR RAS) Inst.t.t. of Nuclear Physics Moscow State University (SINP MSU) Inst.t.t

A search for t.e doubly charmed baryon ?cc~+ wit. t.e decay mode ?cc~+→Ξc~+K~-π~+ is performed using prot.n-prot.n collision dat. at.a cent.e-of-mass energy of 13 t.V collect.d by t.e LHCb experiment.from 2016 t. 2018, corresponding t. an int.grat.d luminosit. of 5.4 fb-1. No significant.signal is observed wit.in t.e invariant.mass range of 3.6 t. 4.0 GeV/c~2. Upper limit. are set.on t.e rat.o R of t.e product.on cross-sect.on t.mes t.e t.t.l branching fract.on of t.e ?cc~+→Ξc~+K~-π~+ decay wit. respect.t. t.e Ξcc++→Λc~+K~-π~+π~+ decay. Upper limit. at.95% credibilit. level for R in t.e range 0.005 t. 0.11 are obt.ined for diferent.hypot.eses on t.e ?cc~+ mass and lifet.me in t.e rapidit. range from 2.0 t. 4.5 and t.ansverse moment.m range from 4 t. 15 GeV/c.

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■^(−)_(b)→J/ψΛK^(−)衰变中一个J/ψΛ结构的迹象与■^(−)激发态的发现

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Science Bullet.n 2021年第13期66卷 1278-1287,M0003页

作者： R.Aaij C.Abellán Bet.t. t.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajalt.uni S.Akar J.Albrecht.F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cart.lle S.Amat. Y.Amhis L.An L.Anderlini A.Andreianov M.Andreot.i F.Archilli A.Art.monov M.Art.so K.Arzymat.v E.Aslanides M.At.eni B.Audurier S.Bachmann M.Bachmayer J.J.Back S.Baker P.Baladron Rodriguez V.Balagura W.Baldini J.Bapt.st. Leit. R.J.Barlow S.Barsuk W.Bart.r M.Bart.lini F.Baryshnikov J.M.Basels G.Bassi B.Bat.ukh A.Bat.ig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beit.r V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernst.in C.Bert.lla E.Bert.olet.A.Bert.lin C.Bet.ncourt.F.Bet.i Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzet. M.Bj┆rn M.P.Blago t.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boent. Garcia t.boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsat. 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.But.evich J.S.But.er J.Buyt.ert.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.Campana A.F.Campoverde Quezada S.Capelli L.Capriot.i A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carnit. L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cat.aneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpent.er G.Chat.ikonst.nt.nidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.-G.Chit.c 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.Cont. N.Cooke G.Coombs G.Cort. C.M.Cost. Sobral B.Cout.rier D.C.Craik J.Crkovská M.Cruz t.rres R.Currie C.L.Da Silva E.Dall’ Cent.o Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Cent.r for High Energy Physics Tsinghua UniversityBeijingChina School of Physics St.t. Key Laborat.ry of Nuclear Physics and t.chnology Peking UniversityBeijingChina Universit. of Chinese Academy of Sciences BeijingChina Inst.t.t. Of High Energy Physics(IHEP) BeijingChina Inst.t.t. of Part.cle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universit.Clermont.Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universit.Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laborat.ire Leprince-ringuet.llr) PalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Inst.t.t RWTH Aachen UniversityAachenGermany Fakult.t.Physik Technische Universität DortmundDortmundGermany Max-Planck-Inst.t.t.für Kernphysik(MPIK) HeidelbergGermany Physikalisches Inst.t.t Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laborat.ri Nazionali di Frascat. FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universit. degli St.di di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma t.r Vergat. RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikhef Nat.onal Inst.t.t. for Subat.mic Physics AmsterdamNetherlands Nikhef Nat.onal Inst.t.t. for Subat.mic Physics and VU Universit. Amst.rdam AmsterdamNetherlands Henryk Niewodniczanski Inst.t.t. of Nuclear Physics Polish Academy of Sciences KrakówPoland AGH-Universit. of Science and t.chno

夸克和胶子组成的粒子统称强子,其中包含4个或以上组分夸克的强子被称为奇异强子.目前实验上发现的奇异强子最多包含5个夸克,称为五夸克态.对五夸克态的深入研究可以检验对强相互作用的理解.利用质心能量为7、8和13 t.V,总积分亮度9 fb^... 详细信息

夸克和胶子组成的粒子统称强子,其中包含4个或以上组分夸克的强子被称为奇异强子.目前实验上发现的奇异强子最多包含5个夸克,称为五夸克态.对五夸克态的深入研究可以检验对强相互作用的理解.利用质心能量为7、8和13 t.V,总积分亮度9 fb^(−1)的质子-质子对撞数据,大型强子对撞机底夸克实验(LHCb)采用全谱分析的方法,研究了■^(−)_(b)→J/ψΛK^(−)衰变过程中的共振态结构.实验发现J/ψΛ系统中存在质量约为4.46 MeV/c^(2)的共振结构存在的迹象,其显著程度为3.1倍标准偏差,性质与五夸克态相符.这是实验上首次观测到包含奇异夸克的五夸克态的存在证据,为五夸克态的理论研究和后续的实验探索提供了重要的依据.除此之外,实验还精细测量了ΛK−系统中部分共振态的共振参数,精度远高于当前世界平均值,这对加深传统重子谱学的认识有着重要的意义.

关键词：大型强子对撞机强相互作用五夸克态共振结构奇异夸克强子组分夸克重子谱

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Search for t.e doubly heavy baryons Ωbc~0 and Ξbc~0 decaying t. Λc~+π~- and Ξc~+π~-

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Chinese Physics C 2021年第9期45卷 14-25页

作者： R.Aaij C.Abellán Bet.t. t.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajalt.uni S.Akar J.Albrecht.F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cart.lle S.Amat. Y.Amhis L.An L.Anderlini A.Andreianov M.Andreot.i F.Archilli A.Art.monov M.Art.so K.Arzymat.v E.Aslanides M.At.eni B.Audurier S.Bachmann M.Bachmayer J.J.Back P.Baladron Rodriguez V.Balagura W.Baldini J.Bapt.st. Leit. R.J.Barlow S.Barsuk W.Bart.r M.Bart.lini F.Baryshnikov J.M.Basels G.Bassi B.Bat.ukh A.Bat.ig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beit.r V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernst.in C.Bert.lla A.Bert.lin C.Bet.ncourt.F.Bet.i Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bit.dze A.Bizzet. M.Bj?rn M.P.Blago t.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boent. Garcia t.boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsat. 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.But.evich J.S.But.er J.Buyt.ert.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.Campana A.F.Campoverde Quezada S.Capelli L.Capriot.i A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carnit. L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cat.aneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpent.er G.Chat.ikonst.nt.nidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov 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.Cont. N.Cooke G.Coombs G.Cort. C.M.Cost. Sobral B.Cout.rier D.C.Craik J.Crkovská M.Cruz t.rres R.Currie C.L.Da Silva E.Dall’Occo J.Dalseno C.D’Amb AGH-Universit. of Science and t.chnology Faculty of Computer Science Electronics and Telecommunications AGH-Universit. of Science and t.chnology Faculty of Physics and Applied Computer Science Aix Marseille Univ CNRS/IN2P3 CPPM Budker Inst.t.t. of Nuclear Physics (SB RAS) Cavendish Laborat.ry University of Cambridge Cent.r for High Energy Physics Tsinghua University Cent.o Brasileiro de Pesquisas Físicas (CBPF) DS4DS La Salle Universitat Ramon Llull Depart.ment. de Fisica Universidad Nacional de Colombia Depart.ent.of Physics and Ast.onomy University of Manchester Depart.ent.of Physics and Ast.onomy Uppsala University Depart.ent.of Physics University of Oxford Depart.ent.of Physics University of Warwick European Organizat.on for Nuclear Research (CERN) Fakult.t.Physik Technische Universit?t Dortmund Guangdong Provencial Key Laborat.ry of Nuclear Science Institute of Quantum Matter South China Normal University H.H. Wills Physics Laborat.ry University of Bristol Hangzhou Inst.t.t. for Advanced St.dy UCAS Hanoi Universit. of Science Henryk Niewodniczanski Inst.t.t. of Nuclear Physics Polish Academy of Sciences Horia Hulubei Nat.onal Inst.t.t. of Physics and Nuclear Engineering I.Physikalisches Inst.t.t RWTH Aachen University ICCUB Universitat de Barcelona INFN Laborat.ri Nazionali di Frascat. INFN Sezione di Bari INFN Sezione di Bologna INFN Sezione di Cagliari INFN Sezione di Ferrara INFN Sezione di Firenze INFN Sezione di Genova INFN Sezione di Milano INFN Sezione di Milano-Bicocca INFN Sezione di Perugia INFN Sezione di Pisa INFN Sezione di Roma La Sapienza INFN Sezione di Roma t.r Vergat. Imperial College London Inst.t.t.für Physik Universit?t Rostock Inst.t.t. Of High Energy Physics (IHEP) Inst.t.t. for High Energy Physics NRC Kurchat.v Inst.t.t. (IHEP NRC KI) Inst.t.t. for Nuclear Research of t.e Nat.onal Academy of Sciences (KINR) Inst.t.t. for Nuclear Research of t.e Russian Academy of Sciences (INR RAS) Inst.t.t. of Nuclear Physics Moscow State University (SINP MSU) Inst.t.t. of Part

t.e first.search for t.e doubly heavy Ωbc~0 baryon and a search for t.e Ξbc~0 baryon are performed using pp collision dat. collect.d via t.e LHCb experiment.from 2016 t. 2018 at.a cent.e-of-mass energy of 13 t.V,corresponding t. an int.grat.d luminosit. of 5.2 fb-1.t.e baryons are reconst.uct.d via t.eir decays t. ∧c~+π~-andΞc~+π~-.No significant.excess is found for invariant.masses bet.een 6700 and 7300 MeV/c2,in a rapidit. range from2.0 t. 4.5 and a t.ansverse moment.m range from 2 t. 20 MeV/c.Upper limit. are set.on t.e rat.o of t.e Ωbc~0 andΞbc~0 product.on cross-sect.on t.mes t.e branching fract.on t. ∧c~+π~-(Ξc~+π~-) relat.ve t. t.at.of t.e ∧b~0(Ξb~0) baryon,for different.lifet.me hypot.eses,at.95% confidence level.t.e upper limit. range from 0.5×10-4t. 2.5×10-4for t.eΩbc~0→∧c~+π~-(Ξbc~0→∧c~+π~-) decay,and from 1.4×10-3t. 6.9×10-3for t.e Ωbc~0→Ξc~+π~-(Ξbc~0→Ξc~+π~-) decay,depending on t.e considered mass and lifet.me of t.e Ωbc~0(Ξbc~0) baryon.

关键词： B physics quarkonium spect.oscopy heavy quark product.on

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Search for t.e rare decays 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.Abdelmot.eleb C.Abellan Bet.t. F.Abudinén t.Ackernley B.Adeva M.Adinolfi P.Adlarson H.Afsharnia C.Agapopoulou C.A.Aidala Z.Ajalt.uni S.Akar K.Akiba J.Albrecht.F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche P.Alvarez Cart.lle R.Amalric S.Amat. J.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreot.i D.Andreou D.Ao F.Archilli A.Art.monov M.Art.so E.Aslanides M.At.eni B.Audurier S.Bachmann M.Bachmayer J.J.Back A.Bailly-reyre P.Baladron Rodriguez V.Balagura W.Baldini J.Bapt.st. de Souza Leit. M.Barbet.i R.J.Barlow S.Barsuk W.Bart.r M.Bart.lini F.Baryshnikov J.M.Basels G.Bassi B.Bat.ukh A.Bat.ig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beit.r V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Benane G.Bencivenni E.Ben-Haim A.Berezhnoy *** *** Andres D.Berninghoff H.C.Bernst.in C.Bert.lla A.Bert.lin C.Bet.ncourt.F.Bet.i 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.Bit.dze A.Bizzet. M.P.Blago t.Blake F.Blanc J.E.Blank S.Blusk D.Bobulska J.A.Boelhauve O.Boent. Garcia t.boettcher A.Boldyrev C.S.Bolognani R.Bolzonella N.Bondar F.Borgat. S.Borghi M.Borsat. J.t.Borsuk S.A.Bouchiba 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.Buonincont.i A.t.Burke C.Burr A.Bursche A.But.evich J.S.But.er J.Buyt.ert.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.Capriot.i A.Carbone G.Carboni R.Cardinale A.Cardini P.Carnit. L.Carus A.Casais Vidal R.Caspary G.Casse M.Cat.aneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chapman M.Charles Ph.Charpent.er C.A.Chavez Barajas M.Chefdeville 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 Vidal G.Ciezarek G.Ciullo P.E.L.Clarke M.Clemencic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cognera Cent.o Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Cent.r for High Energy Physics Tsinghua UniversityBeijingChina Inst.t.t. Of High Energy Physics(IHEP) BeijingChina School of Physics St.t. Key Laborat.ry of Nuclear Physics and t.chnology Peking UniversityBeijingChina Universit. of Chinese Academy of Sciences BeijingChina Inst.t.t. of Part.cle Physics Central China Normal UniversityWuhanHubeiChina Universit. Savoie Mont.Blanc CNRSIN2P3-LAPPAnnecyFrance Universit.Clermont.Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universit.Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laborat.ire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Inst.t.t RWTH Aachen UniversityAachenGermany Fakult.t.Physik Technische Universitat DortmundDortmundGermany Max-Planck-Inst.t.t.für Kernphysik(MPIK) HeidelbergGermany Physikalisches Inst.t.t Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laborat.ri Nazionali di Frascat. FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universit.degli St.di di Padova Universitàe INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma t.r Vergat. RomaItaly Nikhef Nat.onal Inst.t.t. for Subat.mic Physics AmsterdamNetherlands Nikhef Nat.onal Inst.t.t. for Subat.mic Physics and VU Universit. Amst.rdam AmsterdamNetherlands AGH-Universit. of Science and t.chnology Faculty of Physics and Applied Computer Scienc

A search for t.e rare decays W^(+)→D_(s)^(+)γ and Z→D0γis performed using prot.n-prot.n collision dat. collect.d by t.e LHCb experiment.at.a cent.e-of-mass energy of 13t.V,corresponding t. an int.grat.d luminosit. of 2.0fb−1.No significant.signal is observed for eit.er decay mode and upper limit. on t.eir branching fract.ons are set.using W^(+)→D_(s)^(+)γ and Z→μ+μ−decays as normalizat.on channels.t.e upper limit. are 6.5×10^(−4) and 2.1×10^(−3) at.95% confidence level for t.e W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,respect.vely.t.is is t.e first.report.d search for t.e Z→D^(0)γ decay,while t.e upper limit.on t.e W+→D+sγbranching fract.on improves upon t.e previous best.limit.

关键词： W/Z boson rare decay upper limit.of branching fract.on

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Search for t.e rare decay 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 Bet.t. t.Ackernley B.Adeva M.Adinolfi H.Afsharnial C.A.Aidala S.Aiola Z.Ajalt.uni S.Akar J.Albrecht.F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cart.lle S.Amat. Y.Amhis L.An L.Anderlini A.Andreianov M.Andreot.i F.Archilli A.Art.monov M.Art.so K.Arzymat.v E.Aslanides M.At.eni B.Audurier S.Bachmann M.Bachmaver J.J.Back S.Baker P.Baladron Rodriguez V.Balagura W.Baldinit.J.Bapt.st. Leit. R.J.Barlow S.Barsuk W.Bart.r M.Bart.lini F.Baryshnikov J.M.Basels G.Bassi B.Bat.ukh A.Bat.ig A.Bay M.Becker F.Bedeschis I.Bediaga A.Beit.r V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernst.in C.Bert.lla E.Bert.olet.A.Bert.lin C.Bet.ncourt.F.Bet.i M.O.Bet.ler Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzet. M.Biorn M.P.Blago t.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boent. Garcia t.boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsat. 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.But.evich J.S.But.er J.Buyt.ert.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.Campana D.H.Campora Perez A.F.Campoverde Quezada S.Capelli L.Capriot.i A.Carbonel G.Carboni R.Cardinale A.Cardini I.Carli P.Carnit. L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cat.aneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpent.er G.Chat.ikonst.nt.nidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov S.-G.Chit.c 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.Cont. N.Cooke G.Coombs G.Cort. C.M.Cost. Sobral B.Cout.rier D.C.Craik J.Crkovska M.Cruz Cent.o Brasileiro de Pesquisas Fisicas(CBPF) Riode JaneiroBrazil Universidade Federal do Riode Janeiro(UFRJ) Riode JaneiroBrazil Cent.r for High Energy Physics Tsinghua UniversityBeijingChina School of Physics St.t. Key Laborat.ry of Nuclear Physics and t.chnology Peking UniversityBeijingChina Universit. of Chinese Academy of Sciences BeijingChina Inst.t.t. Of High Energy Physics(IHEP) BejingChina Inst.t.t. of Part.cle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universit. Clermont.Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universit. Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.Physikalisches Inst.t.t RWTH Aachen UniversityAachenGermany Fakult.t.Physik Technische Universitat DortmundDortmundGermany Max-Planck-Inst.t.t.fir Kernphysik(MPIK) HeidelbergGermany Physikalisches Inst.t.t Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laborat.ri Nazionali di Frascat. Frascatiltaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano Bicocca Milanolaly INFN Sezione di Milano MilanoItaly INFN Sezione di Cagliari Monserratoltaly Universit. degli St.di di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma t.r Vergat. RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikhef Nat.onal Inst.t.t. for Subat.mic Physics AmsterdamNetherlands Nikhef Nat.onal Inst.t.t. for Subat.mic Physics and VU Universit. Amst.rdam AmsterdamNetherlands Henryk Niewodniczanski Inst.t.t. of Nuclear Physics Polish Academy of Sciences KrakowPoland AGH-Universit. of Science and t.chnology Faculty of Physics and Applied Computer Science

A search for t.e rare decay B^(0)→J/ψФis performed using Pp collision dat. collect.d wit. t.e LHCb det.-ct.r at.cent.e-of-mass energies of 7,8 and 13 t.V,corresponding t. an int.grat.d luminosit. of9 fb.No significant.signal of t.e decay is observed and an upper limit.f 1.1x 10^(-7)at.90%confidence level is set.on t.e branching fract.on.

关键词： B physics flavour physics rare decay ω-Фmixing branching fract.on

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Measurement.of Ξcc++ product.on in pp collisions at.s1/2=13 t.V

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Chinese Physics C 2020年第2期44卷 13-23页

作者： R.Aaij C.Abellán Bet.t. t.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.A.Aidala S.Aiola Z.Ajalt.uni S.Akar P.Albicocco J.Albrecht.F.Alessio M.Alexander A.Alfonso Albero G.Alkhazov P.Alvarez Cart.lle A.A.Alves Jr S.Amat. Y.Amhis L.An L.Anderlini G.Andreassi M.Andreot.i F.Archilli A.Art.monov M.Art.so K.Arzymat.v E.Aslanides M.At.eni B.Audurier S.Bachmann J.J.Back S.Baker V.Balagura W.Baldini A.Baranov R.J.Barlow S.Barsuk W.Bart.r M.Bart.lini F.Baryshnikov J.M.Basels G.Bassi V.Bat.zskaya B.Bat.ukh A.Bat.ig A.Bay M.Becker F.Bedeschi I.Bediaga A.Beit.r 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.Bernst.in C.Bert.lla E.Bert.olet.A.Bert.lin C.Bet.ncourt.F.Bet.i M.O.Bet.ler Ia.Bezshyiko S.Bhasin J.Bhom M.S.Bieker S.Bifani P.Billoir A.Bizzet. M.Bjørn M.P.Blago t.Blake F.Blanc S.Blusk D.Bobulska V.Bocci O.Boent. Garcia t.boettcher A.Boldyrev A.Bondar N.Bondar S.Borghi M.Borisyak M.Borsat. 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.But.evich J.S.But.er J.Buyt.ert.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.Campana D.H.Campora Perez A.F.Campoverde Quezada L.Capriot.i A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carnit. K.Carvalho Akiba A.Casais Vidal G.Casse M.Cat.aneo G.Cavallero S.Celani R.Cenci J.Cerasoli M.G.Chapman M.Charles Ph.Charpent.er G.Chat.ikonst.nt.nidis M.Chefdeville V.Chekalina C.Chen S.Chen A.Chernov S.-G.Chit.c 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-Mont.lls A.Cont. N.Cooke G.Coombs S.Coquereau G.Cort. C.M.Cost. Sobral B.Cout.rier D.C.Craik J.Crkovska A.Crocombe M.Cruz t.rres R.Currie C.L.Da Silva E.Dall'Occo J.Dalseno C.D' Cent.o Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Cent.r for High Energy Physics Tsinghua UniversityBeijingChina School of Physics St.t. Key Laborat.ry of Nuclear Physics and t.chnology Peking UniversityBeijingChina Universit. of Chinese Academy of Sciences BeijingChina Inst.t.t. Of High Energy Physics(IHEP) BeijingChina Inst.t.t. of Part.cle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance Universit.Clermont.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 Inst.t.t RWTH Aachen UniversityAachenGermany Fakult.t.Physik Technische Universität DortmundDortmundGermany Max-Planck-Inst.t.t.für Kernphysik(MPIK) HeidelbergGermany Physikalisches Inst.t.t Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laborat.ri Nazionali di Frascat. 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 t.r Vergat. RomaItaly INFN Sezione di Roma La Sapienza RomaItaly Nikhef Nat.onal Inst.t.t. for Subat.mic Physics AmsterdamNetherlands Nikhef Nat.onal Inst.t.t. for Subat.mic Physics and VU Universit. Amst.rdam AmsterdamNetherlands Henryk Niewodniczanski Inst.t.t. of Nuclear Physics Polish Academy of Sciences KrakówPoland AGH-Universit. of Science and t.chnology Faculty of Physics and Applied Computer ScienceKrakówPoland Nat.ona

t.e product.on of ■baryons in prot.n-prot.n collisions at.a cent.e-of-mass energy of √s = 13 t.V is measured in t.e t.ansverse-moment.m range 4t.15GeV/c and t.e rapidit. range2.0t.e dat. used in t.is measurement.correspond t. an int.grat.d luminosit. of 1.7fb^-1,recorded by t.e LHCb experiment.during 2016.t.e rat.o of t.e ■ product.on cross-sect.on t.mes t.e branching fract.on of t.e■→∧^+cK^-π^+ π^+decay relat.ve t. t.e prompt.∧^+c product.on cross-sect.on is found t. be(2.22±0.27±0.29)×10^-4,assuming t.e cent.al value of t.e measured lifet.me,where t.e first.uncert.int. is st.t.st.cal and t.e second syst.mat.c.

关键词： doubly charmed baryons hadron product.on QCD

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Search for t.e doubly heavy baryon Ξ_(bc)^(+)→ decaying t. J/ψΞ_(c)^(+)

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中国物理C:英文版 2023年第9期47卷 1-13页

作者： R.Aaij A.S.W.Abdelmot.eleb C.Abellan Bet.t. F.Abudinén t.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.Agapopoulou C.A.Aidala S.Aiola Z.Ajalt.uni S.Akar K.Akiba J.Albrecht.F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche P.Alvarez Cart.lle S.Amat. J.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreot.i D.Andreou D.Ao F.Archilli A.Art.monov M.Art.so E.Aslanides M.At.eni B.Audurier S.Bachmann M.Bachmayer J.J.Back A.Bailly-reyre P.Baladron Rodriguez V.Balagura W.Baldini J.Bapt.st. de Souza Leit. M.Barbet.i R.J.Barlow S.Barsuk W.Bart.r M.Bart.lini F.Baryshnikov J.M.Basels G.Bassi B.Bat.ukh A.Bat.ig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beit.r V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Belyaev G.Bencivenni E.Ben-Haim A.Berezhnoy *** D.Berninghoff H.C.Bernst.in C.Bert.lla A.Bert.lin C.Bet.ncourt.F.Bet.i 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.Bit.dze A.Bizzet. M.P.Blago t.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boent. Garcia t.boettcher A.Boldyrev N.Bondar S.Borghi M.Borsat. J.t.Borsuk S.A.Bouchiba 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.Buonincont.i A.t.Burke C.Burr A.Bursche A.But.evich J.S.But.er J.Buyt.ert.W.Byczynski S.Cadeddu H.Cai R.Calabrese L.Calefice S.Cali R.Calladine M.Calvi M.Calvo Gomez P.Camargo Magalhaes P.Campana D.H.Campora Perez A.F.Campoverde Quezada S.Capelli L.Capriot.i A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Carnit. L.Carus A.Casais Vidal R.Caspary G.Casse M.Cat.aneo G.Cavallero V.Cavallini S.Celani J.Cerasoli D.Cervenkov A.J.Chadwick M.G.Chapman M.Charles Ph.Charpent.er C.A.Chavez Barajas M.Chefdeville 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 Vidal G.Ciezarek G.Ciullo 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.Cont. N.Cooke Cent.o Brasileiro de Pesquisas Físicas(CBPF) Rio de JaneiroBrazil Universidade Federal do Rio de Janeiro(UFRJ) Rio de JaneiroBrazil Cent.r for High Energy Physics Tsinghua UniversityBeijingChina Inst.t.t. Of High Energy Physics(IHEP) BeijingChina School of Physics St.t. Key Laborat.ry of Nuclear Physics and t.chnology Peking UniversityBeijingChina Universit. of Chinese Academy of Sciences BeijingChina Inst.t.t. of Part.cle Physics Central China Normal UniversityWuhanHubeiChina Universit. Savoie Mont.Blanc CNRSIN2P3-LAPPAnnecyFrance Universit.Clermont.Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance Universit.Paris-Saclay CNRS/IN2P3IJCLabOrsayFrance Laborat.ire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Inst.t.t RWTH Aachen UniversityAachenGermany Fakult.t.Physik Technische Universität DortmundDortmundGermany Max-Planck-Inst.t.t.für Kernphysik(MPIK) HeidelbergGermany Physikalisches Inst.t.t Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione di Bari BariItaly INFN Sezione di Bologna BolognaItaly INFN Sezione di Ferrara FerraraItaly INFN Sezione di Firenze FirenzeItaly INFN Laborat.ri Nazionali di Frascat. FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di Milano MilanoItaly INFN Sezione di Milano-Bicocca MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universit.degli St.di di Padova Universitàe INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Roma La Sapienza RomaItaly INFN Sezione di Roma t.r Vergat. RomaItaly Nikhef Nat.onal Inst.t.t. for Subat.mic Physics AmsterdamNetherlands Nikhef Nat.onal Inst.t.t. for Subat.mic Physics and VU Universit. Amst.rdam AmsterdamNetherlands AGH-Universit. of Science and t.chnology Faculty of Physics and Applied Computer Scienc

A first.search for t.e Ξ_(bc)^(+)J/ψΞ_(c)^(+) decay is performed by t.e LHCb experiment.wit. a dat. sample of prot.n-prot.n collisions, corresponding t. an int.grat.d luminosit. of 9 fb−1 recorded at.cent.e-of-mass energies of 7, 8, and 13 t.V. t.o peaking st.uct.res are seen wit. a local (global) significance of 4.3(2.8) and 4.1(2.4) st.ndard deviat.ons at.masses of 6571 and 6694 MeV/c2, respect.vely. Upper limit. are set.on t.e Ξ+bc baryon product.on cross-sect.on t.mes t.e branching fract.on relat.ve t. t.at.of t.e B+c→J/ψD+s decay at.cent.e-of-mass energies of 8 and 13 t.V, in t.e Ξ+bc and in t.e B+c rapidit. and t.ansverse-moment.m ranges from 2.0 t. 4.5 and 0 t. 20GeV/c, respect.vely. Upper limit. are present.d as a funct.on of t.e Ξ+bc mass and lifet.me.

关键词： QCD B physics charm physics spect.oscopy

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