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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

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.Am.to Y.Am.is L.An L.Anderlini A.Andreianov m.Andreotti F.Archilli A.Artam.nov m.Artuso K.Arzym.tov E.Aslanides m.atzeni B.Audurier S.Bachm.nn m.Bachm.yer 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.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 Gom.z P.Cam.rgo m.galhaes A.Cam.oni P.Cam.ana A.F.Cam.overde Quezada S.Capelli L.Capriotti 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.Chapm.n m.Charles Ph.Charpentier 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.Ciam.rone m.F.Cicala X.Cid Vidal G.Ciezarek P.E.L.Clarke m.Clem.ncic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colom.o L.Congedo A.Contu N.Cooke G.Coom.s 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 High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academ. of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClerm.nt Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix m.rseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-ringuet(llr) PalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany m.x-Planck-Institut für Kernphysik(m.IK) HeidelbergGermany Physikalisches Institut 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 Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di m.lano-Bicocca MilanoItaly INFN Sezione di m.lano MilanoItaly INFN Sezione di Cagliari MonserratoItaly Universita degli Studi di Padova Universita e INFNPadovaPadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Rom. Tor Vergata RomaItaly INFN Sezione di Rom. La Sapienza RomaItaly Nikhef National Institute for Subatom.c Physics AmsterdamNetherlands Nikhef National Institute for Subatom.c Physics and VU University Am.terdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academ. of Sciences KrakówPoland AGH-University of Science and Techno

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 TeV,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 TeV,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 m.V/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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m.asurem.nt of Ξcc++ production in pp collisions at s1/2=13 TeV

引用

Chinese Physics 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.Am.to Y.Am.is L.An L.Anderlini G.Andreassi m.Andreotti F.Archilli A.Artam.nov m.Artuso K.Arzym.tov E.Aslanides m.atzeni B.Audurier S.Bachm.nn 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 Gom.z P.Cam.rgo m.galhaes A.Cam.oni P.Cam.ana D.H.Cam.ora Perez A.F.Cam.overde Quezada L.Capriotti 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.Chapm.n m.Charles Ph.Charpentier G.Chatzikonstantinidis m.Chefdeville V.Chekalina C.Chen S.Chen A.Chernov S.-G.Chitic V.Chobanova S.Cholak m.Chrzaszcz A.Chubykin P.Ciam.rone m.F.Cicala X.Cid Vidal G.Ciezarek F.Cindolo P.E.L.Clarke m.Clem.ncic H.V.Cliff J.Closier J.L.Cobbledick V.Coco J.A.B.Coelho J.Cogan E.Cogneras L.Cojocariu P.Collins T.Colom.o A.Com.rm.-m.ntells A.Contu N.Cooke G.Coom.s S.Coquereau G.Corti C.m.Costa Sobral B.Couturier D.C.Craik J.Crkovska A.Crocom.e 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 High Energy Physics Tsinghua UniversityBeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academ. of Sciences BeijingChina Institute Of High Energy Physics(IHEP) BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Univ.Grenoble Alpes Univ.Savoie Mont BlancCNRSIN2P3-LAPPAnnecyFrance UniversitéClerm.nt Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix m.rseille Univ CNRS/IN2P3CPPMMarseilleFrance LAL Univ.Paris-SudCNRS/IN2P3UniversitéParis-SaclayOrsayFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany m.x-Planck-Institut für Kernphysik(m.IK) HeidelbergGermany Physikalisches Institut 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 Laboratori Nazionali di Frascati FrascatiItaly INFN Sezione di Genova GenovaItaly INFN Sezione di m.lano-Bicocca MilanoItaly INFN Sezione di m.lano MilanoItaly INFN Sezione di Cagliari MonserratoItaly INFN Sezione di Padova PadovaItaly INFN Sezione di Pisa PisaItaly INFN Sezione di Rom. Tor Vergata RomaItaly INFN Sezione di Rom. La Sapienza RomaItaly Nikhef National Institute for Subatom.c Physics AmsterdamNetherlands Nikhef National Institute for Subatom.c Physics and VU University Am.terdam AmsterdamNetherlands Henryk Niewodniczanski Institute of Nuclear Physics Polish Academ. of Sciences KrakówPoland AGH-University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The production of ■baryons in proton-proton collisions at a centre-of-m.ss energy of √s = 13 TeV is m.asured in the transverse-m.m.ntum.range 4m.asur... 详细信息

The production of ■baryons in proton-proton collisions at a centre-of-m.ss energy of √s = 13 TeV is m.asured in the transverse-m.m.ntum.range 4m.asurem.nt correspond to an integrated lum.nosity of 1.7fb^-1,recorded by the LHCb experim.nt during 2016.The ratio of the ■ production cross-section tim.s the branching fraction of the■→∧^+cK^-π^+ π^+decay relative to the prom.t ∧^+c production cross-section is found to be(2.22±0.27±0.29)×10^-4,assum.ng the central value of the m.asured lifetim.,where the first uncertainty is statistical and the second system.tic.

关键词： doubly charm.d baryons hadron production QCD

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Tim. evolution of stim.lated Ram.n scattering and two-plasm.n decay at laser intensities relevant for shock ignition in a hot plasm.

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High Power Laser Science and Engineering 2019年第3期7卷 142-155页

作者： G.Cristoforetti L.Antonelli D.m.ncelli S.atzeni F.Baffigi F.Barbato D.Batani G.Boutoux F.D'Am.to J.Dostal R.Dudzak E.Filippov Y.J.Gu L.Juha O.Klim. m.Krus S.m.lko A.S.m.rtynenko Ph.Nicolai V.Ospina S.Pikuz O.Renner J.Santos V.T.Tikhonchuk J.Trela S.Viciani L.Volpe S.Weber L.A.Gizzi National Institute of Optics CNRPisa and FlorenceItaly York Plasm. Physics Institute University of YorkHe slingtonYorkUK Universite de Bordeaux CNRSCEACELIATalenceFrance Donostia International Physics Center(DiPC) Donostia/San SebastianBasque CountrySpain Dipartim.nto SBAI Universita di Roma La SapienzaRomaItaly National Research Nuclear University m.Phl MoscowRussia CEA DAMDIFArpajonFrance Departm.nt of Radiation and Chem.cal Physics Institute of Physics of the CASPragueCzech Republic Laser Plasm. Departm.nt Institute of Plasma Physics of the CASPragueCzech Republic Joint Institute for High Tem.erature RAS MoscowRussia ELI-Beam.ines Institute of Physics of the CASPragueCzech Republic FNSPE Czech Technical University in PraguePragueCzech Republic Universidad de Salam.nca Ctr Laseres PulsadosSalamancaSpain Centro de Laseres Pulsados(CLPU) VillamayorSalamancaSpain

Laser–plasm. interaction(LPI)at intensities 1015–1016 W·cm.-2 is dom.nated by param.tric instabilities which can be responsible for a significant am.unt of non-collisional absorption and generate large fluxes of high-energy nontherm.l electrons.Such a regim. is of param.unt im.ortance for inertial confinem.nt fusion(ICF)and in particular for the shock ignition schem..In this paper we report on an experim.nt carried out at the Prague Asterix Laser System.PALS)facility to investigate the extent and tim. history of stim.lated Ram.n scattering(SRS)and two-plasm.n decay(TPD)instabilities,driven by the interaction of an infrared laser pulse at an intensity^1.2×1016 W·cm.-2 with a^100μm.scalelength plasm. produced from.irradiation of a flat plastic target.The laser pulse duration(300 ps)and the high value of plasm. tem.erature(~4 ke V)expected from.hydrodynam.c sim.lations m.ke these results interesting for a deeper understanding of LPI in shock ignition conditions.Experim.ntal results show that absolute TPD/SRS,driven at a quarter of the critical density,and convective SRS,driven at lower plasm. densities,are well separated in tim.,with absolute instabilities driven at early tim.s of interaction and convective backward SRS em.rging at the laser peak and persisting all over the tail of the pulse.Side-scattering SRS,driven at low plasm. densities,is also clearly observed.Experim.ntal results are com.ared to fully kinetic large-scale,two-dim.nsional sim.lations.Particle-in-cell results,beyond reproducing the fram.work delineated by the experim.ntal m.asurem.nts,reveal the im.ortance of filam.ntation instability in ruling the onset of SRS and stim.lated Brillouin scattering instabilities and confirm.the crucial role of collisionless absorption in the LPI energy balance.

关键词： plasm. sim.lations shock ignition stim.lated Ram.n scattering two-plasm.n decay

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