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贵州大文剖面牙形类生物地层学及其对二叠纪末生物灭绝事件的指示意义

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贵州大文剖面牙形类生物地层学及其对二叠纪末生物灭绝事件的指示...

广西来宾瓜达鲁普统-乐平统界线地层的牙形类化石—一个独立验证报告(英文)

中国古生物学会第十次全国会员代表大会暨第25届学术年会——纪念中国古生物学会成立80周年

作者：陈军 BEATTY Tyler W henderson charles M ROWE Harry 中国科学院南京地质古生物研究所现代古生物学和地层学国家重点实验室 Department of Geoscience University of Calgary2500 University DriveNW CalgaryAlbertaCanada T2N 1N4 Department of Geological Sciences University of KentuckyLexingtonKY 40506USA

在晚二叠世—早三叠世过渡时期,扬子地台东南缘、南盘江盆地内发育多个浅海碳酸盐台地,包括贵州南部的"大贵州滩"(Great Bank ofGuizhou,GBG)以及广西南部的德宝台地、平果台地和崇左台地。本次研究选择位于南盘江盆地北缘,贵州省罗甸... 详细信息

在晚二叠世—早三叠世过渡时期,扬子地台东南缘、南盘江盆地内发育多个浅海碳酸盐台地,包括贵州南部的"大贵州滩"(Great Bank ofGuizhou,GBG)以及广西南部的德宝台地、平果台地和崇左台地。本次研究选择位于南盘江盆地北缘,贵州省罗甸县边阳—板庚地区的大文剖面,进行了详细的牙形类及同位素地球化学样品采集、分析。实测剖面下部为上二叠统吴家坪组的泥粒灰岩与颗粒灰岩,所含化石种类

关键词： Hindeodus parvus 牙形类二叠-三叠系界线大文剖面贵州

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微体古生物学报 2001年第2期18卷 122-132页

作者：查尔斯M.亨得森加拿大卡尔加里大学地质与地球物理系

王成源 (Wang,2 0 0 0 )和金玉 (Jin,2 0 0 0 )提出了关于乐平统底界定义的不同论点。为了对此进行独立的验证 ,卡尔加里大学微体古生物实验室对采自华南广西来宾地区瓜达鲁普统 -乐平统界线地层的牙形类化石大块样品进行了处理。结... 详细信息

王成源 (Wang,2 0 0 0 )和金玉 (Jin,2 0 0 0 )提出了关于乐平统底界定义的不同论点。为了对此进行独立的验证 ,卡尔加里大学微体古生物实验室对采自华南广西来宾地区瓜达鲁普统 -乐平统界线地层的牙形类化石大块样品进行了处理。结果如下 :***和 Clarkina在样品中没有共生 ;2 .由 Jinogondolella granti演化为Clarkina postbitteri 的变化发生在层 115 - 6 i;*** 的首次出现层位 (FAD)在蓬莱滩剖面位于层 115 - 6 i上部 ;4.这个变化标志着一个显著的生物信号和一个重要的点断演化事件。Jinogondolella granti演化为 Clarkinapostbitteri的事件很可能是受瓜达鲁普统与乐平统之交的海平面降至最低水位所触发和控制。层 115 - 6 i下部为较浅水相颗粒灰岩 ,代表瓜达鲁普统末期层序高位域之顶或上覆层序低位域之底部。作为 Clarkina属的第一个代表 ,Clarkina postbitteri是界线地层中最易识别的种之一 ,而 Clarkina postbitteri带的识别较容易和稳定一致。Clarkinapostbitteri和 Clarkina dukouensis可以通过基于锯齿型式 ,居群和个体发育的分类体系来加以稳定地区分。Clarki-na p ostbitteri和 Clarkina dukouensis之间的过渡是渐变的 ,其间的分界点只能人为地确定。

关键词：牙形类化石界红层型瓜达鱼普统乐平统蓬莱滩剖面广西来宾

Influence of COM-peptides/proteins on the properties of flocs formed at different shear rates

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Journal of Environmental Sciences 2019年第6期31卷 116-127页

作者： Monika Filipenska Petra Vasatova Lenka Pivokonska Lenka Cermakova andrea Gonzalez-Torres Rita K.henderson Jana Naceradska Martin Pivokonsky Institute of Hydrodynamics of the Czech Academy of Sciences Institute for Environmental Studies Faculty of Science Charles University The bioMASS Lab School of Chemical Engineering The University of New South Wales

Coagulation followed by floc separation is a key process for the removal of algal organic matter(AOM) in water treatment. Besides optimizing coagulation parameters,knowledge of the properties of AOM-flocs is essential to maximizing AOM ***, the impact of AOM on the floc properties remains unclear. This study investigated how peptides/proteins derived from the cellular organic matter(COM) of the cyanobacterium Microcystis aeruginosa influenced the size, structure, and shape of flocs formed at different shear rates(G). Flocs formed by kaolinite, COM-peptides/proteins and a mixture of the same were studied, and the effect of intermolecular interactions between floc components on floc properties was assessed. The coagulation experiments were performed in a Taylor–Couette reactor, with aluminum(Al) or ferric sulphate(Fe) utilized as coagulants. Image analysis was performed to gauge floc size and obtain data on fractal dimension. It was found that floc properties were affected by the presence of the COM-peptides/proteins and the coagulant used. COM-peptides/proteins increased floc size and porosity and widened floc size distributions. The Fe coagulant produced larger and less compact flocs than Al coagulant. Moreover, the decrease in floc size that occurred in parallel with increase in shear rate was not smooth in progress. A rapid change for the kaolinite-coagulant suspension and two rapid changes for the suspensions containing COM were observed. These were attributed to various intermolecular interactions between floc components participating in coagulation at different G. Based on the results obtained, shear rates suitable for efficient separation of flocs containing COM were suggested.

关键词： Algal organic matter Floc size Coagulation Image analysis Water treatment

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美国住院药师培养模式及现状介绍

中国医院药学杂志 2009年第19期29卷 1663-1666页

作者：刘新月王强梅丹 Roger D.Lander charles C.Sands Robert P.henderson 中国医学科学院北京协和医学院药剂科北京100730 Samford University Mc Whorter School of Pharmacy

目的:通过了解美国住院药师培养项目,促进我国的住院药师培养制度的成熟和规范化。方法:参考美国医疗机构药师协会和美国临床药学学会发布的文件,结合在美国学习临床药学服务的经历。结果:美国住院药师培养模式以有组织、有导向性和经... 详细信息

目的:通过了解美国住院药师培养项目,促进我国的住院药师培养制度的成熟和规范化。方法:参考美国医疗机构药师协会和美国临床药学学会发布的文件,结合在美国学习临床药学服务的经历。结果:美国住院药师培养模式以有组织、有导向性和经认证的毕业后项目为基础。2008年美国共有住院药师培养项目460个,提供约2000个培训岗位。结论:我国应将国内医院药学发展实际和美国的成功经验相结合,完善住院药师培养制度,培养临床药学人才。

关键词：美国住院药师培养药学教育认证

Characterizing microlensing planetary system OGLE-2014-BLG-0676Lb with adaptive optics imaging

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Research in Astronomy and Astrophysics 2021年第12期21卷 357-364页

作者： Xiao-Jia Xie Subo Dong Yossi Shvartzvald Andrew Gould Andrzej Udalski Jean-Philippe Beaulieu charles Beichman Laird Miller Close Calen Bhenderson Jared RMales Jean-Baptiste Marquette Katie MMorzinski Christopher RGelino Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy Peking UniversityBeijing 100871China Department of Particle Physics and Astrophysics Weizmann Institute of ScienceRehovot 76100Israel Department of Astronomy Ohio State University140 W.18th AvenueColumbusOH 43210USA Max-Planck-Institute for Astronomy Koigstuhl 17D-69117 HeidelbergGermany Astronomical Observatory University of WarsawAl.Ujazdowskie 400-478 WarszawaPoland School of Natural Sciences University of TasmaniaPrivate Bag 37 HobartTasmania 7001Australia Sorbonne Universite UPMC Universite Paris 6 et CNRSUMR 7095Institut d'Astrophysique de Paris98 bis Bd AragoF-75014 ParisFrance Jet Propulsion Laboratory California Institute of Technology4800 Oak Grove DrivePasadenaCA 91109USA Caltech/IPAC-NASA Exoplanet Science Institute 770 S.Wilson AvePasadenaCA 91106USA Steward Observatory University of ArizonaTucsonAZ 85721USA IPAC Mail Code 100-22Caltech1200 East California BoulevardPasadenaCA 91125USA Laboratoire d'Astrophysique de Bordeaux Univ.BordeauxCNRSB18Nallee Geoffroy Saint-HilaireF-33615 FessacFrance

We constrain the host-star flux of the microlensing planet OGLE-2014-BLG-0676 Lb using adaptive optics(AO)images taken by the Magellan and Keck *** measure the flux of the light blended with the microlensed source to be K=16.79±0.04 mag and J=17.76±0.03 *** that the blend is the lens star,we find that the host is a 0.73_(-0.29)^(+0.14)M_(⊙)star at a distance of2.67_(-1.41)^(+0.77)kpc,where the relatively large uncertainty in angular Einstein radius measurement is the major source of *** mass of M_(p)=3.68_(-1.44)^(+0.69)M_J,the planet is likely a"super Jupiter"at a projected separation of r_(⊥)=4.53_(-2.50)^(+1.49)AU,and a degenerate model yields a similar M_p=3.73_(-1.47)^(+0.73)M_(J)at a closer separation of r_(⊥)=2.56_(-1.41)^(+0.84)*** estimates are consistent with the previous Bayesian analysis based on a Galactic ***-2014-BLG-0676 Lb belongs to a sample of planets discovered in a"secondgeneration"planetary microlensing survey and we attempt to systematically constrain host properties of this sample with high-resolution imaging to study the distribution of planets.

关键词： gravitational lensing:micro instrumentation:adaptive optics instrumentation:high angular resolution (stars:)planetary systems

Reporter Genes: A Practical Guide (Methods in Molecular Biology) 1

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老年患者行非心脏手术前红细胞压积水平与手术预后的关系

丛书名： Methods in Molecular Biology 411

2007年

作者： Siobhan Loughna and Deborah henderson Philip A. Seymour and Maike Sander Maria Limberis Peter Bell and James M. Wilson Wolfgang J. Weninger and Timothy J. Mohun George H. Patterson Karin Edoff James S. Dods and Andrea H. Brand charles G. Bailey and

ISBN: (纸本)9781588297396

Reporter genes have played, and continue to play, a vital role in many areas of biological research by providing a ready means for qualitative and quantitative assessment of the activity of genes and location of gene products in different environments. This book describes practical protocols for experimentation with the most useful reporter genes for mammalian systems that are available

关键词： Genes Reporter

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美国医学会杂志（中文版） 2008年第1期27卷 9-16页

作者： Wen-Chih Wu, MD Tracy L. Schifftner, MS William G. henderson, PhD charles B. Eaton, MD Roy M. Poses, MD Georgette Uttley, RN Satish C. Sharma, MD 1 Michael Vezeridis, MD Shukri F. Khuri, MD Peter D. Friedmann, MD 公磊(译) 祝学光(校) Target Research Enhancement Program Providence Veterans Affairs Medical Center and Department of Community Health Department of Medicine Memorial Hospital of Rhode Island and Department of Family Medicine Center for Primary Care and Prevention Memorial Hospital of Rhode Island and Department of Family Medicine Center for Primary Care and Prevention and Surgical Service Providence Veterans Affairs Medical Center and Department of Surgery Brown Medical School and Medical Service Providence Veterans Affairs Medical Center Providence RI National Surgical Quality Improvement Program Denver Data Analysis Center Denver VA Medical Center University of Colorado Health Outcomes ProgramDenver Providence RI National Surgical Quality Improvement Program Denver Data Analysis Center and Surgical Service VA Boston Healthcare System and Department of Surgery Harvard Medical School Boston Mass 不详

背景：接受非心脏手术的老年患者出现红细胞压积异常和心血管并发症的危险较高。尽管患者术前几乎都要进行红细胞压积筛查，但是有关术前贫血及红细胞增多症的不良影响的证据较为有限。目的：于实施非心脏大手术的退伍老兵中评估术前贫... 详细信息

背景：接受非心脏手术的老年患者出现红细胞压积异常和心血管并发症的危险较高。尽管患者术前几乎都要进行红细胞压积筛查，但是有关术前贫血及红细胞增多症的不良影响的证据较为有限。目的：于实施非心脏大手术的退伍老兵中评估术前贫血和红细胞增多症的发生率及其对术后30天预后的影响。设计：利用全国退伍军人事务委员会（VA）于术质量改进计划数据库进行回顾性队列研究。根据术前红细胞压积水平将患者分为三类：贫血（红细胞压积〈39．0％）、正常（红细胞压积39．0％～53．9％）和红细胞增多症（红细胞压积≥54％）。对红细胞压积异常与术后30天心血管事件发生率及死亡率的关系进行评估。地点及患者：纳入1997至2004年于全美132个退伍军人医疗中心接受非心脏大手术的310311例患者（年龄≥65岁）。主要观测指标：主要观测指标为术后30天死亡率，次要观测指标包括术后30天死亡率或心脏事件（心脏骤停或Q波心肌梗死）发生率。结果：与红细胞压积正常者相比，红细胞压积发生正向或负向偏离者术后30天死亡率和心脏事件发生率均有所增加。研究发现，红细胞压积水平较正常范围每增减1个百分点，术后30天死亡率就可增加1．6％（95％可信区间，1．1％-2．2％）。进一步分析显示，当红细胞压积降至39％以下或超过51％时，校正后30天死亡风险和心脏病患病风险就开始增加。结论：接受非心脏大手术的老年患者（绝大多数为男性退伍军人）术前轻度贫血及红细胞增多症均可增加术后发生死亡和心脏事件的危险。今后的研究应明确上述发现可否见于其他人群，明确术前纠正贫血和红细胞增多症能否降低术后死亡风险。

关键词：红细胞压积非心脏手术老年患者手术预后手术前积水退伍军人医疗中心红细胞增多症

Search for the 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.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi P.Adlarson H.Afsharnia C.Agapopoulou C.A.Aidala Z.Ajaltouni S.Akar K.Akiba J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche P.Alvarez Cartelle R.Amalric S.Amato J.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer 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.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bedeschi I.B.Bediaga A.Beiter 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.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker N.V.Biesuz S.Bifani P.Billoir A.Biolchini M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.P.Blago T.Blake F.Blanc J.E.Blank S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev C.S.Bolognani R.Bolzonella N.Bondar F.Borgato S.Borghi M.Borsato 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.Buonincontri A.T.Burke C.Burr A.Bursche 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.Chadwick M.G.Chapman M.charles Ph.Charpentier 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 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 Institute Of High Energy Physics(IHEP) BeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Physik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione 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 Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer Scienc

A search for the rare decays W^(+)→D_(s)^(+)γ and Z→D0γis performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13TeV,corresponding to an integrated luminosity of 2.0fb−*** significant signal is observed for either decay mode and upper limits on their branching 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 the W^(+)→D_(s)^(+)γ and Z→D^(0)γ decay modes,*** is the first reported search for the Z→D^(0)γ decay,while the upper limit on the W+→D+sγbranching fraction improves upon the previous best limit.

关键词： W/Z boson rare decay upper limit of branching fraction

Search for the doubly heavy baryon Ξ_(bc)^(+)→ decaying to 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.Abdelmotteleb C.Abellan Beteta F.Abudinén T.Ackernley B.Adeva M.Adinolfi H.Afsharnia C.Agapopoulou C.A.Aidala S.Aiola Z.Ajaltouni S.Akar K.Akiba J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche P.Alvarez Cartelle S.Amato J.L.Amey Y.Amhis L.An L.Anderlini M.Andersson A.Andreianov M.Andreotti D.Andreou D.Ao F.Archilli A.Artamonov M.Artuso E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmayer 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.Baryshnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay A.Beck M.Becker F.Bedeschi I.B.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 A.Bertolin C.Betancourt F.Betti Ia.Bezshyiko S.Bhasin J.Bhom L.Bian M.S.Bieker N.V.Biesuz S.Bifani P.Billoir A.Biolchini M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldyrev N.Bondar S.Borghi M.Borsato 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.Buonincontri A.T.Burke C.Burr A.Bursche 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 Magalhaes 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.Chadwick M.G.Chapman M.charles Ph.Charpentier 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.Contu N.Cooke 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 Institute Of High Energy Physics(IHEP) BeijingChina School of Physics State Key Laboratory of Nuclear Physics and Technology Peking UniversityBeijingChina University of Chinese Academy of Sciences BeijingChina Institute of Particle Physics Central China Normal UniversityWuhanHubeiChina Université Savoie Mont Blanc CNRSIN2P3-LAPPAnnecyFrance UniversitéClermont Auvergne CNRS/IN2P3LPCClermont-FerrandFrance Aix Marseille Univ CNRS/IN2P3CPPMMarseilleFrance UniversitéParis-Saclay CNRS/IN2P3IJCLabOrsayFrance Laboratoire Leprince-Ringuet CNRS/IN2P3Ecole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Physikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Physik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphysik(MPIK) HeidelbergGermany Physikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Physics University College DublinDublinIreland INFN Sezione 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 Nikhef National Institute for Subatomic Physics AmsterdamNetherlands Nikhef National Institute for Subatomic Physics and VU University Amsterdam AmsterdamNetherlands AGH-University of Science and Technology Faculty of Physics and Applied Computer Scienc

A first search for the Ξ_(bc)^(+)J/ψΞ_(c)^(+) decay is performed by the LHCb 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 the Ξ+bc baryon production cross-section times the branching fraction relative to that of the B+c→J/ψD+s decay at centre-of-mass energies of 8 and 13 TeV, in the Ξ+bc and in the 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 the Ξ+bc mass and lifetime.

关键词： QCD B physics charm physics spectroscopy