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

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.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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CEPC Tech.ical Design Report

引用

Radiation Detection Tech.ology and Meth.ds 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah.Tiago Carlos Adorno de Freitas Konstantin Afanaciev Sh.keel Ah.ad Ijaz Ah.ed Xiaocong Ai Abid Aleem Wolfgang Altmannsh.fer Fabio Alves Weiming An Rui An Daniele Paolo Anderle Stefan Antusch.Yasuo Arai Andrej Arbuzov Abdesslam Arh.ib Mustafa Ash.y Sh. Bai Yu Bai Yang Bai Vipul Bairath. Csaba Balazs Ph.lip Bambade Yong Ban Tripamo Bandyopadh.ay Sh.u-Sh.n Bao Desmond P.Barber Ayse Bat Varvara Batozskaya Subash.Ch.ndra Beh.ra Alexander Belyaev Mich.le Bertucci Xiao-Jun Bi Yuanjie Bi Tianjian Bian Fabrizio Bianch. Th.mas Biekotter Mich.la Biglietti Sh.lva Bilanish.ili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukh.ri Vladimir Bytev Giacomo Cacciapaglia h.a Cai Wenyong Cai Wujun Cai Yijian Cai Yizh.u Cai Yuch.n Cai h.iying Cai h.ach.ng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jiansh. Cao Antoine Ch.nce Xuejun Ch.ng Yue Ch.ng Zh. Ch.ng Xinyuan Ch.ng Wei Ch.o Auttakit Ch.trabh.ti Yimin Ch. Yuzh. Ch. Bin Ch.n Danping Ch.n Fuqing Ch.n Fusan Ch.n Gang Ch.n Guoming Ch.n h.a-Xing Ch.n h.irun Ch.n Jinh.i Ch.n Ji-Yuan Ch.n Kai Ch.n Mali Ch.n Mingjun Ch.n Mingsh.i Ch.n Ning Ch.n Sh.nh.ng Ch.n Sh.nzh.n Ch.n Sh.o-Long Ch.n Sh.omin Ch.n Sh.qiang Ch.n Tianlu Ch.n Wei Ch.n Xiang Ch.n Xiaoyu Ch.n Xin Ch.n Xun Ch.n Xurong Ch.n Ye Ch.n Ying Ch.n Yukai Ch.n Zelin Ch.n Zilin Ch.n Gang Ch.n Boping Ch.n Ch.nh.i Ch.n h.k Ch.en Ch.ng h.ajie Ch.ng Sh.n Ch.ng Tongguang Ch.ng Yunlong Ch. Pietro Ch.menti Wen h.n Ch.u Guk Ch. Ming-Ch.ng Ch. Xiaotong Ch. Ziliang Ch. Guglielmo Coloretti Andreas Crivellin h.nh.a Cui Xiaoh.o Cui Zh.oyuan Cui Brunella D'Anzi Ling-Yun Dai Xinch.n Dai Xuwen Dai Antonio De Maria Nicola De Filippis Ch.istoph. De La Taille Francesca De Mori Ch.ara De Sio Elisa Del Core Sh.angxue Deng Wei-Tian Deng Zh. Deng Ziyan Deng Bh.pal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding h.iyi Dong Jianin AGh.University of Science and Tech.ology Faculty of Physics and Applied Computer ScienceKrakow Anh.i University HefeiAnhui Applied Ph.sics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras h.ndu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beih.ng University Beijing Beijing Computational Science Research.Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research.Institute Co. LtdBeijing Beijing Institute of Tech.ology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Ph.sics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Th.ory and Computation National Tsing Hua UniversityHsinchu Central Ch.na Normal University WuhanHubei Central South.University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Ch.ngdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan Ch.na academy of engineering ph.sics MianyangSichuan Ch.na building materials academy Beijing Ch.na Center of Advanced Science and Tech.ology Beijing Ch.na Institute of Atomic Energy Beijing Ch.na Jiliang University HangzhouZhejiang Ch.na Nuclear Instrument CO. LTDBeijing Ch.na University of Geosciences Beijing Ch.na University of Geosciences WuhanHubei Ch.na University of Mining and Tech.ology XuzhouJiangsu Ch.na West Normal University NanchongSichuan Ch.ngqing University Department of PhysicsChongqing Ch.lalongkorn University Bangkok City University of h.ng Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPh.&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Tech.ology Department of PhysicsDalian Deutsch.s Elektronen-Synch.otron DESY Hamburg Dzh.lepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research.DLNP JINR) Dubna East Ch.na University Of Science And Tech.ol

Th. Circular Electron Positron Collider(CEPC)is a large scientific project initiated and h.sted by Ch.na,fostered th.ough.extensive collaboration with.international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of ach.eving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,h.and tt).Th. Linac and Damping Ring are situated on th. surface,wh.le th. subterranean Booster and Collider are h.used in a 100 km circumference underground tunnel,strategically accommodating future expansion with.provisions for a potential Super Proton Proton Collider(SPPC).Th. CEPC primarily serves as a h.ggs *** its baseline design with.synch.otron radiation(SR)power of 30 MW per beam,it can ach.eve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million h.ggs *** th. SR power to 50 MW per beam expands th. CEPC's capability to generate 4.3 million h.ggs bosons,facilitating precise measurements of h.ggs coupling at sub-percent levels,exceeding th. precision expected from th. h.-Lh. by an order of *** Tech.ical Design Report(TDR)follows th. Preliminary Conceptual Design Report(Pre-CDR,2015)and th. Conceptual Design Report(CDR,2018),compreh.nsively detailing th. mach.ne's layout,performance metrics,ph.sical design and analysis,tech.ical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establish.ng a framework for forth.oming engineering design ph.se and site selection *** is anticipated to begin around 2027-2028,pending government approval,with.an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in th. mid-2030s.

关键词： initiated exceeding precise

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