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In situ and operando infrared spectroscopy.of battery.sy.tems:Progress and opportunities

能源化学:英文版 2023年第6期81卷 472-491,I0011页

作者： Murilo M.amaral Carla G.Real Victor y.y.kuhiro Gustavo Doubek Pablo S.Fernandez Gurpreet Singh Hudson Zanin Advanced Energy.Storage Division Center for Innovation on New EnergiesSchool of Electrical and Computer EngineeringUniversity of CampinasCampinasSP 13083-852Brazil Alan Levin Department of Mechanical and Nuclear Engineering Kansas State UniversityManhattanKS 66506USA Chemistry.Institute Center for Innovation on New EnergiesUniversity of CampinasCampinasSP 13083-970Brazil Advanced Energy.Storage Division Center for Innovation on New EnergiesSchool of Chemical EngineeringUniversity of CampinasCampinasSP 13083-852Brazil

In situ and operando infrared spectroscopies are powerful techniques to support the design of novel materials for batteries and the development of new battery.sy.tems.These techniques can support the study.of batteries by.identify.ng the formation of new species and monitoring electrochemical energy.stability.However,few works have employ.d these techniques,which can be used to investigate various materials,including sy.tems bey.nd lithium-ion technology.in the research of batteries.Therefore,this review presents a comprehensive overview focusing on the main contributions of in situ and operando infrared spectroscopy.for lithium-ion batteries(LIBs)and other battery.sy.tems.These techniques can successfully.identify.the formation of species during the electroly.e reduction,electrode degradation,and the formation of the solid-electroly.e interphase(SEI)lay.r.From these outcomes,it is possible to conclude that this characterization approach should be employ.d as a protocol to overcome remaining issues in batteries,consequently.supporting battery.research.This review aims to be a guide on how infrared spectroscopy.can contribute to monitoring battery.sy.tems and to lead researchers interested in apply.ng this technique.

关键词： In situ spectroscopy Operando spectroscopy FTIR Spectro-electrochemical cells Batteries

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Direct observation of the CO_(2) formation and C–H consumption of carbon electrode in an aqueous neutral electroly.e supercapacitor by.in-situ FTIR and Raman

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Journal of Energy.Chemistry 2022年第8期31卷 488-496,I0013页

作者： Murilo M.amaral Victor y.y.kuhiro Rafael Vicentini Alfredo C.Peterlevitz Leonardo M.Da Silva Pablo Fernandez Hudson Zanin Advanced Energy.Storage Division State University of Campinas13083-852Av.Albert Einsten 400CampinasSPBrazil Chemistry.Institute State University of Campinas13083-970Josue de Castro StreetCampinasSPBrazil Department of Chemistry Laboratory of Fundamental and Applied ElectrochemistryFederal University of Jequitinhonha and Mucuri’s ValleyRodovia MGT 367km 5835000Alto da Jacuba39100-000DiamantinaMGBrazil Center for Innovation on New Energies University of Campinas13083-841 CampinasSão PauloBrazil

Electrical double-lay.r capacitors(EDLCs)consist of energy.storage devices that present high-power and moderate energy.density.The electroly.e and electrode phy.icochemical properties are crucial for improving their overall energy.storage capabilities.Therefore,the stability.of the EDLCs’materials is the primary.focus of this study.Since energy.storage depends on the specific capacitance,and also on the square of the maximum capacitive cell voltage(UMCV).Thus,electrodes with high specific surface area(SSA)and electroly.es with excellent electrochemical stability.are commonly.reported in the literature.Aqueous electroly.es are safer and green devices compared to other organic-based solutions.On the other hand,their UMCVis reduced compared to other electroly.es(e.g.,organic-based and ionic liquids).In this sense,spanning the UMCVfor aqueous-based electroly.es is a’hot topic’research.Unfortunately.the lack of protocols to establish reliable UMCVvalues has culminated in the publishing of several conflicting results.Herein,we confirm that multiwalled carbon nanotubes(MWCNTs)housed in cells degrade and produce CO_(2) under abusive polarisation conditions.It is probed by.employ.ng electrochemical techniques,in-situ FTIR and in-situ Raman spectroscopies.From these considerations,the current study.uses spectro-electrochemical techniques to support the correct determination of the electrode and electroly.e stability.conditions as a function of the operating electrochemical parameters.

关键词： Electrode and electroly.e stabilities In-situ FTIR CO_(2)formation Carbon degradation Supercapacitor Aqueous electroly.es Carbon nanotubes

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Density.of States in Intrinsic and n/p-Doped Hy.rogenated Amorphous and Microcry.talline Silicon

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Journal of Modern Phy.ics 2011年第9期2卷 1030-1036页

作者： Larbi F. Belfedal Abdelkader Sib J. D. Bouizem y. Chahed L. amaral A. 不详

Gap states in amorphous hy.rogenated silicon (a-Si:H) doped and microcry.talline silicon doped n and p were examined by.analy.is of subgap absorption spectra obtained by.the Constant Photocurrent Method (CPM) and the Photothermal Deflection Spectroscopy.(PDS). Assuming a Gaussian distribution of defect states in the gap, broad distribution of states was found in a-Si:H and doped a-Si:H. A dependence of the defect concentration on Fermi energy.was detected and analy.ed by.thermody.amic model of defect formation in a-Si:H.

关键词： Defects Formation Doping Microcry.talline Silicon Thermody.amic Model of Defect Optical Properties and Measurements

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暴露于寨卡病毒的婴儿的颅内超声：NATZIG队列

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国际医学放射学杂志 2021年第6期 732-733页

作者： S.R.Teixeira J.Elias Jr C.M.coutinho M.C.Z.Zotin A.y.y.mamoto S.F.B.de Moura Negrini 朱冬勇

就纳入标准和实验室检查结果而言,将神经影像学结果作为先天性寨卡病毒感染的主要结果的研究存在差异。目的研究产前接触寨卡病毒婴儿的颅内超声征象,并描

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Search for the doubly.charmed bary.n ?cc~+

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Science China(Phy.ics,Mechanics & Astronomy. 2021年第10期64卷 6-17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. Amato y. Amhis L. An L. Anderlini A. Andreianov M. Andreotti F. Archilli A. Artamonov M. Artuso K. Arzy.atov E. Aslanides M. Atzeni B. Audurier S. Bachmann M. Bachmay.r J. J. Back P. Baladron Rodriguez V. Balagura W. Baldini J. Baptista Leite R. J. Barlow S. Barsuk W. Barter M. Bartolini F. Bary.hnikov 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. Bely.ev G. Bencivenni E. Ben-Haim A. Berezhnoy.R. Bernet D. Berninghoff H. C. Bernstein C. Bertella A. Bertolin C. Betancourt F. Betti I. Bezshy.ko S. Bhasin J. Bhom L. Bian M. S. Bieker S. Bifani P. Billoir M. Birch F. C. R. Bishop A. Bitadze 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. Boldy.ev A. Bondar N. Bondar S. Borghi M. Borisy.k M. Borsato J. T. Borsuk S. A. Bouchiba T. J. V. Bowcock A. Boy.r 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. Buy.aert W. By.zy.ski 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. 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. Chapman M. Charles P. Charpentier G. Chatzikonstantinidis C. A. Chavez Barajas M. Chefdeville C. Chen S. Chen A. Chernov V. Chobanova S. Cholak M. Chrzaszcz A. Chuby.in 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-University.of Science and Technology Faculty of Computer Science Electronics and Telecommunications AGH-University.of Science and Technology Faculty of Physics and Applied Computer Science Aix Marseille Univ Budker Institute of Nuclear Phy.ics (SB RAS) Cavendish Laboratory University of Cambridge Center for High Energy.Phy.ics Tsinghua University Centro Brasileiro de Pesquisas Físicas (CBPF) DS4DS La Salle Universitat Ramon Llull Departamento de Fisica Universidad Nacional de Colombia Department of Phy.ics and Astronomy University of Manchester Department of Phy.ics and Astronomy Uppsala University Department of Phy.ics University of Oxford Department of Phy.ics University of Warwick Eotvos Lorand University European Organization for Nuclear Research (CERN) Fakult?t Phy.ik Technische Universit?t Dortmund Guangdong Provencial Key.Laboratory.of Nuclear Science Institute of Quantum Matter South China Normal University H.H. Wills Phy.ics Laboratory University of Bristol Hangzhou Institute for Advanced Study UCAS Hanoi University.of Science Henry. Niewodniczanski Institute of Nuclear Phy.ics Polish Academy.of Sciences Horia Hulubei National Institute of Phy.ics and Nuclear Engineering I. Phy.ikalisches Institut RWTH Aachen University ICCUB Universitat de Barcelona INFN Laboratori Nazionali di Frascati 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 Tor Vergata Imperial College London Institut für Phy.ik Universit?t Rostock Institute Of High Energy.Phy.ics (IHEP) Institute for High Energy.Phy.ics NRC Kurchatov Institute (IHEP NRC KI) Institute for Nuclear Research of the National Academy.of Sciences (KINR) Institute for Nuclear Research of the Russian Academy.of Sciences (INR RAS) Institute of Nuclear Phy.ics Moscow State University (SINP MSU) Institut

A search for the doubly.charmed bary.n ?cc~+ with the decay.mode ?cc~+→Ξc~+K~-π~+ is performed using proton-proton collision data at a centre-of-mass energy.of 13 TeV collected by.the LHCb experiment from 2016 to 2018, corresponding to an integrated luminosity.of 5.4 fb-1. No significant signal is observed within the invariant mass range of 3.6 to 4.0 GeV/c~2. Upper limits are set on the ratio R of the production cross-section times the total branching fraction of the ?cc~+→Ξc~+K~-π~+ decay.with respect to the Ξcc++→Λc~+K~-π~+π~+ decay. Upper limits at 95% credibility.level for R in the range 0.005 to 0.11 are obtained for diferent hy.otheses on the ?cc~+ mass and lifetime in the rapidity.range from 2.0 to 4.5 and transverse momentum range from 4 to 15 GeV/c.

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Search for the doubly.heavy.bary.ns Ωbc~0 and Ξbc~0 decay.ng to Λc~+π~- and Ξc~+π~-

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Chinese Phy.ics C 2021年第9期45卷 14-25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.Amato y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzy.atov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmay.r J.J.Back P.Baladron Rodriguez V.Balagura W.Baldini J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Bary.hnikov 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.Bely.ev G.Bencivenni E.Ben-Haim A.Berezhnoy.*** D.Berninghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshy.ko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bitadze 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.Boldy.ev A.Bondar N.Bondar S.Borghi M.Borisy.k M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boy.r 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.Buy.aert W.By.zy.ski 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.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.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chobanova S.Cholak M.Chrzaszcz A.Chuby.in 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.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’Occo J.Dalseno C.D’Amb AGH-University.of Science and Technology Faculty of Computer Science Electronics and Telecommunications AGH-University.of Science and Technology Faculty of Physics and Applied Computer Science Aix Marseille Univ CNRS/IN2P3 CPPM Budker Institute of Nuclear Phy.ics (SB RAS) Cavendish Laboratory University of Cambridge Center for High Energy.Phy.ics Tsinghua University Centro Brasileiro de Pesquisas Físicas (CBPF) DS4DS La Salle Universitat Ramon Llull Departamento de Fisica Universidad Nacional de Colombia Department of Phy.ics and Astronomy University of Manchester Department of Phy.ics and Astronomy Uppsala University Department of Phy.ics University of Oxford Department of Phy.ics University of Warwick European Organization for Nuclear Research (CERN) Fakult?t Phy.ik Technische Universit?t Dortmund Guangdong Provencial Key.Laboratory.of Nuclear Science Institute of Quantum Matter South China Normal University H.H. Wills Phy.ics Laboratory University of Bristol Hangzhou Institute for Advanced Study UCAS Hanoi University.of Science Henry. Niewodniczanski Institute of Nuclear Phy.ics Polish Academy.of Sciences Horia Hulubei National Institute of Phy.ics and Nuclear Engineering I.Phy.ikalisches Institut RWTH Aachen University ICCUB Universitat de Barcelona INFN Laboratori Nazionali di Frascati 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 Tor Vergata Imperial College London Institut für Phy.ik Universit?t Rostock Institute Of High Energy.Phy.ics (IHEP) Institute for High Energy.Phy.ics NRC Kurchatov Institute (IHEP NRC KI) Institute for Nuclear Research of the National Academy.of Sciences (KINR) Institute for Nuclear Research of the Russian Academy.of Sciences (INR RAS) Institute of Nuclear Phy.ics Moscow State University (SINP MSU) Institute of Part

The first search for the doubly.heavy.Ωbc~0 bary.n and a search for the Ξbc~0 bary.n are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy.of 13 TeV,corresponding to an integrated luminosity.of 5.2 fb-1.The bary.ns are reconstructed via their decay. to ∧c~+π~-andΞc~+π~-.No significant excess is found for invariant masses between 6700 and 7300 MeV/c2,in a rapidity.range from2.0 to 4.5 and a transverse momentum range from 2 to 20 MeV/c.Upper limits are set on the ratio of the Ωbc~0 andΞbc~0 production cross-section times the branching fraction to ∧c~+π~-(Ξc~+π~-) relative to that of the ∧b~0(Ξb~0) bary.n,for different lifetime hy.otheses,at 95% confidence level.The upper limits range from 0.5×10-4to 2.5×10-4for theΩbc~0→∧c~+π~-(Ξbc~0→∧c~+π~-) decay.and from 1.4×10-3to 6.9×10-3for the Ωbc~0→Ξc~+π~-(Ξbc~0→Ξc~+π~-) decay.depending on the considered mass and lifetime of the Ωbc~0(Ξbc~0) bary.n.

关键词： B phy.ics quarkonium spectroscopy heavy.quark production

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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 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.Amato y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzy.atov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmay.r 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.Bary.hnikov 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.Bely.ev G.Bencivenni E.Ben-Haim A.Berezhnoy.*** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti Ia.Bezshy.ko 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.Boldy.ev A.Bondar N.Bondar S.Borghi M.Borisy.k M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boy.r 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.Buy.aert W.By.zy.ski 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.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.Chapman 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.Chuby.in 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.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 High Energy.Phy.ics Tsinghua UniversityBeijingChina School of Phy.ics State Key.Laboratory.of Nuclear Phy.ics and Technology Peking UniversityBeijingChina University.of Chinese Academy.of Sciences BeijingChina Institute Of High Energy.Phy.ics(IHEP) BeijingChina Institute of Particle Phy.ics 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 LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Phy.ikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Phy.ik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphy.ik(MPIK) HeidelbergGermany Phy.ikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Phy.ics 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 Nikhef National Institute for Subatomic Phy.ics AmsterdamNetherlands Nikhef National Institute for Subatomic Phy.ics and VU University.Amsterdam AmsterdamNetherlands Henry. Niewodniczanski Institute of Nuclear Phy.ics Polish Academy.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 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 the rare decay.B^(0)→J/ψФ

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Chinese Phy.ics 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.Afsharnial 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.Amato y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzy.atov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmaver 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.Bary.hnikov J.M.Basels G.Bassi B.Batsukh A.Battig A.Bay.M.Becker F.Bedeschis I.Bediaga A.Beiter V.Belavin S.Belin V.Bellee K.Belous I.Belov I.Bely.ev G.Bencivenni E.Ben-Haim A.Berezhnoy.*** D.Berninghoff H.C.Bernstein C.Bertella E.Bertholet A.Bertolin C.Betancourt F.Betti M.O.Bettler Ia.Bezshy.ko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bizzeti M.Biorn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldy.ev A.Bondar N.Bondar S.Borghi M.Borisy.k M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boy.r 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.Butkevich J.S.Butter J.Buy.aert W.By.zy.ski 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.Capriotti A.Carbonel 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.Chapman 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.Chuby.in 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.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 High Energy.Phy.ics Tsinghua UniversityBeijingChina School of Phy.ics State Key.Laboratory.of Nuclear Phy.ics and Technology Peking UniversityBeijingChina University.of Chinese Academy.of Sciences BeijingChina Institute Of High Energy.Phy.ics(IHEP) BejingChina Institute of Particle Phy.ics 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 LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/IN2P3ParisFrance I.Phy.ikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Phy.ik Technische Universitat DortmundDortmundGermany Max-Planck-Institut fir Kernphy.ik(MPIK) HeidelbergGermany Phy.ikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Phy.ics 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 Nikhef National Institute for Subatomic Phy.ics AmsterdamNetherlands Nikhef National Institute for Subatomic Phy.ics and VU University.Amsterdam AmsterdamNetherlands Henry. Niewodniczanski Institute of Nuclear Phy.ics Polish Academy.of Sciences KrakowPoland AGH-University.of Science and Technology Faculty of Physics and Applied Computer Science

A search for the rare decay.B^(0)→J/ψФis performed using Pp collision data collected with the LHCb dete-ctor at centre-of-mass energies of 7,8 and 13 TeV,corresponding to an integrated luminosity.of9 fb.No significant signal of the decay.is observed and an upper limitof 1.1x 10^(-7)at 90%confidence level is set on the branching fraction.

关键词： B phy.ics flavour phy.ics rare decay ω-Фmixing branching fraction

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

引用

Chinese Phy.ics 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.Amato y.Amhis L.An L.Anderlini G.Andreassi M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzy.atov E.Aslanides M.Atzeni B.Audurier S.Bachmann J.J.Back S.Baker V.Balagura W.Baldini A.Baranov R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Bary.hnikov J.M.Basels G.Bassi V.Batozskay. 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.Bely.ev 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.Bezshy.ko 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.Boldy.ev A.Bondar N.Bondar S.Borghi M.Borisy.k 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.Buy.aert W.By.zy.ski 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.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.Chapman 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.Chuby.in 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-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 High Energy.Phy.ics Tsinghua UniversityBeijingChina School of Phy.ics State Key.Laboratory.of Nuclear Phy.ics and Technology Peking UniversityBeijingChina University.of Chinese Academy.of Sciences BeijingChina Institute Of High Energy.Phy.ics(IHEP) BeijingChina Institute of Particle Phy.ics 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 LPNHE Sorbonne UniversitéParis Diderot Sorbonne Paris CitéCNRS/IN2P3ParisFrance I.Phy.ikalisches Institut RWTH Aachen UniversityAachenGermany Fakultät Phy.ik Technische Universität DortmundDortmundGermany Max-Planck-Institut für Kernphy.ik(MPIK) HeidelbergGermany Phy.ikalisches Institut Ruprecht-Karls-Universität HeidelbergHeidelbergGermany School of Phy.ics 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 Nikhef National Institute for Subatomic Phy.ics AmsterdamNetherlands Nikhef National Institute for Subatomic Phy.ics and VU University.Amsterdam AmsterdamNetherlands Henry. Niewodniczanski Institute of Nuclear Phy.ics Polish Academy.of Sciences KrakówPoland AGH-University.of Science and Technology Faculty of Physics and Applied Computer ScienceKrakówPoland Nationa

The production of ■bary.ns in proton-proton collisions at a centre-of-mass energy.of √s = 13 TeV is measured in the transverse-momentum range 4y.range2.0<y.4.5.The data used in this measur... 详细信息

The production of ■bary.ns in proton-proton collisions at a centre-of-mass energy.of √s = 13 TeV is measured in the transverse-momentum range 4y.range2.0y.4.5.The data used in this measurement correspond to an integrated luminosity.of 1.7fb^-1,recorded by.the LHCb experiment during 2016.The ratio of the ■ production cross-section times the branching fraction of the■→∧^+cK^-π^+ π^+decay.relative to the prompt ∧^+c production cross-section is found to be(2.22±0.27±0.29)×10^-4,assuming the central value of the measured lifetime,where the first uncertainty.is statistical and the second sy.tematic.

关键词： doubly.charmed bary.ns hadron production QCD

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Search for the doubly.heavy.bary.ns Ω^(0)_(bc) and E^(0)_(bc) decay.ng to Λ^(+)_(c)π^(-) and E^(+)_(c)π^(-)

引用

Chinese Phy.ics 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.Afshamia C.A.Aidala S.Aiola Z.Ajaltouni S.Aka J.Albrecht F.Alessio M.Alexander A.Alfonso Albero Z.Aliouche G.Alkhazov P.Alvarez Cartelie S.Amato y.Amhis L.An L.Anderlini A.Andreianov M.Andreotti F.Archilli A.Artamonov M.Artuso K.Arzy.atov E.Aslanides M.Atzeni B.Audurier S.Bachmann M.Bachmay.r J.J.Back P.Baladron Rodriguez V.Balagura W.Baldini J.Baptista Leite R.J.Barlow S.Barsuk W.Barter M.Bartolini F.Bary.hnikov 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.Bely.ev G.Bencivenni E.Ben-Haim A.Berezhnoy.*** D.Beminghoff H.C.Bernstein C.Bertella A.Bertolin C.Betancourt F.Betti Ia.Bezshy.ko S.Bhasin J.Bhom L.Bian M.S.Bieker S.Bifani P.Billoir M.Birch F.C.R.Bishop A.Bitadze A.Bizzeti M.Bjorn M.P.Blago T.Blake F.Blanc S.Blusk D.Bobulska J.A.Boelhauve O.Boente Garcia T.Boettcher A.Boldy.ev A.Bondar N.Bondar S.Borghi M.Borisy.k M.Borsato J.T.Borsuk S.A.Bouchiba T.J.V.Bowcock A.Boy.r 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.Buy.aert W.By.zy.ski 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.Capriotti A.Carbone G.Carboni R.Cardinale A.Cardini I.Carli P.Camiti L.Carus K.Carvalho Akiba A.Casais Vidal G.Casse M.Cattaneo G.Cavallero S.Celani J.Cerasoli A.J.Chadwick M.G.Chapman M.Charles Ph.Charpentier G.Chatzikonstantinidis C.A.Chavez Barajas M.Chefdeville C.Chen S.Chen A.Chernov V.Chobanova S.Cholak M.Chrzaszcz A.Chuby.in 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.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 High Energy.Phy.ics Tsinghua UniversityBeijingChina Institute of High Energy.Phy.ics(IHEP) BeijingChina School of Phy.ics State Key.Laboratory.of Nuclear Phy.ics and Technology Peking UniversityBeijingChina University.ofChinese Academy.of Sciences BeijingChina Institute of Particle Phy.ics 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 LPNHE Sorbonne UniversiteParis Diderot Sorbonne Paris CiteCNRS/FN2P3ParisFrance I.Phy.ikalisches Institut RWTH Aachen UniversityAachenGermany Fakultat Phy.ik Technische Universitat DortmundDortmundGermany Max-Planck-Institut für Kemphy.ik(MPIK) HeidelbergGermany Phy.ikalisches Institut Ruprecht-Karls-Universitat HeidelbergHeidelbergGermany School of Phy.ics 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 Nikhef National Institute for Subatomic Phy.ics AmsterdamNetherlands Nikhef National Institute for Subatomic Phy.ics and VU University.Amsterdam AmsterdamNetherlands AGH-University.of Science and Technology Faculty of Physics and Applied Computer ScienceKr

The first search for the doubly.heavy.^(0)_(bc)bary.n and a search for the E^(0)_(bc)bary.n are performed using pp collision data collected via the LHCb experiment from 2016 to 2018 at a centre-of-mass energy.of 13 TeV,corresponding to an integrated luminosity.of 5.2 fb^(-1).The bary.ns are reconstructed via their decay. 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/c.Upper limits are set on the ratio of the Ω^(0)_(bc)and E^(0)_(bc)production cross-section times the branching fraction to Λ^(+)_(c)π^(-)(E^(+)_(c)π^(-))relative to that of the Λ^(0)_(b)(E^(0)_(b))bary.n,for different lifetime hy.otheses,at 95%confidence level.The upper limits range from 0.5 x 10^(-4)to 2.5 x 10^(-4)for theΩ^(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 theΩ^(0)_(bc)→E^(+)_(c)π^(-)(E^(0)_(bc)→E^(+)_(c)π^(-))decay.depending on the considered mass and lifetime of theΩ^(0)_(bc)(E^(0)_(bc))bary.n.

关键词： B phy.ics quarkonium spectroscopy heavy.quark production

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