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高能电子束流引发的横向极化气体氢靶共振退极化研究
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作者 王思广 周书华 +8 位作者 叶云秀 叶震宇 冒亚军 M.Bouwhuis Y.Holler p.lenisa D.Reggiani H.Marukyan P.Tait 《高能物理与核物理》 EI CSCD 北大核心 2006年第9期892-895,共4页
对于HERMES横向极化气体氢靶,高能电子束流所激发的高频磁场会引发共振退极化．本文就该极化度下降的产生机制进行研究,并给出σ_(24)共振点发生位置的测量结果,并且将极化靶磁场的强度稳定在远离共振点处,挽回了数据获取时极化度近3%... 对于HERMES横向极化气体氢靶,高能电子束流所激发的高频磁场会引发共振退极化．本文就该极化度下降的产生机制进行研究,并给出σ_(24)共振点发生位置的测量结果,并且将极化靶磁场的强度稳定在远离共振点处,挽回了数据获取时极化度近3%的共振损失． 展开更多
关键词 共振 极化气体靶 极化度
原文传递
Search for the doubly heavy baryon Ξ_(bc)^(+)→ decaying to J/ψΞ_(c)^(+) 被引量：1
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作者 R.Aaij A.S.W.Abdelmotteleb +1013 位作者 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 R.Bernet 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 G.Coombs I.Corredoira G.Corti B.Couturier D.C.Craik J.Crkovská M.Cruz Torres R.Currie C.L.Da Silva S.Dadabaev L.Dai E.Dall'Occo J.Dalseno C.D'Ambrosio A.Danilina P.d'Argent J.E.Davies A.Davis O.De Aguiar Francisco J.de Boer K.De Bruyn S.De Capua M.De Cian U.De Freitas Carneiro Da Graca E.De Lucia J.M.De Miranda L.De Paula M.De Serio D.De Simone P.De Simone F.De Vellis J.A.de Vries C.T.Dean F.Debernardis D.Decamp V.Dedu L.Del Buono B.Delaney H.-P.Dembinski V.Denysenko O.Deschamps F.Dettori B.Dey A.Di Cicco P.Di Nezza S.Didenko L.Dieste Maronas S.Ding V.Dobishuk A.Dolmatov C.Dong A.M.Donohoe F.Dordei A.C.dos Reis L.Douglas A.G.Downes M.W.Dudek L.Dufour V.Duk P.Durante J.M.Durham D.Dutta A.Dziurda A.Dzyuba S.Easo U.Egede V.Egorychev S.Eidelman S.Eisenhardt S.Ek-In L.Eklund S.Ely A.Ene E.Epple S.Escher J.Eschle S.Esen T.Evans L.N.Falcao Y.Fan B.Fang S.Farry D.Fazzini M.Feo A.D.Fernez F.Ferrari L.Ferreira Lopes F.Ferreira Rodrigues S.Ferreres Sole M.Ferrillo M.Ferro-Luzzi S.Filippov R.A.Fini M.Fiorini M.Firlej K.M.Fischer D.S.Fitzgerald C.Fitzpatrick T.Fiutowski F.Fleuret M.Fontana F.Fontanelli R.Forty D.Foulds-Holt V.Franco Lima M.Franco Sevilla M.Frank E.Franzoso G.Frau C.Frei D.A.Friday J.Fu Q.Fuehring E.Gabriel G.Galati A.Gallas Torreira D.Galli S.Gambetta Y.Gan M.Gandelman P.Gandini Y.Gao M.Garau L.M.Garcia Martin P.Garcia Moreno J.García Pardiäas B.Garcia Plana F.A.Garcia Rosales L.Garrido C.Gaspar R.E.Geertsema D.Gerick L.L.Gerken E.Gersabeck M.Gersabeck T.Gershon L.Giambastiani V.Gibson H.K.Giemza A.L.Gilman M.Giovannetti A.Gioventù P.Gironella Gironell C.Giugliano M.A.Giza K.Gizdov E.L.Gkougkousis V.V.Gligorov C.Gäbel E.Golobardes D.Golubkov A.Golutvin A.Gomes S.Gomez Fernandez F.Goncalves Abrantes M.Goncerz G.Gong I.V.Gorelov C.Gotti J.P.Grabowski T.Grammatico L.A.Granado Cardoso E.Graugés E.Graverini G.Graziani A.T.Grecu L.M.Greeven N.A.Grieser L.Grillo S.Gromov B.R.Gruberg Cazon C.Gu M.Guarise M.Guittiere P.A.Günther E.Gushchin A.Guth Y.Guz T.Gys T.Hadavizadeh G.Haefeli C.Haen J.Haimberger S.C.Haines T.Halewood-leagas M.M.Halvorsen P.M.Hamilton J.Hammerich Q.Han X.Han E.B.Hansen S.Hansmann-Menzemer L.Hao N.Harnew T.Harrison C.Hasse M.Hatch J.He K.Heijhoff K.Heinicke R.D.L.Henderson A.M.Hennequin K.Hennessy L.Henry J.Heuel A.Hicheur D.Hill M.Hilton S.E.Hollitt R.Hou Y.Hou J.Hu J.Hu W.Hu X.Hu W.Huang X.Huang W.Hulsbergen R.J.Hunter M.Hushchyn D.Hutchcroft P.Ibis M.Idzik D.Ilin P.Ilten A.Inglessi A.Iniukhin A.Ishteev K.Ivshin R.Jacobsson H.Jage S.J.Jaimes Elles S.Jakobsen E.Jans B.K.Jashal A.Jawahery V.Jevtic X.Jiang M.John D.Johnson C.R.Jones T.P.Jones B.Jost N.Jurik S.Kandybei Y.Kang M.Karacson D.Karpenkov M.Karpov J.W.Kautz F.Keizer D.M.Keller M.Kenzie T.Ketel B.Khanji A.Kharisova S.Kholodenko T.Kirn V.S.Kirsebom O.Kitouni S.Klaver N.Kleijne K.Klimaszewski M.R.Kmiec S.Koliiev A.Kondybayeva A.Konoplyannikov P.Kopciewicz R.Kopecna P.Koppenburg M.Korolev I.Kostiuk O.Kot S.Kotriakhova A.Kozachuk P.Kravchenko L.Kravchuk R.D.Krawczyk M.Kreps S.Kretzschmar P.Krokovny W.Krupa W.Krzemien J.Kubat W.Kucewicz M.Kucharczyk V.Kudryavtsev G.J.Kunde D.Lacarrere G.Lafferty A.Lai A.Lampis D.Lancierini J.J.Lane R.Lane G.Lanfranchi C.Langenbruch J.Langer O.Lantwin T.Latham F.Lazzari M.Lazzaroni R.Le Gac S.H.Lee R.Lefèvre A.Leflat S.Legotin p.lenisa O.Leroy T.Lesiak B.Leverington H.Li K.Li P.Li S.Li Y.Li Z.Li X.Liang C.Lin T.Lin R.Lindner V.Lisovskyi R.Litvinov G.Liu H.Liu Q.Liu S.Liu A.Lobo Salvia A.Loi R.Lollini J.Lomba Castro I.Longstaff J.H.Lopes S.López Soliäo G.H.Lovell Y.Lu C.Lucarelli D.Lucchesi S.Luchuk M.Lucio Martinez V.Lukashenko Y.Luo A.Lupato E.Luppi A.Lusiani K.Lynch X.-R.Lyu L.Ma R.Ma S.Maccolini F.Machefert F.Maciuc V.Macko P.Mackowiak S.Maddrell-Mander L.R.Madhan Mohan A.Maevskiy D.Maisuzenko M.W.Majewski J.J.Malczewski S.Malde B.Malecki A.Malinin T.Maltsev H.Malygina G.Manca G.Mancinelli D.Manuzzi C.A.Manzari D.Marangotto J.F.Marchand U.Marconi S.Mariani C.Marin Benito M.Marinangeli J.Marks A.M.Marshall P.J.Marshall G.Martelli G.Martellotti L.Martinazzoli M.Martinelli D.Martinez Santos F.Martinez Vidal A.Massafferri M.Materok R.Matev A.Mathad V.Matiunin C.Matteuzzi K.R.Mattioli A.Mauri E.Maurice J.Mauricio M.Mazurek M.McCann L.Mcconnell T.H.McGrath N.T.McHugh A.McNab R.McNulty J.V.Mead B.Meadows G.Meier D.Melnychuk S.Meloni M.Merk A.Merli L.Meyer Garcia M.Mikhasenko D.A.Milanes E.Millard M.Milovanovic M.-N.Minard A.Minotti S.E.Mitchell B.Mitreska D.S.Mitzel A.Mädden R.A.Mohammed R.D.Moise S.Mokhnenko T.Mombächer I.A.Monroy S.Monteil M.Morandin G.Morello M.J.Morello J.Moron A.B.Morris A.G.Morris R.Mountain H.Mu F.Muheim M.Mulder K.Müller C.H.Murphy D.Murray R.Murta P.Muzzetto P.Naik T.Nakada R.Nandakumar T.Nanut I.Nasteva M.Needham N.Neri S.Neubert N.Neufeld P.Neustroev R.Newcombe E.M.Niel S.Nieswand N.Nikitin N.S.Nolte C.Normand C.Nunez A.Oblakowska-Mucha V.Obraztsov T.Oeser D.P.O'Hanlon S.Okamura R.Oldeman F.Oliva M.E.Olivares C.J.G.Onderwater R.H.O'Neil J.M.Otalora Goicochea T.Ovsiannikova P.Owen A.Oyanguren O.Ozcelik K.O.Padeken B.Pagare P.R.Pais T.Pajero A.Palano M.Palutan Y.Pan G.Panshin A.Papanestis M.Pappagallo L.L.Pappalardo C.Pappenheimer W.Parker C.Parkes B.Passalacqua G.Passaleva A.Pastore M.Patel C.Patrignani C.J.Pawley A.Pearce A.Pellegrino M.Pepe Altarelli S.Perazzini D.Pereima A.Pereiro Castro P.Perret M.Petric K.Petridis A.Petrolini A.Petrov S.Petrucci M.Petruzzo H.Pham A.Philippov R.Piandani L.Pica M.Piccini B.Pietrzyk G.Pietrzyk M.Pili D.Pinci F.Pisani M.Pizzichemi V.Placinta J.Plews M.Plo Casasus F.Polci M.Poli Lener M.Poliakova A.Poluektov N.Polukhina I.Polyakov E.Polycarpo S.Ponce D.Popov S.Popov S.Poslavskii K.Prasanth L.Promberger C.Prouve V.Pugatch V.Puill G.Punzi H.R.Qi W.Qian N.Qin S.Qu R.Quagliani N.V.Raab R.I.Rabadan Trejo B.Rachwal J.H.Rademacker R.Rajagopalan M.Rama M.Ramos Pernas M.S.Rangel F.Ratnikov G.Raven M.Rebollo De Miguel F.Redi F.Reiss C.Remon Alepuz Z.Ren V.Renaudin P.K.Resmi R.Ribatti A.M.Ricci S.Ricciardi K.Rinnert P.Robbe G.Robertson A.B.Rodrigues E.Rodrigues J.A.Rodriguez Lopez E.Rodriguez Rodriguez A.Rollings P.Roloff V.Romanovskiy M.Romero Lamas A.Romero Vidal J.D.Roth M.Rotondo M.S.Rudolph T.Ruf R.A.Ruiz Fernandez J.Ruiz Vidal A.Ryzhikov J.Ryzka J.J.Saborido Silva N.Sagidova N.Sahoo B.Saitta M.Salomoni C.Sanchez Gras I.Sanderswood R.Santacesaria C.Santamarina Rios M.Santimaria E.Santovetti D.Saranin G.Sarpis M.Sarpis A.Sarti C.Satriano A.Satta M.Saur D.Savrina H.Sazak L.G.Scantlebury Smead A.Scarabotto S.Schael S.Scherl M.Schiller H.Schindler M.Schmelling B.Schmidt S.Schmitt O.Schneider A.Schopper M.Schubiger S.Schulte M.H.Schune R.Schwemmer B.Sciascia A.Sciuccati S.Sellam A.Semennikov M.Senghi Soares A.Sergi N.Serra L.Sestini A.Seuthe Y.Shang D.M.Shangase M.Shapkin I.Shchemerov L.Shchutska T.Shears L.Shekhtman Z.Shen S.Sheng V.Shevchenko E.B.Shields Y.Shimizu E.Shmanin J.D.Shupperd B.G.Siddi R.Silva Coutinho G.Simi S.Simone M.Singla N.Skidmore R.Skuza T.Skwarnicki M.W.Slater I.Slazyk J.C.Smallwood J.G.Smeaton E.Smith M.Smith A.Snoch L.Soares Lavra M.D.Sokoloff F.J.P.Soler A.Solomin A.Solovev I.Solovyev F.L.Souza De Almeida B.Souza De Paula B.Spaan E.Spadaro Norella E.Spiridenkov P.Spradlin V.Sriskaran F.Stagni M.Stahl S.Stahl S.Stanislaus O.Steinkamp O.Stenyakin H.Stevens S.Stone D.Strekalina F.Suljik J.Sun L.Sun Y.Sun P.Svihra P.N.Swallow K.Swientek A.Szabelski T.Szumlak M.Szymanski S.Taneja A.R.Tanner M.D.Tat A.Terentev F.Teubert E.Thomas D.J.D.Thompson K.A.Thomson H.Tilquin V.Tisserand S.T'Jampens M.Tobin L.Tomassetti G.Tonani X.Tong D.Torres Machado D.Y.Tou E.Trifonova S.M.Trilov C.Trippl G.Tuci A.Tully N.Tuning A.Ukleja D.J.Unverzagt E.Ursov A.Usachov A.Ustyuzhanin U.Uwer A.Vagner V.Vagnoni A.Valassi G.Valenti N.Valls Canudas M.van Beuzekom M.Van Dijk H.Van Hecke E.van Herwijnen M.van Veghel R.Vazquez Gomez P.Vazquez Regueiro C.Vázquez Sierra S.Vecchi J.J.Velthuis M.Veltri A.Venkateswaran M.Veronesi M.Vesterinen D.Vieira M.Vieites Diaz X.Vilasis-Cardona E.Vilella Figueras A.Villa P.Vincent F.C.Volle D.vom Bruch A.Vorobyev V.Vorobyev N.Voropaev K.Vos R.Waldi J.Walsh C.Wang J.Wang J.Wang J.Wang J.Wang M.Wang R.Wang Y.Wang Z.Wang Z.Wang Z.Wang J.A.Ward N.K.Watson D.Websdale C.Weisser B.D.C.Westhenry D.J.White M.Whitehead A.R.Wiederhold D.Wiedner G.Wilkinson M.K.Wilkinson I.Williams M.Williams M.R.J.Williams R.Williams F.F.Wilson W.Wislicki M.Witek L.Witola C.P.Wong G.Wormser S.A.Wotton H.Wu K.Wyllie Z.Xiang D.Xiao Y.Xie A.Xu J.Xu L.Xu M.Xu Q.Xu Z.Xu Z.Xu D.Yang S.Yang Y.Yang Z.Yang Z.Yang L.E.Yeomans H.Yin J.Yu X.Yuan E.Zaffaroni M.Zavertyaev M.Zdybal O.Zenaiev M.Zeng D.Zhang L.Zhang S.Zhang S.Zhang Y.Zhang Y.Zhang A.Zharkova A.Zhelezov Y.Zheng T.Zhou X.Zhou Y.Zhou V.Zhovkovska X.Zhu X.Zhu Z.Zhu V.Zhukov Q.Zou S.Zucchelli D.Zuliani G.Zunica LHCb Collaboration 无 《Chinese Physics C》 SCIE CAS CSCD 2023年第9期1-13,共13页
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... 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. 展开更多
关键词 QCD B physics charm physics spectroscopy
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Search for the rare decays W^(+)→D_(s)^(+)γ and Z→D^(0)γ at LHCb 被引量：1
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作者 R.Aaij A.S.W.Abdelmotteleb +1069 位作者 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 R.Bernet S.Bernet 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.Cogneras L.Cojocariu P.Collins T.Colombo L.Congedo A.Contu N.Cooke I.Corredoira G.Corti B.Couturier D.C.Craik M.Cruz Torres R.Currie C.L.Da Silva S.Dadabaev L.Dai X.Dai E.Dall'Occo J.Dalseno C.D'Ambrosio J.Daniel A.Danilina P.d'Argent J.E.Davies A.Davis O.De Aguiar Francisco J.de Boer K.De Bruyn S.De Capua M.De Cian U.De Freitas Carneiro Da Graca E.De Lucia J.M.De Miranda L.De Paula M.De Serio D.De Simone P.De Simone F.De Vellis J.A.de Vries C.T.Dean F.Debernardis D.Decamp V.Dedu L.Del Buono B.Delaney H.-P.Dembinski V.Denysenko O.Deschamps F.Dettori B.Dey P.Di Nezza I.Diachkov S.Didenko L.Dieste Maronas S.Ding V.Dobishuk A.Dolmatov C.Dong A.M.Donohoe F.Dordei A.C.dos Reis L.Douglas A.G.Downes P.Duda M.W.Dudek L.Dufour V.Duk P.Durante M.M.Duras J.M.Durham D.Dutta A.Dziurda A.Dzyuba S.Easo U.Egede V.Egorychev S.Eidelman C.Eirea Orro S.Eisenhardt E.Ejopu S.Ek-In L.Eklund S.Ely A.Ene E.Epple S.Escher J.Eschle S.Esen T.Evans 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Z.Xiang D.Xiao Y.Xie A.Xu J.Xu L.Xu L.Xu M.Xu Q.Xu Z.Xu Z.Xu D.Yang S.Yang X.Yang Y.Yang Z.Yang Z.Yang L.E.Yeomans V.Yeroshenko H.Yeung H.Yin J.Yu X.Yuan E.Zaffaroni M.Zavertyaev M.Zdybal O.Zenaiev M.Zeng C.Zhang D.Zhang L.Zhang S.Zhang S.Zhang Y.Zhang Y.Zhang A.Zharkova A.Zhelezov Y.Zheng T.Zhou X.Zhou Y.Zhou V.Zhovkovska X.Zhu X.Zhu Z.Zhu V.Zhukov Q.Zou S.Zucchelli D.Zuliani G.Zunica LHCb Collaboration 《Chinese Physics C》 SCIE CAS CSCD 2023年第9期14-26,共13页
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... 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−1.No 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 channels.The 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,respectively.This 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. 展开更多
关键词 W/Z boson rare decay upper limit of branching fraction
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