Observation Of Multiplicity Dependent Prompt Chi(C1) (3872) And Psi (2s) Production In Pp Collisions
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 Arzymatov, E Aslanides,M Atzeni, B Audurier,S Bachmann,M Bachmayer, 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, R Bernet, D Berninghoff, H C Bernstein, C Bertella, E Bertholet,A Bertolin,C Betancourt,F Betti,M O Bettler,Ia Bezshyiko,S Bhasin, J Bhom,L Bian,M S Bieker,S Bifani, P Billoir, M Birch, F C R Bishop,A Bizzeti,M Bjørn,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 Gomez,P Camargo Magalhaes,A Camboni,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,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 Chubykin, 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'Ambrosio, A Danilina, P d'Argent,A Davis,O De Aguiar Francisco,K De Bruyn,S De Capua,M De Cian,J M De Miranda,L De Paula,M De Serio,D De Simone,P De Simone,J A de Vries,C T Dean,W Dean, D Decamp,L Del Buono,B Delaney,H-P Dembinski, A Dendek, V Denysenko, D Derkach,O Deschamps, F Desse,F Dettori,B Dey,P Di Nezza,S Didenko,L Dieste Maronas,H Dijkstra, V Dobishuk, A M Donohoe,F Dordei,A C Dos Reis, L Douglas, A Dovbnya, A G Downes, K Dreimanis, M W Dudek,L Dufour,V Duk,P Durante,J M Durham,D Dutta,M Dziewiecki, 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, A Falabella,J Fan,Y Fan,B Fang, N Farley, S Farry,D Fazzini, P Fedin,M Féo,P Fernandez Declara,A Fernandez Prieto,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, C Fitzpatrick,T Fiutowski,F Fleuret,M Fontana,F Fontanelli, R Forty,V Franco Lima,M Franco Sevilla,M Frank, E Franzoso, G Frau,C Frei,D A Friday,J Fu, Q Fuehring, W Funk,E Gabriel,T Gaintseva,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 Pardiñas,B Garcia Plana,F A Garcia Rosales,L Garrido,D Gascon,C Gaspar, R E Geertsema, D Gerick, L L Gerken,E Gersabeck,M Gersabeck, T Gershon,D Gerstel,Ph Ghez,V Gibson,M Giovannetti, A Gioventù,P Gironella Gironell, L Giubega, C Giugliano,K Gizdov,E L Gkougkousis,V V Gligorov,C Göbel, E Golobardes, D Golubkov, A Golutvin,A Gomes,S Gomez Fernandez,M Goncerz,G Gong, P Gorbounov, I V Gorelov, C Gotti,E Govorkova,J P Grabowski,R Graciani Diaz, T Grammatico,L A Granado Cardoso,E Graugés,E Graverini, G Graziani,A Grecu, L M Greeven,P Griffith, L Grillo,S Gromov,L Gruber,B R Gruberg Cazon,C Gu, M Guarise,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, P M Hamilton,Q Han,X Han,T H Hancock, S Hansmann-Menzemer, N Harnew,T Harrison,C Hasse, M Hatch, J He,M Hecker, K Heijhoff,K Heinicke,A M Hennequin,K Hennessy,L Henry,J Heuel,A Hicheur, D Hill,M Hilton, S E Hollitt, P H Hopchev,J Hu,W Hu,W Huang,X Huang,W Hulsbergen,R J Hunter,M Hushchyn,D Hutchcroft,D Hynds,P Ibis,M Idzik, D Ilin,P Ilten, A Inglessi, A Ishteev,K Ivshin, R Jacobsson,S Jakobsen,E Jans,B K Jashal,A Jawahery,V Jevtic, M Jezabek,F Jiang,M John, D Johnson,C R Jones,T P Jones,B Jost,N Jurik,S Kandybei,Y Kang, M Karacson,J M Kariuki,N Kazeev,M Kecke, F Keizer,M Kenzie,T Ketel, B Khanji, A Kharisova,S Kholodenko,K E Kim,T Kirn,V S Kirsebom, O Kitouni,S Klaver,K Klimaszewski,S Koliiev,A Kondybayeva, A Konoplyannikov,P Kopciewicz,R Kopecna,P Koppenburg,M Korolev,I Kostiuk,O Kot,S Kotriakhova,P Kravchenko, L Kravchuk, R D Krawczyk, M Kreps, F Kress, S Kretzschmar,P Krokovny,W Krupa,W Krzemien,W Kucewicz, M Kucharczyk,V Kudryavtsev,H S Kuindersma,G J Kunde, T Kvaratskheliya, 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,R Le Gac,S H Lee,R Lefèvre, A Leflat, S Legotin,O Leroy,T Lesiak, B Leverington,H Li,L Li,P Li,X Li,Y Li,Z Li,X Liang,T Lin,R Lindner,V Lisovskyi, R Litvinov,G Liu,H Liu,S Liu,X Liu,A Loi,J Lomba Castro, I Longstaff,J H Lopes,G Loustau, G H Lovell,Y Lu,D Lucchesi,S Luchuk,M Lucio Martinez,V Lukashenko,Y Luo, A Lupato,E Luppi,O Lupton,A Lusiani,X Lyu,L Ma,S Maccolini, F Machefert, F Maciuc,V Macko,P Mackowiak,S Maddrell-Mander,O Madejczyk,L R Madhan Mohan, O Maev, A Maevskiy,D Maisuzenko,M W Majewski,S Malde,B Malecki,A Malinin,T Maltsev,H Malygina,G Manca, G Mancinelli,R Manera Escalero, D Manuzzi,D Marangotto,J Maratas,J F Marchand, U Marconi,S Mariani,C Marin Benito,M Marinangeli,P Marino,J Marks,P J 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Oyanguren, 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,C J Parkinson, B Passalacqua,G Passaleva,A Pastore,M Patel,C Patrignani, C J Pawley,A Pearce,A Pellegrino,M Pepe Altarelli,S Perazzini,D Pereima, P Perret, K Petridis,A Petrolini,A Petrov,S Petrucci, M Petruzzo, A Philippov, L Pica,M Piccini, B Pietrzyk, G Pietrzyk, M Pili,D Pinci, J Pinzino,F Pisani, A Piucci, Resmi P K,V Placinta,S Playfer,J Plews,M Plo Casasus, F Polci,M Poli Lener, M Poliakova, A Poluektov,N Polukhina, I Polyakov, E Polycarpo,G J Pomery,S Ponce,A Popov,D Popov,S Popov,S Poslavskii, K Prasanth, L Promberger, C Prouve, V Pugatch,A Puig Navarro, H Pullen,G Punzi, W Qian,J Qin, R Quagliani, B Quintana,N V Raab,R I Rabadan Trejo,B Rachwal, J H Rademacker,M Rama,M Ramos Pernas,M S Rangel, F Ratnikov,G Raven,M Reboud,F Redi,F Reiss,C Remon Alepuz,Z Ren, V Renaudin, R Ribatti,S Ricciardi, D S Richards,K Rinnert,P Robbe,A 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Vilella Figueras,P Vincent,G Vitali, A Vollhardt,D Vom Bruch, A Vorobyev,V Vorobyev,N Voropaev, R Waldi, J Walsh,C Wang,J Wang,M Wang,R Wang,Y Wang,Z Wang,D R Ward,H M Wark,N K Watson,S G Weber,D Websdale,C Weisser, B D C Westhenry,D J White,M Whitehead, D Wiedner,G Wilkinson,M Wilkinson,I Williams,M Williams,M R J Williams,F F Wilson,W Wislicki,M Witek, L Witola,G Wormser,S A Wotton,H Wu, K Wyllie,Z Xiang, D Xiao,Y Xie,H Xing,A Xu,J Xu,L Xu,M Xu,Q Xu,Z Xu,D Yang,Y Yang,Z Yang,Y Yao,L E Yeomans,H Yin,J Yu,X Yuan, O Yushchenko,K A Zarebski,M Zavertyaev, M Zdybal, O Zenaiev,M Zeng,D Zhang, L Zhang,S Zhang,Y Zhang, A Zhelezov,Y Zheng,X Zhou,Y Zhou,X Zhu,V Zhukov,J B Zonneveld,S Zucchelli,D Zuliani, G Zunica
arxiv（2021）
引用 24|浏览84
摘要
The production of chi(c1)(3872) and psi(2S) hadrons is studied as a function of charged particle multiplicity in pp collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2 fb(-1). For both states, the fraction that is produced promptly at the collision vertex is found to decrease as charged particle multiplicity increases. The ratio of chi(c1) (3872) to psi(2S) cross sections for promptly produced particles is also found to decrease with multiplicity, while no significant dependence on multiplicity is observed for the equivalent ratio of particles produced away from the collision vertex in b-hadron decays. This behavior is consistent with a calculation that models the chi(c1) (3872) structure as a compact tetraquark. Comparisons with model calculations and implications for the binding energy of the chi(c1)(3872) state are discussed.
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关键词
collisions,$pp$,multiplicity-dependent
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