Measurement of the [Formula: see text] production cross-section in proton-proton collisions via the decay [Formula: see text].

R Aaij,C Abellán Beteta,B Adeva,M Adinolfi,A Affolder, Z Ajaltouni,S Akar, J Albrecht, F Alessio, M Alexander,S Ali, G Alkhazov,P Alvarez Cartelle, A A Alves,S Amato, S Amerio, Y Amhis, L An,L Anderlini,J Anderson,R Andreassen, M Andreotti, J E Andrews,R B Appleby,O Aquines Gutierrez, F Archilli, A Artamonov,M Artuso, E Aslanides, G Auriemma, M Baalouch,S Bachmann, J J Back, A Badalov, C Baesso,W Baldini,R J Barlow, C Barschel, S Barsuk,W Barter, V Batozskaya, V Battista, A Bay, L Beaucourt, J Beddow, F Bedeschi, I Bediaga,S Belogurov, K Belous, I Belyaev, E Ben-Haim, G Bencivenni,S Benson,J Benton,A Berezhnoy, R Bernet,M-O Bettler,M van Beuzekom, A Bien, S Bifani,T Bird,A Bizzeti, P M Bjørnstad,T Blake,F Blanc,J Blouw,S Blusk,V Bocci, A Bondar, N Bondar,W Bonivento,S Borghi, A Borgia,M Borsato,T J V Bowcock,E Bowen, C Bozzi,T Brambach, J Bressieux,D Brett, M Britsch,T Britton,J Brodzicka, N H Brook,H Brown, A Bursche,G Busetto,J Buytaert,S Cadeddu,R Calabrese, M Calvi,M Calvo Gomez, P Campana,D Campora Perez,A Carbone, G Carboni, R Cardinale, A Cardini,L Carson,K Carvalho Akiba, G Casse, L Cassina,L Castillo Garcia, M Cattaneo,Ch Cauet, R Cenci,M Charles,Ph Charpentier, M Chefdeville,S Chen,S-F Cheung, N Chiapolini, M Chrzaszcz, K Ciba,X Cid Vidal, G Ciezarek, P E L Clarke, M Clemencic, H V Cliff, J Closier,V Coco, J Cogan, E Cogneras,V Cogoni, L Cojocariu,P Collins, A Comerma-Montells, A Contu,A Cook, M Coombes, S Coquereau,G Corti, M Corvo, I Counts, B Couturier, G A Cowan, D C Craik,M Cruz Torres,S Cunliffe,R Currie, C D'Ambrosio,J Dalseno,P David,P N Y David,A Davis,K De Bruyn,S De Capua,M De Cian,J M De Miranda,L De Paula,W De Silva,P De Simone, D Decamp, M Deckenhoff,L Del Buono, N Déléage, D Derkach,O Deschamps, F Dettori,A Di Canto, H Dijkstra, S Donleavy, F Dordei,M Dorigo,A Dosil Suárez, D Dossett, A Dovbnya, K Dreimanis, G Dujany, F Dupertuis,P Durante,R Dzhelyadin, A Dziurda, A Dzyuba,S Easo,U Egede,V Egorychev,S Eidelman,S Eisenhardt, U Eitschberger, R Ekelhof,L Eklund,I El Rifai,E Elena,Ch Elsasser,S Ely,S Esen,H-M Evans,T Evans, A Falabella, C Färber,C Farinelli, N Farley, S Farry, R F Fay,D Ferguson,V Fernandez Albor,F Ferreira Rodrigues, M Ferro-Luzzi,S Filippov,M Fiore, M Fiorini,M Firlej, C Fitzpatrick,T Fiutowski, P Fol,M Fontana,F Fontanelli, R Forty,O Francisco,M Frank,C Frei, M Frosini,J Fu, E Furfaro,A Gallas Torreira, D Galli,S Gallorini,S Gambetta, M Gandelman, P Gandini, Y Gao,J García Pardiñas, J Garofoli,J Garra Tico, L Garrido,C Gaspar, R Gauld, L Gavardi, G Gavrilov,A Geraci,E Gersabeck,M Gersabeck, T Gershon,Ph Ghez, A Gianelle,S Gianì, V Gibson, L Giubega, V V Gligorov,C Göbel, D Golubkov, A Golutvin,A Gomes, C Gotti,M Grabalosa Gándara,R Graciani Diaz,L A Granado Cardoso, E Graugés, G Graziani, A Grecu, E Greening,S Gregson,P Griffith, L Grillo, O Grünberg,B Gui, E Gushchin,Yu Guz,T Gys, C Hadjivasiliou, G Haefeli, C Haen, S C Haines, S Hall,B Hamilton,T Hampson,X Han, S Hansmann-Menzemer, N Harnew, S T Harnew,J Harrison,J He,T Head, V Heijne,K Hennessy, P Henrard,L Henry,J A Hernando Morata,E van Herwijnen,M Heß,A Hicheur, D Hill, M Hoballah, C Hombach,W Hulsbergen,P Hunt,N Hussain, D Hutchcroft, D Hynds,M Idzik,P Ilten, R Jacobsson,A Jaeger, J Jalocha,E Jans, P Jaton,A Jawahery,F Jing,M John, D Johnson,C R Jones, C Joram, B Jost,N Jurik, M Kaballo,S Kandybei,W Kanso, M Karacson, T M Karbach,S Karodia,M Kelsey, I R Kenyon,T Ketel, B Khanji, C Khurewathanakul,S Klaver,K Klimaszewski, O Kochebina, M Kolpin,I Komarov, R F Koopman,P Koppenburg, M Korolev, A Kozlinskiy, L Kravchuk, K Kreplin, M Kreps, G Krocker,P Krokovny,F Kruse,W Kucewicz, M Kucharczyk,V Kudryavtsev, K Kurek, T Kvaratskheliya,V N La Thi, D Lacarrere, G Lafferty,A Lai,D Lambert, R W Lambert, G Lanfranchi, C Langenbruch,B Langhans,T Latham,C Lazzeroni,R Le Gac,J van Leerdam,J-P Lees,R Lefèvre, A Leflat, J Lefrançois,S Leo,O Leroy,T Lesiak, B Leverington,Y Li,T Likhomanenko,M Liles, R Lindner, C Linn, F Lionetto,B Liu, S Lohn, I 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Tisserand,M Tobin, S Tolk,L Tomassetti,D Tonelli, S Topp-Joergensen, N Torr,E Tournefier,S Tourneur,M T Tran,M Tresch, A Tsaregorodtsev,P Tsopelas,N Tuning,M Ubeda Garcia,A Ukleja,A Ustyuzhanin,U Uwer,C Vacca,V Vagnoni,G Valenti,A Vallier,R Vazquez Gomez,P Vazquez Regueiro,C Vázquez Sierra,S Vecchi, J J Velthuis,M Veltri,G Veneziano,M Vesterinen, B Viaud, D Vieira,M Vieites Diaz,X Vilasis-Cardona, A Vollhardt, D Volyanskyy, D Voong, A Vorobyev,V Vorobyev,C Voß,H Voss,J A de Vries, R Waldi,C Wallace,R Wallace, J Walsh, S Wandernoth,J Wang,D R Ward, N K Watson,D Websdale,M Whitehead, J Wicht,D Wiedner,G Wilkinson,M P Williams,M Williams, H W Wilschut, F F Wilson, J Wimberley, J Wishahi,W Wislicki,M Witek,G Wormser, S A Wotton,S Wright,K Wyllie,Y Xie,Z Xing,Z Xu,Z Yang,X Yuan, O Yushchenko,M Zangoli, M Zavertyaev,L Zhang,W C Zhang,Y Zhang, A Zhelezov,A Zhokhov,L Zhong,A Zvyagin

The European physical journal. C, Particles and fields（2015）

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摘要

The production of the [Formula: see text] state in proton-proton collisions is probed via its decay to the [Formula: see text] final state with the LHCb detector, in the rapidity range [Formula: see text] and in the meson transverse-momentum range [Formula: see text]. The cross-section for prompt production of [Formula: see text] mesons relative to the prompt [Formula: see text] cross-section is measured, for the first time, to be [Formula: see text] at a centre-of-mass energy [Formula: see text] using data corresponding to an integrated luminosity of 0.7 fb[Formula: see text], and [Formula: see text] at [Formula: see text] using 2.0 fb[Formula: see text]. The uncertainties quoted are, in order, statistical, systematic, and that on the ratio of branching fractions of the [Formula: see text] and [Formula: see text] decays to the [Formula: see text] final state. In addition, the inclusive branching fraction of [Formula: see text]-hadron decays into [Formula: see text] mesons is measured, for the first time, to be [Formula: see text], where the third uncertainty includes also the uncertainty on the [Formula: see text] inclusive branching fraction from [Formula: see text]-hadron decays. The difference between the [Formula: see text] and [Formula: see text] meson masses is determined to be [Formula: see text].

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