The b-bbar production cross section in 920 GeV proton-nucleus fixed target collisions is measured by observing double muonic decays of b-flavored hadrons in the kinematic region $-0.3<xF(mu)<0.15$. A total number of $76pm12$ b-bbar events is obtained with a likelihood fit of the signal and background simulated events to the data. The resulting cross section is $sigbb = 16.2 pm 2.5_{stat} pm 2.8_{sys} nbpn$, or, when combined with a previous Hera-B measurement of similar precision, $sigbb = 15.4 pm 1.7_{stat} pm 1.2_{sys}^{uncorr.} pm 1.9_{sys}^{corr.} nbpn$, which is consistent with recent NLO calculations.

Bottom production cross section from double muonic decays of b-hadrons in 920 GeV proton-nucleus collision

BERTIN, ANTONIO;DE CASTRO, STEFANO;FABBRI, LAURA;FACCIOLI, PIETRO;MASSA, IGNAZIO GIACOMO;PICCININI, MAURIZIO;SBRIZZI, ANTONIO;SEMPRINI CESARI, NICOLA;VILLA, MAURO;VITALE, ANTONIO;ZOCCOLI, ANTONIO
2007

Abstract

The b-bbar production cross section in 920 GeV proton-nucleus fixed target collisions is measured by observing double muonic decays of b-flavored hadrons in the kinematic region $-0.3<xF(mu)<0.15$. A total number of $76pm12$ b-bbar events is obtained with a likelihood fit of the signal and background simulated events to the data. The resulting cross section is $sigbb = 16.2 pm 2.5_{stat} pm 2.8_{sys} nbpn$, or, when combined with a previous Hera-B measurement of similar precision, $sigbb = 15.4 pm 1.7_{stat} pm 1.2_{sys}^{uncorr.} pm 1.9_{sys}^{corr.} nbpn$, which is consistent with recent NLO calculations.
I. ABT; M. ADAMS; M. AGARI; H. ALBRECHT; A. ALEKSANDROV; V. AMARAL; A. AMORIM; S.J. APLIN; V. AUSHEV; Y. BAGATURIA; V. BALAGURA; M. BARGIOTTI; O. BARSUKOVA; J. BASTOS; J. BATISTA; C. BAUER; T.S. BAUER; A. BELKOV; A. BELKOV; I. BELOTELOV; A. BERTIN; B. BOBCHENKO; M. BÖCKER; A. BOGATYREV; G. BOHM; M. BRÄUER; M. BRUINSMA; M. BRUSCHI; P. BUCHHOLZ; T. BURAN; J. CARVALHO; P. CONDE; C. CRUSE; M. DAM; K.M. DANIELSEN; M. DANILOV; S. DE CASTRO; H. DEPPE; X. DONG; H.B. DREIS; V. EGORYTCHEV; K. EHRET; F. EISELE; D. EMELIYANOV; S. ESSENOV; L. FABBRI; P. FACCIOLI; M. FEUERSTACK-RAIBLE; J. FLAMMER; B. FOMINYKH; M. FUNCKE; L. GARRIDO; A. GELLRICH; B. GIACOBBE; J. GLÄß; D. GOLOUBKOV; Y. GOLUBKOV; A. GOLUTVIN; I. GOLUTVIN; I. GORBOUNOV; A. GORISEK; O. GOUCHTCHINE; D.C. GOULART; S. GRADL; W. GRADL; F. GRIMALDI; J. GROTH-JENSEN; Y. GUILITSKY; J.D. HANSEN; J.M. HERNÁNDEZ; W. HOFMANN; M. HOHLMANN; T. HOTT; W. HULSBERGEN; U. HUSEMANN; O. IGONKINA; M. ISPIRYAN; T. JAGLA; C. JIANG; H. KAPITZA; S. KARABEKYAN; N. KARPENKO; S. KELLER; J. KESSLER; F. KHASANOV; Y. KIRYUSHIN; I. KISEL; E. KLINKBY; K.T. KNÖPFLE; H. KOLANOSKI; S. KORPAR; C. KRAUSS; P. KREUZER; P. KRIZAN; D. KRÜCKER; S. KUPPER; T. KVARATSKHELIIA; A. LANYOV; K. LAU; B. LEWENDEL; T. LOHSE; B. LOMONOSOV; R. MÄNNER; R. MANKEL; S. MASCIOCCHI; I. MASSA; I. MATCHIKHILIAN; G. MEDIN; M. MEDINNIS; M. MEVIUS; A. MICHETTI; Y. MIKHAILOV; R. MIZUK; R. MURESAN; M. ZUR NEDDEN; M. NEGODAEV; M. NÖRENBERG; S. NOWAK; M.T. NÚÑEZ PARDO DE VERA; M. OUCHRIF; F. OULD-SAADA; C. PADILLA; D. PERALTA; R. PERNACK; R. PESTOTNIK; B.A. PETERSEN; M. PICCININI; M.A. PLEIER; M. POLI; V. POPOV; D. POSE; S. PRYSTUPA; V. PUGATCH; Y. PYLYPCHENKO; J. PYRLIK; K. REEVES; D. REßING; H. RICK; I. RIU; P. ROBMANN; I. ROSTOVTSEVA; V. RYBNIKOV; F. SÁNCHEZ; A. SBRIZZI; M. SCHMELLING; B. SCHMIDT; A. SCHREINER; H. SCHRÖDER; U. SCHWANKE; A.J. SCHWARTZ; A.S. SCHWARZ; B. SCHWENNINGER; B. SCHWINGENHEUER; F. SCIACCA; N. SEMPRINI-CESARI; S. SHUVALOV; L. SILVA; L. SÖZÜER; S. SOLUNIN; A. SOMOV; S. SOMOV; J. SPENGLER; R. SPIGHI; A. SPIRIDONOV; A. STANOVNIK; M. STARIC; C. STEGMANN; H.S. SUBRAMANIA; M. SYMALLA; I. TIKHOMIROV; M. TITOV; I. TSAKOV; U. UWER; C. VAN ELDIK; Y. VASSILIEV; M. VILLA; A. VITALE; I. VUKOTIC; H. WAHLBERG; A.H. WALENTA; M. WALTER; J.J. WANG; D. WEGENER; U. WERTHENBACH; H. WOLTERS; R. WURTH; A. WURZ; Y. ZAITSEV; M. ZAVERTYAEV; T. ZEUNER; A. ZHELEZOV; Z. ZHENG; R. ZIMMERMANN; T. ZIVKO; A. ZOCCOLI
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/47333
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