A study of χb meson production at LHCb is performed on proton–proton collision data, corresponding to 3.0 fb^−1 of integrated luminosity collected at centre-of-mass energies √s = 7 and 8 TeV. The fraction of Υ(nS) mesons originating from χb decays is measured as a function of the Υ transverse momentum in the rapidity range 2.0 < y^Υ < 4.5. The radiative transition of the χb(3P) meson to Υ(3S) is observed for the first time. The χb1(3P) mass is determined to be m_χb1(3P) = 10511.3 ± 1.7 ± 2.5 MeV/c2, where the first uncertainty is statistical and the second is systematic.

R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Study of χb Meson Production in pp Collisions at √s = 7 and 8 TeV and Observation of the Decay χb(3P) → Υ(3S) γ. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 74(10), 1-13 [10.1140/epjc/s10052-014-3092-z].

Study of χb Meson Production in pp Collisions at √s = 7 and 8 TeV and Observation of the Decay χb(3P) → Υ(3S) γ

CARBONE, ANGELO;GALLI, DOMENICO;MOGGI, NICCOLO';MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

A study of χb meson production at LHCb is performed on proton–proton collision data, corresponding to 3.0 fb^−1 of integrated luminosity collected at centre-of-mass energies √s = 7 and 8 TeV. The fraction of Υ(nS) mesons originating from χb decays is measured as a function of the Υ transverse momentum in the rapidity range 2.0 < y^Υ < 4.5. The radiative transition of the χb(3P) meson to Υ(3S) is observed for the first time. The χb1(3P) mass is determined to be m_χb1(3P) = 10511.3 ± 1.7 ± 2.5 MeV/c2, where the first uncertainty is statistical and the second is systematic.
2014
R. Aaij, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, S. Akar, et al. (2014). Study of χb Meson Production in pp Collisions at √s = 7 and 8 TeV and Observation of the Decay χb(3P) → Υ(3S) γ. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 74(10), 1-13 [10.1140/epjc/s10052-014-3092-z].
R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; S. Akar; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/428972
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