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Measurement of the fraction of Υ(1S) originating from χb(1P) decays in pp collisions at s√=7 TeV

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)031
Number of pages1
JournalJournal of High Energy Physics
Early online date3 Sep 2012
Publication statusPublished - Nov 2012


The production of χb(1P ) mesons in pp collisions at a centre-of-mass energy of 7 TeV is studied using 32 pb−1 of data collected with the LHCb detector. The χb(1P ) mesons are reconstructed in the decay mode χ b (1P ) → Υ (1S)γ → μ + μ −γ. The fraction of Υ (1S) originating from χb(1P ) decays in the Υ (1S) transverse momentum range 6 < pT Υ (1S) < 15 GeV/c and rapidity range 2.0 < y Υ (1S) < 4.5 is measured to be TeX , where the first uncertainty is statistical, the second is systematic and the last gives the range of the result due to the unknown Υ (1S) and χb(1P) polarizations.

ID: 7602908