Study of chi(b) meson production in pp collisions at root s=7 and 8 TeV and observation of the decay chi(b) (3P) -> gamma(3S)gamma

LHCb collaboration

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Abstract

A study of chi(b) 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 root s = 7 and 8 TeV. The fraction of gamma(nS) mesons originating from chi(b) decays is measured as a function of the gamma transverse momentum in the rapidity range 2.0 < y(gamma) < 4.5. The radiative transition of the chi(b) (3P) meson to gamma(3S) is observed for the first time. The chi(b)1 (3P) mass is determined to bem chi(b1) (3P) = 10 511.3 +/- 1.7 +/- 2.5MeV/c(2),where the first uncertainty is statistical and the second is systematic.
Original languageEnglish
Article number3092
Number of pages13
JournalEuropean Physical Journal C
Volume74
Issue number10
DOIs
Publication statusPublished - 8 Oct 2014
Externally publishedYes

Keywords

  • UPSILON PRODUCTION
  • PROMPT CHI(C)
  • J-PSI
  • B-S(0)
  • RATIO
  • B-0

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