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 be
m chi(b1) (3P) = 10 511.3 +/- 1.7 +/- 2.5MeV/c(2),
where the first uncertainty is statistical and the second is systematic.
Original language | English |
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Article number | 3092 |
Pages (from-to) | 3092 |
Number of pages | 13 |
Journal | The European Physical Journal C |
Volume | 74 |
Issue number | 10 |
DOIs | |
Publication status | Published - 8 Oct 2014 |
Keywords / Materials (for Non-textual outputs)
- UPSILON PRODUCTION
- HEAVY-QUARKONIUM
- PROMPT CHI(C)
- J-PSI
- B-S(0)
- RATIO
- B-0