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

The LHCb Collaboration

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)


The production of χb(1P) mesons in pp collisions at a centre-of-mass energy of 7TeV is studied using 32 pb−1 of data collected with the LHCb detector. The χb(1P) mesons are reconstructed in the decay mode χb(1P) → ϒ (1S) γ → μ+μγ. The fraction of ϒ (1S) originating from χb(1P) decays in the ϒ (1S) transverse momentum range 6 < pTϒ(1S) < 15GeV/c and rapidity range 2.0 < yϒ(1S) < 4.5 is measured to be (20.7 ± 5.7 ± 2.1+2.7−5.4)%, 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.

Original languageEnglish
Article number31
Number of pages15
JournalJournal of High Energy Physics
Issue number11
Publication statusPublished - 8 Nov 2012
Externally publishedYes


  • Hadron-Hadron Scattering

Cite this