Journal article

### Measurement of the cross-section ratio σ(χ c2)/σ(χ c1) for prompt χ c production at s=7 TeV

Abstract:

The prompt production of the charmonium χ c1 and χ c2 mesons has been studied in proton-proton collisions at the Large Hadron Collider at a centre-of-mass energy of s=7 TeV. The χ c mesons are identified through their decays χ c→J/ψγ with J/ψ→μ +μ - using 36 pb -1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for the two χ c spin states, σ(χ c2)/σ(χ c1), has been determined as a function of the J/ψ transverse momentum, pTJ/ψ, in the range fr...

### Authors

Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume:
714
Issue:
2-5
Pages:
215-223
Publication date:
2012-08-14
DOI:
ISSN:
0370-2693
URN:
Source identifiers:
345236
Local pid:
pubs:345236