Measurement of the cross-section ratio $\sigma(\chi_{c2})/\sigma(\chi_{c1})$ for prompt $\chi_c$ production at $\sqrt{s}=7$ TeV

The LHCb collaboration
Phys.Lett.B 714 (2012) 215-223, 2012.

Abstract (data abstract)
CERN-LHC. Measurement of the ratio of cross sections for prompt charmonium $\chi_{c2}$ to $\chi_{c1}$ production in proton-proton interactions at a centre-of-mass energy of 7 TeV. The $\chi_c$ mesons, from a data sample of integrated luminosity of 36 pb$^{-1}$ collected during 2010, are identified through their decay $\chi_c \to J/\psi (\to \mu^+ \mu^-) \gamma$ covering the $J/\psi$ transverse momentum range 2-15 GeV/$c$ and rapidity 2.0 - 4.5.

  • Table 1

    Data from T 4,F 3

    10.17182/hepdata.59352.v1/t1

    Ratio of cross sections for $\chi_{c2}$ to $\chi_{c1}$ production in bins of $J/\psi$ transverse momentum over the $J/\psi$ rapidity range...

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