Hadronic Production of $chi_c$-mesons at LHC

Hadronic production of $P$-wave charmonium states $χ_{cJ}$ in hadronic interaction is considered. Using experimental results of CDF and LHCb collaborations we show, that contributions of color-singlet components are dominant. As for color-octet mechanism, we show, that contributions from $P$-wave states can also be observed, while $S$-wave states can be neglected. The best experimental observables that give information about relative importance of color-singlet and color-octet components are the ratios $χ_{c2}/χ_{c1}$ and $χ_{c0}/χ_{c1}$.

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