W Boson Inclusive Decays to Quarkonium at the LHC

Details W Boson Inclusive Decays to Quarkonium at the LHC W Boson Inclusive Decays to Quarkonium at the LHC

2011-03-06

arxiv.org/abs/1103.1106v4

Physics

High Energy Physics

High Energy Physics - Phenomenology

Updated to match the published version in EPJC

Scientific paper

In this paper, the production rates of quarkonia eta_c, J/psi, eta_b, Upsilon, B_c and B_c^* through W boson decay at the LHC are calculated, at the leading order in both the QCD coupling constant and in v, the typical velocity of the heavy quark inside of mesons. It shows that a sizable number of quarkonia from W boson decay will be produced at the LHC. Comparison with the predictions by using quark fragmentation mechanism is also discussed. Results show that, for the charmonium production through W decay, the difference between predictions by the fragmentation mechanism and complete leading order calculation is around 3%, and it is insensitive to the uncertainties of theoretical parameters; however, for the bottomonium and B_c^(*) productions, the difference cannot be ignored as the fragmentation mechanism is less applicable here due to the relatively large ratio mb/mw.

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