Revisiting the $B_s^{(\ast )}$-Meson Production at the Hadronic Colliders

Abstract

The production of heavy-flavored hadron at the hadronic colliders provides a challenging opportunity to test the validity of pQCD predictions. There are two mechanisms for the $B_s^{(\ast )}$ hadroproduction, i.e. the gluon-gluon fusion mechanism via the subprocess $g+g\to B_s^{(\ast )}+b+\bar{s}$ and the extrinsic heavy quark mechanism via the subprocesses $g+\bar{b}\to B_s^{(\ast )}+\bar{s}$ and $g+s\to B_s^{(\ast )}+b$, both of which shall have sizable contributions in proper kinematic region. Different from the fixed-flavor-number scheme (FFNS) previously adopted in the literature, we study the $B_s^{(\ast )}$ hadroproduction under the general-mass variable-flavor-number scheme (GM-VFNS), in which we can consistently deal with the double counting problem from the above two mechanisms. Properties for the $B_s^{(\ast )}$ hadroproduction are discussed. To be useful reference, a comparative study of FFNS and GM-VFNS is presented. Both of which can provide reasonable estimations for the $B_s^{(\ast )}$ hadroproduction. At the Tevatron, the difference between these two schemes is small, however such difference is obvious at the LHC. The forthcoming more precise data on LHC shall provide a good chance to check which scheme is more appropriate to deal with the $B_s^{(\ast )}$-meson production and to further study the heavy quark components in hadrons.

18 pages, 8 figures, 4 tables. To match the published version. To be published in Eur.Phys.J.C

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Cited by in corpus (2)

• A review of the open charm and open bottom systems
• Photoproduction of the $B_c^{(\ast )}$ Meson at the LHeC