Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1996-02-27
Phys.Rev. D54 (1996) 4344-4348
Physics
High Energy Physics
High Energy Physics - Phenomenology
14 Pages, Latex File, 3 figures
Scientific paper
10.1103/PhysRevD.54.4344
A comparative study of the full $\alpha_s^4$ perturbative QCD calculation of the hadronic production of the $B_c$ and $B_c^*$ mesons and the fragmentation approximation is presented. We examined the various subprocesses in detail and the distribution $C(z)$, where $z$ is twice the fraction of the $B_c$ or $B_c^*$ meson energy in the center of mass of the subprocess, which proved insightful and revealed the importance of certain non-fragmentation contributions. We concluded that the condition for the applicability of the fragmentation approximation in hadronic collisions is that the transverse momentum $P_T$ of the produced $B_c$ and $B_c^*$ be much larger than the mass of the $B_c$ meson; i.e., $P_T\gg M_{B_c}$. Numerical results for the cross sections at the Fermilab Tevatron are also presented using updated parton distribution functions with various kinematic cuts.
Chang Chao-Hsi
Chen Yu-Qi
Oakes Robert J.
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