1994/12/06 by K. Kołodziej, A. Leike, R. Rückl · 1 citation
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/0370-2693(95)00121-z
published as Phys.Lett.B348:219-225,1995 · 10 pages Latex, 6 postscript figures (included by epsf)
arxiv created 1994/12/06 · openalex publication_date 1995/03/01 · arxiv updated 2011/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Using photon-photon collisions as a particularly transparent study case we investigate the production mechanisms for Bc mesons. In nonrelativistic approximation and to O(α2αs2) it is shown that recombination of b- and c-quarks dominates by far over b and c fragmentation. This dominance persists up to the highest accessible transverse momenta and leads to distributions in energy which differ completely from the spectra expected on the basis of the fragmentation functions. For processes in which a b b-pair is radiated from a primary c-quark, the fragmentation description is found to be inadequate. We anticipate important implications of these results for hadronic production of heavy quark resonances. Using realistic photon spectra we predict two-photon production rates for Bc and Bc^* at present and future e+e--machines.