Gluon fragmentation into $B_c^{(\ast )}$ in NRQCD factorization

Abstract

The universal fragmentation functions of gluon into the flavored quarkonia $B_c$ and (polarized) $B_c^{\ast }$ are computed within NRQCD factorization framework, at the lowest order in velocity expansion and strong coupling constant. It is mandatory to invoke the DGLAP renormalization program to render the NRQCD short-distance coefficients UV finite in a point-wise manner. The calculation is facilitated with the sector decomposition method, with the final results presented with high numerical accuracy. This knowledge is useful to enrich our understanding toward the large-$p_T$ behavior of $B_c^{(\ast )}$ production at LHC experiment.

arXiv commentComments: 13 pages, 3 figures, 1 table. arXiv admin note: text overlap with arXiv:1810.04138

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