Heavy quarkonium fragmentation functions from a heavy quark pair. II. P wave

作者：Ma Yan Qing^*; Qiu Jian Wei; Zhang Hong

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, 89(9): 094030.

DOI：10.1103/PhysRevD.89.094030

Recently, a new perturbative QCD factorization formalism for heavy quarkonium production at a large transverse momentum was proposed. The phenomenological application of this new approach relies on our knowledge of a large number of universal fragmentation functions (FFs) at an input factorization scale mu(0) greater than or similar to 2m(Q) with heavy quark mass m(Q), which are nonperturbative, and in principle, should be extracted from data. With heavy quark mass m(Q) >> Lambda(QCD), we calculate these input FFs in terms of nonrelativistic QCD (NRQCD) factorization. We derive contributions to these input FFs through all S-wave NRQCD Q (Q) over bar states in a companion paper [Y. -Q. Ma, J. -W. Qiu, and H. Zhang, arXiv:1311.7078 [Phys. Rev. D (to be published)]]. In this paper, we calculate the contributions to the heavy quark-pair FFs from all P-wave NRQCD Q (Q) over bar states.

• 出版日期2014-5-29