English

QCD resummation on single hadron transverse momentum distribution with the thrust axis

High Energy Physics - Phenomenology 2021-01-07 v1 High Energy Physics - Experiment Nuclear Experiment Nuclear Theory

Abstract

We derive the transverse momentum dependent (TMD) factorization and resummation formula of the unpolarized transverse momentum distribution (jTj_T) for the single hadron production with the thrust axis in electron-positron collision. Two different kinematic regions are considered, including small transverse momentum limit jTQj_T \ll Q, and joint transverse momentum and threshold limit jTQ(1zh)Qj_T \ll Q(1-z_h) \ll Q, where QQ and zhz_h are the hard scattering energy and the observed hadron momentum fraction. Using effective theory methods, we resum logarithms ln(Q/jT)\ln(Q/j_T) and ln(1zh)\ln(1-z_h) to all orders. In the end we present the differential cross sections and Gaussian widths calculated for the inclusive charged pion production and find that our results are consistent with the measurements reported by the Belle collaboration.

Keywords

Cite

@article{arxiv.2007.14425,
  title  = {QCD resummation on single hadron transverse momentum distribution with the thrust axis},
  author = {Zhong-Bo Kang and Ding Yu Shao and Fanyi Zhao},
  journal= {arXiv preprint arXiv:2007.14425},
  year   = {2021}
}

Comments

25 pages, 5 figures

R2 v1 2026-06-23T17:28:30.709Z