Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-04-27
Eur.Phys.J.C71:1687,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 2 figures, version to appear in EPJC
Scientific paper
10.1140/epjc/s10052-011-1687-1
We discuss the applicability of the $k_T$ factorization theorem to low-$p_T$ hadron production in hadron-hadron collision in a simple toy model, which involves only scalar particles and gluons. It has been shown that the $k_T$ factorization for high-$p_T$ hadron hadroproduction is broken by soft gluons in the Glauber region, which are exchanged among a transverse-momentum-dependent (TMD) parton density and other subprocesses of the collision. We explain that the contour of a loop momentum can be deformed away from the Glauber region at low $p_T$, so the above residual infrared divergence is factorized by means of the standard eikonal approximation. The $k_T$ factorization is then restored in the sense that a TMD parton density maintains its universality. Because the resultant Glauber factor is independent of hadron flavors, experimental constraints on its behavior are possible. The $k_T$ factorization can also be restored for the transverse single-spin asymmetry in hadron-hadron collision at low $p_T$ in a similar way, with the residual infrared divergence being factorized into the same Glauber factor.
Chang Chun-peng
Li Hsiang-nan
No associations
LandOfFree
Restoration of $k_T$ factorization for low $p_T$ hadron hadroproduction does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Restoration of $k_T$ factorization for low $p_T$ hadron hadroproduction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Restoration of $k_T$ factorization for low $p_T$ hadron hadroproduction will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-322773