Abstract
We propose a collinear factorization formula for the associated production of one particle and a Drell-Yan pair in hadronic collisions. It is shown that additional collinear singularities appearing in the next-to-leading order calculations that can not be factorized into parton and fragmentation functions are systematically renormalized by introducing fracture functions. Next-to-leading order coefficient functions for cross-sections double differential in the fractional energy of the identified hadron and lepton pair invariant mass are presented.
Highlights
The description of particle production in hadronic collisions is interesting and challenging in many aspects
The collinear factorization formula was studied in Ref. [9] where we were mainly concerned with the study of hard diffractive processes in hadronic collisions
The latter are a special case of associated production in which the tagged hadron is a proton at very low transverse momentum and almost the energy of the incoming proton
Summary
The description of particle production in hadronic collisions is interesting and challenging in many aspects. In this paper we will study the semi-inclusive version of the Drell-Yan process, H1 + H2 → H + γ∗ + X, in which one particle is tagged in the final. [9] where we were mainly concerned with the study of hard diffractive processes in hadronic collisions. The latter are a special case of associated production in which the tagged hadron is a proton at very low transverse momentum and. Technical details and explicit formulas are collected in the appendix
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