Power corrections to TMD factorization for Z-boson production

Journal of High Energy Physics, May 2018

Abstract A typical factorization formula for production of a particle with a small transverse momentum in hadron-hadron collisions is given by a convolution of two TMD parton densities with cross section of production of the final particle by the two partons. For practical applications at a given transverse momentum, though, one should estimate at what momenta the power corrections to the TMD factorization formula become essential. In this paper we calculate the first power corrections to TMD factorization formula for Z-boson production and Drell-Yan process in high-energy hadron-hadron collisions. At the leading order in N c power corrections are expressed in terms of leading power TMDs by QCD equations of motion.

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I. Balitsky, A. Tarasov. Power corrections to TMD factorization for Z-boson production, Journal of High Energy Physics, 2018, 150, DOI: 10.1007/JHEP05(2018)150