In this work, we investigate subleading power effects in Drell-Yan and Higgs production processes. We discuss the emergence of collinear functions, a critical new ingredient to factorization at next-to-leading power. We derive the factorization theorem valid near the kinematic threshold of the partonic processes in the diagonal and off-diagonal channels. We calculate the collinear functions and the soft functions at one and two loops, respectively. Using renormalization group methods, we perform leading logarithmic resummation for the diagonal channels.
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In this work, we investigate subleading power effects in Drell-Yan and Higgs production processes. We discuss the emergence of collinear functions, a critical new ingredient to factorization at next-to-leading power. We derive the factorization theorem valid near the kinematic threshold of the partonic processes in the diagonal and off-diagonal channels. We calculate the collinear functions and the soft functions at one and two loops, respectively. Using renormalization group methods, we perform...
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