Higgs boson production in high energy proton-nucleus collisions

Abstract

We study Higgs boson production from gluon-gluon fusion at mid-rapidity in high energy proton-nucleus collisions. For this process the presently still little known gluon distribution function $h_1^{\perp g}$ gives a numerically relevant contribution. We show by explicite calculation that using CGC (color glass condensate) model input the result obtained in the naive k_t factorization approach matches the result obtained in the TMD factorization framework for a dilute medium. We also verify the earlier finding that the k_t factorization formalism for Higgs production breaks down in a dense medium. In doing so we formulate a hybrid model which allows one to treat such reactions theoretically.

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• TMD evolution and the Higgs transverse momentum distribution
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• Extra Spin Asymmetries From the Breakdown of TMD-Factorization in Hadron-Hadron Collisions
• TMD gluon distributions at small x in the CGC theory
• Impact of gluon polarization on Higgs plus jet production at the LHC
• TMD factorization and the gluon distribution in high energy QCD
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