Higgs boson production in high energy proton-nucleus collisions

Understand

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.