Probing parton saturation with forward $Z^0$-boson production at small transverse momentum in p+p and p+A collisions

Abstract

We calculate and compare the differential cross sections for forward $Z^0$-boson production at small transverse momentum, in proton-proton and proton-nucleus collisions, using both the collinear and dilute-dense factorization frameworks. In both cases, we implement a Sudakov resummation of the large logarithms generated by soft-gluon emissions, which is essential in order to describe the transverse momentum distribution of forward $Z^0$ bosons measured at the Tevatron and the LHC. We further compute the nuclear modification factor in the dilute-dense framework, hoping to single out signals of saturation effects at small values of $x$. Our predictions are compared with those obtained in the collinear factorization framework, using two different nuclear parton distribution functions.

References added. Published version

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Cited by in corpus (8)

• Isolated photon-hadron production in high energy $pp$ and $pA$ collisions at RHIC and LHC
• Harmonics of Parton Saturation in Lepton-Jet Correlations at the EIC
• Sudakov effects in central-forward dijet production in high energy factorization
• Energy evolution of T-odd gluon TMDs at small $x$
• Trijets in kt-factorisation: matrix elements vs parton shower
• Exploring non-perturbative Sudakov factor via $Z^0$-boson production in $pp$ collisions
• Dijet photoproduction at low $x$ at next-to-leading order and its back-to-back limit
• Photoproduction of three jets in the CGC: gluon TMDs and dilute limit