Phenomenological implications of the intrinsic charm in the $Z$ boson production at the LHC

Abstract

In this paper we study the $Z$, $Z+$ jet, $Z+c$ and $Z+c+$ jet production in $pp$ collisions at the LHC considering different models for an intrinsic charm content of the proton. We analyse the impact of the intrinsic charm in the rapidity and transverse momentum distributions for these different processes. Our results indicated that differently from the other processes, the $Z+c$ cross section is strongly affected by the presence of the intrinsic charm. Moreover, we propose the analysis of the ratios $R(Z+c/Z)\equiv \sigma (Z+c)/\sigma (Z)$ and $R(Z+c/Z+\mbox{jet}) \equiv σ(Z+c)/σ(Z+\mbox{jet})$ and demonstrate that these observables can be used as a probe of the intrinsic charm.

7 pages, 6 figures. Version published in European Physical Journal C

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• The persistent nonperturbative charm enigma
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• Study of $Z$ bosons produced in association with charm in the forward region
• Intrinsic charm contribution to the prompt atmospheric neutrino flux
• NNLO QCD predictions for Z-boson production in association with a charm jet within the LHCb fiducial region
• Intrinsic charm content of the nucleon and charmness-nucleon sigma term
• Probing proton intrinsic charm in photon or Z boson production accompanied by heavy jets at LHC
• Measurement of associated Z + charm production in proton-proton collisions at $\sqrt{s}=$ 8 TeV
• $D$ - meson production at very forward rapidities: estimating the intrinsic charm contribution
• Parton distribution functions and constraints on the intrinsic charm content of the proton using BHPS approach
• The impact of intrinsic charm on the parton distribution functions
• The uncertainty of parton distribution functions due to physical observables in a global analysis