Heavy quark jets at the LHC

TL;DR

This paper reviews measurements of heavy quark (b and c) jets at the LHC, testing QCD predictions and exploring heavy flavor production mechanisms, with implications for particle decay signatures and proton structure.

Contribution

It provides a comprehensive summary of heavy quark jet measurements at the LHC, including new insights into production channels and their agreement with theoretical models.

Findings

Good agreement with theory for two b-jet production

Discrepancies in single b-jet production at high pT

Insights into heavy flavor production mechanisms

Abstract

We summarize measurements of b and c jet production at the LHC, which are an important signature and background for decays of massive particles such as H-to-b-bbar. These include measurements of the inclusive and dijet production of heavy quark jets, b and c jets produced in association with vector bosons Z and W, and decays of boosted Z bosons into pairs of b-bbar. The current status of b tagging and b jet energy scale is also reviewed. These measurements test perturbative QCD in the four and five-flavor number schemes, and provide insight into the relative importance of heavy flavor production through flavor creation, flavor excitation and gluon splitting channels. The W+c measurement provides additionally a powerful way to probe the strange quark and antiquark sea in the proton. The recent studies looking separately at production of one and two b jets find generally good agreement with theory predictions for two b-jet production, while some discrepancies are observed for singly produced b jets, particularly at large b-jet pT , where gluon splitting becomes dominant.