Forward W + c, b-jet and Top Measurements with LHCb

TL;DR

This paper presents the development and validation of inclusive c and b-jet tagging algorithms at LHCb, applying them to measure charge asymmetries and production ratios of W+c,b-jet events, as well as the forward top production cross-section, all consistent with the standard model.

Contribution

The paper introduces new inclusive c and b-jet tagging algorithms optimized for LHCb and demonstrates their application in measuring key electroweak and top production processes.

Findings

Jet-tagging algorithms show high efficiency and accuracy.

Measured W+c,b-jet charge asymmetries align with standard model.

Forward top production cross-section agrees with predictions.

Abstract

Inclusive c and b-jet tagging algorithms have been developed to utilize the excellent secondary vertex reconstruction and resolution capabilities of the LHCb detector. The validation and performance of these tagging algorithms are reported using the full run 1 LHCb dataset at 7 and 8 TeV. Jet-tagging has been applied to muon+jet final states to measure both the W+c,b-jet charge asymmetries and the ratios of W+c,b-jet to W+jet and W+jet to Z+jet production. The forward top production cross-section is also measured using the muon+b-jet final. All results are found to be consistent with standard model predictions.