Mass Resolution Corrections at the LHC

TL;DR

This paper discusses methods to improve jet mass resolution at the LHC by correcting for pileup effects, using energy flow and subsidiary information to mitigate the impact of multiple interactions.

Contribution

It introduces novel correction techniques that utilize energy flow and additional jet properties to enhance jet spectroscopy accuracy at high luminosity.

Findings

Improved jet mass resolution after applying correction methods

Effective reduction of pileup effects on jet measurements

Enhanced accuracy in dijet mass reconstruction

Abstract

The utility of jet spectroscopy at the LHC is compromised by the existence of multiple interactions within a bunch crossing. The energy deposits from these interactions at the design luminosity of the LHC may degrade the dijet mass resolution unless great care is taken. Energy clusters making up the jet can be required to have an energy flow with respect to the jet axis which resembles QCD. In addition, subsidiary information such as the jet mass or the out of jet cone mass or transverse momentum can be deployed so as to alleviate the adverse effects of pileup.