Measurement of b jet shapes in proton-proton collisions at $\sqrt{s} =$ 5.02 TeV

TL;DR

This paper measures the internal structure of b jets in proton-proton collisions at 5.02 TeV, providing new insights into jet substructure and particle yields associated with b quarks at this energy.

Contribution

It presents the first measurement of charged-hadron production and jet shapes specifically for b jets at 5.02 TeV, comparing results with models and inclusive jets.

Findings

Jet shape distributions differ between b jets and inclusive jets.

Charged-particle yields vary with angular distance from the jet axis.

Results show discrepancies with PYTHIA and HERWIG++ predictions.

Abstract

We present the first study of charged-hadron production associated with jets originating from b quarks in proton-proton collisions at a center-of-mass energy of 5.02 TeV. The data sample used in this study was collected with the CMS detector at the CERN LHC and corresponds to an integrated luminosity of 27.4 pb$^{-1}$. To characterize the jet substructure, the differential jet shapes, defined as the normalized transverse momentum distribution of charged hadrons as a function of angular distance from the jet axis, are measured for b jets. In addition to the jet shapes, the per-jet yields of charged particles associated with b jets are also quantified, again as a function of the angular distance with respect to the jet axis. Extracted jet shape and particle yield distributions for b jets are compared with results for inclusive jets, as well as with the predictions from the PYTHIA and HERWIG++ event generators.