Study of quark and gluon jet substructure in dijet and $\text{Z}$+jet events from $\text{p}\text{p}$ collisions - INSPIRE

DataBETA

Study of quark and gluon jet substructure in dijet and $\text{Z}$ +jet events from $\text{p}\text{p}$ collisions

CMS

Collaboration

2021

48 pages

Report number:

CMS-PAS-SMP-20-010

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

reference search6 citations

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Abstract:

A measurement of jet substructure observables describing the distribution of particles within quark- and gluon-initiated jets is presented in this note. Proton-proton collision data at

\sqrt{s}=13~\mathrm{TeV}

collected by the CMS detector are used, corresponding to an integrated luminosity of

35.9~\mathrm{fb}^{-1}

. A set of generalized angularities with varying sensitivity to the distributions of transverse momenta and angular distances within a jet are studied. The analysis is carried out using a dijet event sample enriched in gluon-initiated jets, and, for the first time, also a

\text{Z}

+jet event sample enriched in quark-initiated jets. The measurement is carried out in bins of jet transverse momentum, and as a function of jet size parameter, for multiple observables with and without a jet grooming procedure applied. Using these measurements, the ability of various models to describe jet substructure observables is studied, showing the clear need for improvements in Monte Carlo generators.

Note:

Preliminary results

Monte-Carlo
p p: scattering
p p: colliding beams
jet: pair production
Z0: associated production
jet: transverse momentum
transverse momentum: momentum spectrum
gluon: jet
quark: jet
structure

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