Study of quark and gluon jet substructure in Z plus jet and dijet events from pp collisions
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Author(s)
Type
Journal Article
Abstract
Measurements of jet substructure describing the composition of quark- and
gluon-initiated jets are presented. Proton-proton (pp) collision data at √
s = 13 TeV
collected with the CMS detector are used, corresponding to an integrated luminosity of
35.9 fb−1
. Generalized angularities are measured that characterize the jet substructure
and distinguish quark- and gluon-initiated jets. These observables are sensitive to the
distributions of transverse momenta and angular distances within a jet. The analysis is
performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the
first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter.
Each measurement is repeated applying a “soft drop” grooming procedure that removes
soft and large angle radiation from the jet. Using these measurements, the ability of various
models to describe jet substructure is assessed, showing a clear need for improvements in
Monte Carlo generators.
gluon-initiated jets are presented. Proton-proton (pp) collision data at √
s = 13 TeV
collected with the CMS detector are used, corresponding to an integrated luminosity of
35.9 fb−1
. Generalized angularities are measured that characterize the jet substructure
and distinguish quark- and gluon-initiated jets. These observables are sensitive to the
distributions of transverse momenta and angular distances within a jet. The analysis is
performed using a data sample of dijet events enriched in gluon-initiated jets, and, for the
first time, a Z+jet event sample enriched in quark-initiated jets. The observables are measured in bins of jet transverse momentum, and as a function of the jet radius parameter.
Each measurement is repeated applying a “soft drop” grooming procedure that removes
soft and large angle radiation from the jet. Using these measurements, the ability of various
models to describe jet substructure is assessed, showing a clear need for improvements in
Monte Carlo generators.
Date Issued
2022-01-31
Online Publication Date
2022-02-23T09:55:10Z
Date Acceptance
2022-01-08
Citation
The Journal of High Energy Physics, 2022, 2022 (1), pp.1-54
ISSN
1029-8479
Publisher
Scuola Internazionale Superiore di Studi Avanzati (SISSA)
Start Page
1
End Page
54
Journal / Book Title
The Journal of High Energy Physics
Volume
2022
Issue
1
Copyright Statement
© 2022 The Author(s). Open Access . This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
License URI
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000750848900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Hadron-Hadron Scattering
Jet Physics
FRAGMENTATION
Publication Status
Published
Article Number
ARTN 188
Date Publish Online
2022-01-31