STI Publications - View Publication Form #16017

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Publication Information
Title Lepton Angular Distribution of Z boson production and jet discrimination
Abstract High precision data of lepton angular distributions in inclusive Z boson production, reported by the CMS and ATLAS Collaborations, showed pronounced transverse momentum (qT) dependencies of the A0 and A2 coefficients. Violation of the Lam-Tung relation, A0=A2, was also found. An intuitive understanding of these results can be obtained from a geometric approach. We predict that A0 and A2 for Z plus single gluon-jet events are very different from that of Z plus single quark-jet events, allowing a new experimental tool for checking various algorithms which attempt to discriminate quark jets from gluon jets. We also predict that the Lam-Tung relation would be more severely violated for the Z plus multiple-jet data that what has been observed so far for inclusive Z production data. These predictions can be readily tested using existing LHC data.
Author(s) Evan McClellan, Jen-chieh Peng, W. Chang, Oleg Teryaev
Publication Date October 2019
Document Type Journal Article
Primary Institution Thomas Jefferson National Accelerator Facility, Newport News
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP), U.S. National Science Foundation, Ministry of Science and Technology of Taiwan
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-19-2985 OSTI Number: 1564236
LANL Number: arXiv:1907.10483 Other Number: DOE/OR/23177-4744
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding Yes
LDRD Number(s)
2019-LDRD-13
Journal Article
Journal Name Physics Letters B
Refereed Yes
Volume 797
Issue
Page(s) 134895
Attachments/Datasets/DOI Link
Document(s)
lt4.pdf (STI Document)
1-s2.0-S0370269319306094-main.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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