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Measurement of the top-quark mass using a leptonic invariant mass in pp collisions at √s = 13 TeV with the ATLAS detector ATLAS Collaboration
Abstract
A measurement of the top-quark mass (mt) in the tt¯→ lepton+jets channel is presented, with an experimental technique which exploits semileptonic decays of b-hadrons produced in the top-quark decay chain. The distribution of the invariant mass m`µ of the lepton, ` (with ` = e, µ), from the W-boson decay and the muon, µ, originating from the b-hadron decay is reconstructed, and a binned-template profile likelihood fit is performed to extract mt . The measurement is based on data corresponding to an integrated luminosity of 36.1 fb−1 of √ s = 13 TeV pp collisions provided by the Large Hadron Collider and recorded by the ATLAS detector. The measured value of the top-quark mass is mt = 174.41 ± 0.39 (stat.) ± 0.66 (syst.) ± 0.25 (recoil) GeV, where the third uncertainty arises from changing the Pythia8 parton shower gluon-recoil scheme, used in top-quark decays, to a recently developed setup.
Item Metadata
| Title |
Measurement of the top-quark mass using a leptonic invariant mass in pp collisions at √s = 13 TeV with the ATLAS detector
|
| Creator | |
| Publisher |
Springer Berlin Heidelberg
|
| Date Issued |
2023-06-05
|
| Description |
A measurement of the top-quark mass (mt) in the tt¯→ lepton+jets channel is
presented, with an experimental technique which exploits semileptonic decays of b-hadrons
produced in the top-quark decay chain. The distribution of the invariant mass m`µ of
the lepton, ` (with ` = e, µ), from the W-boson decay and the muon, µ, originating
from the b-hadron decay is reconstructed, and a binned-template profile likelihood fit is
performed to extract mt
. The measurement is based on data corresponding to an integrated
luminosity of 36.1 fb−1 of √
s = 13 TeV pp collisions provided by the Large Hadron Collider
and recorded by the ATLAS detector. The measured value of the top-quark mass is
mt = 174.41 ± 0.39 (stat.) ± 0.66 (syst.) ± 0.25 (recoil) GeV, where the third uncertainty
arises from changing the Pythia8 parton shower gluon-recoil scheme, used in top-quark
decays, to a recently developed setup.
|
| Subject | |
| Genre | |
| Type | |
| Language |
eng
|
| Date Available |
2023-09-12
|
| Provider |
Vancouver : University of British Columbia Library
|
| Rights |
Attribution 4.0 International (CC BY 4.0)
|
| DOI |
10.14288/1.0435853
|
| URI | |
| Affiliation | |
| Citation |
Journal of High Energy Physics. 2023 Jun 05;2023(6):19
|
| Publisher DOI |
10.1007/JHEP06(2023)019
|
| Peer Review Status |
Reviewed
|
| Scholarly Level |
Faculty; Researcher
|
| Copyright Holder |
The Author(s)
|
| Rights URI | |
| Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)