Butterworth, Jonathan;
ATLAS Collaboration;
(2022)
Measurements of jet observables sensitive to b-quark fragmentation
in t¯t events at the LHC with the ATLAS detector.
Physical Review D
, 106
, Article 032008. 10.1103/PhysRevD.106.032008.
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Abstract
Several observables sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb−1 of ffiffi s p ¼ 13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Jets containing b hadrons are obtained from a sample of dileptonic t¯t events, and the associated set of chargedparticle tracks is separated into those from the primary pp interaction vertex and those from the displaced b-decay secondary vertex. This division is used to construct observables that characterize the longitudinal and transverse momentum distributions of the b hadron within the jet. The measurements have been corrected for detector effects and provide a test of heavy-quark-fragmentation modeling at the LHC in a system where the top-quark decay products are color connected to the proton beam remnants. The unfolded distributions are compared with the predictions of several modern Monte Carlo parton-shower generators and generator tunes, and a wide range of agreement with the data is observed, with p values varying from 5 × 10−4 to 0.98. These measurements complement similar measurements from eþe− collider experiments in which the b quarks originate from a color singlet Z=γ.
| Type: | Article |
|---|---|
| Title: | Measurements of jet observables sensitive to b-quark fragmentation in t¯t events at the LHC with the ATLAS detector |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.106.032008 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.106.032008 |
| Language: | English |
| Additional information: | Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10153901 |
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