Measurements of jet observables sensitive to b-quark fragmentation in tt events at the LHC with the ATLAS detector

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dc.contributor.authorAad, G.
dc.contributor.authorAbbott, B.
dc.contributor.authorAbbott, D.C.
dc.contributor.authorAbed Abud, A.
dc.contributor.authorAbeling, K.
dc.contributor.authorAbhayasinghe, D.K.
dc.contributor.authorAbidi, S.H.
dc.contributor.authorAbouZeid, O.S.
dc.contributor.authorAbraham, N.L.
dc.contributor.authorAbramowicz, H.
dc.contributor.authorAbreu, H.
dc.contributor.authorAbulaiti, Y.
dc.contributor.authorAcharya, B.S.
dc.contributor.authorAchkar, B.
dc.contributor.authorAdam, L.
dc.contributor.authorAdam Bourdarios, C.
dc.contributor.authorAdamczyk, L.
dc.contributor.authorAdamek, L.
dc.contributor.authorAdelman, J.
dc.contributor.authorAdiguzel, A.
dc.contributor.authoret al.
dc.date.issued2022
dc.description.abstractSeveral observables sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb−1 of √s = 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.
dc.description.statementofresponsibilityAtlas Collaboration ... G. Aad ... P. Jackson ... H. Potti ... et al.
dc.identifier.citationPhysical Review D, 2022; 106(3):032008-1-032008-33
dc.identifier.doi10.1103/physrevd.106.032008
dc.identifier.issn2470-0010
dc.identifier.issn2470-0029
dc.identifier.orcidJackson, P. [0000-0002-0847-402X]
dc.identifier.orcidMcDougall, A.E. [0000-0001-7713-2800]
dc.identifier.orcidPotti, H. [0000-0002-0800-9902]
dc.identifier.orcidWhite, M.J. [0000-0001-5474-4580]
dc.identifier.urihttps://hdl.handle.net/2440/136702
dc.language.isoen
dc.publisherAmerican Physical Society (APS)
dc.rights© 2022 CERN, for the ATLAS Collaboration. ublished 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 SCOAP3.
dc.source.urihttps://doi.org/10.1103/physrevd.106.032008
dc.subjectQuark and gluon jets; Top quark; Multi-purpose particle detectors; Precision measurements
dc.titleMeasurements of jet observables sensitive to b-quark fragmentation in tt events at the LHC with the ATLAS detector
dc.typeJournal article
pubs.publication-statusPublished online

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