Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at sNN=5.02 TeV 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.date.accessioned2021-09-20T20:25:38Z
dc.date.available2021-09-20T20:25:38Z
dc.date.issued2020-08
dc.description.abstractAzimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at sNN=5.02TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with integrated luminosities of 0.5nb−1 and 1.4nb−1, respectively. The kinematic selection for heavy-flavor muons requires transverse momentum 4T<30GeV and pseudorapidity |η|<2.0. The dominant sources of muons in this pT range are semi-leptonic decays of charm and bottom hadrons. These heavy-flavor muons are separated from light-hadron decay muons and punch-through hadrons using the momentum imbalance between the measurements in the tracking detector and in the muon spectrometers. Azimuthal anisotropies, quantified by flow coefficients, are measured via the event-plane method for inclusive heavy-flavor muons as a function of the muon pT and in intervals of Pb+Pb collision centrality. Heavy-flavor muons are separated into contributions from charm and bottom hadron decays using the muon transverse impact parameter with respect to the event primary vertex. Non-zero elliptic (v2) and triangular (v3) flow coefficients are extracted for charm and bottom muons, with the charm muon coefficients larger than those for bottom muons for all Pb+Pb collision centralities. The results indicate substantial modification to the charm and bottom quark angular distributions through interactions in the quark-gluon plasma produced in these Pb+Pb collisions, with smaller modifications for the bottom quarks as expected theoretically due to their larger mass. © 2020 The Author(s)es
dc.description.sponsorshipIndexación: Scopuses
dc.identifier.citationPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics Open Access Volume 80710 August 2020 Article number 135595es
dc.identifier.issn03702693
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/20335
dc.language.isoenes
dc.publisherElsevier B.V.es
dc.titleMeasurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at sNN=5.02 TeV with the ATLAS detectores
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