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Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in Pb+Pb collisions at √s_NN = 5.02 TeV with the ATLAS detectorстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 28 октября 2020 г.
- Авторы: Denisov S.P., Gladilin L.K., Korotkova N.A., Kramarenko V.A., Meshkov O.V., Sinetckii V.V., Sivoklokov S.Yu, Smirnova L.N., Turchikhin S.M., ATLAS Collaboration
- Журнал: Physics Letters B
- Том: 807
- Номер: 135595
- Год издания: 2020
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1
- Последняя страница: 23
- DOI: 10.1016/j.physletb.2020.135595
- Аннотация: Azimuthal anisotropies of muons from charm and bottom hadron decays are measured in Pb+Pb collisions at √sNN=5.02 TeV. The data were collected with the ATLAS detector at the Large Hadron Collider in 2015 and 2018 with integrated luminosities of 0.5nb−1and 1.4nb−1, respectively. The kinematic selection for heavy-flavor muons requires transverse momentum 4 <pT<30 GeV and pseudorapidity |η| <2.0. The dominant sources of muons in this pTrange 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 pTand 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.
- Добавил в систему: Гладилин Леонид Константинович