Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in pp collisions at √s=13 TeV with the ATLAS detector

Research output: Contribution to journalArticlepeer-review


  • ATLAS Collaboration

Colleges, School and Institutes


The elliptic flow of muons from the decay of charm and bottom hadrons is measured in pp collisions at √s=13 TeV using a data sample with an integrated luminosity of 150 pb-1 recorded by the ATLAS detector at the LHC. The muons from heavy-flavor decay are separated from light-hadron decay muons using momentum imbalance between the tracking and muon spectrometers. The heavy-flavor decay muons are further separated into those from charm decay and those from bottom decay using the distance-of-closest-approach to the collision vertex. The measurement is performed for muons in the transverse momentum range 4-7 GeV and pseudorapidity range |η|<2.4. A significant nonzero elliptic anisotropy coefficient vis observed for muons from charm decays, while the vvalue for muons from bottom decays is consistent with zero within uncertainties.

Bibliographic note

27 pages in total, author list starting page 11, 4 figures, submitted to Phys. Rev. Lett. All figures including auxiliary figures are available at


Original languageEnglish
Article number082301
Number of pages20
JournalPhysical Review Letters
Issue number8
Early online date26 Feb 2020
Publication statusPublished - 28 Feb 2020


  • nucl-ex, hep-ex