Abstract
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 v2 is observed for muons from charm decays, while the v2 value for muons from bottom decays is consistent with zero within uncertainties.
Original language | English |
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Article number | 082301 |
Number of pages | 20 |
Journal | Physical Review Letters |
Volume | 124 |
Issue number | 8 |
Early online date | 26 Feb 2020 |
DOIs | |
Publication status | Published - 28 Feb 2020 |
Bibliographical 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 http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2018-23Keywords
- hep-ex
- nucl-ex