Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector - INSPIRE

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Measurement of azimuthal anisotropy of muons from charm and bottom hadrons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

ATLAS

Collaboration

Sep 4, 2019

20 pages

Published in:

Phys.Rev.Lett. 124 (2020) 8, 082301

Published: Feb 27, 2020

e-Print:

1909.01650 [nucl-ex]

DOI:

10.1103/PhysRevLett.124.082301

Report number:

CERN-EP-2019-166

Experiments:

CERN-LHC-ATLAS

View in:

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Abstract: (APS)

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.

Note:

27 pages in total, author list starting page 11, 4 figures, published in Phys. Rev. Lett. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2018-23

Nuclear Physics
angular distribution: anisotropy
charm: decay
bottom: decay
heavy quark: decay
p p: scattering
muon: spectrometer
ATLAS
transverse momentum
CERN LHC Coll

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