Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in <i>p</i>-Pb Collisions at √<i>s<sub>NN</sub></i>=5.02 TeV

Acharya, S, Adamova, D, Adolfsson, J, Aggarwal, MM, Rinella, G Aglieri, Agnello, M, Agrawal, N, Ahammed, Z, Ahn, SU, Aiola, S
et al (show 1002 more authors) (2019) Azimuthal Anisotropy of Heavy-Flavor Decay Electrons in <i>p</i>-Pb Collisions at √<i>s<sub>NN</sub></i>=5.02 TeV. PHYSICAL REVIEW LETTERS, 122 (7). 072301-.

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Angular correlations between heavy-flavor decay electrons and charged particles at midrapidity (|η|<0.8) are measured in p-Pb collisions at sqrt[s_{NN}]=5.02  TeV. The analysis is carried out for the 0%-20% (high) and 60%-100% (low) multiplicity ranges. The jet contribution in the correlation distribution from high-multiplicity events is removed by subtracting the distribution from low-multiplicity events. An azimuthal modulation remains after removing the jet contribution, similar to previous observations in two-particle angular correlation measurements for light-flavor hadrons. A Fourier decomposition of the modulation results in a positive second-order coefficient (v_{2}) for heavy-flavor decay electrons in the transverse momentum interval 1.5<p_{T}<4  GeV/c in high-multiplicity events, with a significance larger than 5σ. The results are compared with those of charged particles at midrapidity and those of inclusive muons at forward rapidity. The v_{2} measurement of open heavy-flavor particles at midrapidity in small collision systems could provide crucial information to help interpret the anisotropies observed in such systems.

Item Type: Article
Uncontrolled Keywords: ALICE Collaboration
Depositing User: Symplectic Admin
Date Deposited: 30 Apr 2019 09:37
Last Modified: 13 Oct 2023 17:09
DOI: 10.1103/PhysRevLett.122.072301
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