@article{3171289,
    title = "Elliptic flow of electrons from heavy-flavour hadron decays at
mid-rapidity in Pb-Pb collisions at root s(NN)=2.76 TeV",
    author = "Adam, J. and Adamova, D. and Aggarwal, M. M. and Rinella, G. Aglieri and and Agnello, M. and Agrawal, N. and Ahammed, Z. and Ahmad, S. and Ahn, S. U. and and Aiola, S. and Akindinov, A. and Alam, S. N. and Albuquerque, D. S. and D. and Aleksandrov, D. and Alessandro, B. and Alexandre, D. and Alfaro and Molina, R. and Alici, A. and Alkin, A. and Alme, J. and Alt, T. and and Altinpinar, S. and Altsybeev, I. and Alves Garcia Prado, C. and Andrei, and C. and Andronic, A. and Anguelov, V. and Anticic, T. and Antinori, F. and and Antonioli, P. and Aphecetche, L. and Appelshaeuser, H. and Arcelli, and S. and Arnaldi, R. and Arnold, O. W. and Arsene, I. C. and Arslandok, M. and and Audurier, B. and Augustinus, A. and Averbeck, R. and Azmi, M. D. and and Badala, A. and Baek, Y. W. and Bagnasco, S. and Bailhache, R. and Bala, and R. and Balasubramanian, S. and Baldisseri, A. and Baral, R. C. and and Barbano, A. M. and Barbera, R. and Barile, F. and Barnafoldi, G. 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C. and Zaporozhets, S. and and Zardoshti, N. and Zarochentsev, A. and Zavada, P. and Zaviyalov, N. and and Zbroszczyk, H. and Zgura, I. S. and Zhalov, M. and Zhang, H. and Zhang, and X. and Zhang, Y. and Zhang, C. and Zhang, Z. and Zhao, C. and Zhigareva, and N. and Zhou, D. and Zhou, Y. and Zhou, Z. and Zhu, H. and Zhu, J. and and Zichichi, A. and Zimmermann, A. and Zimmermann, M. B. and Zinovjev, G. and and Zyzak, M. and ALICE Collaboration",
    journal = "Journal of High Energy Physics",
    year = "2016",
    number = "9",
    publisher = "Springer-Verlag",
    issn = "1126-6708, 1029-8479",
    doi = "10.1007/JHEP09(2016)028",
    keywords = "Heavy Ion Experiments",
    abstract = "The elliptic flow of electrons from heavy-flavour hadron decays at
mid-rapidity (|y| < 0.7) is measured in Pb-Pb collisions at TeV with
ALICE at the LHC. The particle azimuthal distribution with respect to
the reaction plane can be parametrized with a Fourier expansion, where
the second coefficient (v (2)) represents the elliptic flow. The v (2)
coefficient of inclusive electrons is measured in three centrality
classes (0-10%, 10-20% and 20-40%) with the event plane and the
scalar product methods in the transverse momentum (p (T)) intervals
0.5-13 GeV/c and 0.5-8 GeV/c, respectively. After subtracting the
background, mainly from photon conversions and Dalitz decays of neutral
mesons, a positive v (2) of electrons from heavy-flavour hadron decays
is observed in all centrality classes, with a maximum significance of
5.9 sigma in the interval 2 < p (T) < 2.5 GeV/c in semi-central
collisions (20-40%). The value of v (2) decreases towards more central
collisions at low and intermediate p (T) (0.5 < p (T) < 3 GeV/c). The v
(2) of electrons from heavy-flavour hadron decays at mid-rapidity is
found to be similar to the one of muons from heavy-flavour hadron decays
at forward rapidity (2.5 < y < 4). The results are described within
uncertainties by model calculations including substantial elastic
interactions of heavy quarks with an expanding strongly-interacting
medium."
}