Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV

J. Adam; D. Adamova; M.M. Aggarwal; G. Aglieri Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; S. U. Ahn; S. Aiola; A. Akindinov; S. Alam; B. Alessandro; A. Alici; Ian Bearden; Hans Bøggild; Christian Holm Christensen; Kristjan Herlache Gulbrandsen; Jens Jørgen Gaardhøje; Hans Hjersing Dalsgaard; Børge Svane Nielsen; Alexander Colliander Hansen; Ante Bilandzic; Marek Chojnacki; Valentina Zaccolo; You Zhou; Christian Alexander Bourjau

doi:10.1016/j.physletb.2015.11.059

Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV

J. Adam, D. Adamova, M.M. Aggarwal, G. Aglieri Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, S. U. Ahn, S. Aiola, A. Akindinov, S. Alam, B. Alessandro, A. Alici, Ian Bearden, Hans Bøggild, Christian Holm Christensen, Kristjan Herlache Gulbrandsen, Jens Jørgen Gaardhøje, Hans Hjersing Dalsgaard, Børge Svane NielsenAlexander Colliander Hansen, Ante Bilandzic, Marek Chojnacki, Valentina Zaccolo, You Zhou, Christian Alexander Bourjau

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Abstract

The elliptic flow, v₂, of muons from heavy-flavour hadron decays at forward rapidity (2.5<y<4) is measured in Pb–Pb collisions at s_NN=2.76 TeV with the ALICE detector at the LHC. The scalar product, two- and four-particle Q cumulants and Lee–Yang zeros methods are used. The dependence of the v₂ of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, p_T, is studied in the interval 3<p_T<10 GeV/c. A positive v₂ is observed with the scalar product and two-particle Q cumulants in semi-central collisions (10–20% and 20–40% centrality classes) for the p_T interval from 3 to about 5 GeV/c with a significance larger than 3σ based on the combination of statistical and systematic uncertainties. The v₂ magnitude tends to decrease towards more central collisions and with increasing p_T. It becomes compatible with zero in the interval 6<p_T<10 GeV/c. The results are compared to models describing the interaction of heavy quarks and open heavy-flavour hadrons with the high-density medium formed in high-energy heavy-ion collisions.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	753
Sider (fra-til)	41-56
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2015.11.059
Status	Udgivet - 10 feb. 2016

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10.1016/j.physletb.2015.11.059

1-s2.0-S0370269315009156-mainForlagets udgivne version, 757 KBLicens: CC BY

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Adam, J., Adamova, D., Aggarwal, M. M., Aglieri Rinella, G., Agnello, M., Agrawal, N., Ahammed, Z., U. Ahn, S., Aiola, S., Akindinov, A., Alam, S., Alessandro, B., Alici, A., Bearden, I., Bøggild, H., Christensen, C. H., Gulbrandsen, K. H., Gaardhøje, J. J., Dalsgaard, H. H., ... Bourjau, C. A. (2016). Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV. Physics Letters B, 753, 41-56. https://doi.org/10.1016/j.physletb.2015.11.059

Adam, J, Adamova, D, Aggarwal, MM, Aglieri Rinella, G, Agnello, M, Agrawal, N, Ahammed, Z, U. Ahn, S, Aiola, S, Akindinov, A, Alam, S, Alessandro, B, Alici, A, Bearden, I , Bøggild, H , Christensen, CH , Gulbrandsen, KH , Gaardhøje, JJ, Dalsgaard, HH, Nielsen, BS, Hansen, AC, Bilandzic, A, Chojnacki, M, Zaccolo, V, Zhou, Y & Bourjau, CA 2016, 'Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV', Physics Letters B, bind 753, s. 41-56. https://doi.org/10.1016/j.physletb.2015.11.059

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title = "Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV",

abstract = "The elliptic flow, v2, of muons from heavy-flavour hadron decays at forward rapidity (2.5NN=2.76 TeV with the ALICE detector at the LHC. The scalar product, two- and four-particle Q cumulants and Lee–Yang zeros methods are used. The dependence of the v2 of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, pT, is studied in the interval 3T<10 GeV/c. A positive v2 is observed with the scalar product and two-particle Q cumulants in semi-central collisions (10–20% and 20–40% centrality classes) for the pT interval from 3 to about 5 GeV/c with a significance larger than 3σ based on the combination of statistical and systematic uncertainties. The v2 magnitude tends to decrease towards more central collisions and with increasing pT. It becomes compatible with zero in the interval 6T<10 GeV/c. The results are compared to models describing the interaction of heavy quarks and open heavy-flavour hadrons with the high-density medium formed in high-energy heavy-ion collisions.",

author = "J. Adam and D. Adamova and M.M. Aggarwal and {Aglieri Rinella}, G. and Maria Agnello and N. Agrawal and Z. Ahammed and {U. Ahn}, S. and S. Aiola and A. Akindinov and S. Alam and B. Alessandro and A. Alici and Ian Bearden and Hans B{\o}ggild and Christensen, {Christian Holm} and Gulbrandsen, {Kristjan Herlache} and Gaardh{\o}je, {Jens J{\o}rgen} and Dalsgaard, {Hans Hjersing} and Nielsen, {B{\o}rge Svane} and Hansen, {Alexander Colliander} and Ante Bilandzic and Marek Chojnacki and Valentina Zaccolo and You Zhou and Bourjau, {Christian Alexander}",

year = "2016",

month = feb,

day = "10",

doi = "10.1016/j.physletb.2015.11.059",

language = "English",

volume = "753",

pages = "41--56",

journal = "Physics Letters B: Particle Physics, Nuclear Physics and Cosmology",

issn = "0370-2693",

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T1 - Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV

AU - Adam, J.

AU - Adamova, D.

AU - Aggarwal, M.M.

AU - Aglieri Rinella, G.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, S.

AU - Alessandro, B.

AU - Alici, A.

AU - Bearden, Ian

AU - Bøggild, Hans

AU - Christensen, Christian Holm

AU - Gulbrandsen, Kristjan Herlache

AU - Gaardhøje, Jens Jørgen

AU - Dalsgaard, Hans Hjersing

AU - Nielsen, Børge Svane

AU - Hansen, Alexander Colliander

AU - Bilandzic, Ante

AU - Chojnacki, Marek

AU - Zaccolo, Valentina

AU - Zhou, You

AU - Bourjau, Christian Alexander

PY - 2016/2/10

Y1 - 2016/2/10

N2 - The elliptic flow, v2, of muons from heavy-flavour hadron decays at forward rapidity (2.5NN=2.76 TeV with the ALICE detector at the LHC. The scalar product, two- and four-particle Q cumulants and Lee–Yang zeros methods are used. The dependence of the v2 of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, pT, is studied in the interval 3T<10 GeV/c. A positive v2 is observed with the scalar product and two-particle Q cumulants in semi-central collisions (10–20% and 20–40% centrality classes) for the pT interval from 3 to about 5 GeV/c with a significance larger than 3σ based on the combination of statistical and systematic uncertainties. The v2 magnitude tends to decrease towards more central collisions and with increasing pT. It becomes compatible with zero in the interval 6T<10 GeV/c. The results are compared to models describing the interaction of heavy quarks and open heavy-flavour hadrons with the high-density medium formed in high-energy heavy-ion collisions.

AB - The elliptic flow, v2, of muons from heavy-flavour hadron decays at forward rapidity (2.5NN=2.76 TeV with the ALICE detector at the LHC. The scalar product, two- and four-particle Q cumulants and Lee–Yang zeros methods are used. The dependence of the v2 of muons from heavy-flavour hadron decays on the collision centrality, in the range 0–40%, and on transverse momentum, pT, is studied in the interval 3T<10 GeV/c. A positive v2 is observed with the scalar product and two-particle Q cumulants in semi-central collisions (10–20% and 20–40% centrality classes) for the pT interval from 3 to about 5 GeV/c with a significance larger than 3σ based on the combination of statistical and systematic uncertainties. The v2 magnitude tends to decrease towards more central collisions and with increasing pT. It becomes compatible with zero in the interval 6T<10 GeV/c. The results are compared to models describing the interaction of heavy quarks and open heavy-flavour hadrons with the high-density medium formed in high-energy heavy-ion collisions.

U2 - 10.1016/j.physletb.2015.11.059

DO - 10.1016/j.physletb.2015.11.059

M3 - Journal article

SN - 0370-2693

VL - 753

SP - 41

EP - 56

JO - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

JF - Physics Letters B: Particle Physics, Nuclear Physics and Cosmology

ER -

Elliptic flow of muons from heavy-flavour hadron decays at forward rapidity in Pb-Pb collisions at root s(NN)=2.76TeV

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