Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV

J. Adam; D. Adamova; M.M. Aggarwal; G.A. Rinella; Maria Agnello; N. Agrawal; Z. Ahammed; N. Ahmad; S. U. Ahn; S. Aiola; A. Akindinov; SN Alam; DSD Albuquerque; D. Aleksandrov; A. Alkin; Ian Bearden; Christian Alexander Bourjau; Marek Chojnacki; Christian Holm Christensen; Jens Jørgen Gaardhøje; Katarina Gajdosova; Kristjan Herlache Gulbrandsen; Børge Svane Nielsen; Vojtech Pacik; Lais Ozelin de Lima Pimentel; Valentina Zaccolo; You Zhou

doi:10.1016/j.physletb.2017.05.060

Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV

J. Adam, D. Adamova, M.M. Aggarwal, G.A. Rinella, Maria Agnello, N. Agrawal, Z. Ahammed, N. Ahmad, S. U. Ahn, S. Aiola, A. Akindinov, SN Alam, DSD Albuquerque, D. Aleksandrov, A. Alkin, Ian Bearden, Christian Alexander Bourjau, Marek Chojnacki, Christian Holm Christensen, Jens Jørgen GaardhøjeKatarina Gajdosova, Kristjan Herlache Gulbrandsen, Børge Svane Nielsen, Vojtech Pacik, Lais Ozelin de Lima Pimentel, Valentina Zaccolo, You Zhou

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Abstract

Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy s_NN=2.76 TeV. The transverse momentum (p_T) differential production yields at mid-rapidity were used to calculate the nuclear modification factor R_AA in the interval 3<p_T<18 GeV/c. The R_AA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb–Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50–80%) collisions is observed. The suppression of electrons in this broad p_T interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.

Originalsprog	Engelsk
Tidsskrift	Physics Letters B
Vol/bind	771
Sider (fra-til)	476-481
ISSN	0370-2693
DOI	https://doi.org/10.1016/j.physletb.2017.05.060
Status	Udgivet - 10 aug. 2017

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10.1016/j.physletb.2017.05.060

1-s2.0-S0370269317304239-mainForlagets udgivne version, 1,44 MBLicens: CC BY

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Adam, J., Adamova, D., Aggarwal, M. M., Rinella, G. A., Agnello, M., Agrawal, N., Ahammed, Z., Ahmad, N., U. Ahn, S., Aiola, S., Akindinov, A., Alam, SN., Albuquerque, DSD., Aleksandrov, D., Alkin, A., Bearden, I., Bourjau, C. A., Chojnacki, M., Christensen, C. H., ... Zhou, Y. (2017). Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV. Physics Letters B, 771, 476-481. https://doi.org/10.1016/j.physletb.2017.05.060

Adam, J, Adamova, D, Aggarwal, MM, Rinella, GA, Agnello, M, Agrawal, N, Ahammed, Z, Ahmad, N, U. Ahn, S, Aiola, S, Akindinov, A, Alam, SN, Albuquerque, DSD, Aleksandrov, D, Alkin, A, Bearden, I, Bourjau, CA, Chojnacki, M, Christensen, CH , Gaardhøje, JJ, Gajdosova, K, Gulbrandsen, KH , Nielsen, BS, Pacik, V, Pimentel, LODL, Zaccolo, V & Zhou, Y 2017, 'Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV', Physics Letters B, bind 771, s. 476-481. https://doi.org/10.1016/j.physletb.2017.05.060

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title = "Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV",

abstract = "Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy sNN=2.76 TeV. The transverse momentum (pT) differential production yields at mid-rapidity were used to calculate the nuclear modification factor RAA in the interval 3<pT<18 GeV/c. The RAA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb–Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50–80%) collisions is observed. The suppression of electrons in this broad pT interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.",

author = "J. Adam and D. Adamova and M.M. Aggarwal and G.A. Rinella and Maria Agnello and N. Agrawal and Z. Ahammed and N. Ahmad and {U. Ahn}, S. and S. Aiola and A. Akindinov and SN Alam and DSD Albuquerque and D. Aleksandrov and A. Alkin and Ian Bearden and Bourjau, {Christian Alexander} and Marek Chojnacki and Christensen, {Christian Holm} and Gaardh{\o}je, {Jens J{\o}rgen} and Katarina Gajdosova and Gulbrandsen, {Kristjan Herlache} and Nielsen, {B{\o}rge Svane} and Vojtech Pacik and Pimentel, {Lais Ozelin de Lima} and Valentina Zaccolo and You Zhou",

year = "2017",

month = aug,

day = "10",

doi = "10.1016/j.physletb.2017.05.060",

language = "English",

volume = "771",

pages = "476--481",

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

issn = "0370-2693",

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T1 - Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV

AU - Adam, J.

AU - Adamova, D.

AU - Aggarwal, M.M.

AU - Rinella, G.A.

AU - Agnello, Maria

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, N.

AU - U. Ahn, S.

AU - Aiola, S.

AU - Akindinov, A.

AU - Alam, SN

AU - Albuquerque, DSD

AU - Aleksandrov, D.

AU - Alkin, A.

AU - Bearden, Ian

AU - Bourjau, Christian Alexander

AU - Chojnacki, Marek

AU - Christensen, Christian Holm

AU - Gaardhøje, Jens Jørgen

AU - Gajdosova, Katarina

AU - Gulbrandsen, Kristjan Herlache

AU - Nielsen, Børge Svane

AU - Pacik, Vojtech

AU - Pimentel, Lais Ozelin de Lima

AU - Zaccolo, Valentina

AU - Zhou, You

PY - 2017/8/10

Y1 - 2017/8/10

N2 - Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy sNN=2.76 TeV. The transverse momentum (pT) differential production yields at mid-rapidity were used to calculate the nuclear modification factor RAA in the interval 3<pT<18 GeV/c. The RAA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb–Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50–80%) collisions is observed. The suppression of electrons in this broad pT interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.

AB - Electrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb–Pb collisions at a centre-of-mass of energy sNN=2.76 TeV. The transverse momentum (pT) differential production yields at mid-rapidity were used to calculate the nuclear modification factor RAA in the interval 3<pT<18 GeV/c. The RAA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb–Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50–80%) collisions is observed. The suppression of electrons in this broad pT interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb–Pb collisions at LHC.

U2 - 10.1016/j.physletb.2017.05.060

DO - 10.1016/j.physletb.2017.05.060

M3 - Journal article

SN - 0370-2693

VL - 771

SP - 476

EP - 481

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

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

ER -

Measurement of the production of high-p(T) electrons from heavy-flavour hadron decays in Pb-Pb collisions at root s(NN)=2.76 TeV

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