Measurements of low-p T electrons from semileptonic heavy-flavour hadron decays at mid-rapidity in pp and Pb-Pb collisions at √sNN=2.76 TeV

The ALICE collaboration

doi:10.1007/JHEP10(2018)061

Measurements of low-p _T electrons from semileptonic heavy-flavour hadron decays at mid-rapidity in pp and Pb-Pb collisions at √sNN=2.76 TeV

The ALICE collaboration

Sección de Física

CERN
Variable Energy Cyclotron Centre
University of California at Berkeley
Czech Academy of Sciences
Lund University
Panjab University
Polytechnic University of Turin
Indian Institute of Technology Bombay
Korea Institute of Science and Technology Information
Yale University
Alikhanov Institute for Theoretical and Experimental Physics
GSI Helmholtz Centre for Heavy Ion Research
Universidade Estadual de Campinas
Russian Research Centre Kurchatov Institute
National Institute for Nuclear Physics
Universidad Nacional Autónoma de México
COMSATS University Islamabad
Enrico Fermi Center
NASU - Bogolyubov Institute for Theoretical Physics
University of Bergen
Goethe University Frankfurt
St. Petersburg State University
Central China Normal University
Horia Hulubei National Institute of Physics and Nuclear Engineering
University of Birmingham
University of Münster
Heidelberg University
Creighton University
Ruder Boskovic Institute
University of Houston
Lawrence Berkeley National Laboratory
Nantes Université
Technical University of Munich
Technische Universität München
University of Oslo
Aligarh Muslim University
Gangneung-Wonju National University
Inha University
University of Jammu
Commissariat à l’énergie atomique et aux énergies alternatives
University of Bonn
Homi Bhabha National Institute
Hungarian Academy of Sciences
STFC Daresbury Laboratory
Centre de calcul de l'IN2P3
Wayne State University
Joint Institute for Nuclear Research
University of Copenhagen
Utrecht University
Université de Strasbourg
Benemerita Universidad Autonoma de Puebla
Universidad Autonoma de Sinaloa
Moscow Engineering Physics Institute
RAS - Saint Petersburg Nuclear Physics Institute
University of Tennessee, Knoxville
Gauhati University
Henryk Niewodniczanski Institute of Nuclear Physics of the Polish Academy of Sciences
Faculty of Nuclear Sciences and Physical Engineering
Bose Institute
University of Texas at Austin
University of Pavia
Pavol Jozef Šafárik University
University of Brescia
University of Liverpool
Universidade de São Paulo
University of Helsinki
All-Russian Scientific Research Institute of Experimental Physics
Austrian Academy of Sciences
University of Tsukuba
National Research Foundation
Ohio State University
Technical University of Kosice
National Institute for Subatomic Physics
Pontificia Universidad Católica del Perú
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear
University of Jyväskylä
Universite Claude Bernard Lyon 1
Pusan National University
University of Cape Town
Slovak Academy of Sciences
Université Grenoble Alpes
Oak Ridge National Laboratory
University of Eastern Piedmont
Universidade Federal do ABC
Institute for Space Sciences
Indian Institute of Technology Indore
National Centre for Nuclear Research
University of Zagreb
Institute for High Energy Physics
RAS - Institute for Nuclear Research
National and Kapodistrian University of Athens
Chicago State University
Universidade Federal do Rio Grande do Sul
University of Split
Warsaw University of Technology
A. Alikhanian Yerevan Institute of Physics
The University of Tokyo
Nagasaki Institute of Applied Science
Western Norway University of Applied Sciences
Centro de Investigacion y de Estudios Avanzados del Instituto Politécnico Nacional
Sejong University
Yonsei University
KTO Karatay University
Zentrum für Technologietransfer und Telekommunikation (ZTT)
Jeonbuk National University
California Polytechnic State University, San Luis Obispo
Suranaree University of Technology
University of South-Eastern Norway
China National Nuclear Corporation
Lomonosov Moscow State University
University of the Witwatersrand
University of Foggia
University of Rome La Sapienza
Comenius University
RAS - Budker Institute of Nuclear Physics
University of Rajasthan
University of Wrocław
National Nuclear Research Center
University of Tübingen
Hiroshima University
Nara Women's University
Chinese Academy of Sciences
Indonesian Institute of Sciences

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18 Citas (Scopus)

Resumen

Transverse-momentum (p_T) differential yields of electrons from semileptonic heavy-flavour hadron decays have been measured in the most central (0–10%) and in semi-central (20–40%) Pb–Pb collisions at sNN=2.76 TeV. The corresponding production cross section in pp collisions has been measured at the same energy with substantially reduced systematic uncertainties with respect to previously published results. The modification of the yield in Pb–Pb collisions with respect to the expectation from an incoherent superposition of nucleon-nucleon collisions is quantified at mid-rapidity (|y| < 0.8) in the p_T interval 0.5–3 GeV/c via the nuclear modification factor, R_AA. This paper extends the p_T reach of the R_AA measurement towards significantly lower values with respect to a previous publication. In Pb–Pb collisions the p_T-differential measurements of yields at low p_T are essential to investigate the scaling of heavy-flavour production with the number of binary nucleon-nucleon collisions. Heavy-quark hadronization, a collective expansion and even initial-state effects, such as the nuclear modification of the Parton Distribution Function, are also expected to have a significant effect on the measured distribution.

Idioma original	Inglés
Número de artículo	61
Publicación	Journal of High Energy Physics
Volumen	2018
N.º	10
DOI	https://doi.org/10.1007/JHEP10(2018)061
Estado	Publicada - 1 oct. 2018

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10.1007/JHEP10(2018)061

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title = "Measurements of low-p T electrons from semileptonic heavy-flavour hadron decays at mid-rapidity in pp and Pb-Pb collisions at √sNN=2.76 TeV",

abstract = "Transverse-momentum (pT) differential yields of electrons from semileptonic heavy-flavour hadron decays have been measured in the most central (0–10\%) and in semi-central (20–40\%) Pb–Pb collisions at sNN=2.76 TeV. The corresponding production cross section in pp collisions has been measured at the same energy with substantially reduced systematic uncertainties with respect to previously published results. The modification of the yield in Pb–Pb collisions with respect to the expectation from an incoherent superposition of nucleon-nucleon collisions is quantified at mid-rapidity (|y| < 0.8) in the pT interval 0.5–3 GeV/c via the nuclear modification factor, RAA. This paper extends the pT reach of the RAA measurement towards significantly lower values with respect to a previous publication. In Pb–Pb collisions the pT-differential measurements of yields at low pT are essential to investigate the scaling of heavy-flavour production with the number of binary nucleon-nucleon collisions. Heavy-quark hadronization, a collective expansion and even initial-state effects, such as the nuclear modification of the Parton Distribution Function, are also expected to have a significant effect on the measured distribution.",

keywords = "Heavy Ion Experiments",

author = "\{The ALICE collaboration\} and S. Acharya and Acosta, \{F. T.\} and D. Adamov{\'a} and J. Adolfsson and Aggarwal, \{M. M.\} and \{Aglieri Rinella\}, G. and M. Agnello and N. Agrawal and Z. Ahammed and Ahn, \{S. U.\} and S. Aiola and A. Akindinov and M. Al-Turany and Alam, \{S. N.\} and Albuquerque, \{D. S.D.\} and D. Aleksandrov and B. Alessandro and \{Alfaro Molina\}, R. and Y. Ali and A. Alici and A. Alkin and J. Alme and T. Alt and L. Altenkamper and I. Altsybeev and Anaam, \{M. N.\} and C. Andrei and D. Andreou and Andrews, \{H. A.\} and A. Andronic and M. Angeletti and V. Anguelov and C. Anson and T. Anti{\v c}i{\'c} and F. Antinori and P. Antonioli and R. Anwar and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and S. Arcelli and R. Arnaldi and Arnold, \{O. W.\} and Arsene, \{I. C.\} and M. Arslandok and A. Augustinus and R. Averbeck and Azmi, \{M. D.\} and \{Bazo Alba\}, \{J. L.\} and Gago, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2018, The Author(s).",

year = "2018",

month = oct,

day = "1",

doi = "10.1007/JHEP10(2018)061",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics",

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T1 - Measurements of low-p T electrons from semileptonic heavy-flavour hadron decays at mid-rapidity in pp and Pb-Pb collisions at √sNN=2.76 TeV

AU - The ALICE collaboration

AU - Acharya, S.

AU - Acosta, F. T.

AU - Adamová, D.

AU - Adolfsson, J.

AU - Aggarwal, M. M.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahn, S. U.

AU - Aiola, S.

AU - Akindinov, A.

AU - Al-Turany, M.

AU - Alam, S. N.

AU - Albuquerque, D. S.D.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfaro Molina, R.

AU - Ali, Y.

AU - Alici, A.

AU - Alkin, A.

AU - Alme, J.

AU - Alt, T.

AU - Altenkamper, L.

AU - Altsybeev, I.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andreou, D.

AU - Andrews, H. A.

AU - Andronic, A.

AU - Angeletti, M.

AU - Anguelov, V.

AU - Anson, C.

AU - Antičić, T.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anwar, R.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arnold, O. W.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Azmi, M. D.

AU - Bazo Alba, J. L.

AU - Gago, A. M.

PY - 2018/10/1

Y1 - 2018/10/1

N2 - Transverse-momentum (pT) differential yields of electrons from semileptonic heavy-flavour hadron decays have been measured in the most central (0–10%) and in semi-central (20–40%) Pb–Pb collisions at sNN=2.76 TeV. The corresponding production cross section in pp collisions has been measured at the same energy with substantially reduced systematic uncertainties with respect to previously published results. The modification of the yield in Pb–Pb collisions with respect to the expectation from an incoherent superposition of nucleon-nucleon collisions is quantified at mid-rapidity (|y| < 0.8) in the pT interval 0.5–3 GeV/c via the nuclear modification factor, RAA. This paper extends the pT reach of the RAA measurement towards significantly lower values with respect to a previous publication. In Pb–Pb collisions the pT-differential measurements of yields at low pT are essential to investigate the scaling of heavy-flavour production with the number of binary nucleon-nucleon collisions. Heavy-quark hadronization, a collective expansion and even initial-state effects, such as the nuclear modification of the Parton Distribution Function, are also expected to have a significant effect on the measured distribution.

AB - Transverse-momentum (pT) differential yields of electrons from semileptonic heavy-flavour hadron decays have been measured in the most central (0–10%) and in semi-central (20–40%) Pb–Pb collisions at sNN=2.76 TeV. The corresponding production cross section in pp collisions has been measured at the same energy with substantially reduced systematic uncertainties with respect to previously published results. The modification of the yield in Pb–Pb collisions with respect to the expectation from an incoherent superposition of nucleon-nucleon collisions is quantified at mid-rapidity (|y| < 0.8) in the pT interval 0.5–3 GeV/c via the nuclear modification factor, RAA. This paper extends the pT reach of the RAA measurement towards significantly lower values with respect to a previous publication. In Pb–Pb collisions the pT-differential measurements of yields at low pT are essential to investigate the scaling of heavy-flavour production with the number of binary nucleon-nucleon collisions. Heavy-quark hadronization, a collective expansion and even initial-state effects, such as the nuclear modification of the Parton Distribution Function, are also expected to have a significant effect on the measured distribution.

KW - Heavy Ion Experiments

UR - https://www.scopus.com/pages/publications/85055109747

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DO - 10.1007/JHEP10(2018)061

M3 - Article

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SN - 1126-6708

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

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