Non-Gaussian elliptic-flow fluctuations in PbPb collisions at sNN=5.02TeV

doi:10.1016/j.physletb.2018.11.063

Non-Gaussian elliptic-flow fluctuations in PbPb collisions at s_NN=5.02TeV

A. Alikhanian Yerevan Institute of Physics
Austrian Academy of Sciences
TU Wien
Belarusian State University
Vrije Universiteit Brussel
Universidade do Estado do Rio de Janeiro
Université libre de Bruxelles
Peking University
Ghent University
Université Paris-Saclay
Université catholique de Louvain
Centro Brasileiro de Pesquisas Físicas
Universidade Estadual de Campinas
Universidade Federal de Pelotas
Universidade Estadual Paulista Júlio de Mesquita Filho
Universidade Federal do ABC
Bulgarian Academy of Sciences
Sofia University St. Kliment Ohridski
Beihang University
CAS - Institute of High Energy Physics
Universidad de los Andes Colombia
University of Split
Ruder Boskovic Institute
Alikhanov Institute for Theoretical and Experimental Physics
University of Cyprus
Joint Institute for Nuclear Research
Charles University
Universidad San Francisco de Quito
Helwan University
Kyungpook National University
Academy of Scientific Research and Technology
Texas A&M University at Qatar
The British University in Egypt
Mimar Sinan Guzel Sanatlar University
National Institute of Chemical Physics and Biophysics, Tallinn
University of Helsinki
Lappeenranta-Lahti University of Technology
Université de Haute-Alsace
Universite Claude Bernard Lyon 1
Lomonosov Moscow State University
Ivane Javakhishvili Tbilisi State University
Georgian Technical University
RWTH Aachen University
CERN
German Electron Synchrotron
University of Hamburg
Brandenburg University of Technology
Demokritos National Centre for Scientific Research
National and Kapodistrian University of Athens
National Technical University of Athens
University of Ioannina
Eötvös Loránd University
Wigner Research Centre for Physics
Institute for Nuclear Research
University of Debrecen
Indian Institute of Science Bangalore
Indian Institute of Technology Bhubaneswar
National Institute of Science Education and Research
Institute of Physics Bhubaneswar
Panjab University
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Saha Institute of Nuclear Physics
Indian Institute of Technology Madras
Tata Institute of Fundamental Research
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56 Citas (Scopus)

Resumen

Event-by-event fluctuations in the elliptic-flow coefficient v₂ are studied in PbPb collisions at s_NN=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v₂) for charged particles with transverse momentum 0.3<p_T<3.0GeV/c and pseudorapidity |η|<1.0 are determined for different collision centrality classes. The moments of the p(v₂) distributions are used to calculate the v₂ coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v₂) distributions indicate non-Gaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.

Idioma original	Inglés
Páginas (desde-hasta)	643-665
Número de páginas	23
Publicación	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volumen	789
DOI	https://doi.org/10.1016/j.physletb.2018.11.063
Estado	Publicada - 10 feb. 2019
Publicado de forma externa	Sí

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@article{5d612014d11e4539abbfffd1e0ec8391,

title = "Non-Gaussian elliptic-flow fluctuations in PbPb collisions at sNN=5.02TeV",

abstract = "Event-by-event fluctuations in the elliptic-flow coefficient v2 are studied in PbPb collisions at sNN=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2) for charged particles with transverse momentum 0.3T<3.0GeV/c and pseudorapidity |η|<1.0 are determined for different collision centrality classes. The moments of the p(v2) distributions are used to calculate the v2 coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v2) distributions indicate non-Gaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.",

keywords = "Event-by-event elliptic flow, Non-Gaussian flow fluctuations, Unfolding",

author = "Sirunyan, \{A. M.\} and A. Tumasyan and W. Adam and F. Ambrogi and E. Asilar and T. Bergauer and J. Brandstetter and E. Brondolin and M. Dragicevic and J. Er{\"o} and M. Flechl and M. Friedl and R. Fr{\"u}hwirth and Ghete, \{V. M.\} and J. Grossmann and J. Hrubec and M. Jeitler and A. K{\"o}nig and N. Krammer and I. Kr{\"a}tschmer and D. Liko and T. Madlener and I. Mikulec and E. Pree and N. Rad and H. Rohringer and J. Schieck and R. Sch{\"o}fbeck and M. Spanring and D. Spitzbart and W. Waltenberger and J. Wittmann and Wulz, \{C. E.\} and M. Zarucki and V. Chekhovsky and V. Mossolov and \{Suarez Gonzalez\}, J. and \{Abu Zeid\}, S. and F. Blekman and J. D'Hondt and \{De Bruyn\}, I. and \{De Clercq\}, J. and K. Deroover and G. Flouris and D. Lontkovskyi and S. Lowette and I. Marchesini and S. Moortgat and L. Moreels and \{Sanchez Rosas\}, \{L. J.\}",

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

year = "2019",

month = feb,

day = "10",

doi = "10.1016/j.physletb.2018.11.063",

language = "English",

volume = "789",

pages = "643--665",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

}

TY - JOUR

T1 - Non-Gaussian elliptic-flow fluctuations in PbPb collisions at sNN=5.02TeV

AU - Sirunyan, A. M.

AU - Tumasyan, A.

AU - Adam, W.

AU - Ambrogi, F.

AU - Asilar, E.

AU - Bergauer, T.

AU - Brandstetter, J.

AU - Brondolin, E.

AU - Dragicevic, M.

AU - Erö, J.

AU - Flechl, M.

AU - Friedl, M.

AU - Frühwirth, R.

AU - Ghete, V. M.

AU - Grossmann, J.

AU - Hrubec, J.

AU - Jeitler, M.

AU - König, A.

AU - Krammer, N.

AU - Krätschmer, I.

AU - Liko, D.

AU - Madlener, T.

AU - Mikulec, I.

AU - Pree, E.

AU - Rad, N.

AU - Rohringer, H.

AU - Schieck, J.

AU - Schöfbeck, R.

AU - Spanring, M.

AU - Spitzbart, D.

AU - Waltenberger, W.

AU - Wittmann, J.

AU - Wulz, C. E.

AU - Zarucki, M.

AU - Chekhovsky, V.

AU - Mossolov, V.

AU - Suarez Gonzalez, J.

AU - Abu Zeid, S.

AU - Blekman, F.

AU - D'Hondt, J.

AU - De Bruyn, I.

AU - De Clercq, J.

AU - Deroover, K.

AU - Flouris, G.

AU - Lontkovskyi, D.

AU - Lowette, S.

AU - Marchesini, I.

AU - Moortgat, S.

AU - Moreels, L.

AU - Sanchez Rosas, L. J.

PY - 2019/2/10

Y1 - 2019/2/10

N2 - Event-by-event fluctuations in the elliptic-flow coefficient v2 are studied in PbPb collisions at sNN=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2) for charged particles with transverse momentum 0.3T<3.0GeV/c and pseudorapidity |η|<1.0 are determined for different collision centrality classes. The moments of the p(v2) distributions are used to calculate the v2 coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v2) distributions indicate non-Gaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.

AB - Event-by-event fluctuations in the elliptic-flow coefficient v2 are studied in PbPb collisions at sNN=5.02 TeV using the CMS detector at the CERN LHC. Elliptic-flow probability distributions p(v2) for charged particles with transverse momentum 0.3T<3.0GeV/c and pseudorapidity |η|<1.0 are determined for different collision centrality classes. The moments of the p(v2) distributions are used to calculate the v2 coefficients based on cumulant orders 2, 4, 6, and 8. A rank ordering of the higher-order cumulant results and nonzero standardized skewness values obtained for the p(v2) distributions indicate non-Gaussian initial-state fluctuations. Bessel–Gaussian and elliptic power fits to the flow distributions are studied to characterize the initial-state spatial anisotropy.

KW - Event-by-event elliptic flow

KW - Non-Gaussian flow fluctuations

KW - Unfolding

UR - https://www.scopus.com/pages/publications/85060298610

U2 - 10.1016/j.physletb.2018.11.063

DO - 10.1016/j.physletb.2018.11.063

M3 - Article

AN - SCOPUS:85060298610

SN - 0370-2693

VL - 789

SP - 643

EP - 665

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics