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

CMS Collaboration

doi:10.1016/j.physletb.2018.11.063

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

CMS Collaboration

Research output: Contribution to journal › Article › Research › peer-review

45 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	643-665
Number of pages	23
Journal	Physics Letters B
Volume	789
DOIs	https://doi.org/10.1016/j.physletb.2018.11.063
Publication status	Published - 10 Feb 2019
Externally published	Yes

Keywords

Event-by-event elliptic flow
Non-Gaussian flow fluctuations
Unfolding

Access to Document

10.1016/j.physletb.2018.11.063

272365966-OAFinal published version, 942 KBLicence: CC BY

Cite this

@article{6142f9ee8e3647f689a9cf21195ceca6,

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 {De Wolf}, {E. A.} and {Di Croce}, D. and X. Janssen and J. Lauwers and {Van De Klundert}, M. and {Van Haevermaet}, H. and {Van Mechelen}, P. and {Van Remortel}, N. 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 Q. Python and K. Skovpen and S. Tavernier and {Van Doninck}, W. and {Van Mulders}, P. and {Van Parijs}, I. and D. Beghin and H. Brun and B. Clerbaux and {De Lentdecker}, G. and H. Delannoy and B. Dorney and G. Fasanella and L. Favart and R. Goldouzian and A. Grebenyuk and T. Lenzi and J. Luetic and T. Maerschalk and A. Marinov and T. Seva and E. Starling and {Vander Velde}, C. and P. Vanlaer and D. Vannerom and R. Yonamine and F. Zenoni and F. Zhang and A. Cimmino and T. Cornelis and D. Dobur and A. Fagot and M. Gul and I. Khvastunov and D. Poyraz and C. Roskas and S. Salva and M. Tytgat and W. Verbeke and N. Zaganidis and H. Bakhshiansohi and O. Bondu and S. Brochet and G. Bruno and C. Caputo and A. Caudron and P. David and {De Visscher}, S. and C. Delaere and M. Delcourt and B. Francois and A. Giammanco and M. Komm and G. Krintiras and V. Lemaitre and A. Magitteri and A. Mertens and M. Musich and K. Piotrzkowski and L. Quertenmont and A. Saggio and {Vidal Marono}, M. and S. Wertz and J. Zobec and {Ald{\'a} J{\'u}nior}, {W. L.} and Alves, {F. L.} and Alves, {G. A.} and L. Brito and {Correa Martins Junior}, M. and C. Hensel and A. Moraes and Pol, {M. E.} and {Rebello Teles}, P. and {Belchior Batista Das Chagas}, E. and W. Carvalho and J. Chinellato and E. Coelho and {Da Costa}, {E. M.} and {Da Silveira}, {G. G.} and {De Jesus Damiao}, D. and {Fonseca De Souza}, S. and {Huertas Guativa}, {L. M.} and H. Malbouisson and {Melo De Almeida}, M. and {Mora Herrera}, C. and L. Mundim and H. Nogima and {Sanchez Rosas}, {L. J.} and A. Santoro and A. Sznajder and M. Thiel and {Tonelli Manganote}, {E. J.} and {Torres Da Silva De Araujo}, F. and {Vilela Pereira}, A. and S. Ahuja and Bernardes, {C. A.} and {Fernandez Perez Tomei}, {T. R.} and Gregores, {E. M.} and Mercadante, {P. G.} and Novaes, {S. F.} and Padula, {Sandra S.} and {Romero Abad}, D. and {Ruiz Vargas}, {J. C.} and A. Aleksandrov and R. Hadjiiska and P. Iaydjiev and M. Misheva and M. Rodozov and M. Shopova and G. Sultanov and A. Dimitrov and L. Litov and B. Pavlov and P. Petkov and W. Fang and X. Gao and L. Yuan and M. Ahmad and Bian, {J. G.} and Chen, {G. M.} and Chen, {H. S.} and M. Chen and Y. Chen and Jiang, {C. H.} and D. Leggat and H. Liao and Z. Liu and F. Romeo and Shaheen, {S. M.} and A. Spiezia and J. Tao and C. Wang and Z. Wang and E. Yazgan and H. Zhang and S. Zhang and J. Zhao and Y. Ban and G. Chen and J. Li and Q. Li and S. Liu and Y. Mao and Qian, {S. J.} and D. Wang and Z. Xu and C. Avila and A. Cabrera and {Chaparro Sierra}, {L. F.} and C. Florez and {Gonz{\'a}lez Hern{\'a}ndez}, {C. F.} and {Ruiz Alvarez}, {J. D.} and {Segura Delgado}, {M. A.} and B. Courbon and N. Godinovic and D. Lelas and I. Puljak and {Ribeiro Cipriano}, {P. M.} and T. Sculac and Z. Antunovic and M. Kovac and V. Brigljevic and D. Ferencek and K. Kadija and B. Mesic and A. Starodumov and T. Susa and Ather, {M. W.} and A. Attikis and G. Mavromanolakis and J. Mousa and C. Nicolaou and F. Ptochos and Razis, {P. A.} and H. Rykaczewski and M. Finger and {Carrera Jarrin}, E. and Abdelalim, {A. A.} and Y. Mohammed and E. Salama and Dewanjee, {R. K.} and M. Kadastik and L. Perrini and M. Raidal and A. Tiko and C. Veelken and P. Eerola and H. Kirschenmann and J. Pekkanen and M. Voutilainen and J. Havukainen and Heikkil{\"a}, {J. K.} and J. Nash and {CMS Collaboration}",

year = "2019",

month = feb,

day = "10",

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

language = "English",

volume = "789",

pages = "643--665",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier BV",

}

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 - De Wolf, E. A.

AU - Di Croce, D.

AU - Janssen, X.

AU - Lauwers, J.

AU - Van De Klundert, M.

AU - Van Haevermaet, H.

AU - Van Mechelen, P.

AU - Van Remortel, N.

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 - Python, Q.

AU - Skovpen, K.

AU - Tavernier, S.

AU - Van Doninck, W.

AU - Van Mulders, P.

AU - Van Parijs, I.

AU - Beghin, D.

AU - Brun, H.

AU - Clerbaux, B.

AU - De Lentdecker, G.

AU - Delannoy, H.

AU - Dorney, B.

AU - Fasanella, G.

AU - Favart, L.

AU - Goldouzian, R.

AU - Grebenyuk, A.

AU - Lenzi, T.

AU - Luetic, J.

AU - Maerschalk, T.

AU - Marinov, A.

AU - Seva, T.

AU - Starling, E.

AU - Vander Velde, C.

AU - Vanlaer, P.

AU - Vannerom, D.

AU - Yonamine, R.

AU - Zenoni, F.

AU - Zhang, F.

AU - Cimmino, A.

AU - Cornelis, T.

AU - Dobur, D.

AU - Fagot, A.

AU - Gul, M.

AU - Khvastunov, I.

AU - Poyraz, D.

AU - Roskas, C.

AU - Salva, S.

AU - Tytgat, M.

AU - Verbeke, W.

AU - Zaganidis, N.

AU - Bakhshiansohi, H.

AU - Bondu, O.

AU - Brochet, S.

AU - Bruno, G.

AU - Caputo, C.

AU - Caudron, A.

AU - David, P.

AU - De Visscher, S.

AU - Delaere, C.

AU - Delcourt, M.

AU - Francois, B.

AU - Giammanco, A.

AU - Komm, M.

AU - Krintiras, G.

AU - Lemaitre, V.

AU - Magitteri, A.

AU - Mertens, A.

AU - Musich, M.

AU - Piotrzkowski, K.

AU - Quertenmont, L.

AU - Saggio, A.

AU - Vidal Marono, M.

AU - Wertz, S.

AU - Zobec, J.

AU - Aldá Júnior, W. L.

AU - Alves, F. L.

AU - Alves, G. A.

AU - Brito, L.

AU - Correa Martins Junior, M.

AU - Hensel, C.

AU - Moraes, A.

AU - Pol, M. E.

AU - Rebello Teles, P.

AU - Belchior Batista Das Chagas, E.

AU - Carvalho, W.

AU - Chinellato, J.

AU - Coelho, E.

AU - Da Costa, E. M.

AU - Da Silveira, G. G.

AU - De Jesus Damiao, D.

AU - Fonseca De Souza, S.

AU - Huertas Guativa, L. M.

AU - Malbouisson, H.

AU - Melo De Almeida, M.

AU - Mora Herrera, C.

AU - Mundim, L.

AU - Nogima, H.

AU - Sanchez Rosas, L. J.

AU - Santoro, A.

AU - Sznajder, A.

AU - Thiel, M.

AU - Tonelli Manganote, E. J.

AU - Torres Da Silva De Araujo, F.

AU - Vilela Pereira, A.

AU - Ahuja, S.

AU - Bernardes, C. A.

AU - Fernandez Perez Tomei, T. R.

AU - Gregores, E. M.

AU - Mercadante, P. G.

AU - Novaes, S. F.

AU - Padula, Sandra S.

AU - Romero Abad, D.

AU - Ruiz Vargas, J. C.

AU - Aleksandrov, A.

AU - Hadjiiska, R.

AU - Iaydjiev, P.

AU - Misheva, M.

AU - Rodozov, M.

AU - Shopova, M.

AU - Sultanov, G.

AU - Dimitrov, A.

AU - Litov, L.

AU - Pavlov, B.

AU - Petkov, P.

AU - Fang, W.

AU - Gao, X.

AU - Yuan, L.

AU - Ahmad, M.

AU - Bian, J. G.

AU - Chen, G. M.

AU - Chen, H. S.

AU - Chen, M.

AU - Chen, Y.

AU - Jiang, C. H.

AU - Leggat, D.

AU - Liao, H.

AU - Liu, Z.

AU - Romeo, F.

AU - Shaheen, S. M.

AU - Spiezia, A.

AU - Tao, J.

AU - Wang, C.

AU - Wang, Z.

AU - Yazgan, E.

AU - Zhang, H.

AU - Zhang, S.

AU - Zhao, J.

AU - Ban, Y.

AU - Chen, G.

AU - Li, J.

AU - Li, Q.

AU - Liu, S.

AU - Mao, Y.

AU - Qian, S. J.

AU - Wang, D.

AU - Xu, Z.

AU - Avila, C.

AU - Cabrera, A.

AU - Chaparro Sierra, L. F.

AU - Florez, C.

AU - González Hernández, C. F.

AU - Ruiz Alvarez, J. D.

AU - Segura Delgado, M. A.

AU - Courbon, B.

AU - Godinovic, N.

AU - Lelas, D.

AU - Puljak, I.

AU - Ribeiro Cipriano, P. M.

AU - Sculac, T.

AU - Antunovic, Z.

AU - Kovac, M.

AU - Brigljevic, V.

AU - Ferencek, D.

AU - Kadija, K.

AU - Mesic, B.

AU - Starodumov, A.

AU - Susa, T.

AU - Ather, M. W.

AU - Attikis, A.

AU - Mavromanolakis, G.

AU - Mousa, J.

AU - Nicolaou, C.

AU - Ptochos, F.

AU - Razis, P. A.

AU - Rykaczewski, H.

AU - Finger, M.

AU - Carrera Jarrin, E.

AU - Abdelalim, A. A.

AU - Mohammed, Y.

AU - Salama, E.

AU - Dewanjee, R. K.

AU - Kadastik, M.

AU - Perrini, L.

AU - Raidal, M.

AU - Tiko, A.

AU - Veelken, C.

AU - Eerola, P.

AU - Kirschenmann, H.

AU - Pekkanen, J.

AU - Voutilainen, M.

AU - Havukainen, J.

AU - Heikkilä, J. K.

AU - Nash, J.

AU - CMS Collaboration

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 - http://www.scopus.com/inward/record.url?scp=85060298610&partnerID=8YFLogxK

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 B

JF - Physics Letters B

ER -