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Energy and system-size dependence of two- and four-particle v2 measurements in heavy-ion collisions at √sNN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow

Publication ,  Journal Article
Agakishiev, G; Aggarwal, MM; Ahammed, Z; Alakhverdyants, AV; Alekseev, I; Alford, J; Anderson, BD; Anson, CD; Arkhipkin, D; Averichev, GS ...
Published in: Physical Review C - Nuclear Physics
July 11, 2012

We present STAR measurements of azimuthal anisotropy by means of the two- and four-particle cumulants v2 (v2{2} and v 2{4}) for Au+Au and Cu+Cu collisions at center-of-mass energies √sNN=62.4 and 200 GeV. The difference between v 2{2}2 and v2{4 }2 is related to v2 fluctuations (σv2) and nonflow (δ2). We present an upper limit to σv 2/v2. Following the assumption that eccentricity fluctuations σ dominate v2 fluctuations σv 2v2≈σ we deduce the nonflow implied for several models of eccentricity fluctuations that would be required for consistency with v2{2} and v2{4}. We also present results on the ratio of v2 to eccentricity. © 2012 American Physical Society.

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Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

July 11, 2012

Volume

86

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

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Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alakhverdyants, A. V., Alekseev, I., Alford, J., … Harris, J. W. (2012). Energy and system-size dependence of two- and four-particle v2 measurements in heavy-ion collisions at √sNN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow. Physical Review C - Nuclear Physics, 86(1). https://doi.org/10.1103/PhysRevC.86.014904
Agakishiev, G., M. M. Aggarwal, Z. Ahammed, A. V. Alakhverdyants, I. Alekseev, J. Alford, B. D. Anderson, et al. “Energy and system-size dependence of two- and four-particle v2 measurements in heavy-ion collisions at √sNN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow.” Physical Review C - Nuclear Physics 86, no. 1 (July 11, 2012). https://doi.org/10.1103/PhysRevC.86.014904.
Agakishiev G, Aggarwal MM, Ahammed Z, Alakhverdyants AV, Alekseev I, Alford J, et al. Energy and system-size dependence of two- and four-particle v2 measurements in heavy-ion collisions at √sNN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow. Physical Review C - Nuclear Physics. 2012 Jul 11;86(1).
Agakishiev, G., et al. “Energy and system-size dependence of two- and four-particle v2 measurements in heavy-ion collisions at √sNN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow.” Physical Review C - Nuclear Physics, vol. 86, no. 1, July 2012. Scopus, doi:10.1103/PhysRevC.86.014904.
Agakishiev G, Aggarwal MM, Ahammed Z, Alakhverdyants AV, Alekseev I, Alford J, Anderson BD, Anson CD, Arkhipkin D, Averichev GS, Balewski J, Beavis DR, Behera NK, Bellwied R, Betancourt MJ, Betts RR, Bhasin A, Bhati AK, Bichsel H, Bielcik J, Bielcikova J, Bland LC, Bordyuzhin IG, Borowski W, Bouchet J, Braidot E, Brandin AV, Bridgeman A, Brovko SG, Bruna E, Bueltmann S, Bunzarov I, Burton TP, Cai XZ, Caines H, Calderón De La Barca Sánchez M, Cebra D, Cendejas R, Cervantes MC, Chaloupka P, Chattopadhyay S, Chen HF, Chen JH, Chen JY, Chen L, Cheng J, Cherney M, Chikanian A, Choi KE, Christie W, Chung P, Codrington MJM, Corliss R, Cramer JG, Crawford HJ, Cui X, Davila Leyva A, De Silva LC, Debbe RR, Dedovich TG, Deng J, Derevschikov AA, Derradi De Souza R, Didenko L, Djawotho P, Dong X, Drachenberg JL, Draper JE, Du CM, Dunlop JC, Efimov LG, Elnimr M, Engelage J, Eppley G, Estienne M, Eun L, Evdokimov O, Fatemi R, Fedorisin J, Fersch RG, Filip P, Finch E, Fine V, Fisyak Y, Gagliardi CA, Gangadharan DR, Geurts F, Ghosh P, Gorbunov YN, Gordon A, Grebenyuk OG, Grosnick D, Gupta A, Gupta S, Guryn W, Haag B, Hajkova O, Hamed A, Han LX, Harris JW. Energy and system-size dependence of two- and four-particle v2 measurements in heavy-ion collisions at √sNN=62.4 and 200 GeV and their implications on flow fluctuations and nonflow. Physical Review C - Nuclear Physics. 2012 Jul 11;86(1).

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

July 11, 2012

Volume

86

Issue

1

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics