Factorization of two-particle distributions in AMPT simulations of Pb-Pb collisions at √sNN = 5.02 TeV
Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › fagfællebedømt
Standard
Factorization of two-particle distributions in AMPT simulations of Pb-Pb collisions at √sNN = 5.02 TeV. / Bourjau, Christian; Alice Collaboration ; Bearden, Ian; Zhou, You; Pacik, Vojtech; rtc312, rtc312; Ozelin De Lima Pimentel, Lais; Nielsen, Børge Svane; bsm989, bsm989; Gaardhøje, Jens Jørgen; Thoresen, Freja; Bilandzic, Ante; Gajdosova, Katarina; Chojnacki, Marek.
I: Journal of Physics - Conference Series, Bind 1070, 012027, 2018.Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - GEN
T1 - Factorization of two-particle distributions in AMPT simulations of Pb-Pb collisions at √sNN = 5.02 TeV
AU - Bourjau, Christian
AU - Alice Collaboration
AU - Bearden, Ian
AU - Zhou, You
AU - Pacik, Vojtech
AU - rtc312, rtc312
AU - Ozelin De Lima Pimentel, Lais
AU - Nielsen, Børge Svane
AU - bsm989, bsm989
AU - Gaardhøje, Jens Jørgen
AU - Thoresen, Freja
AU - Bilandzic, Ante
AU - Gajdosova, Katarina
AU - Chojnacki, Marek
PY - 2018
Y1 - 2018
N2 - The flow ansatz states that the single-particle distribution of a given event can be described in terms of the complex flow coefficients Vn . Multi-particle distributions can therefore be expressed as products of these single-particle coefficients; a property commonly referred to as factorization. The amplitudes and phases of the coefficients fluctuate from event to event, possibly breaking the factorization assumption for event-sample averaged multi-particle distributions. Furthermore, non-flow effects such as di-jets may also break the factorization assumption. The factorization breaking with respect to pseudorapidity η provides insights into the fluctuations of the initial conditions of heavy ion collisions and can simultaneously be used to identify regions of the phase space which exhibit non-flow effects. These proceedings present a method to perform a factorization of the two-particle Fourier coefficients V nΔ(ηa , ηb ) which is largely independent of detector effects. AMPT model calculations of Pb-Pb collisions at √sNN = 5.02 TeV are used to identify the smallest |Δη|-gap necessary for the factorization assumption to hold. Furthermore, a possible Δη-dependent decorrelation effect in the simulated data is quantified using the empirical parameter . The decorrelation effect observed in the AMPT calculations is compared to results by the CMS collaboration for Pb-Pb collisions at √sNN = 2.76 TeV.
AB - The flow ansatz states that the single-particle distribution of a given event can be described in terms of the complex flow coefficients Vn . Multi-particle distributions can therefore be expressed as products of these single-particle coefficients; a property commonly referred to as factorization. The amplitudes and phases of the coefficients fluctuate from event to event, possibly breaking the factorization assumption for event-sample averaged multi-particle distributions. Furthermore, non-flow effects such as di-jets may also break the factorization assumption. The factorization breaking with respect to pseudorapidity η provides insights into the fluctuations of the initial conditions of heavy ion collisions and can simultaneously be used to identify regions of the phase space which exhibit non-flow effects. These proceedings present a method to perform a factorization of the two-particle Fourier coefficients V nΔ(ηa , ηb ) which is largely independent of detector effects. AMPT model calculations of Pb-Pb collisions at √sNN = 5.02 TeV are used to identify the smallest |Δη|-gap necessary for the factorization assumption to hold. Furthermore, a possible Δη-dependent decorrelation effect in the simulated data is quantified using the empirical parameter . The decorrelation effect observed in the AMPT calculations is compared to results by the CMS collaboration for Pb-Pb collisions at √sNN = 2.76 TeV.
U2 - 10.1088/1742-6596/1070/1/012027
DO - 10.1088/1742-6596/1070/1/012027
M3 - Conference article
AN - SCOPUS:85054498578
VL - 1070
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012027
T2 - 34th Winter Workshop on Nuclear Dynamics 2018
Y2 - 25 March 2018 through 31 March 2018
ER -
ID: 221751449