Multiparticle azimuthal correlations for extracting event-by-event elliptic and triangular flow in Au + Au collisions at sNN=200 GeV

Le résumé fourni par la source

We present measurements of elliptic and triangular azimuthal anisotropy of charged particles detected at forward rapidity $1<|\ensuremath{\eta}|<3$ in Au + Au collisions at $\sqrt{{s}_{{}_{NN}}}=200$ GeV, as a function of centrality. The multiparticle cumulant technique is used to obtain the elliptic flow coefficients ${v}_{2}{2},{v}_{2}{4},{v}_{2}{6}$, and ${v}_{2}{8}$, and triangular flow coefficients ${v}_{3}{2}$ and ${v}_{3}{4}$. Using the small-variance limit, we estimate the mean and variance of the event-by-event ${v}_{2}$ distribution from ${v}_{2}{2}$ and ${v}_{2}{4}$. In a complementary analysis, we also use a folding procedure to study the distributions of ${v}_{2}$ and ${v}_{3}$ directly, extracting both the mean and variance. Implications for initial geometrical fluctuations and their translation into the final-state momentum distributions are discussed.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.