INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of the pseudorapidity and transverse momentum dependence of the elliptic flow of charged particles in lead-lead collisions at √sNN = 2.76 TeV with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICS LETTERS B
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2012 vol. 231 p. 1 - 23
ISSN:
0370-2693
Resumen:
This paper describes the measurement of elliptic flow of charged
particles in lead-lead collisions at sqrt(s_NN) = 2.76 TeV using the
ATLAS detector at the Large Hadron Collider (LHC). The results are based
on an integrated luminosity of approximately 7 ub^-1. Elliptic flow is
measured over a wide region in pseudorapidity, |eta| < 2.5, and over a
broad range in transverse momentum, 0.5 < p_T < 20 GeV. The
elliptic flow parameter v_2 is obtained by correlating individual tracks
with the event plane measured using energy deposited in the forward
calorimeters. As a function of transverse momentum, v_2(p_T) reaches a
maximum at p_T of about 3 GeV, then decreases and becomes weakly
dependent on p_T above 7 - 8 GeV. Over the measured pseudorapidity
region, v_2 is found to be approximately independent of |eta| for all
collision centralities and particle transverse momenta, something not
observed in lower energy collisions. The results are discussed in the
context of previous measurements at lower collision energies, as well as
recent results from the LHC.