INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Measurement of the Jet Size Dependence of Inclusive Jet Suppression 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: 2013 vol. 719 p. 1 - 23
ISSN:
0370-2693
Resumen:
Measurements
of inclusive jet suppression in heavy ion collisions at the LHC provide
direct sensitivity to the physics of jet quenching. In a sample of
lead-lead collisions at s_N_N=2.76 TeV corresponding to an integrated
luminosity of approximately 7 @mb^-^1, ATLAS has measured jets with a
calorimeter system over the pseudorapidity interval |@h|<2.1 and over
the transverse momentum range 38<p_T<210 GeV. Jets were
reconstructed using the anti-k_t algorithm with values for the distance
parameter that determines the nominal jet radius of R=0.2, 0.3, 0.4 and
0.5. The centrality dependence of the jet yield is characterized by the
jet ''central-to-peripheral ratio,'' R_C_P. Jet production is found to
be suppressed by approximately a factor of two in the 10% most central
collisions relative to peripheral collisions. R_C_P varies smoothly with
centrality as characterized by the number of participating nucleons.
The observed suppression is only weakly dependent on jet radius and
transverse momentum. These results provide the first direct measurement
of inclusive jet suppression in heavy ion collisions and complement
previous measurements of dijet transverse energy imbalance at the LHC.Measurements
of inclusive jet suppression in heavy ion collisions at the LHC provide
direct sensitivity to the physics of jet quenching. In a sample of
lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an
integrated luminosity of approximately 7 inverse microbarns, ATLAS has
measured jets with a calorimeter over the pseudorapidity interval |eta|
< 2.1 and over the transverse momentum range 38 < pT < 210 GeV.
Jets were reconstructed using the anti-kt algorithm with values for the
distance parameter that determines the nominal jet radius of R = 0.2,
0.3, 0.4 and 0.5. The centrality dependence of the jet yield is
characterized by the jet "central-to-peripheral ratio," Rcp. Jet
production is found to be suppressed by approximately a factor of two in
the 10% most central collisions relative to peripheral collisions. Rcp
varies smoothly with centrality as characterized by the number of
participating nucleons. The observed suppression is only weakly
dependent on jet radius and transverse momentum. These results provide
the first direct measurement of inclusive jet suppression in heavy ion
collisions and complement previous measurements of dijet transverse
energy imbalance at the LHC.