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Awes, Terry C

Publications and source records attributed to Awes, Terry C.

63 records · Page 4
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DOE OSTI2012

Particle-Yield Modification in Jetlike Azimuthal Dihadron Correlations in Pb-Pb Collisions at s_NN = 2.76 TeV

The yield of charged particles associated with high-p{sub t} trigger particles (8 < p{sub t} < 15 GeV/c) is measured with the ALICE detector in Pb-Pb collisions at {radical}s{sub NN} = 2.76 TeV relative to proton-proton collisions at the same energy. The conditional per-trigger yields are extracted from the narrow jetlike correlation peaks in azimuthal dihadron correlations. In the 5% most central collisions, we observe that the yield of associated charged particles with transverse momenta p{sub t} > 3 GeV/c on the away side drops to about 60% of that observed in pp collisions, while on the near side a moderate enhancement of 20%-30% is found.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
DOE OSTI2012

Small-X Physics in PHENIX

Measurements of particle production at large rapidities allow to probe parton distributions at small-x. Early measurements of d+Au collisions at RHIC have shown that the inclusive yield of hadrons in the forward rapidity (deuteron) direction are suppressed relative to p+p collisions. Theoretical interpretations of these results have attributed the suppression as due to suppression of small-x partons in the Au nucleus due to nuclear shadowing or gluon saturation, as well as due to initial-state parton energy loss. Kinematically constrained measurements of di-hadron pairs for selected combinations of transverse momentum and rapidity can provide restricted selections on the parton momentum fractions allowing to probe the x-dependence of the suppression in greater detail. Two new electromagnetic calorimeters with full azimuthal coverage over the pseudo-rapidity intervals of 3.1 < |$\eta$| < 3.8 have been incorporated into the PHENIX experiment at RHIC. These calorimeters have been utilized to study forward di-hadron correlations in d+Au collisions at $\sqrt{s_{NN}} = 200$, allowing to probe parton momentum fractions down to x ~10^{-3} in the gold nucleus. Recent results from PHENIX on the small-x suppression will be presented.

Awes, Terry C↗