173 research outputs found
Direct photon measurement in Au+Au collisions at =200GeV a t RHIC
Direct photon production in Au+Au collisions at =200 GeV has
been measured. The result is compared to several theoretical calculations, and
found that it is not inconsistent with ones including thermal radiation from
QGP or jet-photon conversion process on top of a NLO pQCD expectation. The
direct photon contribution in dilepton measurement is also evaluated.Comment: 3 pages, 2 figures. Contributed talk at PANIC '05 conference, Santa
Fe, NM, Oct24-28, 200
System size and energy dependence of high pT hadron production measured with PHENIX experiment at RHIC
PHENIX has measured high transverse momentum (pT) identified hadrons in
different collision species and energies in the last five RHIC runs. The
systematic study of the high pT hadron production provides an idea on
interaction of hard scattered partons and the matter created in relativistic
heavy ion collision. The eta/pi0 ratio is measured in Au+Au collisions, which
gives a hint on the system thermalization and particle production. A future
measurement of hadron and photon measurement is discussed.Comment: 6 pages, 9 figures, Contributions for Quark Matter 2006 poster
ssessio
Photon production in =200 GeV Au+Au collisions measured by the PHENIX experiment at RHIC
Direct photon production in Au+Au collisions at =200 GeV has
been measured in the range of 15 GeV/. The yield as
acfunction of centrality is in agreement with published data of the RHIC 2002
run, and with results from a new method that explores very low mass dileptons.
The result is compared to several theoretical calculations, and it is found
that the measurement is not inconsistent with calculations including thermal
photon contributions.Comment: 6 pages, 7 figures. Poster proceedings for Quark Matter Conference
2005, held in Budapest, Hungary, Aug 4-9, 2005. To be appeared in Acta
Physica Hungarica, Nuclear Science, Heavy Ion Physics A. Revised along
Referee's comment
Profiling hot and dense nuclear medium with high transverse momentum hadrons produced in d+Au and Au+Au collisions by the PHENIX experiment at RHIC
PHENIX measurements of high transverse momentum () identified hadrons in
+Au and Au+Au collisions are presented. The nuclear modification factors
( and ) for and are found to be very
consistent in both collision systems, respectively. Using large amount of
and Au+Au datasets, the fractional momentum loss () and the
path-length dependent yield of in Au+Au collisions are obtained. The
hadron spectra in the most central +Au and the most peripheral Au+Au
collisions are studied. The spectra shapes are found to be similar in both
systems, but the yield is suppressed in the most peripheral Au+Au collisions.Comment: 4 pages, 5 figures, talk presented at the International Nuclear
Physics Conference 2013, held in Florence, Italy, on June 2 - 7, 201
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