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Pseudorapidity Asymmetry and Centrality Dependence of Charged Hadron Spectra in d+Au collisions at sqrt(sNN) = 200 GeV

Journal Article ·
OSTI ID:842270
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The pseudorapidity asymmetry and centrality dependence of charged hadron spectra in d+Au collisions at {radical}s{sub NN} = 200 GeV are presented. The charged particle density at mid-rapidity, its pseudorapidity asymmetry and centrality dependence are reasonably reproduced by a Multi-Phase Transport model, by HIJING, and by the latest calculations in a saturation model. Ratios of transverse momentum spectra between backward and forward pseudorapidity are above unity for p{sub T} below 5 GeV/c. The ratio of central to peripheral spectra in d+Au collisions shows enhancement at 2 < p{sub T} < 6 GeV/c, with a larger effect at backward rapidity than forward rapidity. Our measurements are in qualitative agreement with gluon saturation and in contrast to calculations based on incoherent multiple partonic scatterings.
Research Organization:
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Organization:
USDOE Director. Office of Science. Office of Nuclear Physics; US National Science Foundation; BMBF Germany, IN2P3 and RA and RPL and EMN France, EPSRC United Kingdom, FAPESP Brazil, Russian Ministry of Science and Technology, Ministry of Education and NNSFC China, Grant Agency Czech Republic, FOM and UU The Netherlands, DAE and DST and CSIR India, Swiss National Science Foundation, Polish State Committee for Scientific Research
DOE Contract Number:
AC03-76SF00098
OSTI ID:
842270
Report Number(s):
LBNL--56883
Country of Publication:
United States
Language:
English

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
CHARGED PARTICLES
GLUONS
HADRONS
PARTICLE RAPIDITY
SATURATION
SPECTRA
TRANSPORT
TRANSVERSE MOMENTUM