Pion, kaon, proton and anti-proton transverse momentum distributions from $p + p$ and $d +$ Au collisions at $\sqrt{s_{NN}} = 200$GeV

from 200 GeV p+p and d+Au collisions are reported. A time-of-flight detector based on multi-gap resistive plate chamber technology is used for particle identification. The particle-species dependence of the Cronin effect is observed to be significantly smaller than that at lower energies. The ratio of the nuclear modification factor (

R_{dAu}

) between protons

(p+\bar{p})

and charged hadrons (

h

) in the transverse momentum range

1.2<{p_{T}}<3.0

GeV/c is measured to be

1.19\pm0.05

(stat)

\pm0.03

(syst) in minimum-bias collisions and shows little centrality dependence. The yield ratio of

(p+\bar{p})/h

in minimum-bias d+Au collisions is found to be a factor of 2 lower than that in Au+Au collisions, indicating that the Cronin effect alone is not enough to account for the relative baryon enhancement observed in heavy ion collisions at RHIC.

Note:

6 pages, 4 figures, 1 table. We extended the pion spectra from transverse momentum 1.8 GeV/c to 3. GeV/c Journal-ref: Phys.Lett. B616 (2005) 8-16

13.85.Ni
25.75.Dw
25.75.-q
p p: inclusive reaction
deuteron nucleus: inclusive reaction
gold
charged particle: multiple production
pi: hadroproduction
K: hadroproduction
p: hadroproduction

References(41)

Figures(5)

Transverse momentum and collision energy dependence of high p(T) hadron suppression in Au+Au collisions at ultrarelativistic energies

STAR

Collaboration

•

J. Adams
(
- Birmingham U.
)

et al.

- Phys.Rev.Lett. 91 (2003) 172302
•
e-Print:
- nucl-ex/0305015
•
DOI:
- 10.1103/PhysRevLett.91.172302

Suppressed $\pi^0$ production at large transverse momentum in central Au+ Au collisions at $\sqrt{S_{NN}}$ = 200 GeV

PHENIX

Collaboration

•

S.S. Adler
(
- Brookhaven
)

et al.

- Phys.Rev.Lett. 91 (2003) 072301
•
e-Print:
- nucl-ex/0304022
•
DOI:
- 10.1103/PhysRevLett.91.072301

Mid-rapidity neutral pion production in proton proton collisions at $\sqrt{s}$ = 200-GeV

PHENIX

Collaboration

•

S.S. Adler
(
- Brookhaven
)

et al.

- Phys.Rev.Lett. 91 (2003) 241803
•
e-Print:
- hep-ex/0304038
•
DOI:
- 10.1103/PhysRevLett.91.241803

Jet quenching and radiative energy loss in dense nuclear matter

Particle type dependence of azimuthal anisotropy and nuclear modification of particle production in Au + Au collisions at s(NN)**(1/2) = 200-GeV

STAR

Collaboration

•

John Adams
(
- UC, Davis
)

et al.

- Phys.Rev.Lett. 92 (2004) 052302
•
e-Print:
- nucl-ex/0306007
•
DOI:
- 10.1103/PhysRevLett.92.052302

Centrality dependence of the high p(T) charged hadron suppression in Au+Au collisions at s(NN)**(1/2) = 130-GeV

PHENIX

Collaboration

•

K. Adcox

et al.

- Phys.Lett.B 561 (2003) 82-92
•
e-Print:
- nucl-ex/0207009
•
DOI:
- 10.1016/S0370-2693(03)00423-4

Scaling properties of proton and anti-proton production in s(NN)**(1/2) 200-GeV Au+Au collisions

PHENIX

Collaboration

•

S.S. Adler
(
- Brookhaven
)

et al.

- Phys.Rev.Lett. 91 (2003) 172301
•
e-Print:
- nucl-ex/0305036
•
DOI:
- 10.1103/PhysRevLett.91.172301

A Hydrodynamic Description of Heavy Ion Collisions at the SPS and RHIC

D. Teaney
(
- SUNY, Stony Brook and
- Brookhaven
)
,
J. Lauret
(
- Brookhaven
)
,
E.V. Shuryak
(
- SUNY, Stony Brook
)

e-Print:
- nucl-th/0110037

Flow at the SPS and RHIC as a quark gluon plasma signature

D. Teaney
(
- SUNY, Stony Brook
)
,
J. Lauret
(
- SUNY, Stony Brook
)
,
Edward V. Shuryak
(
- SUNY, Stony Brook
)

- Phys.Rev.Lett. 86 (2001) 4783-4786
•
e-Print:
- nucl-th/0011058
•
DOI:
- 10.1103/PhysRevLett.86.4783

Results of the hydrodynamics approach to heavy ion collisions

Pasi Huovinen
(
- Minnesota U.
)

- Nucl.Phys.A 715 (2003) 299-308
•
e-Print:
- nucl-th/0210024
•
DOI:
- 10.1016/S0375-9474(02)01439-2

Scaling behavior at high p(T) and the p / pi ratio

Rudolph C. Hwa
(
- Oregon U.
)
,
C.B. Yang
(
- Oregon U. and
- Hua-Zhong Normal U.
)

- Phys.Rev.C 67 (2003) 034902
•
e-Print:
- nucl-th/0211010
•
DOI:
- 10.1103/PhysRevC.67.034902

Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase

- Phys.Rev.C 68 (2003) 044902
•
e-Print:
- nucl-th/0306027
•
DOI:
- 10.1103/PhysRevC.68.044902

Parton coalescence and anti-proton / pion anomaly at RHIC

V. Greco
(
- Texas A-M
)
,
C.M. Ko
(
- Texas A-M
)
,
P. Levai
(
- Texas A-M and
- Budapest, RMKI
)

- Phys.Rev.Lett. 90 (2003) 202302
•
e-Print:
- nucl-th/0301093
•
DOI:
- 10.1103/PhysRevLett.90.202302

Jet quenching and the anti-p greater than or equal to pi- anomaly at RHIC

Ivan Vitev
(
- Columbia U.
)
,
Miklos Gyulassy
(
- Columbia U. and
- Collegium Budapest
)

- Phys.Rev.C 65 (2002) 041902
•
e-Print:
- nucl-th/0104066
•
DOI:
- 10.1103/PhysRevC.65.041902

Production of Hadrons with Large Transverse Momentum at 200-GeV and 300-GeV.

et al.

- Phys.Rev.Lett. 31 (1973) 1426-1429,
- PHYS. REV. LETTERS 31 (1973) 1426-1429 AND PRINCETON UNIV - COO-3072-22 (REC.NOV 73) 12 P
•
DOI:
- 10.1103/PhysRevLett.31.1426