Centrality dependence of charged hadron transverse momentum spectra in d + Au collisions at S(NN)**1/2 = 200 GeV

We have measured transverse momentum distributions of charged hadrons produced in d+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were obtained for transverse momenta 0.25 < p_T < 6.0 GeV/c, in a pseudorapidity range of 0.2 < eta < 1.4 in the deuteron direction. The evolution of the spectra with collision centrality is presented in comparison to p+pbarcollisions at the same collision energy. With increasing centrality, the yield at high transverse momenta increases more rapidly than the overall particle density, leading to a strong modification of the spectral shape. This change in spectral shape is qualitatively different from observations in Au+Au collisions at the same energy. The results provide important information for discriminating between different models for the suppression of high-p_T hadrons observed in Au+Au collisions.

Note:

5 pages, 4 figures, submitted to PRL

deuteron nucleus: nuclear reaction
scattering: heavy ion
gold
hadron: multiple production
charged particle: yield
transverse momentum dependence
impact parameter: dependence
magnetic spectrometer: PHOBOS
experimental results
Brookhaven RHIC Coll

References(19)

Figures(0)

Production of hadrons with large transverse momentum at 200, 300, and 400 GeV

E100

Collaboration

•

J.W. Cronin
(
- Chicago U., EFI
)

et al.

- Phys.Rev.D 11 (1975) 3105-3123
•
DOI:
- 10.1103/PhysRevD.11.3105

Cronin effect in proton nucleus collisions: A Survey of theoretical models

Alberto Accardi
(
- Heidelberg U.
)

e-Print:
- hep-ph/0212148

Suppression of hadrons with large transverse momentum in central Au+Au collisions at $\sqrt{s_{NN}}$ = 130-GeV

PHENIX

Collaboration

•

K. Adcox
(
- Vanderbilt U.
)

et al.

- Phys.Rev.Lett. 88 (2002) 022301
•
e-Print:
- nucl-ex/0109003
•
DOI:
- 10.1103/PhysRevLett.88.022301

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

Centrality dependence of high $p_{T}$ hadron suppression in Au+Au collisions at $\sqrt{s}_{NN}$ = 130-GeV

STAR

Collaboration

•

C. Adler
(
- Frankfurt U.
)

et al.

- Phys.Rev.Lett. 89 (2002) 202301
•
e-Print:
- nucl-ex/0206011
•
DOI:
- 10.1103/PhysRevLett.89.202301

Charged hadron transverse momentum distributions in au + au collisions at (S(NN))**(1/2) = 200-GeV

PHOBOS

Collaboration

•

B.B. Back

et al.

- Phys.Lett.B 578 (2004) 297-303
•
e-Print:
- nucl-ex/0302015
•
DOI:
- 10.1016/j.physletb.2003.10.101

Jet Quenching in Dense Matter

Miklos Gyulassy
(
- LBL, Berkeley
)
,
Michael Plumer
(
- LBL, Berkeley
)

- Phys.Lett.B 243 (1990) 432-438
•
DOI:
- 10.1016/0370-2693(90)91409-5

Parton saturation and N(part) scaling of semihard processes in QCD

Dmitri Kharzeev
(
- Brookhaven
)
,
Eugene Levin
(
- Tel Aviv U. and
- DESY
)
,
Larry McLerran
(
- Brookhaven
)

- Phys.Lett.B 561 (2003) 93-101
•
e-Print:
- hep-ph/0210332
•
DOI:
- 10.1016/S0370-2693(03)00420-9

Systematic study of high $p_{T}$ hadron spectra in $p p$ , $p$ A and A A collisions from SPS to RHIC energies

Xin-Nian Wang
(
- LBL, Berkeley
)

- Phys.Rev.C 61 (2000) 064910
•
e-Print:
- nucl-th/9812021
•
DOI:
- 10.1103/PhysRevC.61.064910

Absence of suppression in particle production at large transverse momentum in S(NN)**(1/2) = 200-GeV d + Au collisions

PHENIX

Collaboration

•

S.S. Adler
(
- Brookhaven
)

et al.

- Phys.Rev.Lett. 91 (2003) 072303
•
e-Print:
- nucl-ex/0306021
•
DOI:
- 10.1103/PhysRevLett.91.072303

Evidence from d + Au measurements for final state suppression of high p(T) hadrons in Au+Au collisions at RHIC

STAR

Collaboration

•

J. Adams
(
- Birmingham U.
)

et al.

- Phys.Rev.Lett. 91 (2003) 072304
•
e-Print:
- nucl-ex/0306024
•
DOI:
- 10.1103/PhysRevLett.91.072304

The PHOBOS detector at RHIC

PHOBOS

Collaboration

•

B.B Back
(
- Argonne
)

et al.

- Nucl.Instrum.Meth.A 499 (2003) 603-623
•
DOI:
- 10.1016/S0168-9002(02)01959-9

Energy Dependence of the Pseudorapidity Distributions in Proton-Nucleus Collisions Between 50-GeV/c and 200-GeV/c.

et al.

- Phys.Rev.Lett. 39 (1977) 1499-1502
•
DOI:
- 10.1103/PhysRevLett.39.1499

Centrality dependence of the charged particle multiplicity near mid-rapidity in Au + Au collisions at $\sqrt{s}$ (NN) = 130-GeV and 200-GeV

PHOBOS

Collaboration

•

B.B. Back
(
- Argonne
)

et al.

- Phys.Rev.C 65 (2002) 061901
•
e-Print:
- nucl-ex/0201005
•
DOI:
- 10.1103/PhysRevC.65.061901

HIJING 1.0: A Monte Carlo program for parton and particle production in high-energy hadronic and nuclear collisions

Miklos Gyulassy
(
- Columbia U.
)
,
Xin-Nian Wang
(
- LBL, Berkeley
)

- Comput.Phys.Commun. 83 (1994) 307
•
e-Print:
- nucl-th/9502021
•
DOI:
- 10.1016/0010-4655(94)90057-4

Ratios of charged anti-particles to particles near mid-rapidity in Au + Au collisions at s(NN)**(1/2) = 200-GeV

PHOBOS

Collaboration

•

B.B. Back
(
- Argonne
)

et al.

- Phys.Rev.C 67 (2003) 021901
•
e-Print:
- nucl-ex/0206012
•
DOI:
- 10.1103/PhysRevC.67.021901

A Study of the General Characteristics of $p\bar{p}$ Collisions at $\sqrt{s}$ = 0.2-TeV to 0.9-TeV

UA1

Collaboration

•

C. Albajar
(
- CERN
)

et al.

- Nucl.Phys.B 335 (1990) 261-287
•
DOI:
- 10.1016/0550-3213(90)90493-W

High-energy physics event generation with PYTHIA 5.7 and JETSET 7.4

Torbjorn Sjostrand
(
- CERN
)

- Comput.Phys.Commun. 82 (1994) 74-90,
- CERN Geneva - TH. 7111 (93/12,rec.Jan.94) 17 p. and e: CERN th-7111-93
•
DOI:
- 10.1016/0010-4655(94)90132-5

Initial state parton broadening and energy loss probed in d + Au at RHIC

Ivan Vitev
(
- Iowa State U.
)

- Phys.Lett.B 562 (2003) 36-44
•
e-Print:
- nucl-th/0302002
•
DOI:
- 10.1016/S0370-2693(03)00535-5