ρ0Production and possible modification in Au + Au and p + p collisions at √SNN= 200 GeV

STAR Collaboration

doi:10.1103/PhysRevLett.92.092301

ρ⁰Production and possible modification in Au + Au and p + p collisions at √S_NN= 200 GeV

STAR Collaboration

University of Birmingham
Goethe University Frankfurt
Panjab University
Variable Energy Cyclotron Centre
Yale University
Brookhaven National Laboratory
Kent State University
Joint Institute for Nuclear Research
University of Jammu
Indiana University Bloomington
Purdue University
Institut de Recherches Subatomiques
Ohio State University
Wayne State University
University of Rajasthan
University of Washington
Rice University
National Institute for Subatomic Physics
SUBATECH
Moscow Engineering Physics Institute
Argonne National Laboratory
Academia Sinica - Shanghai Institute of Nuclear Research
Lawrence Berkeley National Laboratory
University of California at Davis
Czech Academy of Sciences
University of Science and Technology of China
University of California at Los Angeles
Creighton University
University of California at Berkeley
Institute for High Energy Physics
Institute of Physics
Max Planck Institute for Physics (Werner Heisenberg Institute)
Central China Normal University
Texas A&M University
Valparaiso University
Pennsylvania State University
University of Texas at Austin
California Institute of Technology
Warsaw University of Technology
Carnegie Mellon University
City University of New York
Universidade de São Paulo
University of Zagreb
Michigan State University
Indian Institute of Technology Bombay

Research output: Contribution to journal › Article › peer-review

149 Scopus citations

Abstract

We report results on ρ(770)⁰ → π⁺ π^- production at midrapidity in p + p and peripheral Au + Au collisions at ps_NN = 200 GeV. This is the first direct measurement of ρ(770)⁰ → π⁺ π^- in heavy-ion collisions. The measured ρ⁰ peak in the invariant mass distribution is shifted by ∼40 MeV=c² in minimum bias p + p interactions and ∼70 MeV=c² in peripheral Au + Au collisions. The ρ⁰ mass shift is dependent on transverse momentum and multiplicity. The modification of the ρ⁰ meson mass, width, and shape due to phase space and dynamical effects are discussed.

Original language	English
Article number	092301
Pages (from-to)	092301-1-092301-6
Journal	Physical Review Letters
Volume	92
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevLett.92.092301
State	Published - 5 Mar 2004
Externally published	Yes

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10.1103/PhysRevLett.92.092301

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@article{7264b90014014bdcb1441e82b6d6c285,

title = "ρ0Production and possible modification in Au + Au and p + p collisions at √SNN= 200 GeV",

abstract = "We report results on ρ(770)0 → π+ π- production at midrapidity in p + p and peripheral Au + Au collisions at psNN = 200 GeV. This is the first direct measurement of ρ(770)0 → π+ π- in heavy-ion collisions. The measured ρ0 peak in the invariant mass distribution is shifted by ∼40 MeV=c2 in minimum bias p + p interactions and ∼70 MeV=c2 in peripheral Au + Au collisions. The ρ0 mass shift is dependent on transverse momentum and multiplicity. The modification of the ρ0 meson mass, width, and shape due to phase space and dynamical effects are discussed.",

author = "J. Adams and C. Adler and Aggarwal, \{M. M.\} and Z. Ahammed and S. Kabana and \{STAR Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2004 The American Physical Society.",

year = "2004",

month = mar,

day = "5",

doi = "10.1103/PhysRevLett.92.092301",

language = "English",

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T1 - ρ0Production and possible modification in Au + Au and p + p collisions at √SNN= 200 GeV

AU - Adams, J.

AU - Adler, C.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Kabana, S.

AU - STAR Collaboration

PY - 2004/3/5

Y1 - 2004/3/5

N2 - We report results on ρ(770)0 → π+ π- production at midrapidity in p + p and peripheral Au + Au collisions at psNN = 200 GeV. This is the first direct measurement of ρ(770)0 → π+ π- in heavy-ion collisions. The measured ρ0 peak in the invariant mass distribution is shifted by ∼40 MeV=c2 in minimum bias p + p interactions and ∼70 MeV=c2 in peripheral Au + Au collisions. The ρ0 mass shift is dependent on transverse momentum and multiplicity. The modification of the ρ0 meson mass, width, and shape due to phase space and dynamical effects are discussed.

AB - We report results on ρ(770)0 → π+ π- production at midrapidity in p + p and peripheral Au + Au collisions at psNN = 200 GeV. This is the first direct measurement of ρ(770)0 → π+ π- in heavy-ion collisions. The measured ρ0 peak in the invariant mass distribution is shifted by ∼40 MeV=c2 in minimum bias p + p interactions and ∼70 MeV=c2 in peripheral Au + Au collisions. The ρ0 mass shift is dependent on transverse momentum and multiplicity. The modification of the ρ0 meson mass, width, and shape due to phase space and dynamical effects are discussed.

UR - https://www.scopus.com/pages/publications/84884347678

U2 - 10.1103/PhysRevLett.92.092301

DO - 10.1103/PhysRevLett.92.092301

M3 - Article

AN - SCOPUS:84884347678

SN - 0031-9007

VL - 92

SP - 092301-1-092301-6

JO - Physical Review Letters

JF - Physical Review Letters

IS - 9

M1 - 092301

ER -

ρ⁰Production and possible modification in Au + Au and p + p collisions at √S_NN= 200 GeV

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