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

STAR Collaboration

Research output: Contribution to journalArticle

114 Citations (Scopus)

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.

Original languageEnglish
Article number092301
JournalPhysical Review Letters
Volume92
Issue number9
DOIs
StatePublished - Mar 5 2004

Fingerprint

Mesons
Heavy Ions
collisions
mass distribution
transverse momentum
ionic collisions
mesons
shift
interactions

All Science Journal Classification (ASJC) codes

  • Medicine(all)
  • Physics and Astronomy(all)

Cite this

ρ0Production and possible modification in Au + Au and p + p collisions at √SNN= 200 GeV. / STAR Collaboration.

In: Physical Review Letters, Vol. 92, No. 9, 092301, 05.03.2004.

Research output: Contribution to journalArticle

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

AU - STAR Collaboration

AU - Adams, J.

AU - Adler, C.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Amonett, J.

AU - Anderson, B. D.

AU - Arkhipkin, D.

AU - Averichev, G. S.

AU - Badyal, S. K.

AU - Balewski, J.

AU - Barannikova, O.

AU - Barnby, L. S.

AU - Baudot, J.

AU - Bekele, S.

AU - Belaga, V. V.

AU - Bellwied, R.

AU - Berger, J.

AU - Bezverkhny, B. I.

AU - Bhardwaj, S.

AU - Bhati, A. K.

AU - Bichsel, H.

AU - Billmeier, A.

AU - Bland, L. C.

AU - Blyth, C. O.

AU - Bonner, B. E.

AU - Botje, M.

AU - Boucham, A.

AU - Brandin, A.

AU - Bravar, A.

AU - Cadman, R. V.

AU - Cai, X. Z.

AU - Caines, H.

AU - Calderón De La Barca Sánchez, M.

AU - Carroll, J.

AU - Castillo, J.

AU - Cebra, D.

AU - Chaloupka, P.

AU - Chattopadhyay, S.

AU - Chen, H. F.

AU - Chen, Y.

AU - Chernenko, S. P.

AU - Cherney, Michael G.

AU - Chikanian, A.

AU - Christie, W.

AU - Coffin, J. P.

AU - Cormier, T. M.

AU - Cramer, J. G.

AU - Crawford, H. J.

AU - Das, D.

AU - Seger, Janet E.

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.

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U2 - 10.1103/PhysRevLett.92.092301

DO - 10.1103/PhysRevLett.92.092301

M3 - Article

VL - 92

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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M1 - 092301

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