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

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

141 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 - Mar 5 2004
Externally published	Yes

Funding

We thank M. Bleicher, P. Braun-Munzinger, W. Broniowski, G. E. Brown, W. Florkowski, P. Kolb, G. D. Lafferty, S. Pratt, R. Rapp, and E. Shuryak for valuable discussions. We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center at LBNL for their support. This work was supported in part by the HENP Divisions of the Office of Science of the U.S. DOE; the U.S. NSF; the BMBF of Germany; IN2P3, RA, RPL, and EMN of France; EPSRC of the United Kingdom; FAPESP of Brazil; the Russian Ministry of Science and Technology; the Ministry of Education and the NNSFC of China; SFOM of the Czech Republic, FOM and UU of The Netherlands, DAE, DST, and CSIR of the Government of India; and the Swiss NSF.

Funders	Funder number
EMN
Russian Ministry of Science and Technology
U.S. Department of Energy
Office of Science
Engineering and Physical Sciences Research Council
Department of Science and Technology, Ministry of Science and Technology, India
Council of Scientific and Industrial Research, India
Department of Atomic Energy, Government of India
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Stichting voor Fundamenteel Onderzoek der Materie
Fundação de Amparo à Pesquisa do Estado de São Paulo
National Natural Science Foundation of China
Bundesministerium für Bildung und Forschung	IN2P3
Bundesministerium für Bildung und Forschung
Ministry of Education
Neurosciences Foundation

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10.1103/PhysRevLett.92.092301

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@article{c337407b5d1e4545a103450b04929d29,

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 = "{STAR Collaboration} and J. Adams and C. Adler and Aggarwal, {M. M.} and Z. Ahammed and J. Amonett and Anderson, {B. D.} and D. Arkhipkin and Averichev, {G. S.} and Badyal, {S. K.} and J. Balewski and O. Barannikova and Barnby, {L. S.} and J. Baudot and S. Bekele and Belaga, {V. V.} and R. Bellwied and J. Berger and Bezverkhny, {B. I.} and S. Bhardwaj and Bhati, {A. K.} and H. Bichsel and A. Billmeier and Bland, {L. C.} and Blyth, {C. O.} and Bonner, {B. E.} and M. Botje and A. Boucham and A. Brandin and A. Bravar and Cadman, {R. V.} and Cai, {X. Z.} and H. Caines and {Calder{\'o}n De La Barca S{\'a}nchez}, M. and J. Carroll and J. Castillo and D. Cebra and P. Chaloupka and S. Chattopadhyay and Chen, {H. F.} and Y. Chen and Chernenko, {S. P.} and M. Cherney and A. Chikanian and W. Christie and Coffin, {J. P.} and Cormier, {T. M.} and Cramer, {J. G.} and Crawford, {H. J.} and J. Schambach and Zo{\l}nierczuk, {P. A.}",

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

year = "2004",

month = mar,

day = "5",

doi = "10.1103/PhysRevLett.92.092301",

language = "English",

volume = "92",

pages = "092301--1--092301--6",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "9",

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TY - JOUR

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, M.

AU - Chikanian, A.

AU - Christie, W.

AU - Coffin, J. P.

AU - Cormier, T. M.

AU - Cramer, J. G.

AU - Crawford, H. J.

AU - Schambach, J.

AU - Zołnierczuk, P. A.

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 - http://www.scopus.com/inward/record.url?scp=84884347678&partnerID=8YFLogxK

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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