Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A   GeV / c

D. Adamová; G. Agakichiev; D. Antończyk; H. Appelshäuser; V. Belaga; J. Bielcikova; P. Braun-Munzinger; O. Busch; A. Cherlin; S. Damjanović; T. Dietel; L. Dietrich; A. Drees; W. Dubitzky; S. I. Esumi; K. Filimonov; K. Fomenko; Z. Fraenkel; C. Garabatos; P. Glässel; J. Holeczek; V. Kushpil; A. Maas; A. Marín; J. Milošević; A. Milov; D. Miśkowiec; Yu Panebrattsev; O. Petchenova; V. Petráček; A. Pfeiffer; J. Rak; I. Ravinovich; P. Rehak; H. Sako; W. Schmitz; S. Sedykh; S. Shimansky; J. Stachel; M. Šumbera; H. Tilsner; I. Tserruya; J. P. Wessels; T. Wienold; J. P. Wurm; W. Xie; S. Yurevich; V. Yurevich

doi:10.1016/j.physletb.2008.07.104

Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c

D. Adamová
, G. Agakichiev
, D. Antończyk
, H. Appelshäuser
, V. Belaga
, J. Bielcikova
, P. Braun-Munzinger
, O. Busch
, A. Cherlin
, S. Damjanović
, T. Dietel
, L. Dietrich
, A. Drees
, W. Dubitzky
, S. I. Esumi
, K. Filimonov
, K. Fomenko
, Z. Fraenkel
, C. Garabatos
, P. Glässel

J. Holeczek, V. Kushpil, A. Maas, A. Marín, J. Milošević, A. Milov, D. Miśkowiec, Yu Panebrattsev, O. Petchenova, V. Petráček, A. Pfeiffer, J. Rak, I. Ravinovich, P. Rehak, H. Sako, W. Schmitz, S. Sedykh, S. Shimansky, J. Stachel, M. Šumbera, H. Tilsner, I. Tserruya, J. P. Wessels, T. Wienold, J. P. Wurm, W. Xie, S. Yurevich, V. Yurevich

Physics and Astronomy

Czech Academy of Sciences
GSI Helmholtz Centre for Heavy Ion Research
Goethe University Frankfurt
Joint Institute for Nuclear Research
Heidelberg University
Weizmann Institute of Science
CERN
Max Planck Institute for Nuclear Physics
Brookhaven National Laboratory
University of Münster

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

104 Scopus citations

Abstract

We present a measurement of e⁺ e^- pair production in central Pb{single bond}Au collisions at 158 A GeV / c. As reported earlier, a significant excess of the e⁺ e^- pair yield over the expectation from hadron decays is observed. The improved mass resolution of the present data set, recorded with the upgraded CERES experiment at the CERN-SPS, allows for a comparison of the data with different theoretical approaches. The data clearly favor a substantial in-medium broadening of the ρ spectral function over a density-dependent shift of the ρ pole mass. The in-medium broadening model implies that baryon induced interactions are the key mechanism to the observed modifications of the ρ meson at SPS energy.

Original language	English
Pages (from-to)	425-429
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	666
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2008.07.104
State	Published - Sep 11 2008

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Adamová, D., Agakichiev, G., Antończyk, D., Appelshäuser, H., Belaga, V., Bielcikova, J., Braun-Munzinger, P., Busch, O., Cherlin, A., Damjanović, S., Dietel, T., Dietrich, L., Drees, A., Dubitzky, W., Esumi, S. I., Filimonov, K., Fomenko, K., Fraenkel, Z., Garabatos, C., ... Yurevich, V. (2008). Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 666(5), 425-429. https://doi.org/10.1016/j.physletb.2008.07.104

@article{c4784fdb454d428e93474615dbde00e4,

title = "Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c",

abstract = "We present a measurement of e+ e- pair production in central Pb\{single bond\}Au collisions at 158 A GeV / c. As reported earlier, a significant excess of the e+ e- pair yield over the expectation from hadron decays is observed. The improved mass resolution of the present data set, recorded with the upgraded CERES experiment at the CERN-SPS, allows for a comparison of the data with different theoretical approaches. The data clearly favor a substantial in-medium broadening of the ρ spectral function over a density-dependent shift of the ρ pole mass. The in-medium broadening model implies that baryon induced interactions are the key mechanism to the observed modifications of the ρ meson at SPS energy.",

author = "D. Adamov{\'a} and G. Agakichiev and D. Anto{\'n}czyk and H. Appelsh{\"a}user and V. Belaga and J. Bielcikova and P. Braun-Munzinger and O. Busch and A. Cherlin and S. Damjanovi{\'c} and T. Dietel and L. Dietrich and A. Drees and W. Dubitzky and Esumi, \{S. I.\} and K. Filimonov and K. Fomenko and Z. Fraenkel and C. Garabatos and P. Gl{\"a}ssel and J. Holeczek and V. Kushpil and A. Maas and A. Mar{\'i}n and J. Milo{\v s}evi{\'c} and A. Milov and D. Mi{\'s}kowiec and Yu Panebrattsev and O. Petchenova and V. Petr{\'a}{\v c}ek and A. Pfeiffer and J. Rak and I. Ravinovich and P. Rehak and H. Sako and W. Schmitz and S. Sedykh and S. Shimansky and J. Stachel and M. {\v S}umbera and H. Tilsner and I. Tserruya and Wessels, \{J. P.\} and T. Wienold and Wurm, \{J. P.\} and W. Xie and S. Yurevich and V. Yurevich",

year = "2008",

month = sep,

day = "11",

doi = "10.1016/j.physletb.2008.07.104",

language = "English",

volume = "666",

pages = "425--429",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "5",

}

Adamová, D, Agakichiev, G, Antończyk, D, Appelshäuser, H, Belaga, V, Bielcikova, J, Braun-Munzinger, P, Busch, O, Cherlin, A, Damjanović, S, Dietel, T, Dietrich, L, Drees, A, Dubitzky, W, Esumi, SI, Filimonov, K, Fomenko, K, Fraenkel, Z, Garabatos, C, Glässel, P, Holeczek, J, Kushpil, V, Maas, A, Marín, A, Milošević, J, Milov, A, Miśkowiec, D, Panebrattsev, Y, Petchenova, O, Petráček, V, Pfeiffer, A, Rak, J, Ravinovich, I, Rehak, P, Sako, H, Schmitz, W, Sedykh, S, Shimansky, S, Stachel, J, Šumbera, M, Tilsner, H, Tserruya, I, Wessels, JP, Wienold, T, Wurm, JP, Xie, W, Yurevich, S & Yurevich, V 2008, 'Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 666, no. 5, pp. 425-429. https://doi.org/10.1016/j.physletb.2008.07.104

Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c. / Adamová, D.; Agakichiev, G.; Antończyk, D. et al.
In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 666, No. 5, 11.09.2008, p. 425-429.

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

TY - JOUR

T1 - Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c

AU - Adamová, D.

AU - Agakichiev, G.

AU - Antończyk, D.

AU - Appelshäuser, H.

AU - Belaga, V.

AU - Bielcikova, J.

AU - Braun-Munzinger, P.

AU - Busch, O.

AU - Cherlin, A.

AU - Damjanović, S.

AU - Dietel, T.

AU - Dietrich, L.

AU - Drees, A.

AU - Dubitzky, W.

AU - Esumi, S. I.

AU - Filimonov, K.

AU - Fomenko, K.

AU - Fraenkel, Z.

AU - Garabatos, C.

AU - Glässel, P.

AU - Holeczek, J.

AU - Kushpil, V.

AU - Maas, A.

AU - Marín, A.

AU - Milošević, J.

AU - Milov, A.

AU - Miśkowiec, D.

AU - Panebrattsev, Yu

AU - Petchenova, O.

AU - Petráček, V.

AU - Pfeiffer, A.

AU - Rak, J.

AU - Ravinovich, I.

AU - Rehak, P.

AU - Sako, H.

AU - Schmitz, W.

AU - Sedykh, S.

AU - Shimansky, S.

AU - Stachel, J.

AU - Šumbera, M.

AU - Tilsner, H.

AU - Tserruya, I.

AU - Wessels, J. P.

AU - Wienold, T.

AU - Wurm, J. P.

AU - Xie, W.

AU - Yurevich, S.

AU - Yurevich, V.

PY - 2008/9/11

Y1 - 2008/9/11

N2 - We present a measurement of e+ e- pair production in central Pb{single bond}Au collisions at 158 A GeV / c. As reported earlier, a significant excess of the e+ e- pair yield over the expectation from hadron decays is observed. The improved mass resolution of the present data set, recorded with the upgraded CERES experiment at the CERN-SPS, allows for a comparison of the data with different theoretical approaches. The data clearly favor a substantial in-medium broadening of the ρ spectral function over a density-dependent shift of the ρ pole mass. The in-medium broadening model implies that baryon induced interactions are the key mechanism to the observed modifications of the ρ meson at SPS energy.

AB - We present a measurement of e+ e- pair production in central Pb{single bond}Au collisions at 158 A GeV / c. As reported earlier, a significant excess of the e+ e- pair yield over the expectation from hadron decays is observed. The improved mass resolution of the present data set, recorded with the upgraded CERES experiment at the CERN-SPS, allows for a comparison of the data with different theoretical approaches. The data clearly favor a substantial in-medium broadening of the ρ spectral function over a density-dependent shift of the ρ pole mass. The in-medium broadening model implies that baryon induced interactions are the key mechanism to the observed modifications of the ρ meson at SPS energy.

UR - https://www.scopus.com/pages/publications/51749088375

U2 - 10.1016/j.physletb.2008.07.104

DO - 10.1016/j.physletb.2008.07.104

M3 - Article

AN - SCOPUS:51749088375

SN - 0370-2693

VL - 666

SP - 425

EP - 429

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 5

ER -

Modification of the ρ meson detected by low-mass electron-positron pairs in central Pb‒Au collisions at 158 A GeV / c

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