Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS

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

doi:10.1103/PhysRevLett.91.042301

Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS

D. Adamová
, G. Agakichiev
, H. Appelshäuser
, V. Belaga
, P. Braun-Munzinger
, A. Cherlin
, S. Damjanović
, T. Dietel
, L. Dietrich
, A. Drees
, S. I. Esumi
, K. Filimonov
, K. Fomenko
, Z. Fraenkel
, C. Garabatos
, P. Glässel
, G. Hering
, J. Holeczek
, V. Kushpil
, B. Lenkeit

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

Physics and Astronomy

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

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

11 Scopus citations

Abstract

We report on first measurements of low-mass electron-positron pairs in Pb-Au collisions at the CERN SPS beam energy of [Formula presented]. The observed pair yield integrated over the range of invariant masses [Formula presented] is enhanced over the expectation from neutral meson decays by a factor of [Formula presented], somewhat larger than previously observed at the higher energy of [Formula presented]. The results are discussed with reference to model calculations based on [Formula presented] annihilation with a modified [Formula presented] propagator. They may be linked to chiral symmetry restoration and support the notion that the in-medium modifications of the [Formula presented] are more driven by baryon density than by temperature.

Original language	English
Journal	Physical Review Letters
Volume	91
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.91.042301
State	Published - Jul 22 2003

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10.1103/PhysRevLett.91.042301

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Adamová, D., Agakichiev, G., Appelshäuser, H., Belaga, V., Braun-Munzinger, P., Cherlin, A., Damjanović, S., Dietel, T., Dietrich, L., Drees, A., Esumi, S. I., Filimonov, K., Fomenko, K., Fraenkel, Z., Garabatos, C., Glässel, P., Hering, G., Holeczek, J., Kushpil, V., ... Yurevich, V. (2003). Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS. Physical Review Letters, 91(4). https://doi.org/10.1103/PhysRevLett.91.042301

@article{7e8bdff0052643e4aa9a562faac34400,

title = "Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS",

abstract = "We report on first measurements of low-mass electron-positron pairs in Pb-Au collisions at the CERN SPS beam energy of [Formula presented]. The observed pair yield integrated over the range of invariant masses [Formula presented] is enhanced over the expectation from neutral meson decays by a factor of [Formula presented], somewhat larger than previously observed at the higher energy of [Formula presented]. The results are discussed with reference to model calculations based on [Formula presented] annihilation with a modified [Formula presented] propagator. They may be linked to chiral symmetry restoration and support the notion that the in-medium modifications of the [Formula presented] are more driven by baryon density than by temperature.",

author = "D. Adamov{\'a} and G. Agakichiev and H. Appelsh{\"a}user and V. Belaga and P. Braun-Munzinger and A. Cherlin and S. Damjanovi{\'c} and T. Dietel and L. Dietrich and A. Drees and Esumi, \{S. I.\} and K. Filimonov and K. Fomenko and Z. Fraenkel and C. Garabatos and P. Gl{\"a}ssel and G. Hering and J. Holeczek and V. Kushpil and B. Lenkeit 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 M. Richter and H. Sako and W. Schmitz and S. Sedykh and W. Seipp and A. Sharma and S. Shimansky and J. Sl{\'i}vov{\'a} and Specht, \{H. J.\} and J. Stachel and M. {\v S}umbera and H. Tilsner and I. Tserruya and Wessels, \{J. P.\} and T. Wienold and B. Windelband and Wurm, \{J. P.\} and W. Xie and S. Yurevich and V. Yurevich",

year = "2003",

month = jul,

day = "22",

doi = "10.1103/PhysRevLett.91.042301",

language = "English",

volume = "91",

journal = "Physical Review Letters",

issn = "0031-9007",

number = "4",

}

Adamová, D, Agakichiev, G, Appelshäuser, H, Belaga, V, Braun-Munzinger, P, Cherlin, A, Damjanović, S, Dietel, T, Dietrich, L, Drees, A, Esumi, SI, Filimonov, K, Fomenko, K, Fraenkel, Z, Garabatos, C, Glässel, P, Hering, G, Holeczek, J, Kushpil, V, Lenkeit, B, Maas, A, Marín, A, Milošević, J, Milov, A, Miśkowiec, D, Panebrattsev, Y, Petchenova, O, Petráček, V, Pfeiffer, A, Rak, J, Ravinovich, I, Rehak, P, Richter, M, Sako, H, Schmitz, W, Sedykh, S, Seipp, W, Sharma, A, Shimansky, S, Slívová, J, Specht, HJ, Stachel, J, Šumbera, M, Tilsner, H, Tserruya, I, Wessels, JP, Wienold, T, Windelband, B, Wurm, JP, Xie, W, Yurevich, S & Yurevich, V 2003, 'Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS', Physical Review Letters, vol. 91, no. 4. https://doi.org/10.1103/PhysRevLett.91.042301

TY - JOUR

T1 - Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS

AU - Adamová, D.

AU - Agakichiev, G.

AU - Appelshäuser, H.

AU - Belaga, V.

AU - Braun-Munzinger, P.

AU - Cherlin, A.

AU - Damjanović, S.

AU - Dietel, T.

AU - Dietrich, L.

AU - Drees, A.

AU - Esumi, S. I.

AU - Filimonov, K.

AU - Fomenko, K.

AU - Fraenkel, Z.

AU - Garabatos, C.

AU - Glässel, P.

AU - Hering, G.

AU - Holeczek, J.

AU - Kushpil, V.

AU - Lenkeit, B.

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 - Richter, M.

AU - Sako, H.

AU - Schmitz, W.

AU - Sedykh, S.

AU - Seipp, W.

AU - Sharma, A.

AU - Shimansky, S.

AU - Slívová, J.

AU - Specht, H. J.

AU - Stachel, J.

AU - Šumbera, M.

AU - Tilsner, H.

AU - Tserruya, I.

AU - Wessels, J. P.

AU - Wienold, T.

AU - Windelband, B.

AU - Wurm, J. P.

AU - Xie, W.

AU - Yurevich, S.

AU - Yurevich, V.

PY - 2003/7/22

Y1 - 2003/7/22

N2 - We report on first measurements of low-mass electron-positron pairs in Pb-Au collisions at the CERN SPS beam energy of [Formula presented]. The observed pair yield integrated over the range of invariant masses [Formula presented] is enhanced over the expectation from neutral meson decays by a factor of [Formula presented], somewhat larger than previously observed at the higher energy of [Formula presented]. The results are discussed with reference to model calculations based on [Formula presented] annihilation with a modified [Formula presented] propagator. They may be linked to chiral symmetry restoration and support the notion that the in-medium modifications of the [Formula presented] are more driven by baryon density than by temperature.

AB - We report on first measurements of low-mass electron-positron pairs in Pb-Au collisions at the CERN SPS beam energy of [Formula presented]. The observed pair yield integrated over the range of invariant masses [Formula presented] is enhanced over the expectation from neutral meson decays by a factor of [Formula presented], somewhat larger than previously observed at the higher energy of [Formula presented]. The results are discussed with reference to model calculations based on [Formula presented] annihilation with a modified [Formula presented] propagator. They may be linked to chiral symmetry restoration and support the notion that the in-medium modifications of the [Formula presented] are more driven by baryon density than by temperature.

UR - https://www.scopus.com/pages/publications/84872943438

U2 - 10.1103/PhysRevLett.91.042301

DO - 10.1103/PhysRevLett.91.042301

M3 - Article

AN - SCOPUS:84872943438

SN - 0031-9007

VL - 91

JO - Physical Review Letters

JF - Physical Review Letters

IS - 4

ER -

Enhanced Production of Low-Mass Electron-Positron Pairs in 40-[Formula presented]GeV Pb-Au Collisions at the CERN SPS

Abstract

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