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Enhanced Production of Low-Mass Electron Pairs in 200 GeV/Nucleon S-Au Collisions at the CERN Super Proton Synchrotron
Abstract
We report on measurements of low-mass electron pairs in 450 GeV $p$-Be, $p$-Au, and 200 GeV/nucleon S-Au collisions at central rapidities. For the proton induced interactions, the low-mass spectra are, within the systematic errors, satisfactorily explained by electron pairs from hadron decays, whereas in the S-Au system an enhancement over the hadronic contributions by a factor of $5.0\ifmmode\pm\else\textpm\fi{}0.7(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}2.0(\mathrm{syst})$ in the invariant mass range $0.2<m<1.5\phantom{\rule{0ex}{0ex}}\mathrm{GeV}{/c}^{2}$ is observed. The properties of the excess suggest that it arises from two-pion annihilation $\ensuremath{\pi}\ensuremath{\pi}\ensuremath{\rightarrow}{e}^{+}{e}^{\ensuremath{-}}$.
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Cited by
Adcox, K., Adler, S. S., Afanasiev, S., Aidala, C., Ajitanand, N. N., Akiba, Y., Al-Jamel, A., Alexander, J., Amirikas, R., Aoki, K., et al. (2005) · Nuclear Physics A · doi:10.1016/j.nuclphysa.2005.03.086 · Cited by 3,025
Self-citationTHE SEARCH FOR THE QUARK-GLUON PLASMA
Harris, J. W., & Müller, B. (1996) · Annual Review of Nuclear and Particle Science · doi:10.1146/annurev.nucl.46.1.71 · Cited by 317
Rho meson propagation and dilepton enhancement in hot hadronic matter
Rapp, R., Chanfray, G., & Wambach, J. (1997) · Nuclear Physics A · doi:10.1016/s0375-9474(97)00137-1 · Cited by 305
Signatures of quark-gluon plasma formation in high energy heavy-ion collisions: a critical review
Bass, S. A., Gyulassy, M., Stöcker, H., & Greiner, W. (1999) · Journal of Physics G: Nuclear and Particle Physics · doi:10.1088/0954-3899/25/3/013 · Cited by 269
Recent results from Pb-Au collisions at 158 GeV/c per nucleon obtained with the CERES spectrometer
Lenkeit, B., Agakichiev, G., Appelshäuser, H., Baur, R., Braun-Munzinger, P., Ceretto, F., Cherlin, A., Drees, A., Esumi, S., Faschingbauer, U., et al. (1999) · Nuclear Physics A · doi:10.1016/s0375-9474(99)85005-2 · Cited by 63
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Metadata
- Authors
- Agakichiev, G., Baur, R., Breskin, A., Chechik, R., Drees, A., Jacob, C., Faschingbauer, U., Fischer, P., Fraenkel, Z., Fuchs, C., Gatti, E., Glässel, P., Günzel, T., de los Heros, C. P., Hess, F., Irmscher, D., Lenkeit, B., Olsen, L. H., Panebrattsev, Y., Pfeiffer, A., Ravinovich, I., Rehak, P., Schön, A., Schukraft, J., Sampietro, M., Shimansky, S., Shor, A., Specht, H. J., Steiner, V., Tapprogge, S., Tel-Zur, G., Tserruya, I., Ullrich, T., Wurm, J. P., & Yurevich, V.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1995-08-14
- Volume
- 75
- Issue
- 7
- Pages
- 1272-1275
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1935074445
- Cited by
- 516
- References
- 0
- FWCI
- 38.53
- Type
- journal article
- Language
- en
- Open access
- closed
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- Agakichiev, G., Baur, R., Breskin, A., Chechik, R., Drees, A., Jacob, C., Faschingbauer, U., Fischer, P., Fraenkel, Z., Fuchs, C., Gatti, E., Glässel, P., Günzel, T., de los Heros, C. P., Hess, F., Irmscher, D., Lenkeit, B., Olsen, L. H., Panebrattsev, Y., . . . Yurevich, V. (1995). Enhanced Production of Low-Mass Electron Pairs in 200 GeV/Nucleon S-Au Collisions at the CERN Super Proton Synchrotron. Physical Review Letters. https://doi.org/10.1103/physrevlett.75.1272
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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