Aggarwal, M. M. ; Sinha, B. C. ; et., al (2000) Observation of direct photons in Central 158A GeV 208P208b+Pb collisions Physical Review Letters, 85 (17). pp. 3595-3599. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v85/i17/p3595_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.85.3595
Abstract
A measurement of direct photon production in 208Pb+208Pb collisions at 158A GeV has been carried out in the CERN WA98 experiment. The invariant yield of direct photons in central collisions is extracted as a function of transverse momentum in the interval 0.5 < pT < 4GeV/c. A significant direct photon signal, compared to statistical and systematical errors, is seen at pT > 1.5GeV/c. The result constitutes the first observation of direct photons in ultrarelativistic heavy-ion collisions. It could be significant for diagnosis of quark-gluon-plasma formation.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 70325 |
| Deposited On: | 21 Nov 2011 08:50 |
| Last Modified: | 21 Nov 2011 08:50 |
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