Search for direct photons from S-Au collisions at 200 GeV/nucleon

R. Baur; A. Breskin; R. Chechik; A. Drees; C. Jacob; U. Faschingbauer; P. Fischer; Z. Fraenkel; E. Gatti; P. Glässel; Th Günzel; C. P. de los Heros; F. Hess; D. Irmscher; B. Lenkeit; L. H. Olsen; Y. Panebrattsev; A. Pfeiffer; I. Ravinovich; P. Rehak; A. Schön; J. Schukraft; M. Sampietro; A. Shor; H. J. Specht; V. Steiner; S. Tapprogge; G. Tel-Zur; T. Tserruya; Th Ullrich; J. P. Wurm

Search for direct photons from S-Au collisions at 200 GeV/nucleon

R. Baur
, A. Breskin
, R. Chechik
, A. Drees
, C. Jacob
, U. Faschingbauer
, P. Fischer
, Z. Fraenkel
, E. Gatti
, P. Glässel
, Th Günzel
, C. P. de los Heros
, F. Hess
, D. Irmscher
, B. Lenkeit
, L. H. Olsen
, Y. Panebrattsev
, A. Pfeiffer
, I. Ravinovich
, P. Rehak

A. Schön, J. Schukraft, M. Sampietro, A. Shor, H. J. Specht, V. Steiner, S. Tapprogge, G. Tel-Zur, T. Tserruya, Th Ullrich, J. P. Wurm

Physics and Astronomy

Heidelberg University
Weizmann Institute of Science
Max Planck Institute for Nuclear Physics
Polytechnic University of Milan
Brookhaven National Laboratory
CERN

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

1 Scopus citations

Abstract

The CERES experiment has measured inclusive photon production in S-Au collisions of 200 GeV/nucleon at the CERN SPS. No evidence for direct emission of photons was found. For the kinematic region 2.1 < y < 2.65 and 0.4 GeV/c < p⊥ < 2.0 GeV/c the yield and p⊥-dependence of the observed photons are well reproduced by hadron decays. Furthermore, their production rate is found to be proportional to the charged particle density. The systematic errors comparing the measured and expected photon yield result in an upper limit of 14% for the emission of direct photons in central S-Au collisions. For a photon source with a yield depending quadratically on the charged particle density the limit can be reduced to 7%.

Original language	English
Pages (from-to)	571-577
Number of pages	7
Journal	European Physical Journal C
Volume	71
Issue number	1
State	Published - 2011

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Baur, R., Breskin, A., Chechik, R., Drees, A., Jacob, C., Faschingbauer, U., Fischer, P., Fraenkel, Z., 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., ... Wurm, J. P. (2011). Search for direct photons from S-Au collisions at 200 GeV/nucleon. European Physical Journal C, 71(1), 571-577.

@article{590cafc61d0b4ff6b98903e4366e1a86,

title = "Search for direct photons from S-Au collisions at 200 GeV/nucleon",

abstract = "The CERES experiment has measured inclusive photon production in S-Au collisions of 200 GeV/nucleon at the CERN SPS. No evidence for direct emission of photons was found. For the kinematic region 2.1 < y < 2.65 and 0.4 GeV/c < p⊥ < 2.0 GeV/c the yield and p⊥-dependence of the observed photons are well reproduced by hadron decays. Furthermore, their production rate is found to be proportional to the charged particle density. The systematic errors comparing the measured and expected photon yield result in an upper limit of 14\% for the emission of direct photons in central S-Au collisions. For a photon source with a yield depending quadratically on the charged particle density the limit can be reduced to 7\%.",

author = "R. Baur and A. Breskin and R. Chechik and A. Drees and C. Jacob and U. Faschingbauer and P. Fischer and Z. Fraenkel and E. Gatti and P. Gl{\"a}ssel and Th G{\"u}nzel and \{de los Heros\}, \{C. P.\} and F. Hess and D. Irmscher and B. Lenkeit and Olsen, \{L. H.\} and Y. Panebrattsev and A. Pfeiffer and I. Ravinovich and P. Rehak and A. Sch{\"o}n and J. Schukraft and M. Sampietro and A. Shor and Specht, \{H. J.\} and V. Steiner and S. Tapprogge and G. Tel-Zur and T. Tserruya and Th Ullrich and Wurm, \{J. P.\}",

year = "2011",

language = "English",

volume = "71",

pages = "571--577",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "1",

}

Baur, R, Breskin, A, Chechik, R, Drees, A, Jacob, C, Faschingbauer, U, Fischer, P, Fraenkel, Z, Gatti, E, Glässel, P, Günzel, T, de los Heros, CP, Hess, F, Irmscher, D, Lenkeit, B, Olsen, LH, Panebrattsev, Y, Pfeiffer, A, Ravinovich, I, Rehak, P, Schön, A, Schukraft, J, Sampietro, M, Shor, A, Specht, HJ, Steiner, V, Tapprogge, S, Tel-Zur, G, Tserruya, T, Ullrich, T & Wurm, JP 2011, 'Search for direct photons from S-Au collisions at 200 GeV/nucleon', European Physical Journal C, vol. 71, no. 1, pp. 571-577.

TY - JOUR

T1 - Search for direct photons from S-Au collisions at 200 GeV/nucleon

AU - Baur, R.

AU - Breskin, A.

AU - Chechik, R.

AU - Drees, A.

AU - Jacob, C.

AU - Faschingbauer, U.

AU - Fischer, P.

AU - Fraenkel, Z.

AU - Gatti, E.

AU - Glässel, P.

AU - Günzel, Th

AU - de los Heros, C. P.

AU - Hess, F.

AU - Irmscher, D.

AU - Lenkeit, B.

AU - Olsen, L. H.

AU - Panebrattsev, Y.

AU - Pfeiffer, A.

AU - Ravinovich, I.

AU - Rehak, P.

AU - Schön, A.

AU - Schukraft, J.

AU - Sampietro, M.

AU - Shor, A.

AU - Specht, H. J.

AU - Steiner, V.

AU - Tapprogge, S.

AU - Tel-Zur, G.

AU - Tserruya, T.

AU - Ullrich, Th

AU - Wurm, J. P.

PY - 2011

Y1 - 2011

N2 - The CERES experiment has measured inclusive photon production in S-Au collisions of 200 GeV/nucleon at the CERN SPS. No evidence for direct emission of photons was found. For the kinematic region 2.1 < y < 2.65 and 0.4 GeV/c < p⊥ < 2.0 GeV/c the yield and p⊥-dependence of the observed photons are well reproduced by hadron decays. Furthermore, their production rate is found to be proportional to the charged particle density. The systematic errors comparing the measured and expected photon yield result in an upper limit of 14% for the emission of direct photons in central S-Au collisions. For a photon source with a yield depending quadratically on the charged particle density the limit can be reduced to 7%.

AB - The CERES experiment has measured inclusive photon production in S-Au collisions of 200 GeV/nucleon at the CERN SPS. No evidence for direct emission of photons was found. For the kinematic region 2.1 < y < 2.65 and 0.4 GeV/c < p⊥ < 2.0 GeV/c the yield and p⊥-dependence of the observed photons are well reproduced by hadron decays. Furthermore, their production rate is found to be proportional to the charged particle density. The systematic errors comparing the measured and expected photon yield result in an upper limit of 14% for the emission of direct photons in central S-Au collisions. For a photon source with a yield depending quadratically on the charged particle density the limit can be reduced to 7%.

UR - https://www.scopus.com/pages/publications/84875885269

M3 - Article

AN - SCOPUS:84875885269

SN - 1434-6044

VL - 71

SP - 571

EP - 577

JO - European Physical Journal C

JF - European Physical Journal C

IS - 1

ER -

Search for direct photons from S-Au collisions at 200 GeV/nucleon

Abstract

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