Soft photon production in 450 GeV/c p-Be collisions

J. Antos; H. Beker; S. Brons; K. Bussmann; S. Dagan; A. Drees; C. Erd; M. J. Esten; C. W. Fabjan; P. Glässel; U. Goerlach; V. Hedberg; D. Lissauer; M. A. Mazzoni; N. A. McCubbin; M. Neubert; P. Nevski; L. Olsen; A. Pfeiffer; A. Ray; J. Schukraft; D. Shapira; J. Soltani; H. J. Specht; I. Stumer; J. Thompson; R. J. Veenhof; W. J. Willis; C. Woody

doi:10.1007/BF01562546

Soft photon production in 450 GeV/c p-Be collisions

J. Antos, H. Beker, S. Brons, K. Bussmann, S. Dagan, A. Drees, C. Erd, M. J. Esten, C. W. Fabjan, P. Glässel, U. Goerlach, V. Hedberg, D. Lissauer, M. A. Mazzoni, N. A. McCubbin, M. Neubert, P. Nevski, L. Olsen, A. Pfeiffer, A. RayJ. Schukraft, D. Shapira, J. Soltani, H. J. Specht, I. Stumer, J. Thompson, R. J. Veenhof, W. J. Willis, C. Woody

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Abstract

We have measured the inclusive p_T spectra of soft photons produced at central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1<p_T<20 MeV/c an excess of photons over those expected from hadronic decays is observed. This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum.

Original language	English
Pages (from-to)	547-553
Number of pages	7
Journal	European Physical Journal C
Volume	59
Issue number	4
DOIs	https://doi.org/10.1007/BF01562546
State	Published - 1 Dec 1993
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Antos, J., Beker, H., Brons, S., Bussmann, K., Dagan, S., Drees, A., Erd, C., Esten, M. J., Fabjan, C. W., Glässel, P., Goerlach, U., Hedberg, V., Lissauer, D., Mazzoni, M. A., McCubbin, N. A., Neubert, M., Nevski, P., Olsen, L., Pfeiffer, A., ... Woody, C. (1993). Soft photon production in 450 GeV/c p-Be collisions. European Physical Journal C, 59(4), 547-553. https://doi.org/10.1007/BF01562546

@article{ca841da43d904e9fbb5aec85fc3f47fb,

title = "Soft photon production in 450 GeV/c p-Be collisions",

abstract = "We have measured the inclusive pT spectra of soft photons produced at central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1T<20 MeV/c an excess of photons over those expected from hadronic decays is observed. This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum.",

author = "J. Antos and H. Beker and S. Brons and K. Bussmann and S. Dagan and A. Drees and C. Erd and Esten, {M. J.} and Fabjan, {C. W.} and P. Gl{\"a}ssel and U. Goerlach and V. Hedberg and D. Lissauer and Mazzoni, {M. A.} and McCubbin, {N. A.} and M. Neubert and P. Nevski and L. Olsen and A. Pfeiffer and A. Ray and J. Schukraft and D. Shapira and J. Soltani and Specht, {H. J.} and I. Stumer and J. Thompson and Veenhof, {R. J.} and Willis, {W. J.} and C. Woody",

year = "1993",

month = dec,

day = "1",

doi = "10.1007/BF01562546",

language = "English",

volume = "59",

pages = "547--553",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "4",

}

Antos, J, Beker, H, Brons, S, Bussmann, K, Dagan, S, Drees, A, Erd, C, Esten, MJ, Fabjan, CW, Glässel, P, Goerlach, U, Hedberg, V, Lissauer, D, Mazzoni, MA, McCubbin, NA, Neubert, M, Nevski, P, Olsen, L, Pfeiffer, A, Ray, A, Schukraft, J, Shapira, D, Soltani, J, Specht, HJ, Stumer, I, Thompson, J, Veenhof, RJ, Willis, WJ & Woody, C 1993, 'Soft photon production in 450 GeV/c p-Be collisions', European Physical Journal C, vol. 59, no. 4, pp. 547-553. https://doi.org/10.1007/BF01562546

TY - JOUR

T1 - Soft photon production in 450 GeV/c p-Be collisions

AU - Antos, J.

AU - Beker, H.

AU - Brons, S.

AU - Bussmann, K.

AU - Dagan, S.

AU - Drees, A.

AU - Erd, C.

AU - Esten, M. J.

AU - Fabjan, C. W.

AU - Glässel, P.

AU - Goerlach, U.

AU - Hedberg, V.

AU - Lissauer, D.

AU - Mazzoni, M. A.

AU - McCubbin, N. A.

AU - Neubert, M.

AU - Nevski, P.

AU - Olsen, L.

AU - Pfeiffer, A.

AU - Ray, A.

AU - Schukraft, J.

AU - Shapira, D.

AU - Soltani, J.

AU - Specht, H. J.

AU - Stumer, I.

AU - Thompson, J.

AU - Veenhof, R. J.

AU - Willis, W. J.

AU - Woody, C.

PY - 1993/12/1

Y1 - 1993/12/1

N2 - We have measured the inclusive pT spectra of soft photons produced at central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1T<20 MeV/c an excess of photons over those expected from hadronic decays is observed. This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum.

AB - We have measured the inclusive pT spectra of soft photons produced at central and backward rapidities in 450 GeV/c p-Be collisions down to 1 MeV/c in transverse momentum. In the region 1T<20 MeV/c an excess of photons over those expected from hadronic decays is observed. This excess is comparable, within systematic errors, with estimates of direct photons produced via hadronic bremsstrahlung. An upper limit is derived on the presence of additional sources of direct photons at small transverse momentum.

UR - http://www.scopus.com/inward/record.url?scp=0000357231&partnerID=8YFLogxK

U2 - 10.1007/BF01562546

DO - 10.1007/BF01562546

M3 - Article

AN - SCOPUS:0000357231

VL - 59

SP - 547

EP - 553

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 4

ER -

Soft photon production in 450 GeV/c p-Be collisions

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