Measurement of inclusive prompt photon photoproduction at HERA

Zeus Collaboration

Research output: Contribution to journalArticle

66 Citations (Scopus)

Abstract

First inclusive measurements of isolated prompt photons in photoproduction at the HERA ep collider have been made with the ZEUS detector, using an integrated luminosity of 38.4 pb-1. Cross sections are given as a function of the pseudorapidity and the transverse energy (ηγ, Eγ . of the photon, for E>5 GeV in the γ p centre-of-mass energy range T T 134-285 GeV. Comparisons are made with predictions from Monte Carlo models having leading-logarithm parton showers, and with next-To-leading-order QCD calculations, using currently available parameterisations of the photon structure. For forward ηγ (proton direction. good agreement is found, but in the rear direction all predictions fall below the data.

Original languageEnglish
Pages (from-to)175-188
Number of pages14
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume472
Issue number1-2
DOIs
Publication statusPublished - 2000 Jan 13

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photoproduction
photons
predictions
showers
logarithms
parameterization
partons
center of mass
quantum chromodynamics
luminosity
protons
energy
detectors
cross sections

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Measurement of inclusive prompt photon photoproduction at HERA. / Zeus Collaboration.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 472, No. 1-2, 13.01.2000, p. 175-188.

Research output: Contribution to journalArticle

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abstract = "First inclusive measurements of isolated prompt photons in photoproduction at the HERA ep collider have been made with the ZEUS detector, using an integrated luminosity of 38.4 pb-1. Cross sections are given as a function of the pseudorapidity and the transverse energy (ηγ, Eγ . of the photon, for E>5 GeV in the γ p centre-of-mass energy range T T 134-285 GeV. Comparisons are made with predictions from Monte Carlo models having leading-logarithm parton showers, and with next-To-leading-order QCD calculations, using currently available parameterisations of the photon structure. For forward ηγ (proton direction. good agreement is found, but in the rear direction all predictions fall below the data.",
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AU - Breitweg, J.

AU - Chekanov, S.

AU - Derrick, M.

AU - Krakauer, D.

AU - Magill, S.

AU - Musgrave, B.

AU - Pellegrino, A.

AU - Repond, J.

AU - Stanek, R.

AU - Yoshida, R.

AU - Mattingly, M. C.K.

AU - Abbiendi, G.

AU - Anselmo, F.

AU - Antonioli, P.

AU - Bari, G.

AU - Basile, M.

AU - Bellagamba, L.

AU - Boscherini, D.

AU - Bruni, A.

AU - Bruni, G.

AU - Cara Romeo, G.

AU - Castellini, G.

AU - Cifarelli, L.

AU - Cindolo, F.

AU - Contin, A.

AU - Coppola, N.

AU - Corradi, M.

AU - De Pasquale, S.

AU - Giusti, P.

AU - Iacobucci, G.

AU - Laurenti, G.

AU - Levi, G.

AU - Margotti, A.

AU - Massam, T.

AU - Nania, R.

AU - Palmonari, F.

AU - Pesci, A.

AU - Polini, A.

AU - Sartorelli, G.

AU - Zamora Garcia, Y.

AU - Zichichi, A.

AU - Amelung, C.

AU - Bornheim, A.

AU - Brock, I.

AU - Coböken, K.

AU - Crittenden, J.

AU - Deffner, R.

AU - Hartmann, H.

AU - Heinloth, K.

AU - Park, Sung Keun

PY - 2000/1/13

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N2 - First inclusive measurements of isolated prompt photons in photoproduction at the HERA ep collider have been made with the ZEUS detector, using an integrated luminosity of 38.4 pb-1. Cross sections are given as a function of the pseudorapidity and the transverse energy (ηγ, Eγ . of the photon, for E>5 GeV in the γ p centre-of-mass energy range T T 134-285 GeV. Comparisons are made with predictions from Monte Carlo models having leading-logarithm parton showers, and with next-To-leading-order QCD calculations, using currently available parameterisations of the photon structure. For forward ηγ (proton direction. good agreement is found, but in the rear direction all predictions fall below the data.

AB - First inclusive measurements of isolated prompt photons in photoproduction at the HERA ep collider have been made with the ZEUS detector, using an integrated luminosity of 38.4 pb-1. Cross sections are given as a function of the pseudorapidity and the transverse energy (ηγ, Eγ . of the photon, for E>5 GeV in the γ p centre-of-mass energy range T T 134-285 GeV. Comparisons are made with predictions from Monte Carlo models having leading-logarithm parton showers, and with next-To-leading-order QCD calculations, using currently available parameterisations of the photon structure. For forward ηγ (proton direction. good agreement is found, but in the rear direction all predictions fall below the data.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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