Production of direct photons and neutral mesons at large transverse momenta by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>−</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>p</mml:mi></mml:math>beams at 500 GeV/<i>c</i>

Alverson, G.; Baker, W.; Ballocchi, G.; Benson, R.; Berg, D.; Blusk, S.; Bromberg, C.; Brown, D. S.; Carey, David C.; Chand, T.; Chandlee, C.; Choudhary, B. C.; Chung, W. H.; Barbaro, L. de; DeSoi, W.; Długosz, W.; Dunlea, J.; Easo, S.; Engels, E.; Faissler, W.; Fanourakis, G.; Ferbel, T.; Garelick, D.; Ginther, G.; Glass, G.; Glaubman, M.; Gutiérrez, P.; Hartman, K.; Huston, J.; Johnstone, C.; Kapoor, V.; Kourbanis, I.; Lanaro, A.; Lirakis, C.; Lobkowicz, F.; Lukens, P.; Mani, S.; Maul, A.; Mansour, J.; Miller, R.; Nelson, Charles A.; Oh, B.Y.; Orris, D.; Pothier, E.; Prebys, E.; Rajaram, B. M.; Roser, R.; Ruddick, K.; Shepard, P. F.; Shivpuri, R. K.; Sinanidis, A.; Skow, D.; Slattery, P.; Sorrell, L.; Toothacker, W. S.; Varelas, N.; Weerasundara, D.; Whitmore, J.; Wu, G.; Yasuda, T.; Yosef, C.; Zieliński, M.

doi:10.1103/physrevd.48.5

Cited by 49 publications

(28 citation statements)

References 64 publications

(11 reference statements)

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“…For the latest E706 data, details on energy scale uncertainty are available. For other issues, we comment on the early data analysis [7] which may not apply for the large statistical sample. It would be interesting to have such information on the large statistical sample for a detailed comparison between data sets.…”

Section: Experimental Data Setsmentioning

confidence: 99%

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A critical phenomenological study of inclusive photon production in hadronic collisions

et al. 1999

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We discuss fixed target and ISR inclusive photon production and attempt a comparison between theory and experiments. The dependence of the theoretical predictions on the structure functions, and on the renormalization and factorization scales is investigated. The main result of this study is that the data cannot be simultaneously fitted with a single set of scales and structure functions. On the other hand, there is no need for an additional intrinsic k T to force the agreement between QCD predictions and experiments, with the possible exception of one data set. Since the data cover almost overlapping kinematical ranges this raises the question of consistency among data sets. A comparative discussion of some possible sources of experimental uncertainties is sketched.hep-ph/9811382 LAPTH-704/98 LPTHE-Orsay/98/69

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Section: Experimental Data Setsmentioning

confidence: 99%

“…Despite many years of intense experimental [1,2,3,4,5,6,7,8,9,10] and theoretical [11,12,13,14] efforts the inclusive production of prompt photons in hadronic collisions does not appear to be fully understood. No consensus has been reached concerning the phenomenology of these processes.…”

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confidence: 99%

A critical phenomenological study of inclusive photon production in hadronic collisions

et al. 1999

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“…As with the electrons, therefore, our estimated low energy proton flux is conservatively high. Unlike electrons, which can generate bremsstrahlung photons with nearly the full primary electron energy, protons collisions generate γ-rays primarily through π 0 decays (direct γ-ray production is only at the level of 10% that of π 0 s at 500 GeV/c, for example [53]), where the secondary π 0 s carry only a fraction of the primary proton energy. Therefore, even though the CR p/e ratio is ∼ 10 2 , we do not need to follow 10 9 protons (compared to 10 7 electrons) through the detector.…”

Section: Instrumental Backgrounds To the Egrb Measurementmentioning

confidence: 99%

The gamma-ray detection capabilities of the Alpha Magnetic Spectrometer

Battiston

Biasini

Fiandrini

et al. 2000

Astroparticle Physics

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“…Their production probes the underlying partonic process and can provide information on the structure of the proton. Processes of this type have been studied in a number of fixed-target and hadron-collider experiments [1][2][3][4][5][6][7][8][9][10]. The production of isolated photons in photoproduction, where the incoming photon is quasi-real, was previously studied at HERA by the ZEUS and H1 collaborations [11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

Abramowicz

Abt

Adamczyk

et al. 2018

J. High Energ. Phys.

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Isolated photons with high transverse energy have been studied in deep inelastic ep scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb −1 in the range of exchanged-photon virtuality 10-350 GeV 2 . Outgoing isolated photons with transverse energy 4 < E γ T < 15 GeV and pseudorapidity −0.7 < η γ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < E jet T < 35 GeV and −1.5 < η jet < 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the k T -factorisation approach.

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Production of direct photons and neutral mesons at large transverse momenta byπ−andpbeams at 500 GeV/c

Cited by 49 publications

References 64 publications

A critical phenomenological study of inclusive photon production in hadronic collisions

A critical phenomenological study of inclusive photon production in hadronic collisions

The gamma-ray detection capabilities of the Alpha Magnetic Spectrometer

Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

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