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

doi:10.1007/JHEP01(2018)032

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

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Abstract

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 GeV². Outgoing isolated photons with transverse energy 4 < E_T ^γ < 15 GeV and pseudorapidity − 0.7 < η^γ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < E_T ^jet < 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.

Original language	English
Article number	32
Journal	Journal of High Energy Physics
Volume	2018
Issue number	1
DOIs	https://doi.org/10.1007/JHEP01(2018)032
State	Published - 1 Jan 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018, The Author(s).

Keywords

Lepton-Nucleon Scattering (experiments)
Photon production
QCD

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1007/JHEP01(2018)032

Cite this

@article{17accdcfea9c4bc781f1f1fb3b9dcae7,

title = "Further studies of isolated photon production with a jet in deep inelastic scattering at HERA",

abstract = "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 GeV2. Outgoing isolated photons with transverse energy 4 < ET γ < 15 GeV and pseudorapidity − 0.7 < ηγ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < ET jet < 35 GeV and −1.5 < ηjet< 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 kT -factorisation approach.",

keywords = "Lepton-Nucleon Scattering (experiments), Photon production, QCD",

author = "H. Abramowicz and I. Abt and L. Adamczyk and M. Adamus and R. Aggarwal and S. Antonelli and V. Aushev and Y. Aushev and O. Behnke and U. Behrens and A. Bertolin and I. Bloch and I. Brock and Brook, \{N. H.\} and R. Brugnera and A. Bruni and Bussey, \{P. J.\} and A. Caldwell and M. Capua and Catterall, \{C. D.\} and J. Chwastowski and J. Ciborowski and R. Ciesielski and Cooper-Sarkar, \{A. M.\} and M. Corradi and Dementiev, \{R. K.\} and Devenish, \{R. C.E.\} and S. Dusini and B. Foster and G. Gach and E. Gallo and A. Garfagnini and A. Geiser and A. Gizhko and Gladilin, \{L. K.\} and Golubkov, \{Yu A.\} and G. Grzelak and M. Guzik and C. Gwenlan and O. Hlushchenko and D. Hochman and R. Hori and Ibrahim, \{Z. A.\} and Y. Iga and M. Ishitsuka and Jomhari, \{N. Z.\} and I. Kadenko and S. Kananov and U. Karshon and P. Kaur",

note = "Publisher Copyright: {\textcopyright} 2018, The Author(s).",

year = "2018",

month = jan,

day = "1",

doi = "10.1007/JHEP01(2018)032",

language = "English",

volume = "2018",

journal = "Journal of High Energy Physics",

issn = "1029-8479",

publisher = "Springer Verlag",

number = "1",

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TY - JOUR

T1 - Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

AU - Abramowicz, H.

AU - Abt, I.

AU - Adamczyk, L.

AU - Adamus, M.

AU - Aggarwal, R.

AU - Antonelli, S.

AU - Aushev, V.

AU - Aushev, Y.

AU - Behnke, O.

AU - Behrens, U.

AU - Bertolin, A.

AU - Bloch, I.

AU - Brock, I.

AU - Brook, N. H.

AU - Brugnera, R.

AU - Bruni, A.

AU - Bussey, P. J.

AU - Caldwell, A.

AU - Capua, M.

AU - Catterall, C. D.

AU - Chwastowski, J.

AU - Ciborowski, J.

AU - Ciesielski, R.

AU - Cooper-Sarkar, A. M.

AU - Corradi, M.

AU - Dementiev, R. K.

AU - Devenish, R. C.E.

AU - Dusini, S.

AU - Foster, B.

AU - Gach, G.

AU - Gallo, E.

AU - Garfagnini, A.

AU - Geiser, A.

AU - Gizhko, A.

AU - Gladilin, L. K.

AU - Golubkov, Yu A.

AU - Grzelak, G.

AU - Guzik, M.

AU - Gwenlan, C.

AU - Hlushchenko, O.

AU - Hochman, D.

AU - Hori, R.

AU - Ibrahim, Z. A.

AU - Iga, Y.

AU - Ishitsuka, M.

AU - Jomhari, N. Z.

AU - Kadenko, I.

AU - Kananov, S.

AU - Karshon, U.

AU - Kaur, P.

PY - 2018/1/1

Y1 - 2018/1/1

N2 - 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 GeV2. Outgoing isolated photons with transverse energy 4 < ET γ < 15 GeV and pseudorapidity − 0.7 < ηγ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < ET jet < 35 GeV and −1.5 < ηjet< 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 kT -factorisation approach.

AB - 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 GeV2. Outgoing isolated photons with transverse energy 4 < ET γ < 15 GeV and pseudorapidity − 0.7 < ηγ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 < ET jet < 35 GeV and −1.5 < ηjet< 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 kT -factorisation approach.

KW - Lepton-Nucleon Scattering (experiments)

KW - Photon production

KW - QCD

UR - https://www.scopus.com/pages/publications/85041332632

U2 - 10.1007/JHEP01(2018)032

DO - 10.1007/JHEP01(2018)032

M3 - Article

AN - SCOPUS:85041332632

SN - 1029-8479

VL - 2018

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 1

M1 - 32

ER -

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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