Inclusive jet production with virtual photons in next-to-leading order QCD

Klasen, M.; Kramer, Gisela; Pötter, B.

doi:10.1007/s100520050080

Cited by 60 publications

(162 citation statements)

References 13 publications

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“…To summarize this Section, we have shown that the cross section formulae for virtual and real photon production in hadronic collisions are intimately related in leading order O(α s ) as well as in next-to-leading order O(α For virtual photons, this singularity is replaced by a logarithmic dependence on the photon virtuality Q [20].…”

Section: (C) and 2(c)) Thementioning

confidence: 92%

Massive lepton pairs as a prompt photon surrogate

1998

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We discuss the transverse momentum distribution for the production of massive lepton-pairs in hadron reactions at fixed target and collider energies within the context of next-to-leading order perturbative quantum chromodynamics. For values of the transverse momentum Q T greater than roughly half the pair mass Q, Q T > Q/2, we show that the differential cross section is dominated by subprocesses initiated by incident gluons. Massive leptonpair differential cross sections are an advantageous source of constraints on the gluon density, free from the experimental and theoretical complications of photon isolation that beset studies of prompt photon production. We compare calculations with data and provide predictions for the differential cross section as a function of Q T in proton-antiproton reactions at center-of-mass energies of 1.8 TeV, and in proton-nucleon reactions at fixed target and LHC energies.

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Section: (C) and 2(c)) Thementioning

confidence: 92%

Massive lepton pairs as a prompt photon surrogate

1998

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“…The NLO QCD (O(α 2 s )) calculations used in the analysis presented here were computed using the program by Klasen, Kleinwort and Kramer [59]. The calculations use the phase-space-slicing method [60] with an invariant-mass cut to isolate the singular regions of the phase space.…”

Section: Next-to-leading-order Qcd Calculationsmentioning

confidence: 99%

“…58 Member of Łódź University, Poland. 59 Now at Department of Physics, Stockholm University, Stockholm, Sweden. 60 Also at Cardinal Stefan Wyszyński University, Warsaw, Poland.…”

Section: Introductionmentioning

confidence: 99%

Inclusive-jet photoproduction at HERA and determination of

Abramowicz¹,

Abt²,

Adamczyk³

et al. 2012

Nuclear Physics B

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Inclusive-jet cross sections have been measured in the reaction ep → e + jet + X for photon virtuality Q 2 < 1 GeV 2 and γp centre-of-mass energies in the region 142 < W γp < 293 GeV with the ZEUS detector at HERA using an integrated luminosity of 300 pb −1 . Jets were identified using the k T , anti-k T or SIScone jet algorithms in the laboratory frame. Single-differential cross sections are presented as functions of the jet transverse energy, E jet T , and pseudorapidity, η jet , for jets with E jet T > 17 GeV and −1 < η jet < 2.5. In addition, measurements of double-differential inclusive-jet cross sections are presented as functions of E jet T in different regions of η jet . Next-to-leading-order QCD calculations give a good description of the measurements, except for jets with low E jet T and high η jet . The influence of non-perturbative effects not related to hadronisation was studied. Measurements of the ratios of cross sections using different jet algorithms are also presented; the measured ratios are well described by calculations including up to O(α

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“…Many calculations of jet photoproduction at NLO exist [40][41][42][43][44][45][46], all of which have been compared with each other and agree to within (5 − 10)% [46,47]. The calculation used here is that of Frixione and Ridolfi [40,41], which employs the subtraction method [48] for dealing with the collinear and infra-red divergences.…”

Section: Nlo Qcd Calculationsmentioning

confidence: 99%

Dijet photoproduction at HERA and the structure of the photon

Chekanov

2002

Eur. Phys. J. C

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The dijet cross section in photoproduction has been measured with the ZEUS detector at HERA using an integrated luminosity of 38.6 pb −1 . The events were required to have a virtuality of the incoming photon, Q 2 , of less than 1 GeV 2 and a photon-proton centre-of-mass energy in the range 134 < W γp < 277 GeV. Each event contains at least two jets satisfying transverse-energy requirements of E jet1 T > 14 GeV and E jet2 T > 11 GeV and pseudorapidity requirements of −1 < η jet1,2 < 2.4. The measurements are compared to next-to-leading-order QCD predictions. The data show particular sensitivity to the density of partons in the photon, allowing the validity of the current parameterisations to be tested.

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Inclusive jet production with virtual photons in next-to-leading order QCD

Cited by 60 publications

References 13 publications

Massive lepton pairs as a prompt photon surrogate

Massive lepton pairs as a prompt photon surrogate

Inclusive-jet photoproduction at HERA and determination of

Dijet photoproduction at HERA and the structure of the photon

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