Measurement of dijet production at low Q² at HERA

A Aktas; Yves Coppens; John Dowell; Peter Faulkner; Yves Fleming; John Garvey; Oliver Henshaw; Carrie Johnson; Ian Kenyon; Paul Newman; Syed Rizvi; Paul Thompson; Ethan-Etienne Woehrling

doi:10.1140/epjc/s2004-01989-7

Measurement of dijet production at low Q² at HERA

A Aktas, Yves Coppens, John Dowell, Peter Faulkner, Yves Fleming, John Garvey, Oliver Henshaw, Carrie Johnson, Ian Kenyon, Paul Newman, Syed Rizvi, Paul Thompson, Ethan-Etienne Woehrling

Physics and Astronomy

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Abstract

Triple differential dijet cross sections in e(+/-)p interactions are presented in the region of photon virtualities 2 <Q(2) <80 GeV2, inelasticities 0.1 <y <0.85, jet transverse energies E*(T1) > 7GeV, E*(T2) > 5 GeV, and pseudorapidities - 2.5 <η(1)*, η(2)* <0. The measurements are made in the gamma*p centre-of-mass frame, using an integrated luminosity of 57 pb(-1). The data are compared with NLO QCD calculations and LO Monte Carlo programs with and without a resolved virtual photon contribution. NLO QCD calculations fail to describe the region of low Q(2) and low jet transverse energies, in contrast to a LO Monte Carlo generator which includes direct and resolved photon interactions with both transversely and longitudinally polarised photons. Initial and final state parton showers are tested as a mechanism for including higher order QCD effects in low E-T jet production.

Original language	English
Pages (from-to)	141
Number of pages	1
Journal	European Physical Journal C
Volume	37
Issue number	2
DOIs	https://doi.org/10.1140/epjc/s2004-01989-7
Publication status	Published - 1 Sept 2004

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title = "Measurement of dijet production at low Q² at HERA",

abstract = "Triple differential dijet cross sections in e(+/-)p interactions are presented in the region of photon virtualities 2 7GeV, E*(T2) > 5 GeV, and pseudorapidities - 2.5 <η(1)*, η(2)* <0. The measurements are made in the gamma*p centre-of-mass frame, using an integrated luminosity of 57 pb(-1). The data are compared with NLO QCD calculations and LO Monte Carlo programs with and without a resolved virtual photon contribution. NLO QCD calculations fail to describe the region of low Q(2) and low jet transverse energies, in contrast to a LO Monte Carlo generator which includes direct and resolved photon interactions with both transversely and longitudinally polarised photons. Initial and final state parton showers are tested as a mechanism for including higher order QCD effects in low E-T jet production.",

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doi = "10.1140/epjc/s2004-01989-7",

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T1 - Measurement of dijet production at low Q² at HERA

AU - Aktas, A

AU - Coppens, Yves

AU - Dowell, John

AU - Faulkner, Peter

AU - Fleming, Yves

AU - Garvey, John

AU - Henshaw, Oliver

AU - Johnson, Carrie

AU - Kenyon, Ian

AU - Newman, Paul

AU - Rizvi, Syed

AU - Thompson, Paul

AU - Woehrling, Ethan-Etienne

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Y1 - 2004/9/1

N2 - Triple differential dijet cross sections in e(+/-)p interactions are presented in the region of photon virtualities 2 7GeV, E*(T2) > 5 GeV, and pseudorapidities - 2.5 <η(1)*, η(2)* <0. The measurements are made in the gamma*p centre-of-mass frame, using an integrated luminosity of 57 pb(-1). The data are compared with NLO QCD calculations and LO Monte Carlo programs with and without a resolved virtual photon contribution. NLO QCD calculations fail to describe the region of low Q(2) and low jet transverse energies, in contrast to a LO Monte Carlo generator which includes direct and resolved photon interactions with both transversely and longitudinally polarised photons. Initial and final state parton showers are tested as a mechanism for including higher order QCD effects in low E-T jet production.

AB - Triple differential dijet cross sections in e(+/-)p interactions are presented in the region of photon virtualities 2 7GeV, E*(T2) > 5 GeV, and pseudorapidities - 2.5 <η(1)*, η(2)* <0. The measurements are made in the gamma*p centre-of-mass frame, using an integrated luminosity of 57 pb(-1). The data are compared with NLO QCD calculations and LO Monte Carlo programs with and without a resolved virtual photon contribution. NLO QCD calculations fail to describe the region of low Q(2) and low jet transverse energies, in contrast to a LO Monte Carlo generator which includes direct and resolved photon interactions with both transversely and longitudinally polarised photons. Initial and final state parton showers are tested as a mechanism for including higher order QCD effects in low E-T jet production.

U2 - 10.1140/epjc/s2004-01989-7

DO - 10.1140/epjc/s2004-01989-7

M3 - Article

VL - 37

SP - 141

JO - European Physical Journal C

JF - European Physical Journal C

IS - 2

ER -

Measurement of dijet production at low Q² at HERA

Abstract

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