Three- and Four-jet Final States in Photoproduction at HERA

ZEUS Collaboration

doi:10.1016/j.nuclphysb.2007.08.021

Three- and Four-jet Final States in Photoproduction at HERA

ZEUS Collaboration

Department of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Three- and four-jet final states have been measured in photoproduction at HERA using the ZEUS detector with an integrated luminosity of 121 pb -1. The results are presented for jets with transverse energy E Tjet > 6 GeV and pseudorapidity | η jet | < 2.4, in the kinematic region given by the virtuality of the photon Q 2 < 1 GeV 2 and the inelasticity 0.2 ≤ y ≤ 0.85 and in two mass regions defined as 25 ≤ M n j < 50 GeV and M n j ≥ 50 GeV, where M n j is the invariant mass of the n-jet system. The four-jet photoproduction cross section has been measured for the first time and represents the highest-order process studied at HERA. Both the three- and four-jet cross sections have been compared with leading-logarithmic parton-shower Monte Carlo models, with and without multi-parton interactions. The three-jet cross sections have been compared to an O (α α s2) perturbative QCD calculation.

Original language	American English
Pages (from-to)	1-47
Journal	Nuclear Physics B
Volume	792
Issue number	1-2
DOIs	https://doi.org/10.1016/j.nuclphysb.2007.08.021
State	Published - Mar 21 2008

Keywords

Jets
Multi-parton interactions
Photoproduction
QCD

Disciplines

Nuclear

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Three- and Four-jet Final States in Photoproduction at HERAFinal published version, 495 KBLicense: Unspecified

Cite this

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title = "Three- and Four-jet Final States in Photoproduction at HERA",

abstract = "Three- and four-jet final states have been measured in photoproduction at HERA using the ZEUS detector with an integrated luminosity of 121 pb -1. The results are presented for jets with transverse energy E Tjet > 6 GeV and pseudorapidity | η jet | < 2.4, in the kinematic region given by the virtuality of the photon Q 2 < 1 GeV 2 and the inelasticity 0.2 ≤ y ≤ 0.85 and in two mass regions defined as 25 ≤ M n j < 50 GeV and M n j ≥ 50 GeV, where M n j is the invariant mass of the n-jet system. The four-jet photoproduction cross section has been measured for the first time and represents the highest-order process studied at HERA. Both the three- and four-jet cross sections have been compared with leading-logarithmic parton-shower Monte Carlo models, with and without multi-parton interactions. The three-jet cross sections have been compared to an O (α α s2) perturbative QCD calculation. ",

keywords = "Jets, Multi-parton interactions, Photoproduction, QCD",

author = "\{ZEUS Collaboration\} and Mattingly, \{Margarita C. K.\}",

year = "2008",

month = mar,

day = "21",

doi = "10.1016/j.nuclphysb.2007.08.021",

language = "American English",

volume = "792",

pages = "1--47",

journal = "Nuclear Physics B",

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TY - JOUR

T1 - Three- and Four-jet Final States in Photoproduction at HERA

AU - ZEUS Collaboration

AU - Mattingly, Margarita C. K.

PY - 2008/3/21

Y1 - 2008/3/21

N2 - Three- and four-jet final states have been measured in photoproduction at HERA using the ZEUS detector with an integrated luminosity of 121 pb -1. The results are presented for jets with transverse energy E Tjet > 6 GeV and pseudorapidity | η jet | < 2.4, in the kinematic region given by the virtuality of the photon Q 2 < 1 GeV 2 and the inelasticity 0.2 ≤ y ≤ 0.85 and in two mass regions defined as 25 ≤ M n j < 50 GeV and M n j ≥ 50 GeV, where M n j is the invariant mass of the n-jet system. The four-jet photoproduction cross section has been measured for the first time and represents the highest-order process studied at HERA. Both the three- and four-jet cross sections have been compared with leading-logarithmic parton-shower Monte Carlo models, with and without multi-parton interactions. The three-jet cross sections have been compared to an O (α α s2) perturbative QCD calculation.

AB - Three- and four-jet final states have been measured in photoproduction at HERA using the ZEUS detector with an integrated luminosity of 121 pb -1. The results are presented for jets with transverse energy E Tjet > 6 GeV and pseudorapidity | η jet | < 2.4, in the kinematic region given by the virtuality of the photon Q 2 < 1 GeV 2 and the inelasticity 0.2 ≤ y ≤ 0.85 and in two mass regions defined as 25 ≤ M n j < 50 GeV and M n j ≥ 50 GeV, where M n j is the invariant mass of the n-jet system. The four-jet photoproduction cross section has been measured for the first time and represents the highest-order process studied at HERA. Both the three- and four-jet cross sections have been compared with leading-logarithmic parton-shower Monte Carlo models, with and without multi-parton interactions. The three-jet cross sections have been compared to an O (α α s2) perturbative QCD calculation.

KW - Jets

KW - Multi-parton interactions

KW - Photoproduction

KW - QCD

UR - https://digitalcommons.andrews.edu/pubs/1975

U2 - 10.1016/j.nuclphysb.2007.08.021

DO - 10.1016/j.nuclphysb.2007.08.021

M3 - Article

VL - 792

SP - 1

EP - 47

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 1-2

ER -

Three- and Four-jet Final States in Photoproduction at HERA

Abstract

Keywords

Disciplines

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