Title
Measurement of dijet production at low Q 2 at HERA
Date Issued
01 December 2004
Access level
open access
Resource Type
journal article
Author(s)
Aktas A.
Andreev V.
Anthonis T.
Asmone A.
Babaev A.
Backovic S.
Bähr J.
Baranov P.
Barrelet E.
Bartel W.
Baumgartner S.
Becker J.
Beckingham M.
Behnke O.
Behrendt O.
Belousov A.
Berger C.
Berger N.
Berndt T.
Bizot J.C.
Böhme J.
Boenig M.O.
Boudry V.
Bracinik J.
Braunschweig W.
Brisson V.
Bröker H.B.
Brown D.P.
Bruncko D.
Büsser F.W.
Bunyatyan A.
Buschhorn G.
Bystritskaya L.
Campbell A.J.
Caron S.
Cassol-Brunner F.
Cerny K.
Chekelian V.
Chýla J.
Collard C.
Contreras J.G.
Coppens Y.R.
Coughlan J.A.
Cousinou M.C.
Cox B.E.
Cozzika G.
Cvach J.
Dainton J.B.
Dau W.D.
Daum K.
Delcourt B.
Delerue N.
Demirchyan R.
de Roeck A.
Desch K.
de Wolf E.A.
Diaconu C.
Dingfelder J.
Dodonov V.
Dowell J.D.
Dubak A.
Duprel C.
Eckerlin G.
Efremenko V.
Egli S.
Eichler R.
Eisele F.
Ellerbrock M.
Elsen E.
Erdmann M.
Erdmann W.
Faulkner P.J.W.
Favart L.
Fedotov A.
Felst R.
Ferencei J.
Fleischer M.
Fleischmann P.
Fleming Y.H.
Flucke G.
Flügge G.
Fomenko A.
Foresti I.
Formánek J.
Franke G.
Frising G.
Gabathuler E.
Gabathuler K.
Garvey J.
Gassner J.
Gayler J.
Gerhards R.
Gerlich C.
Ghazaryan S.
Goerlich L.
Gogitidze N.
Gorbounov S.
Grab C.
Grabski V.
Grässler H.
Abstract
Triple differential dijet cross sections in e ±p interactions are presented in the region of photon virtualities 2 < Q 2 < 80GeV 2, inelasticities 0.1 < y < 0.85, jet transverse energies E T 1* > 7GeV, E T 2* > 5GeV, and pseudorapidities -2.5 < η 1*, η 2* < 0. The measurements are made in the γ* 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. © Springer-Verlag / Società Italiana di Fisica 2004.
Start page
141
End page
159
Volume
37
Issue
2
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Física nuclear
Scopus EID
2-s2.0-17444390570
Source
European Physical Journal C
ISSN of the container
14346052
Sources of information:
Directorio de Producción Científica
Scopus