Title
Measurement of event shape variables in deep-inelastic scattering at HERA
Date Issued
01 January 2006
Access level
open access
Resource Type
journal article
Author(s)
Aktas A.
Andreev V.
Anthonis T.
Antunovic B.
Aplin S.
Asmone A.
Astvatsatourov A.
Babaev A.
Backovic S.
Bähr J.
Baghdasaryan A.
Baranov P.
Barrelet E.
Bartel W.
Baudrand S.
Baumgartner S.
Becker J.
Beckingham M.
Behnke O.
Behrendt O.
Belousov A.
Berger C.
Berger N.
Bizot J.C.
Boenig M.O.
Boudry V.
Bracinik J.
Brandt G.
Brisson V.
Bruncko D.
Büsser F.W.
Bunyatyan A.
Buschhorn G.
Bystritskaya L.
Campbell A.J.
Cassol-Brunner F.
Cerny K.
Cerny V.
Chekelian V.
Contreras J.G.
Coughlan J.A.
Cox B.E.
Cozzika G.
Cvach J.
Dainton J.B.
Dau W.D.
Daum K.
de Boer Y.
Delcourt B.
Del Degan M.
de Roeck A.
Desch K.
de Wolf E.A.
Diaconu C.
Dodonov V.
Dubak A.
Eckerlin G.
Efremenko V.
Egli S.
Eichler R.
Eisele F.
Elsen E.
Erdmann W.
Essenov S.
Falkewicz A.
Faulkner P.J.W.
Favart L.
Fedotov A.
Felst R.
Feltesse J.
Ferencei J.
Finke L.
Fleischer M.
Fleischmann P.
Flucke G.
Fomenko A.
Foresti I.
Franke G.
Frisson T.
Gabathuler E.
Garutti E.
Gayler J.
Gerlich C.
Ghazaryan S.
Ginzburgskaya S.
Glazov A.
Glushkov I.
Goerlich L.
Goettlich M.
Gogitidze N.
Gorbounov S.
Goyon C.
Grab C.
Greenshaw T.
Gregori M.
Grell B.R.
Grindhammer G.
Gwilliam C.
Haidt D.
Hajduk L.
Publisher(s)
Springer New York LLC
Abstract
Deep-inelastic ep scattering data taken with the HI detector at HERA and corresponding to an integrated luminosity of 106 pb-1 are used to study the differential distributions of event shape variables. These include thrust, jet broadening, jet mass and the C-parameter. The four-momentum transfer Q is taken to be the relevant energy scale and ranges between 14 GeV and 200 GeV. The event shape distributions are compared with perturbative QCD predictions, which include resummed contributions and analytical power law corrections, the latter accounting for non-perturbative hadronisation effects. The data clearly exhibit the running of the strong coupling α s(Q) and are consistent with a universal power correction parameter α0 for all event shape variables. A combined QCD fit using all event shape variables yields αs(mZ) = 0.1198 ± 0.0013 -0.0043+0.0056 and α0 = 0.476 ± 0.008 -0.059+0.018.
Start page
343
End page
356
Volume
46
Issue
2
Language
English
OCDE Knowledge area
Física de partículas, Campos de la Física
Física nuclear
Scopus EID
2-s2.0-33646131827
Source
European Physical Journal C
ISSN of the container
14346044
Sources of information:
Directorio de Producción Científica
Scopus