Title
Measurement of charm and beauty dijet cross sections in photoproduction at HERA using the H1 vertex detector
Date Issued
01 September 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.
Baghdasaryan A.
Baranov P.
Barrelet E.
Bartel W.
Baudrand S.
Baumgartner S.
Becker J.
Beckingham M.
Behnke O.
Behrendt O.
Belousov A.
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.
de Wolf E.A.
Diaconu C.
Dodonov V.
Dubak A.
Eckerlin G.
Efremenko V.
Egli S.
Eichler R.
Eisele F.
Eliseev A.
Elsen E.
Essenov S.
Falkewicz A.
Faulkner P.J.W.
Favart L.
Fedotov A.
Felst R.
Feltesse J.
Ferencei J.
Finke L.
Fleischer M.
Flucke G.
Fomenko A.
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.
Grab C.
Greenshaw T.
Gregori M.
Grell B.R.
Grindhammer G.
Gwilliam C.
Haidt D.
Hajduk L.
Hansson M.
Heinzelmann G.
Henderson R.C.W.
Henschel H.
Herrera G.
Hildebrandt M.
Abstract
A measurement of charm and beauty dijet photoproduction cross sections at the ep collider HERA is presented. Events are selected with two or more jets of transverse momentum ptjet1(2) > 11(8) GeV in the central range of pseudo-rapidity -0.9 < ηjet1(2) < 1.3. The fractions of events containing charm and beauty quarks are determined using a method based on the impact parameter, in the transverse plane, of tracks to the primary vertex, as measured by the HI central vertex detector. Differential dijet cross sections for charm and beauty, and their relative contributions to the flavour inclusive dijet photoproduction cross section, are measured as a function of the transverse momentum of the leading jet, the average pseudo-rapidity of the two jets and the observable xγobs. Taking into account the theoretical uncertainties, the charm cross sections are consistent with a QCD calculation in next-to-leading order, while the predicted cross sections for beauty production are somewhat lower than the measurement.
Start page
597
End page
610
Volume
47
Issue
3
Language
English
OCDE Knowledge area
Física nuclear
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-33748302070
Source
European Physical Journal C
ISSN of the container
14346052
Sponsor(s)
Science and Technology Facilities Council - PP/E000444/1.
Sources of information:
Directorio de Producción Científica
Scopus