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Dijet cross sections and parton densities in diffractive DIS at HERA

Aktas, A., Alexa, C., Andreev, V., Anthonis, T., Antunovic, B., Aplin, S., Asmone, A., Astvatsatourov, A., Backovic, S., Baghdasaryan, A., Baranov, P., Barrelet, E., Bartel, W., Baudrand, S., Beckingham, M., Begzsuren, K., Berger, N., Li, G. and H1 Collaboration 2007, Dijet cross sections and parton densities in diffractive DIS at HERA, Journal of high energy physics, vol. 2007, no. 10, doi: 10.1088/1126-6708/2007/10/042.

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Title Dijet cross sections and parton densities in diffractive DIS at HERA
Author(s) Aktas, A.
Alexa, C.
Andreev, V.
Anthonis, T.
Antunovic, B.
Aplin, S.
Asmone, A.
Astvatsatourov, A.
Backovic, S.
Baghdasaryan, A.
Baranov, P.
Barrelet, E.
Bartel, W.
Baudrand, S.
Beckingham, M.
Begzsuren, K.
Berger, N.
Li, G.ORCID iD for Li, G. orcid.org/0000-0003-1583-641X
H1 Collaboration
Journal name Journal of high energy physics
Volume number 2007
Issue number 10
Total pages 33
Publisher IOP Press
Place of publication Bologna, Italy
Publication date 2007-10
ISSN 1126-6708
1029-8479
Summary Differential dijet cross sections in diffractive deep-inelastic scattering are measured with the H1 detector at HERA using an integrated luminosity of 51.5 pb-1. The selected events are of the type ep → eXY , where the system X contains at least two jets and is well separated in rapidity from the low mass proton dissociation system Y. The dijet data are compared with QCD predictions at next-to-leading order based on diffractive parton distribution functions previously extracted from measurements of inclusive diffractive deep-inelastic scattering. The prediction describes the dijet data well at low and intermediate zℙ (the fraction of the momentum of the diffractive exchange carried by the parton entering the hard interaction) where the gluon density is well determined from the inclusive diffractive data, supporting QCD factorisation. A new set of diffractive parton distribution functions is obtained through a simultaneous fit to the diffractive inclusive and dijet cross sections. This allows for a precise determination of both the diffractive quark and gluon distributions in the range 0.05 < zℙ < 0.9. In particular, the precision on the gluon density at high momentum fractions is improved compared to previous extractions. © SISSA 2007.
Language eng
DOI 10.1088/1126-6708/2007/10/042
Indigenous content off
Field of Research 01 Mathematical Sciences
02 Physical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2007, SISSA
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30125991

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.