Title of article
Scale influence on the energy dependence of photon-proton cross sections
Author/Authors
Q2) Original Research Article Pages 471-502 H1 Collaboration، نويسنده , , S Aid، نويسنده , , M Anderson، نويسنده , , V Andreev، نويسنده , , B Andrieu، نويسنده , , A Babaev، نويسنده , , J B?hr، نويسنده , , J B?n، نويسنده , , Y Ban، نويسنده , , P Baranov، نويسنده , , E Barrelet، نويسنده , , R. Barschke، نويسنده , , W Bartel، نويسنده , , M Barth، نويسنده , , U Bassler، نويسنده , , H.P. Beck، نويسنده , , M Beck، نويسنده , , H.-J Behrend، نويسنده , , A Belousov، نويسنده , , Ch. Berger، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1996
Pages
9
From page
234
To page
242
Abstract
The scale dependence of the evolution of photoproduction cross sections with the photon-proton centre of mass energy W is studied using low Q2 < 0.01 GeV2 e+p interactions collected by the H1 experiment at HERA. The value of the largest transverse momentum of a charged particle in the photon fragmentation region is used to define the hard scale. The slope of the W dependence of the cross section is observed to increase steeply with increasing transverse momentum. The result is compared to measurements of the Q2 evolution of the W dependence of the virtual photon-proton cross section. Interpretations in terms of QCD and in terms of Regge phenomenology are discussed.
Journal title
PHYSICS LETTERS B
Serial Year
1996
Journal title
PHYSICS LETTERS B
Record number
907747
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