Geometric scaling and QCD dynamics in DIS
(2007) In Journal of High Energy Physics p.25-25- Abstract
- DIS data from HERA show a striking regularity as sigma(gamma*p) is a function of the ratio tau = Q(2)/Q(s)(2)(x) only. The scaling function shows a break at 7 t, which has been taken as an indication for saturation. However, besides saturation also the transition between dominance of k(perpendicular to)-ordered (DGLAP) and k(perpendicular to)-non-ordered (BFKL) evolution contributes to a break around this value of 7, as well as the suppression for small Q(2) due to finite quark masses and confinement. In this paper we use a dipole cascade model based on Mueller's dipole model, which also includes energy conservation and pomeron mergings, to investigate the contributions of these different effects to the scaling behaviour. As a result we... (More)
- DIS data from HERA show a striking regularity as sigma(gamma*p) is a function of the ratio tau = Q(2)/Q(s)(2)(x) only. The scaling function shows a break at 7 t, which has been taken as an indication for saturation. However, besides saturation also the transition between dominance of k(perpendicular to)-ordered (DGLAP) and k(perpendicular to)-non-ordered (BFKL) evolution contributes to a break around this value of 7, as well as the suppression for small Q(2) due to finite quark masses and confinement. In this paper we use a dipole cascade model based on Mueller's dipole model, which also includes energy conservation and pomeron mergings, to investigate the contributions of these different effects to the scaling behaviour. As a result we predict that the scaling function for tau < 1 will be modified when data for Q(2) > 1 GeV2 become available. We also investigate the scaling properties of the charm contribution and the impact parameter dependence of the saturation scale. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1416180
- author
- Avsar, Emil LU and Gustafson, Gösta LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- PROTON STRUCTURE, HIGH-ENERGY, BFKL POMERON, STATISTICAL PHYSICS, phenomenological models, PICTURE, EVOLUTION, UNITARITY, COHERENCE, SCATTERING, SMALL-X, deep inelastic scattering, QCD
- in
- Journal of High Energy Physics
- issue
- 4
- pages
- 25 - 25
- publisher
- Springer
- external identifiers
-
- wos:000246396400067
- scopus:34247885986
- ISSN
- 1029-8479
- DOI
- 10.1088/1126-6708/2007/04/067
- language
- English
- LU publication?
- yes
- id
- 987a6b03-4d94-4887-b568-aff685eaace8 (old id 1416180)
- date added to LUP
- 2016-04-01 12:38:39
- date last changed
- 2024-01-09 03:47:32
@article{987a6b03-4d94-4887-b568-aff685eaace8, abstract = {{DIS data from HERA show a striking regularity as sigma(gamma*p) is a function of the ratio tau = Q(2)/Q(s)(2)(x) only. The scaling function shows a break at 7 t, which has been taken as an indication for saturation. However, besides saturation also the transition between dominance of k(perpendicular to)-ordered (DGLAP) and k(perpendicular to)-non-ordered (BFKL) evolution contributes to a break around this value of 7, as well as the suppression for small Q(2) due to finite quark masses and confinement. In this paper we use a dipole cascade model based on Mueller's dipole model, which also includes energy conservation and pomeron mergings, to investigate the contributions of these different effects to the scaling behaviour. As a result we predict that the scaling function for tau < 1 will be modified when data for Q(2) > 1 GeV2 become available. We also investigate the scaling properties of the charm contribution and the impact parameter dependence of the saturation scale.}}, author = {{Avsar, Emil and Gustafson, Gösta}}, issn = {{1029-8479}}, keywords = {{PROTON STRUCTURE; HIGH-ENERGY; BFKL POMERON; STATISTICAL PHYSICS; phenomenological models; PICTURE; EVOLUTION; UNITARITY; COHERENCE; SCATTERING; SMALL-X; deep inelastic scattering; QCD}}, language = {{eng}}, number = {{4}}, pages = {{25--25}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{Geometric scaling and QCD dynamics in DIS}}, url = {{http://dx.doi.org/10.1088/1126-6708/2007/04/067}}, doi = {{10.1088/1126-6708/2007/04/067}}, year = {{2007}}, }