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Akademický článek
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Autor:
The Small x Collaboration, Andersen, J., Baranov, S., Collins, J., Dokshitzer, Y., Goerlich, L., Grindhammer, G., Gustafson, G., Jonsson, L., Jung, H., Kwiecinski, J., Levin, E., Lipatov, A., Lonnblad, L., Lublinsky, M., Maul, M., Milcewicz, I., Miu, G., Nowak, G., Sjostrand, T., Stasto, A., Timneanu, N., Turnau, J., Zotov, N.
Publikováno v:
Eur.Phys.J.C35:67-98,2004
A second workshop on small x physics, within the Small x Collaboration, was held in Lund in June 2002 with the aim of over-viewing recent theoretical progress in this area and summarizing the experimental status. This paper is dedicated to the memory
Externí odkaz:
http://arxiv.org/abs/hep-ph/0312333
Autor:
Kwiecinski, J., Szczurek, A.
Publikováno v:
Nucl.Phys. B680 (2004) 164-176
Transverse momentum distribution of gauge bosons $W^{\pm}$ and $Z^0$ is calculated using unintegrated parton distributions obtained by solving leading order CCFM equation(s) in the impact parameter space. For illustration we compare the results of th
Externí odkaz:
http://arxiv.org/abs/hep-ph/0311290
Unintegrated gluon distributions in a photon from the CCFM equation in the single loop approximation
Autor:
Gawron, A., Kwiecinski, J.
Publikováno v:
Acta Phys.Polon.B34:133-148,2003
The system of CCFM equations for unintegrated parton distributions in a photon is considered in the single loop approximation. We include quarks and non-singular parts of the splitting functions in the corresponding evolution equations. We solve the
Externí odkaz:
http://arxiv.org/abs/hep-ph/0207299
Publikováno v:
Acta Phys.Polon.B33:1559-1570,2002
A saturation model for the total gamma-gamma and gamma*-gamma* cross-sections and for the real photon structure function F_2^gamma(x,Q^2) is described. The model is based on a QCD dipole picture of high energy scattering. The two-dipole cross-section
Externí odkaz:
http://arxiv.org/abs/hep-ph/0206129
Publikováno v:
Acta Phys.Polon. B33 (2002) 3045-3050
We introduce a saturation model for photon-photon interactions, based on a QCD dipole picture of high energy scattering. The two-dipole cross-section is assumed to satisfy the saturation property. This pomeron-like contribution is supplemented with Q
Externí odkaz:
http://arxiv.org/abs/hep-ph/0206130
Autor:
The Small x Collaboration, Andersson, Bo, Baranov, S., Bartels, J., Ciafaloni, M., Collins, J., Davidsson, M., Gustafson, G., Jung, H., Joensson, L., Karlsson, M., Kimber, M., Kotikov, A., Kwiecinski, J., Loennblad, L., Miu, G., Salam, G., Seymour, M. H., Sjoestrand, T., Zotov, N.
Publikováno v:
Eur.Phys.J.C25:77-101,2002
The aim of this paper is to summarize the general status of our understanding of small x physics. It is based on presentations and discussions at an informal meeting on this topic held in Lund, Sweden, in March 2001. This document also marks the foun
Externí odkaz:
http://arxiv.org/abs/hep-ph/0204115
Autor:
Kwiecinski, J.
Publikováno v:
Acta Phys.Polon. B33 (2002) 1809-1822
We utilise the fact that the CCFM equation in the single loop approximation can be diagonalised by the Fourier-Bessel transform. The analytic solution of the CCFM equation for the moments $f_{\omega}(b,Q)$ of the scale dependent gluon distribution is
Externí odkaz:
http://arxiv.org/abs/hep-ph/0203172
Autor:
Kwiecinski, J., Stasto, A. M.
Publikováno v:
Phys.Rev.D66:014013,2002
We study the impact of the QCD DGLAP evolution on the geometric scaling of the gluon distributions which is expected to hold at small x within the saturation models. To this aim we solve the DGLAP evolution equations with the initial conditions provi
Externí odkaz:
http://arxiv.org/abs/hep-ph/0203030