Unintegrated parton distributions of pions and nucleons from the CCFM equations in the single-loop approximation

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dc.creatorGawron, Agnieszka
dc.creatorKwiecinski, Jan
dc.creatorBroniowski, Wojciech
dc.date2003-05-20
dc.date.accessioned2026-07-07T11:47:37Z
dc.date.available2026-07-07T11:47:37Z
dc.descriptionThe unintegrated quark and gluon distributions in the pion and nucleon are analysed using the CCFM equations in the single-loop approximation. We utilise the transverse-coordinate (or impact-parameter) representation which diagonalises the equations and study in detail the dependence on the transverse coordinate induced by the CCFM evolution. We find considerable broadening of the transverse-momentum distributions with an increasing magnitude of the hard scale, Q. For instance, at the Bjorken x=0.1 the root mean squared transverse momentum of the gluons is enhanced by about 1 GeV when evolved from the the initial low scale to Q^2=10 GeV^2, and by about 2 GeV when evolved up to Q^2=100 GeV^2. The broadening effect is enhanced with decreasing Bjorken x, and is stronger for the gluons than for the quarks. Analytic solution for the average transverse momentum corresponding to the x-moments of the distributions is obtained. The parton luminosities are also discussed.
dc.identifierhttps://arxiv.org/abs/hep-ph/0305219
dc.identifierhttp://arxiv.org/abs/hep-ph/0305219
dc.identifierPhys.Rev.D68:054001,2003
dc.identifierdoi:10.1103/PhysRevD.68.054001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202633
dc.subjectHigh Energy Physics - Phenomenology
dc.titleUnintegrated parton distributions of pions and nucleons from the CCFM equations in the single-loop approximation
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