Vector meson fragmentation using a model with broken SU(3) at the next-to-leading order
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Publication:5411379
DOI10.1142/S0217751X14500493zbMATH Open1284.81301arXiv1309.2134OpenAlexW1979259285MaRDI QIDQ5411379
Subhadip Mitra, H. Saveetha, D. Indumathi
Publication date: 23 April 2014
Published in: International Journal of Modern Physics A (Search for Journal in Brave)
Abstract: A detailed study of fragmentation of vector mesons at the next-to-leading order (NLO) is given for e^+ e^- scattering. A model with broken SU(3) symmetry uses three input fragmentation functions alpha(x, Q^2), �eta(x,Q^2) and gamma(x,Q^2) and a strangeness suppression parameter lambda to describe all the light quark fragmentation functions for the entire vector meson octet. At a starting low energy scale of Q_0^2 = 1.5 GeV^2 for three light quarks (u, d, s) along with initial parameterization, the fragmentation functions are evolved through DGLAP evolution equations at NLO and the cross-section is calculated. The heavy quarks contribution are added in appropriate thresholds during evolution. The results obtained are fitted at the momentum scale of sqrt{s}= 91.2 GeV for LEP and SLD data. Good-quality fits are obtained for
ho, K^*, omega and phi mesons, implying the consistency and efficiency of this model that explains the fragmentation functions of vector mesons both at the leading and the next to leading order in QCD. Keywords: vector meson, fragmentation, SU(3) symmetry, NLO .
Full work available at URL: https://arxiv.org/abs/1309.2134
Strong interaction, including quantum chromodynamics (81V05) Finite-dimensional groups and algebras motivated by physics and their representations (81R05)
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