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Specific features of heavy quark production: local parton-hadron duality approach to heavy particle spectra

Perturbative QCD formula for inclusive energy spectra of heavy quarks from heavy quark initiated jets which takes into account collinear and/or soft logarithms in all orders, the exact first order result and two-loop effects is applied to distributions of heavy flavoured hadrons in the framework of...

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Detalles Bibliográficos
Autores principales: Dokshitzer, Yu L, Khoze, V A, Troyan, S I
Lenguaje:eng
Publicado: 1995
Materias:
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.53.89
http://cds.cern.ch/record/283900
Descripción
Sumario:Perturbative QCD formula for inclusive energy spectra of heavy quarks from heavy quark initiated jets which takes into account collinear and/or soft logarithms in all orders, the exact first order result and two-loop effects is applied to distributions of heavy flavoured hadrons in the framework of the LPHD concept. Fits to experimentally measured charm and bottom mean energy losses result in \alpha_{\MSbar}(M_Z)=0.125\pm 0.003\pm 0.004 and (2\GeV)^{-1}\int_0^{2\GeV} dk \alpha_s^{eff}(k)= 0.18\pm 0.01\pm 0.02 with \alpha_s^{eff} an infrared finite effective QCD coupling.