Inclusive hadronic distributions in jets and sub-jets with jet axis from color current

Details Inclusive hadronic distributions in jets and sub-jets with jet axis from color current Inclusive hadronic distributions in jets and sub-jets with jet axis from color current

2008-11-27

arxiv.org/abs/0811.4619v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

Invited lecture at Ringberg Workshop: New Trends in HERA Physics 2008, October 5-10, 2008, Ringberg Castle, Tegernsee-Bavaria,

Scientific paper

The hadronic $\kt$-spectrum and the gluon to quark average multiplicity ratio $r=N_g/N_q$ inside a high energy sub-jet are determined from a precise definition of the jet axis, including corrections of relative magnitude ${\cal O}(\sqrt{\alpha_s})$ with respect to the Modified Leading Logarithmic Approximation (MLLA), in the limiting spectrum approximation (assuming an infrared cut-off $Q_0 =\lqcd$). The results for the $\kt$-spectrum in the limiting spectrum approximation are found to be, after normalization, in impressive agreement with measurements by the CDF collaboration and the ratio has not been measured yet.

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