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

Redamy Perez Ramos (1)

1 II. Institut für Theoretische Physik [Hamburg]

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.

Mots clés: Jets; QCD; MLLA

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]

Redamy Perez Ramos. Inclusive hadronic distributions in jets and sub-jets with jet axis from color current. 2008. ⟨hal-00342610⟩