SINGLE INCLUSIVE DISTRIBUTION AND TWO-PARTICLE CORRELATIONS INSIDE ONE JET AT "MODIFIED LEADING LOGARITHMIC APPROXIMATION" OF QUANTUM CHROMODYNAMICS II : STEEPEST DESCENT EVALUATION AT SMALL X

Redamy Perez Ramos (1)

1 LPTHE - Laboratoire de Physique Théorique et Hautes Energies

The MLLA single inclusive distribution inside one high energy (gluon) jet at small x is estimated by the steepest descent method. Its analytical expression is obtained outside the "limiting spectrum". It is then used to evaluate 2-particle correlations at the same level of generality. The dependence of both observables on the ratio between the infrared cutoff Q_0 and Lambda_QCD is studied. Fong & Webber's results for correlations are recovered at the limits when this ratio goes to 1 and when one stays close to the peak of the single inclusive distribution.

Mots clés: Quantum Chromodynamics; jets

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

Redamy Perez Ramos. SINGLE INCLUSIVE DISTRIBUTION AND TWO-PARTICLE CORRELATIONS INSIDE ONE JET AT "MODIFIED LEADING LOGARITHMIC APPROXIMATION" OF QUANTUM CHROMODYNAMICS II : STEEPEST DESCENT EVALUATION AT SMALL X. Journal of High Energy Physics, 2006, 09, pp.014. ⟨hal-00086880⟩