From QCD color coherence to inclusive hadronic distributions at colliders

by Redamy Perez (University of Valencia)

Thursday 11 Nov 2010, 15:00 → 16:00 Europe/Zurich

IT Auditorium (CERN)

Abstract: The transverse momentum (kt) distribution and the two-particle correlations inside gluon and quark jets produced at high energy colliders, are computed within the NLO Modified Leading Logarithmic Approximation (MLLA) at small energy fraction of the outgoing partons. Next-to-MLLA corrections which better account for energy conservation at each step of the cascading process has been incorporated, such that the agreement of our predictions for kt-distributions with CDF data is very good as compared with MLLA. The two-particle correlations are obtained from the exact solution of QCD evolution equations and the agreement with the OPAL data was improved as compared with previous approaches. In both cases, the role of hadronization is modelled from Local Parton-Hadron Duality (LPHD) hypothesis, signaling better agreement with the data in the case of less inclusive observables. The internal structure of jets and QCD color coherence leading to QCD evolution equations will be discussed in the seminar. Finally, inclusive hadronic observables are potential candidates to be measured and tested in hard processes at the LHC.

Poster HIF_11.11.2010.pdf