INVESTIGADORES
SASSOT Rodolfo
congresos y reuniones científicas
Título:
Medium modified fragmentation functions and nPDF
Autor/es:
RODOLFO SASSOT; MARCO STRATMANN; PIA ZURITA
Lugar:
Brookhaven National Laboratory, New York
Reunión:
Workshop; Progress in high p_T physics; 2010
Institución organizadora:
RIKEN-BNL
Resumen:
We perform a detailed phenomenological analysis of how well hadronization in nuclear environments
can be described in terms of effective fragmentation functions.
The medium modified fragmentation functions are assumed to factorize from the
partonic scattering cross sections and evolve in the
hard scale in the same way as the standard or vacuum fragmentation functions.
Based on precise data on semi-inclusive deep-inelastic scattering off nuclei
and hadron production in deuteron-gold collisions, we extract
sets of effective fragmentation functions for pions and kaons at NLO accuracy.
The obtained sets provide a rather accurate description of the kinematical dependence
of the analyzed cross sections and are found to differ
significantly from standard fragmentation functions both in shape and magnitude.
Our results support the notion of factorization and universality in the studied nuclear
environments, at least in an effective way and within the precision of the available data.