Speaker
Ms
Nour Makke
(CEA/Saclay)
Description
Fragmentation functions (FF) describe the process of fragmentation of quarks into hadrons. They are needed for the determination of polarized and unpolarized quark distribution functions from semi-inclusive deep inelastic scattering (SIDIS) data. While the pion FFs are reasonably well determined, kaon FFs are poorly known and provide the largest source of uncertainty for the extraction of the polarized strange quark distribution function.
FFs are non-perturbative quantities which were first determined from high energy e+e- data. The COMPASS collaboration has recently measured pion and kaon multiplicities in SIDIS. These data can be used as input to global QCD analyses to determine FFs. The current status of the leading order extraction of the fragmentation functions from SIDS data collected by the COMPASS experiment will be presented.
Primary author
Ms
Nour Makke
(CEA/Saclay)