Abstract: Study of jet fragmentation in p+p collisions at 200 GeV in the STAR experiment. E. Bruna (for the STAR Collaboration)
The measurement of jet fragmentation functions in p+p collisions at 200 GeV is of great interest
because it provides a baseline to study jet
quenching in heavy-ion collisions.
It is expected that jet quenching in nuclear matter modifies the jet energy and
multiplicity distributions, as well as the jet hadrochemical composition. Therefore, a systematic study of
the fragmentation functions for charged hadrons and identified particles
inside jets is a goal both in p+p and Au+Au collisions at RHIC.
We present distributions of jet fragments in p+p collisions in STAR for
different jet opening angles and energies, using a cone algorithm for
the jet reconstruction. We also compare the results with the MLLA
(modified leading logarithmic approximation) formalism
which is known to provide a good description of fragmentation functions in e+e-
and ppbar collisions at higher energies.