Regular Article - Experimental Physics
Study of jet fragmentation in p+p collisions at 200 GeV in the STAR experiment
Physics Department, Yale University, 272 Whitney Avenue, New Haven, CT, 06520, USA
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Published online: 24 February 2009
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 is a goal both in p+p and Au+Au collisions at RHIC. Studying fragmentation functions for identified particles is interesting in p+p by itself because it provides a test of NLO calculations at RHIC energies. We present a systematic comparison of jet energy spectra and fragment distributions using different jet-finding algorithms in p+p collisions in STAR. Fragmentation functions of charged and neutral strange particles are also reported for different jet energies.
PACS: 25.75.-q – / 21.65.Qr – / 24.85.+p – / 25.75.Bh –
© Springer-Verlag , 2009