Charm fragmentation and excited charm and charm-strange mesons at ZEUS
نویسنده
چکیده
Charm hadrons were produced copiously in ep collisions with a centre-of-mass energy of 318GeV at HERA providing a means to study charm hadronisation. During first phase of the HERA operation (1992-2000), the ZEUS collaboration accumulated data sample corresponding to an integrated luminosity of ∼ 120 pb. Measurements of the D, D, D and Λc production a with the HERA I data were used to determine charm fragmentation ratios and fractions of c quarks hadronising as a particular charm hadron, f(c → D,Λc), in earlier ZEUS studies [2, 3]. Recent ZEUS measurements of the charm fragmentation function [4] and the production of excited charm and charm-strange mesons [5] are summarised in this note.
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تاریخ انتشار 2009