Charm Fragmentation and Excited Charm Meson Production

Olaf Behnke
2011 Proceedings of 35th International Conference of High Energy Physics — PoS(ICHEP 2010)   unpublished
In the first part of the talk measurements were presented by H1 and ZEUS of the charm fragmentation into D * mesons at HERA, investigating the charm fragmentation function. Since these results were already presented at the EPS-HEP 2009 conference, the reader is referred to the corresponding proceedings [1]. In the remainder of this article we will focus completely on the second part of the talk, presenting a new ZEUS measurement [2] of the production of the excited charm mesons D 1 (2420) 0 and
more » ... D * 2 (2460) 0 in ep collisions. The masses, widths and helicity parameters of these resonances were determined and compared with previous measurements and theoretical expectations. The results can also be compared with new high precision measurements [3] by BABAR, which were presented at this conference. A good agreement between the ZEUS and BABAR results is observed.
doi:10.22323/1.120.0139 fatcat:ruiqefqegzggbgb27j5e644wla