Production of excited charm and charm-strange mesons at HERA
European Physical Journal C 60:1 (2009) 25-45
Abstract:
The production of excited charm, D 1(2420)0 and D 2* (2460)0, and charm-strange, D s1(2536)±, mesons in ep collisions was measured with the ZEUS detector at HERA using an integrated luminosity of 126 pb -1. Masses, widths and helicity parameters were determined. The measured yields were converted to the rates of c quarks hadronising as a given excited charm meson and to the ratios of the dominant D 2* (2460)0 and D s1(2536) ± branching fractions. A search for the radially excited charm meson, D *(2640)±, was also performed. The results are compared with those measured previously and with theoretical expectations. © 2009 Springer-Verlag / Società Italiana di Fisica.Search for events with an isolated lepton and missing transverse momentum and a measurement of W production at HERA
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 672:2 (2009) 106-115
Abstract:
A search for events with an isolated high-energy lepton and large missing transverse momentum has been performed with the ZEUS detector at HERA using a total integrated luminosity of 504 pb-1. The results agree well with Standard Model predictions. The cross section for production of single W bosons in electron-proton collisions with unpolarised electrons is measured to be 0.89-0.22+0.25 (stat.) ± 0.10 (syst.) pb. © 2009 Elsevier B.V.Proceedings of the 38th International Symposium on Multiparticle Dynamics (ISMD08)
(2009)
Have we seen anything beyond (N)NLO DGLAP at HERA?
(2009)
Measurement of high-Q^2 neutral current deep inelastic e^- p scattering cross sections with a longitudinally polarised electron beam at HERA
ArXiv 0901.2385 (2009)