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arXiv · 0807.1290

Production of excited charm and charm-strange mesons at HERA

ZEUS Collaboration
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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.

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ZEUS Collaboration. 2009-03-19. Production of excited charm and charm-strange mesons at HERA. https://doi.org/10.1140/epjc%2Fs10052-009-0881-x

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