Production of excited charm and charm-strange mesons at HERA

Sergei V. Chekanov, Malcolm Derrick, S. Magill, Brian Musgrave, D. Nicholass, J. Repond, R. Yoshida, M.C.K. Mattingly, P. Antonioli, Giacomo Bari

90 more authors

L. Bellagamba, D. Boscherini, A. Bruni, G. Bruni, F. Cindolo, M. Corradi, GIUSEPPE IACOBUCCI, A. Margotti, R. Nania, Alessandro Polini, S. Antonelli, M. Basile, M. Bindi, L. Cifarelli, A. Contin, S. De Pasquale, G. Sartorelli, ANTONINO ZICHICHI, D. Bartsch, Ian C. Brock, H. Hartmann, E. Hilger, H.‐P. Jakob, M. Jüngst, A.-E. Nuncio-Quiroz, E. Paul, U. Samson, V. Schönberg, R. Shehzadi, M. Wlasenko, Nicholas H Brook, G. P. Heath, J. D. Morris, M. Capua, Salvatore Fazio, Anna Mastroberardino, Marco Schioppa, G. F. Susinno, E. ̃Tassi, J.Y. Kim, Z. A. Ibrahim, Burhanuddin Kamaluddin, W. A. T. Wan Abdullah, Y. Ning, Z. Ren, Frank J. Sciulli, J. J. Chwastowski, A. Eskreys, J. Figiel, A. Galas, M. Gil, Krystyna Olkiewicz, P. Stopa, L. Zawiejski, L. Adamczyk, T. Bołd, I. Grabowska-Bołd, Danuta Kisielewska, J. Łukasik, M. Przybycień, L. Suszycki, Andrzej Kotański, W. Słomiński, U. Behrens, C. Blohm, Anthony Bonato, K. Borras, R. Ciesielski, N. Coppola, S. Fang, J. Fourletova, A. Geiser, P. Göttlicher, J. Grebenyuk, I. M. Gregor, T. Haas, W. Hain, A. Hüttmann, F. Januschek, B. Kahle, I.I. Katkov, U. Klein, U. Kötz, H. Kowalski, E. M. Lobodzinska, Bernd Löhr, R. Mankel, I.-A. Melzer-Pellmann, S. Miglioranzi, A. Montanari

2009

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DOI 10.1140/epjc/s10052-009-0881-x
Data confidence 70 medium
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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.