Production of excited charm and charm-strange mesons at HERA

S Chekanov,M Turcato,W Hain,T Y Ling,D Szuba,J Fourletova,T Tymieniecka,E Hilger,B A Dolgoshein,B Musgrave,L Bellagamba,V Drugakov,K Olkiewicz,C Youngman,P G Pelfer,M Derrick,D Gladkov,J Szuba,W B Schmidke,L S Durkin,A Bertolin,D Boscherini,A Bruni,A M Cooper-Sarkar,C Uribe-Estrada,R Yoshida,B Kamaluddin,T Danielson,D Kçira,A Polini,T Theedt,B Foster,W A T Wan Abdullah,U Noor,A Longhin,M Adamus,U Schneekloth,R Walczak,B B Levchenko,K Oliver,G Sartorelli,P Göttlicher,S Menary,F Januschek,T Matsumoto,W Słomiński,S Antonelli,P Kulinski,A Bamberger,E Ron,M Rosin,A Everett,P Łużniak,S De Pasquale,S Schlenstedt,K Papageorgiu,A Galas,K Wrona,N Brümmer,L K Gladilin,R Brugnera,H Hartmann,B Reisert,T Namsoo,P Stopa,J Whyte,I A Korzhavina,G Grigorescu,D H Saxon,J Ciborowski,S Fourletov,R Hamatsu,M Kuze,A Ukleja,D Nicholass,L Labarga,O Volynets,I O Skillicorn,E Lohrmann,L Zawiejski,S Fazio,J Sztuk,S Dusini,A Parenti,S Limentani,S Kananov,M Wlasenko,L Suszycki,R Ingbir,O Ota,M Przybycień,R Santamarta,E Brownson,S Magill,Y Eisenberg,V Aushev,A T Doyle,M Jüngst,Yu A Golubkov,I Abt,A N Barakbaev,T Tsurugai,F Karstens,Iu Sorokin,C Blohm,V Schönberg,R J Nowak,A Garfagnini,A Kozulia,U Holm,H Wolfe,A Eskreys,J De Favereau,H Kowalski,A Stifutkin,R K Dementiev,S Bhadra,N Okazaki,L Wiggers,M Basile,J Grebenyuk,I Gialas,I Rubinsky,V Monaco,J Łukasik,M Zambrana,B Kahle,U Kötz,O Bachynska,A E Nuncio-Quiroz,N H Brook,G Marini,G Grzelak,R Hori,P Ryan,A Kotański,A Raval,J Ukleja,Y Iga,D Notz,K Korcsak-Gorzo,U Samson,J M Pawlak,A Keramidas,G Bari,J Standage,A Hüttmann,U Karshon,D Hochman,P Bellan,A Nigro,J Malka,B Löhr,B Brzozowska,V A Kuzmin,F Barreiro,B.y Oh ,F Corriveau,P Antonioli,I Makarenko,S Yamada,A Mastroberardino,C Gwenlan,A Zichichi,N S Pokrovskiy,M Arneodo,A.s Proskuryakov ,A I Robertson ,L.m Shcheglova ,E Lobodzinska,R Mankel,E Gallo,I M Gregor ,A Margotti,J Del Peso ,E Paul,T Bołd,E.g Boos ,J Ferrando,Yanou Cui ,H.‐P Jakob ,C Foudas,H F Heath ,D C Son ,A Verbytskyi,M Schioppa,D Bartsch,J Maeda,G Susinno,A Levy,T Schörner-Sadenius,M S Soares ,C D Catterall,M Ruspa,J E Cole,A Pellegrino,M Wing,T Tawara,A.g Yagües Molina ,G Barbagli,A F Żarnecki,S Boutle ,A Savin ,D Dobur,I.-A Melzer-Pellmann,D Reeder ,A Tapper ,R Nania,M Bindi,J Schwartz,F Cindolo,J Y Kim,A Stern,M A Bell,G D’Agostini,C Zhou,A Contin,M Capua,H Stadie,S Kitamura,K Piotrzkowski,O Yu Lukina,I Brock,U Klein,T Haas,M Forrest,V Sosnovtsev,E Tassi,А Антонов ,J J Chwastowski ,U Behrens,T P Stewart,J Repond,I Katkov ,P Pluciński ,M I Ferrero,J Terrón,J H Loizides,J C Hart,E Koffeman,L Rinaldi,J Figiel,L Stančo ,K Long ,J D Morris,Chuanlei Liu ,Z A Ibrahim,J F Martin,А Спиридонов ,R Klanner,G Wolf,H Abramowicz,L Cifarelli,H Tiecke,W H Smith,Y.d Ri ,A Bonato,B Bylsma,C Glasman,S Miglioranzi,F Sciulli,T W Jones,G Iacobucci,A Caldwell,V Libov,D Kollár ,R Shehzadi,D.s Zotkin ,S Shimizu,Wolfram Dietrich Zeuner ,P D Allfrey,M Jiménez ,Ning Ye ,R Sacchi,P Bussey ,G Bruni,F Dal Corso ,R Carlin,A Lee,G Hartner,R Walsh,L A Khein,K Tokushuku,S Kagawa,M Vázquez,A Montanari,D Lontkovskyi,Y Yamazaki,M Corradi,M Costa,M Gil,J M Butterworth,І Каденко ,A Solano,B.o Zhautykov ,J Whitmore ,S S Fang ,K Borras,Hiroshi Kaji ,I Grabowska-Bołd,P Schleper,P Kooijman,A Geiser,K Nagano,W Lohmann,Z Ren,R Ciesielski,P Ermolov ,R.c.e Devenish ,L Adamczyk,N Vlasov ,M.c.k Mattingly ,S Suchkov,Philipp Roloff ,D Kisielewska,M Borodin,M Lisovyi,N Coppola,William M Dunne ,C A Fry

doi:10.1140/epjc/s10052-009-0881-x

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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