Observation of a New Charmed Meson

• Main Authors: Albrecht, H., Binder, U., Harder, G., Lembke-Koppitz, I., Philipp, A., Schmidt-Parzefall, W., Schroder, H., Schulz, H. D., Wurth, R., Donker, J. P., Drescher, A., Matthiesen, U., Scheck, H., Spaan, B., Spengler, J., Wegener, D., Gabriel, J. C., Schubert, Klaus R., Stiewe, J., Waldi, R., Weseler, S., Brown, N. N., Edwards, K. W., Frisken, William R., Fukunaga, C., Gilkinson, D. J., Gingrich, D. M., Goddard, M., Kapitza, H., Kim, P. C. H., Kutschke, Robert K., MacFarlane, D. B., McKenna, J. A., McLean, K. W., Nilsson, A. W., Orr, R. S., Padley, B. Paul, Patel, P. M., Prentice, J. D., Seywerd, H. C. J., Stacey, B. J., Yoon, T. S., Yun, J. C., Ammar, R., Coppage, D., Davis, R., Kanekal, S., Kwak, N., Kernel, G., Plesko, M., Jonsson, L., Oku, Y., Babaev, A., Danilov, M., Golutvin, A., Lyubimov, V., Matveev, V., Nagovitsyn, V., Ryltsov, V., Semenov, A., Shevchenko, V., Soloshenko, V., Sopov, V., Tikhomirov, I., Zaitsev, Yu, Childers, R., Darden, C. W., Gennow, H.
• Format: Report
• Language: English
• Subjects: (D PI): MASS SPECTRUM; 4-10.6 GEV-CMS; ANNIHILATION: ELECTRON POSITRON; ARGUS; CHARMED MESON > > D PI; COLLIDING BEAMS: ELECTRON POSITRON; D > > D PI; D: ELECTROPRODUCTION; D: HADRONIC DECAY; D: MASS; D: WIDTH; DESY DORIS II STOR; ELECTRON POSITRON: ANNIHILATION; ELECTRON POSITRON: COLLIDING BEAMS; ELECTROPRODUCTION: D; EXPERIMENTAL RESULTS; HADRONIC DECAY: D; MASS SPECTRUM: (D PI); MASS: D; POSTULATED PARTICLE: D; QUARK: CHARM; QUARK: FRAGMENTATION FUNCTION
• ISSN: 0031-9007; 1092-0145; 1079-7114
• DOI: 10.3204/pubdb-2017-03095

Using the ARGUS detector at the DORIS II e+e− storage ring at DESY, we have obtained evidence for a new charmed resonance which decays into D*±(2010)π∓. The observed mass and width are 2420±6 MeV/c2 and 70±21 MeV/c2, respectively. The fragmentation function is found to be hard, as expected for a state containing a leading charm quark produced by nonresonant e+e− annihilation.