학술논문
Measurements of the mass and width of the eta(c) meson and of an eta(c)(2S) candidate.
Document Type
article
Author
Aubert, B; Barate, R; Boutigny, D; Gaillard, J-M; Hicheur, A; Karyotakis, Y; Lees, JP; Robbe, P; Tisserand, V; Zghiche, A; Palano, A; Pompili, A; Chen, JC; Qi, ND; Rong, G; Wang, P; Zhu, YS; Eigen, G; Ofte, I; Stugu, B; Abrams, GS; Borgland, AW; Breon, AB; Brown, DN; Button-Shafer, J; Cahn, RN; Charles, E; Day, CT; Gill, MS; Gritsan, AV; Groysman, Y; Jacobsen, RG; Kadel, RW; Kadyk, J; Kerth, LT; Kolomensky, Yu G; Kral, JF; Kukartsev, G; LeClerc, C; Levi, ME; Lynch, G; Mir, LM; Oddone, PJ; Orimoto, TJ; Pripstein, M; Roe, NA; Romosan, A; Ronan, MT; Shelkov, VG; Telnov, AV; Wenzel, WA; Ford, K; Harrison, TJ; Hawkes, CM; Knowles, DJ; Morgan, SE; Penny, RC; Watson, AT; Watson, NK; Deppermann, T; Goetzen, K; Koch, H; Lewandowski, B; Pelizaeus, M; Peters, K; Schmuecker, H; Steinke, M; Barlow, NR; Boyd, JT; Chevalier, N; Cottingham, WN; Kelly, MP; Latham, TE; Mackay, C; Wilson, FF; Abe, K; Cuhadar-Donszelmann, T; Hearty, C; Mattison, TS; McKenna, JA; Thiessen, D; Kyberd, P; McKemey, AK; Blinov, VE; Bukin, AD; Golubev, VB; Ivanchenko, VN; Kravchenko, EA; Onuchin, AP; Serednyakov, SI; Skovpen, Yu I; Solodov, EP; Yushkov, AN; Best, D; Bruinsma, M; Chao, M; Kirkby, D; Lankford, AJ; Mandelkern, M; Mommsen, RK
Source
Physical review letters. 92(14)
Subject
Language
Abstract
The mass m(eta(c)) and total width Gamma(eta(c))(tot) of the eta(c) meson have been measured in two-photon interactions at the SLAC e(+)e(-) asymmetric B Factory with the BABAR detector. With a sample of approximately 2500 reconstructed eta(c)-->K(0)(S)K+/-pi(-/+) decays in 88 fb(-1) of data, the results are m(eta(c))=2982.5+/-1.1(stat)+/-0.9(syst) MeV/c(2) and Gamma(eta(c))(tot)=34.3+/-2.3(stat)+/-0.9(syst) MeV/c(2). Using the same decay mode, a second resonance with 112+/-24 events is observed with a mass of 3630.8+/-3.4(stat)+/-1.0(syst) MeV/c(2) and width of 17.0+/-8.3(stat)+/-2.5(syst) MeV/c(2). This observation is consistent with expectations for the eta(c)(2S) state.