Observation of the P-1(1) state of charmonium Academic Article uri icon

abstract

  • The spin-singlet P-wave state of charmonium, hc(1P1), has been observed in the decay (2S)0hc followed by hcc. Inclusive and exclusive analyses of the M(hc) spectrum have been performed. Two complementary inclusive analyses select either a range of energies for the photon emitted in hcc or a range of values of M(c). These analyses, consistent with one another within statistics, yield M(hc)=[3524.90.7(stat)0.4(sys)]MeV/c2 and a product of the branching ratios B((2S)0hc)Bh(hcc)= [3.51.0(stat)0.7(sys)]10-4. When the c is reconstructed in seven exclusive decay modes, 17.54.5 hc events are seen with an average mass M(hc)=[3523.60.9(stat)0.5(sys)]MeV/c2, and BBh=[5.31.5(stat)1.0(sys)]10-4. If combined, the inclusive and exclusive data samples yield an overall mass M(hc)=[3524. 40.6(stat)0.4(sys)]MeV/c2 and product of branching ratios BBh=[4.00.8(stat)0.7(sys)]10-4. The hc mass implies a P-wave hyperfine splitting MHF(1P)M(13P)-M(11P1)=[1.00.6(stat) 0.4(sys)]MeV/c2. 2005 The American Physical Society.

published proceedings

  • PHYSICAL REVIEW D

altmetric score

  • 3

author list (cited authors)

  • Rubin, P., Cawlfield, C., Eisenstein, B. I., Gollin, G. D., Karliner, I., Kim, D., ... Yelton, J.

citation count

  • 52

complete list of authors

  • Rubin, P||Cawlfield, C||Eisenstein, BI||Gollin, GD||Karliner, I||Kim, D||Lowrey, N||Naik, P||Sedlack, C||Selen, M||White, EJ||Williams, J||Wiss, J||Edwards, KW||Besson, D||Pedlar, TK||Cronin-Hennessy, D||Gao, KY||Gong, DT||Hietala, J||Kubota, Y||Klein, T||Lang, BW||Li, SZ||Poling, R||Scott, AW||Smith, A||Dobbs, S||Metreveli, Z||Seth, KK||Tomaradze, A||Zweber, P||Ernst, J||Mahmood, AH||Severini, H||Asner, DM||Dytman, SA||Love, W||Mehrabyan, S||Mueller, JA||Savinov, V||Li, Z||Lopez, A||Mendez, H||Ramirez, J||Huang, GS||Miller, DH||Pavlunin, V||Sanghi, B||Shipsey, IPJ||Adams, GS||Cravey, M||Cummings, JP||Danko, I||Napolitano, J||He, Q||Muramatsu, H||Park, CS||Park, W||Thorndike, EH||Coan, TE||Gao, YS||Liu, F||Artuso, M||Boulahouache, C||Blusk, S||Butt, J||Dorjkhaidav, O||Li, J||Menaa, N||Mountain, R||Nandakumar, R||Randrianarivony, K||Redjimi, R||Sia, R||Skwarnicki, T||Stone, S||Wang, JC||Zhang, K||Csorna, SE||Bonvicini, G||Cinabro, D||Dubrovin, M||Briere, RA||Chen, GP||Chen, J||Ferguson, T||Tatishvili, G||Vogel, H||Watkins, ME||Rosner, JL||Adam, NE||Alexander, JP||Berkelman, K||Cassel, DG||Crede, V||Duboscq, JE||Ecklund, KM||Ehrlich, R||Fields, L||Galik, RS||Gibbons, L||Gittelman, B||Gray, R||Gray, SW||Hartill, DL||Heltsley, BK||Hertz, D||Jones, CD||Kandaswamy, J||Kreinick, DL||Kuznetsov, VE||Mahlke-Kruger, H||Meyer, TO||Onyisi, PUE||Patterson, JR||Peterson, D||Phillips, EA||Pivarski, J||Riley, D||Ryd, A||Sadoff, AJ||Schwarthoff, H||Shi, X||Shepherd, MR||Stroiney, S||Sun, WM||Urner, D||Wilksen, T||Weaver, KM||Weinberger, M||Athar, SB||Avery, P||Breva-Newell, L||Patel, R||Potlia, V||Stoeck, H||Yelton, J

publication date

  • November 2005