Measurements of h(c)(1P(1)) in psi' decays.

Ablikim, M; Achasov, M N; An, L; An, Q; An, Z H; Bai, J Z; Ban, Y; Berger, N; Bian, J M; Boyko, I; Briere, R A; Bytev, V; Cai, X; Cao, G F; Cao, X X; Chang, J F; Chelkov, G; Chen, G; Chen, H S; Chen, J C; Chen, L P; Chen, M L; Chen, P; Chen, S J; Chen, Y B; Chu, Y P; Cronin-Hennessy, D; Dai, H L; Dai, J P; Dedovich, D; Deng, Z Y; Denysenko, I; Destefanis, M; Ding, Y; Dong, L Y; Dong, M Y; Du, S X; Duan, M Y; Fang, J; Feng, C Q; Fu, C D; Fu, J L; Gao, Y; Geng, C; Goetzen, K; Gong, W X; Greco, M; Grishin, S; Gu, Y T; Guo, A Q

Ablikim, M; Achasov, M N; An, L; An, Q; An, Z H; Bai, J Z; Ban, Y; Berger, N; Bian, J M; Boyko, I; Briere, R A; Bytev, V; Cai, X; Cao, G F; Cao, X X; Chang, J F; Chelkov, G; Chen, G; Chen, H S; Chen, J C; Chen, L P; Chen, M L; Chen, P; Chen, S J; Chen, Y B; Chu, Y P; Cronin-Hennessy, D; Dai, H L; Dai, J P; Dedovich, D; Deng, Z Y; Denysenko, I; Destefanis, M; Ding, Y; Dong, L Y; Dong, M Y; Du, S X; Duan, M Y; Fang, J; Feng, C Q; Fu, C D; Fu, J L; Gao, Y; Geng, C; Goetzen, K; Gong, W X; Greco, M; Grishin, S; Gu, Y T; Guo, A Q.

Afiliación

Ablikim M; Institute of High Energy Physics, Beijing 100049, People's Republic of China.

Phys Rev Lett ; 104(13): 132002, 2010 Apr 02.

Article en En | MEDLINE | ID: mdl-20481873

RESUMEN

We present measurements of the charmonium state h(c)(1P(1)) made with 106x10(6) psi' events collected by BESIII at BEPCII. Clear signals are observed for psi'-->pi0 h(c) with and without the subsequent radiative decay h(c)-->gamma eta(c). First measurements of the absolute branching ratios B(psi'-->pi0 h(c)) = (8.4+/-1.3+/-1.0) x 10(-4) and B(h(c)-->gamma eta(c)) = (54.3+/-6.7+/-5.2)% are presented. A statistics-limited determination of the previously unmeasured h(c) width leads to an upper limit Gamma(h(c))<1.44 MeV (90% confidence). Measurements of M(h(c)) = 3525.40+/-0.13+/-0.18 MeV/c2 and B(psi'-->pi0 h(c)) x B(h(c)-->gamma eta(c)) = (4.58+/-0.40+/-0.50) x 10(-4) are consistent with previous results.

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2010 Tipo del documento: Article Pais de publicación: Estados Unidos

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Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2010 Tipo del documento: Article Pais de publicación: Estados Unidos