Ablikim, M; Achasov, MN; Ai, XC; Albayrak, O; Albrecht, M; Ambrose, DJ; Amoroso, A; An, FF; An, Q; Bai, JZ; Ferroli, R Baldini; Ban, Y; Bennett, DW; Bennett, JV; Bertani, M; Bettoni, D; Bian, JM; Bianchi, F; Boger, E; Bondarenko, O; Boyko, I; Briere, RA; Cai, H; Cai, X; Cakir, O; Calcaterra, A; Cao, GF; Cetin, SA; Chang, JF; Chelkov, G; Chen, G; Chen, HS; Chen, HY; Chen, JC; Chen, ML; Chen, SJ; Chen, X; Chen, XR; Chen, YB; Cheng, HP; Chu, XK; Cibinetto, G; Cronin-Hennessy, D; Dai, HL; Dai, JP; Dbeyssi, A; Dedovich, D; Deng, ZY; Denig, A; Denysenko, I; Destefanis, M; De Mori, F; Ding, Y; Dong, C; Dong, J; Dong, LY; Dong, MY; Du, SX; Duan, PF; Fan, JZ; Fang, J; Fang, SS; Fang, X; Fang, Y; Fava, L; Feldbauer, F; Felici, G; Feng, CQ; Fioravanti, E; Fritsch, M; Fu, CD; Gao, Q; Gao, XY; Gao, Y; Gao, Z; Garzia, I; Geng, C; Goetzen, K; Gong, WX; Gradl, W; Greco, M; Gu, MH; Gu, YT; Guan, YH; Guo, AQ

doi:10.1103/physrevd.91.092009

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Measurement of B(ψ(3770)→γχc1) and search for ψ(3770)→γχc2

2015

Ablikim, M;
Achasov, MN;
Ai, XC;
Albayrak, O;
Albrecht, M;
Ambrose, DJ;
Amoroso, A;
An, FF;
An, Q;
Bai, JZ;
Ferroli, R Baldini;
Ban, Y;
Bennett, DW;
Bennett, JV;
Bertani, M;
Bettoni, D;
Bian, JM;
Bianchi, F;
Boger, E;
Bondarenko, O;
Boyko, I;
Briere, RA;
Cai, H;
Cai, X;
Cakir, O;
Calcaterra, A;
Cao, GF;
Cetin, SA;
Chang, JF;
Chelkov, G;
Chen, G;
Chen, HS;
Chen, HY;
Chen, JC;
Chen, ML;
Chen, SJ;
Chen, X;
Chen, XR;
Chen, YB;
Cheng, HP;
Chu, XK;
Cibinetto, G;
Cronin-Hennessy, D;
Dai, HL;
Dai, JP;
Dbeyssi, A;
Dedovich, D;
Deng, ZY;
Denig, A;
Denysenko, I;
Destefanis, M;
De Mori, F;
Ding, Y;
Dong, C;
Dong, J;
Dong, LY;
Dong, MY;
Du, SX;
Duan, PF;
Fan, JZ;
Fang, J;
Fang, SS;
Fang, X;
Fang, Y;
Fava, L;
Feldbauer, F;
Felici, G;
Feng, CQ;
Fioravanti, E;
Fritsch, M;
Fu, CD;
Gao, Q;
Gao, XY;
Gao, Y;
Gao, Z;
Garzia, I;
Geng, C;
Goetzen, K;
Gong, WX;
Gradl, W;
Greco, M;
Gu, MH;
Gu, YT;
Guan, YH;
Guo, AQ;
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et al.

Published Web Location

https://doi.org/10.1103/physrevd.91.092009

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Abstract

We report a measurement of the branching fraction for ψ(3770)→γχc1 and search for the transition ψ(3770)→γχc2 based on 2.92 fb-1 of e+e- data accumulated at s=3.773 GeV with the BESIII detector at the BEPCII collider. We measure B(ψ(3770)→γχc1)=(2.48±0.15±0.23)×10-3, which is the most precise measurement to date. The upper limit on the branching fraction of ψ(3770)→γχc2 at a 90% confidence level is B(ψ(3770)→γχc2)<0.64×10-3. The corresponding partial widths are Γ(ψ(3770)→γχc1)=(67.5±4.1±6.7) keV and Γ(ψ(3770)→γχc2)<17.4 keV.

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Measurement of B(ψ(3770)→γχc1) and search for ψ(3770)→γχc2

Published Web Location