We report a measurement of the branching fraction for psi(3770)-->gamma chi_c1 and search for the transition psi(3770)-->gamma chi_c2 based on 2.92 fb-1 of e+e- data accumulated at sqrt(s)=3.773 GeV with the BESIII detector at the BEPCII collider. We measure B(psi(3770)-->gamma chi_c1)=(2.48±0.15±0.23)x10-3, which is the most precise measurement to date. The upper limit on the branching fraction of psi(3770)-->gamma chi_c2 at a 90% confidence level is B(psi(3770)-->gamma chi_c2)<0.64x10-3. The corresponding partial widths are Gamma(psi(3770)-->gamma chi_c1)=(67.5±4.1±6.7) keV and Gamma(psi(3770)-->gamma chi_c2)<17.4 keV.

Measurement of B (psi(3770) --> gamma chi_c1) and search for psi(3770)-->gamma chi_c2

Garzia, I.;
2015

Abstract

We report a measurement of the branching fraction for psi(3770)-->gamma chi_c1 and search for the transition psi(3770)-->gamma chi_c2 based on 2.92 fb-1 of e+e- data accumulated at sqrt(s)=3.773 GeV with the BESIII detector at the BEPCII collider. We measure B(psi(3770)-->gamma chi_c1)=(2.48±0.15±0.23)x10-3, which is the most precise measurement to date. The upper limit on the branching fraction of psi(3770)-->gamma chi_c2 at a 90% confidence level is B(psi(3770)-->gamma chi_c2)<0.64x10-3. The corresponding partial widths are Gamma(psi(3770)-->gamma chi_c1)=(67.5±4.1±6.7) keV and Gamma(psi(3770)-->gamma chi_c2)<17.4 keV.
2015
Ablikim, M.; Achasov, M. N.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Baldini Ferroli, R.; B...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2378085
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