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

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

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 mea...

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Bibliographic Details
Published in:Physical Review D Vol. 91, № 9. P. 092009-1-092009-9
Corporate Author: Томский государственный университет Радиофизический факультет Научные подразделения РФФ
Other Authors: Ablikim, M., Ai, X. C., Chelkov, G. A., Achasov, M. N.
Format: Article
Language:English
Subjects:
BESIII, детектор
BEPCII, коллайдер
статьи в журналах
Online Access:http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000532660
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Summary: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.
ISSN:1550-7998

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