Measurement of B(ψ (3770) → γχc1) and search for ψ (3770) → γχc2 /M. Ablikim, M. N. Achasov, X. C. Ai [et.al.]

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Другой Автор
Ablikim, M.
Ai, X. C.
Chelkov, G. A.
Achasov, M. N.
Источник
Physical Review D 2015 Vol. 91, № 9. P. 092009-1-092009-9
Аннотация
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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$a Measurement of B(ψ (3770) → γχc1)  and search for  ψ (3770) → γχc2 $c M. Ablikim, M. N. Achasov, X. C. Ai [et.al.]
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$a 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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$a BESIII, детектор
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$a Ablikim, M.
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$a Ai, X. C.
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$a Chelkov, G. A.
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$a Achasov, M. N.
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$a Томский государственный университет $b Радиофизический факультет $b Научные подразделения РФФ
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$t Physical Review D $d 2015 $g Vol. 91, № 9. P. 092009-1-092009-9 $x 1550-7998
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Предмет
статьи, опубликованные в зарубежных изданиях
Резюме
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.