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Measurement of B(psi(3770) -> gamma chi(c1)) and search for psi(3770) -> gamma chi(c2)
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2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 91, no 9, 092009Article in journal (Refereed) Published
Abstract [en]

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 root 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) x 10(-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)) < 0.64 x 10(-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.

Place, publisher, year, edition, pages
2015. Vol. 91, no 9, 092009
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Physical Sciences
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URN: urn:nbn:se:uu:diva-256227DOI: 10.1103/PhysRevD.91.092009ISI: 000355093700003OAI: oai:DiVA.org:uu-256227DiVA: diva2:826423
Available from: 2015-06-25 Created: 2015-06-22 Last updated: 2017-12-04Bibliographically approved

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Johansson, TordKupsc, AndrzejPettersson, JoachimSchönning, KarinWolke, Magnus

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