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Search for eta(c)(2S)h(c) -> p(p)over-bar decays and measurements of the chi(cJ) -> p(p)over-bar branching fractions
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2013 (English)In: Physical Review D, ISSN 1550-7998, Vol. 88, no 11, 112001- p.Article in journal (Refereed) Published
Abstract [en]

Using a sample of 1.06 x 10(8)psi(3686) events collected with the BESIII detector at BEPCII, the decays eta(c)(2S) -> p (p) over bar and h(c) -> p (p) over bar are searched for, where eta(c)(2S) and h(c) are reconstructed in the decay chains psi(3686) -> gamma eta(c)(2S), eta(c)(2S) -> p (p) over bar and psi(3686) -> pi(0)h(c), h(c) -> p (p) over bar, respectively. No significant signals are observed. The upper limits of the product branching fractions are determined to be B(psi(3686) -> gamma eta(c)(2S)) x B(eta(c)(2S) -> p (p) over bar) < 1.4 x 10(-6) and B(psi(3686) -> pi(0)h(c)) x B(h(c) -> p<(p)over bar>) < 1.3 x 10(-7) at the 90% C.L.. The branching fractions for chi(cJ) -> p<(p)over bar> (J = 0, 1, 2) are also measured to be (24.5 +/- 0.8 +/- 1.3, 8.6 +/- 0.5 +/- 0.5, 8.4 +/- 0.5 +/- 0.5) x 10(-5), which are the world's most precise measurements.

Place, publisher, year, edition, pages
2013. Vol. 88, no 11, 112001- p.
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-217670DOI: 10.1103/PhysRevD.88.112001ISI: 000328601900001OAI: oai:DiVA.org:uu-217670DiVA: diva2:693834
Available from: 2014-02-05 Created: 2014-02-04 Last updated: 2014-02-11Bibliographically approved

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Johansson, TordKupsc, AndrzejSchonning, KarinWolke, Magnus
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