Measurements of baryon pair decays of chi(cJ) mesons

Measurements of baryon pair decays of chi(cJ) mesons
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chi(cJ)介子重子对衰变的测量

DOI:
10.1103/physrevd.87.032007
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发表时间:
2012-11
期刊:
Physical Review D - Particles, Fields, Gravitation and Cosmology
影响因子:
--
通讯作者:
Zou, J. H.
Zou, J. H.
中科院分区:
其他
文献类型:
--
作者:
Zhu, Z. A.;Zhuang, J.;Zou, B. S.;Zou, J. H.

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利用BEPCII的BESIII探测器收集的106 × 10 ~(6)psi ~(-1)的衰变数据,研究了χ(cJ)(J = 0,1,2)的三种末态重子对衰变(λ(λ)对bar,σ(0)(σ)对bar(0),σ(+)(σ)对bar(-)).测得支化分数为B(chi(c0,1,2)-> Lambda(Lambda)over bar)=(33.3 +/- 2.0 +/- 2.6)x 10(-5),(12.2 +/- 1.1 +/- 1.1)x 10(-5),(20.8 +/- 1.6 +/- 2.3)x 10(-5),B(chi(c 0,1,2)-> Sigma(0)(Sigma)除以bar(0))=(47.8 +/- 3.4 +/- 3.9)x 10(-5),(3.8 +/- 1.0 +/- 0.5)x 10(-5),(4.0 +/- 1.1 +/- 0.5)x 10(-5),和B(chi(c 0,1,2)-> Sigma(+)(Sigma)除以bar(-))=(45.4 +/- 4.2 +/- 3.0)x 10(-5),(5.4 +/- 1.5 +/- 0.5)x 10(-5),(4.9 +/- 1.9 +/- 0.7)x 10(-5),其中第一个误差是统计误差,第二个误差是系统误差。chi(c1,2)-> Sigma(0)(Sigma)/bar(0),Sigma(+)(Sigma)/bar(-)衰变分支分数的上限估计为B(chi(c1)-> Sigma(0)(Sigma)/bar(0))6.2 × 10(-5),B(chi(c2)-> Sigma(0)Sigma(+)Sigma(+)
Using 106 x 10(6) psi' decays collected with the BESIII detector at the BEPCII, three decays of chi(cJ) (J = 0, 1, 2) with baryon pairs (Lambda(Lambda) over bar, Sigma(0)(Sigma) over bar (0),Sigma(+)(Sigma) over bar (-)) in the final state have been studied. The branching fractions are measured to be B(chi(c0,1,2) -> Lambda(Lambda) over bar) = (33.3 +/- 2.0 +/- 2.6) x 10(-5), (12.2 +/- 1.1 +/- 1.1) x 10(-5), (20.8 +/- 1.6 +/- 2.3) x 10(-5), B(chi(c0,1,2) -> Sigma(0)(Sigma) over bar (0)) = (47.8 +/- 3.4 +/- 3.9) x 10(-5), (3.8 +/- 1.0 +/- 0.5) x 10(-5), (4.0 +/- 1.1 +/- 0.5) x 10(-5), and B(chi(c0,1,2) -> Sigma(+)(Sigma) over bar (-)) = (45.4 +/- 4.2 +/- 3.0) x 10(-5), (5.4 +/- 1.5 +/- 0.5) x 10(-5), (4.9 +/- 1.9 +/- 0.7) x 10(-5), where the first error is statistical and the second is systematic. Upper limits on the branching fractions for the decays of chi(c1,2) -> Sigma(0)(Sigma) over bar (0), Sigma(+)(Sigma) over bar (-) are estimated to be B(chi(c1) -> Sigma(0)(Sigma) over bar (0)) 6.2 x 10(-5), B(chi(c2) -> Sigma(0) Sigma(+) Sigma(+)
DOI: 10.4337/9780857930415.00013
发表时间: 2010-12
期刊: --
影响因子: --
作者:
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DOI: 10.1103/physrevd.65.111102
发表时间: 2002-04
期刊: Physical Review D
影响因子: 5
作者:
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通讯作者: V. Savinov;T. Coan;V. Fadeyev;Y. Gao;Y. Maravin;I. Narsky;R. Stroynowski;J. Ye;T. Wlodek
DOI: 10.4337/9781849805575.00011
发表时间: 2002-01
期刊: IMF Staff Country Reports
影响因子: --
作者:
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通讯作者: T. Scudder