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Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-> K(-)pi(+)chi(c1) decays
Belle Collaboration
2008
发表期刊PHYSICAL REVIEW D
卷号78期号:7
通讯作者Mizuk, R (reprint author), Inst Theoret & Expt Phys, Moscow, Russia.
摘要We report the first observation of two resonancelike structures in the pi(+)chi(c1) invariant mass distribution near 4.1 GeV/c(2) in exclusive (B)overbar(0)-> K(-)pi(+)chi(c1) decays. From a Dalitz plot analysis in which the pi(+)chi(c1) mass structures are represented by Breit-Wigner resonance amplitudes, we determine masses and widths of: M(1)=(4051 +/- 14(-41)(+20)) MeV/c(2), Gamma(1)=(82(-17-22)(+21+47)) MeV, M(2)=(4248(-29-35)(+44+180)) MeV/c(2), and Gamma(2)=(177(-39-61)(+54+316)) MeV; and product branching fractions of B((B)overbar(0)-> K(-)Z(1,2)(+))xB(Z(1,2)(+)->pi(+)chi(c1))=(3.0(-0.8-1.6)(+1.5+3.7))x10(-5) and (4.0(-0.9-0.5)(+2.3+19.7))x10(-5), respectively. Here the first uncertainty is statistical, the second is systematic. The significance of each of the pi(+)chi(c1) structures exceeds 5 sigma, including the systematic uncertainty from various fit models. This analysis is based on 657x10(6) B(B)overbar events collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider.
关键词CHARMONIUM DETECTOR
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.78.072004
收录类别SCI
语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000260574800017
引用统计
被引频次:168[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/212879
专题实验物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Belle Collaboration. Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-> K(-)pi(+)chi(c1) decays[J]. PHYSICAL REVIEW D,2008,78(7).
APA Belle Collaboration.(2008).Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-> K(-)pi(+)chi(c1) decays.PHYSICAL REVIEW D,78(7).
MLA Belle Collaboration."Observation of two resonancelike structures in the pi(+)chi(c1) mass distribution in exclusive (B)overbar(0)-> K(-)pi(+)chi(c1) decays".PHYSICAL REVIEW D 78.7(2008).
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