Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state

doi:10.1103/PhysRevD.96.111102

	Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state
	BESIII Collaboration
刊名	PHYSICAL REVIEW D
	2017
卷号	96 期号:11 页码:111102
ISSN号	2470-0010
DOI	10.1103/PhysRevD.96.111102
文献子类	Article
英文摘要	The decays of chi(c2) -> K+K- pi(0), KSK +/-pi(-/+), and pi(+)pi(-)pi(0) are studied with the psi(3686) data samples collected with the Beijing Spectrometer ( BESIII). For the first time, the branching fractions of chi(c2) -> K(K) over bar,chi(c2) -> a(2)(+/-)(1320)pi(-/+)/a(2)(0)(1320)pi(0), and chi(c2) -> rho(770)(+/-)pi(-/+) are measured. Here, K(K) over bar denotes both KK-+/-(-/+) and its isospin-conjugated process K(0)(K) over bar (0) + c: c:, and K* denotes the resonances K(892), K(2)(1430), and K(3)(1780). The observations indicate a strong violation of the helicity selection rule in chi(c2) decays into vector and pseudoscalar meson pairs. The measured branching fractions of chi(c2) -> K(892)(K) over bar are more than ten times larger than the upper limit of chi(c2) -> rho(770)(+/-)pi(-/+), which is so far the first direct observation of a significant U-spin symmetry breaking effect in charmonium decays.
电子版国际标准刊号	2470-0029
WOS关键词	TENSOR FORMALISM ; MESONS
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000417477400001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284427]
专题	高能物理研究所_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	BESIII Collaboration. Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state[J]. PHYSICAL REVIEW D,2017,96(11):111102.
APA	BESIII Collaboration.(2017).Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state.PHYSICAL REVIEW D,96(11),111102.
MLA	BESIII Collaboration."Observation of the helicity-selection-rule suppressed decay of the chi(c2) charmonium state".PHYSICAL REVIEW D 96.11(2017):111102.