Search for a Low Mass Particle Decaying into mu(+)mu(-) in B-0 -> K*X-0 and B-0 ->rho X-0 at Belle

	*Search for a Low Mass Particle Decaying into mu(+)mu(-) in B-0 -> KX-0 and B-0 ->rho X-0 at Belle**
	Belle Collaboration
刊名	PHYSICAL REVIEW LETTERS
	2010
卷号	105 期号:9
关键词	CONSTRAINTS GRAVITINO ENERGIES EVENTS BOSON
通讯作者	Park, HK (reprint author), Kyungpook Natl Univ, Taegu 702701, South Korea.
英文摘要	We search for dimuon decays of a low mass particle in the decays B-0 -> KX-0 and B-0 -> rho X-0 using a data sample of 657 x 10(6)B (B) over bar events collected with the Belle detector at the KEKB asymmetric- energy e(+)e(-) collider. We find no evidence for such a particle in the mass range from 212 MeV/c(2) to 300 MeV/c(2) for lifetimes below 10(-12) s, and set upper limits on its branching fractions. In particular, we search for a particle with a mass of 214: 3 MeV/c(2) reported by the HyperCP experiment, and obtain upper limits on the products B(B-0 -> KX-0) x B(X mu(+)mu(-)) < 2.26(2.27) x 10(-8) and B(B-0 -> rho X-0) x B(X -> mu(+)mu(-)) < 1.73(1.73) x 10(-8) at 90% C.L. for a scalar (vector) X particle.
学科主题	Physics
类目[WOS]	Physics, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000281229300002
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/212977]
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	Belle Collaboration. Search for a Low Mass Particle Decaying into mu(+)mu(-) in B-0 -> K*X-0 and B-0 ->rho X-0 at Belle[J]. PHYSICAL REVIEW LETTERS,2010,105(9).
APA	Belle Collaboration.(2010).Search for a Low Mass Particle Decaying into mu(+)mu(-) in B-0 -> K*X-0 and B-0 ->rho X-0 at Belle.PHYSICAL REVIEW LETTERS,105(9).
MLA	Belle Collaboration."Search for a Low Mass Particle Decaying into mu(+)mu(-) in B-0 -> K*X-0 and B-0 ->rho X-0 at Belle".PHYSICAL REVIEW LETTERS 105.9(2010).