A method of combined D-0 and D+ single and double tags to measure their branching fractions and its application

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	A method of combined D-0 and D+ single and double tags to measure their branching fractions and its application
其他题名	用联合D0和D+单双标记测定分支比的方法
	Rong G(荣刚); Luo CH(罗春晖); Yan WG(严武光); Xu CC(徐春成); Zhang DH(张达华); Heng YK(衡月昆); He KL(何康林); Zhao HW(赵海文); Mao HS(毛慧顺); Ma JM(马基茂); Zhang C(张纯); Rong, G; Zhao, JW; Luo, CH; Yan, WG; Xu, CC; Zhang, DH; Heng, YK; He, KL; Zhao, HW; Mao, HS; Ma, JM; Chen, HF; Zhang, C
	2002
发表期刊	HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION
卷号	26 期号:3 页码:#REF!
通讯作者	Rong, G (reprint author), CAS, Inst High Energy Phys, Beijing 100039, Peoples R China.
文章类型	Article
摘要	A method of combined D-0 and D+ single and double tags to measure their branching fractions is reported. With this method, we can measure the inclusive and exclusive branching fractions of D-0 and D+ based on the data taken at roots = 4.03 GeV using BES detector at BEPC collider. As well known, it is very difficult to study D physics with the data taken at roots = 4.03GeV. Compared with the data taken at roots = 3. 77 GeV, where it is just at the threshold of the pure pairs of D+ D- and D-0 (D) over bar (0) productions. While at roots = 4.03 GeV D ($) over bar () and D- (D) over bar () can also be produced and then the so-called contaminated final states D+ (D) over bar (0) and D- (D) over bar (0) can be produced via the cascade decays of the D+ to charged and neutral D. This makes some trouble for the study. The key to solve this problem is how to determine the ratios beta, which denotes the recoil (D) over bar (0) production agaist the tagged D+, and eta, which denotes the recoil D- production agaist the tagged D-0. We developed the double tag method and single tag method to determine these two parameters, and compared them with cross section method developed by us before. They are consistent with each other within errors, so that the validity of this method was proved. As an example of its application, we set the upper limit for D- --> phie(+) nu decay to be Br(D+ --> phie(+) nu) < 1.6 % at 90 % C. L.. This value is consistent with that BES Collaboration published.
关键词	BES BEPC D meson single tag double tag inclusive decay branching fraction
学科领域	Physics
收录类别	SCI
WOS类目	Physics, Nuclear ; Physics, Particles & Fields
WOS记录号	WOS:000174634700003
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/226939
专题	实验物理中心
推荐引用方式 GB/T 7714	Rong G,Luo CH,Yan WG,et al. A method of combined D-0 and D+ single and double tags to measure their branching fractions and its application[J]. HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,2002,26(3):#REF!.
APA	荣刚.,罗春晖.,严武光.,徐春成.,张达华.,...&Zhang, C.(2002).A method of combined D-0 and D+ single and double tags to measure their branching fractions and its application.HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION,26(3),#REF!.
MLA	荣刚,et al."A method of combined D-0 and D+ single and double tags to measure their branching fractions and its application".HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION 26.3(2002):#REF!.