Measuring masses in semi-invisible final states at electron-positron colliders

doi:10.1103/PhysRevD.95.075037

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	Measuring masses in semi-invisible final states at electron-positron colliders
	Bi XJ(毕效军); Yin PF(殷鹏飞); Xiang, QF; Bi, XJ; Yan, QS; Yin, PF; Yu, ZH; Xiang QF(向仟飞)
刊名	PHYSICAL REVIEW D
	2017
卷号	95 期号:7 页码:75037
ISSN号	2470-0010
DOI	10.1103/PhysRevD.95.075037
文献子类	Article
英文摘要	Mass measurement of a particle whose decay products including invisible particles is a challenging task at colliders. For a new physics model involving a dark matter candidate N and a Z(2) symmetry that stabilizes it, a typical new process at e(+) e(-) colliders is the pair production e(+) e(-). Y (Y) over bar followed by decay processes Y -> aN and (Y) over bar -> b (N) over bar, where a and b are visible but N is invisible. In this work, we propose a new method to measure the physical masses in this topology by making use of the kinematic equations given by momentum-energy conservation and on-shell conditions. For each event, the solvability of these equations determines a limited region on the trial m(Y)-m(N) plane. The edge of this region can be used to define two variables, m(Y)(edge) and m(N)(edge), whose distributions are utilized to derive the measurement values of m(Y) and m(N). The measurement deviations and uncertainties are also estimated after including detector effects and background contamination.
电子版国际标准刊号	2470-0029
WOS关键词	HADRON COLLIDERS ; DARK-MATTER ; LHC ; PARTICLES ; ENERGY ; HIGGS ; BOSON ; PAIR
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000400142500001
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284342]
专题	高能物理研究所_粒子天体物理中心
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	Bi XJ,Yin PF,Xiang, QF,et al. Measuring masses in semi-invisible final states at electron-positron colliders[J]. PHYSICAL REVIEW D,2017,95(7):75037.
APA	毕效军.,殷鹏飞.,Xiang, QF.,Bi, XJ.,Yan, QS.,...&向仟飞.(2017).Measuring masses in semi-invisible final states at electron-positron colliders.PHYSICAL REVIEW D,95(7),75037.
MLA	毕效军,et al."Measuring masses in semi-invisible final states at electron-positron colliders".PHYSICAL REVIEW D 95.7(2017):75037.