QQ客服 官方微博 反馈留言

	Wedgebox analysis of four-lepton events from neutralino pair production at the LHC
	Bian, G. ; Bisset, M. ; Kersting, N. ; Liu, Y. ; Wang, X.
	2010-05-06 ; 2010-05-06
关键词	SUPERSYMMETRIC STANDARD MODEL BOOSTED DECISION TREES CHARGED HIGGS BOSONS PARTICLE IDENTIFICATION PHYSICS DECAYS EXTENSION TEVATRON COLLIDER BREAKING Physics, Particles & Fields
中文摘要	A 'wedgebox' plot is a two-dimensional scatter-plot of two invariant mass quantities. Here pp -> e(+) e(-) mu(+) mu(-) + E signature LHC events are analyzed by plotting the di-electron invariant mass versus the di-muon invariant mass. Data sets of such events are obtained across the MSSM input parameter space in realistic event-generator simulations, including cuts designed to remove SM backgrounds. Their study reveals several general features. Firstly, regions in the MSSM input parameter space where a sufficient number of events are expected so as to be able to construct a clear wedgebox plot are delineated. Secondly, the presence of box shapes on a wedgebox plot either indicates the presence of heavy Higgs bosons' decays or restricts the location to a quite small region of low mu and M-2 values, less than or similar to 200 GeV, a region denoted as the 'lower island'. In this region, wedgebox plots can be quite complicated and change in pattern rather quickly as one moves around in the (mu,M-2) plane. Thirdly, direct neutralino pair production from an intermediate Z(0)* may only produce a wedge shape since only chi(similar to 0)(2)chi(similar to 0)(3) decays can contribute significantly. And fourthly, a double-wedge or wedge-protruding-from-a-box pattern on a wedgebox plot, which results from combining a variety of MSSM production processes, yields three distinct observed endpoints, almost always attributable to chi(similar to 0)(2,3,4) -> chi(similar to 0)(1)l(+)l(-) decays, which can be utilized to determine a great deal of information about the neutralino and slepton mass spectra and related MSSM input parameters. Wedge and double-wedge patterns are seen in wedgebox plots in another region of higher mu and M-2 values, denoted as the 'upper island'. Here the pattern is simpler and more stable as one moves across the (mu,M-2) input parameter space.
语种	英语 ; 英语
出版者	SPRINGER ; NEW YORK ; 233 SPRING STREET, NEW YORK, NY 10013 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/14957]
专题	清华大学
推荐引用方式 GB/T 7714	Bian, G.,Bisset, M.,Kersting, N.,et al. Wedgebox analysis of four-lepton events from neutralino pair production at the LHC[J],2010, 2010.
APA	Bian, G.,Bisset, M.,Kersting, N.,Liu, Y.,&Wang, X..(2010).Wedgebox analysis of four-lepton events from neutralino pair production at the LHC..
MLA	Bian, G.,et al."Wedgebox analysis of four-lepton events from neutralino pair production at the LHC".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。