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	Dalitz-esque treatment of new heavy particle pair production at the LHC
	Bisset, Mike
	2010-05-06 ; 2010-05-06
会议名称	Few-Body Problems in Physics, 2005 ; 3rd Asia-Pacific Conference on Few-Body Problems in Physics (APFB05) ; Nakhon Ratchasima, THAILAND ; Web of Science
关键词	Physics, Atomic, Molecular & Chemical Physics, Nuclear Physics, Particles & Fields
中文摘要	Processes of the form pp -> anything - XiXj -> x (x) over bar + y (y) over bar (+E) are studied via a technique that may be viewed as an adaptation of time-honored Dalitz plot analyses. X-i and X-j are new heavy states (with i, j = 1 ... n), which may be identical or distinct; and x (x) over bar and y (y) over bar are necessarily distinct Standard Model (SM) fermion pairs whose invariant masses can be measured. A Dalitz-like plot of said invariant masses, M(x (x) over bar) vs. M(y (y) over bar), exhibits a topology connected to the masses and specific decay chains of X-i and X-j. Aside from relatively minor details, observed patterns consist of a collection of box and wedge shapes. This collection is model-dependent: comparison of the observed pattern to the possibilities for a specific model yields information on which new particle pair combinations are actually being produced, information beyond that extractable from conventional one-dimensional invariant mass distributions. The technique is illustrated via application to the Minimal Supersymmetric Standard Model (MSSM) process pp -> (g) over bar(g) over bar, <(g)over bar<(q)over bar>, (q) over bar(q) over bar -> (x) over bar (i)o (x) over bar (o)(j) -> e(+)e(-) + mu(+)mu(-) (+E). Here the heavy states are neutralinos (x) over bar (o)(i) (i = 2, 3, 4) -(x) over bar (o)(1) is excluded - which are produced in gluino/squark ((g) over barg/(q) over bar) cascade decay chains. Even with fairly modest expectations for the LHC performance during the first few years, this method still provides substantial insight into the neutralino mass spectrum and couplings if gluino/squark masses are relatively low (similar or equal to 40OGeV).
会议录出版者	WORLD SCIENTIFIC PUBL CO PTE LTD ; SINGAPORE ; PO BOX 128 FARRER RD, SINGAPORE 9128, SINGAPORE
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/6947]
专题	清华大学
推荐引用方式 GB/T 7714	Bisset, Mike. Dalitz-esque treatment of new heavy particle pair production at the LHC[C]. 见:Few-Body Problems in Physics, 2005, 3rd Asia-Pacific Conference on Few-Body Problems in Physics (APFB05), Nakhon Ratchasima, THAILAND, Web of Science.

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