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Mssm Backgrounds to Lfv Decays and Applications of Wedgebox Plots

Author: WangWeiMin
Tutor: BiKaiJie
School: Tsinghua University
Course: Physics
Keywords: Lepton flavor breaking Minimum supersymmetric standard model Kinematics Invariant mass
CLC: O571.3
Type: Master's thesis
Year: 2009
Downloads: 4
Quote: 0
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Abstract


Electroweak interaction of the Standard Model ( SM ) has been a large number of precise experimental verification, but there are still many problems . Electroweak symmetry spontaneous breaking mechanism remains unclear, neutrino mass , parity violation , as well as sources of CP violation mechanism . Therefore, the search of new physics beyond the standard model of particle physics research frontier , is a high energy physics experiment . People from a different perspective , this paper presents a variety of new physical theories and models , the standard model to be expanded . Type III 2HDM model is generally not depress the taste of the tree diagram level to change the coupling constant , which will lead to similar A0/H0 → τ ± μ such lepton flavor breaking ( LFV ) the possibility of decay . In a recent literature , the author discusses the Hadron Collider such as the Tevatron and LHC detection prospects for LFV decay , provides detailed truncated set to identify the LFV signal and standard model background . In the minimum supersymmetric standard model ( MSSM ) , LFV decay R -parity symmetry is strictly prohibited , R parity conservation requirements supersymmetric particles must be generated in pairs , so the lightest supersymmetric particles should be stable and non- observations ( considered from cosmology ) , which , τ ± μ plus the non - observation of the final state of the particle in the MSSM may occur , which will become the new background LFV detection LFV decay super- symmetric background . Recent studies have shown that if the LHC can observe a certain amount comes from the the MSSM neutralino decay ( chi - 20χ - → e e - mu mu - chi - 10χ ? 01 ) e e-μ μ- examples , then by 5-10% accuracy, the quality of the neutralino kinematic analysis in the two-electron and two - muon invariant mass node instances to rebuild and expand the skills, so that it can handle four with flavor light child , especially τ τ-τ τ- stories.

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CLC: > Mathematical sciences and chemical > Physics > Nuclear physics,high energy physics > Nuclear physics > Radioactive nuclei decay
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