Precision measurements in supersymmetry

Thesis/Dissertation · Mon May 01 04:00:00 EDT 1995

DOI:https://doi.org/10.2172/231655· OSTI ID:231655

Feng, Johnathan Lee ^[1]

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1. Stanford Univ., CA (United States)

Supersymmetry is a promising framework in which to explore extensions of the standard model. If candidates for supersymmetric particles are found, precision measurements of their properties will then be of paramount importance. The prospects for such measurements and their implications are the subject of this thesis. If charginos are produced at the LEP II collider, they are likely to be one of the few available supersymmetric signals for many years. The author considers the possibility of determining fundamental supersymmetry parameters in such a scenario. The study is complicated by the dependence of observables on a large number of these parameters. He proposes a straightforward procedure for disentangling these dependences and demonstrate its effectiveness by presenting a number of case studies at representative points in parameter space. In addition to determining the properties of supersymmetric particles, precision measurements may also be used to establish that newly-discovered particles are, in fact, supersymmetric. Supersymmetry predicts quantitative relations among the couplings and masses of superparticles. The author discusses tests of such relations at a future e{sup +}e{sup {minus}} linear collider, using measurements that exploit the availability of polarizable beams. Stringent tests of supersymmetry from chargino production are demonstrated in two representative cases, and fermion and neutralino processes are also discussed.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 231655
• Report Number(s): SLAC-R--95-466; ON: DE96010902
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
MEASURING METHODS
NONLUMINOUS MATTER
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
PARTICLE PROPERTIES
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING
TESTING