Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on the mSUGRA parameter space from electroweak precision
  data   We place constraints on the parameter space of the minimal supergravity
(SUGRA) inspired supersymmetric (SUSY) extension of the standard model (SM),
i.e. the mSUGRA model, by studying the loop-level contributions of
supersymmetric particles to electroweak precision observables. In general the
Higgs and superpartner particles of SUSY models contribute to electroweak
observables through universal propagator corrections as well as
process-specific vertex and box diagrams. However, because the mass of the
lightest chargino is contrained to be greater than 91 GeV, we find that the
process-dependent contributions to four-fermion amplitudes are negligibly
small. Hence, the full analysis may be reduced to an analysis of the propagator
corrections, and in some regions of parameter space the constraints from the (b
---> s gamma) process are quite important. The propagator corrections are
dominated by the contributions of the scalar fermions, and we summarize the
results in the Peskin-Takeuchi S-T plane and the contributions to the W-boson
mass. We then present the results in the mSUGRA m_0 -- m_{1/2} plane and find
that our analysis of the propagator corrections provides constraints in the
small-m_0 -- small-m_{1/2} region, precisely the region of interest for
collider phenomenology. In some regions of parameter space, especially for mu <
0 and large tan(beta), the constrained region is enlarged considerably by
including the process (b ---> s gamma).

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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: cs
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: eess
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The categories of this paper are: q-alg
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: funct-an
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The categories of this paper are: hep-th