N=1 Supergravity, the Weak Scale and the Low-Energy Particle Spectrum

Ibanez, Luis E.; Lopez, C.

doi:10.1016/0550-3213(84)90581-9

N=1 Supergravity, the Weak Scale and the Low-Energy Particle Spectrum

Luis E. Ibanez
(
- CERN
)
,
C. Lopez
(
- Madrid, Autonoma U.
)

Jul, 1983

34 pages

Published in:

Nucl.Phys.B 233 (1984) 511-544

Published: 1984

DOI:

10.1016/0550-3213(84)90581-9

Report number:

CERN-TH-3650

View in:

CERN Document Server

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Abstract: (Elsevier)

We consider in detail the radiative SU(2) × U(1) breaking induced by broken N = 1 supergravity. We include in this study some parameters (b-quark Yukawas, mixed Higgs mass terms) neglected in a previous analysis. We show that there are essentially two types of mechanisms leading to radiative SU(2) × U(1) breaking. The first of them occurs for a t-quarks mass m t ⪆60 GeV. The second one appears for arbitrary small values of m t (without using a large A ). These two mechanism correspond to two different classes of local SUSY GUTs. We present results for the low-energy supersymmetric particle spectrum. In some of the possible scenarios presented, squarks, sleptons and/or gauginos are accessible to present accelerator energies. In other scenarios, the scalar neutrinos may be the lightest R-odd particles. We finally remark that the SU(5) prediction for m b / m t is substanially suppressed for a heavy t-quark.

SUPERGRAVITY
GRAND UNIFIED THEORY
POSTULATED PARTICLE: GAUGINO
MASS FORMULA
top
BOTTOM
QUARK: MASS
MASS: QUARK
SYMMETRY BREAKING: SU(2) X U(1)
RADIATIVE CORRECTION

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