A right-handed stop not much heavier or even lighter than the Z boson has today desirable phenomenological consequences. We study how it can result within the usual radiative scenario of electroweak symmetry breaking. A restriction on the gaugino mass parameters, M(2) less than or similar to 0.3m(0), arises if soft terms satisfy relations suggested by unification theories. Moreover, requiring to get a light stop without unnatural fine-tunings below the per-cent level, we obtain another more interesting upper bound on the chargino mass, M(chi) less than or similar to M(Z), and we derive interesting conclusions about the masses of the gluino, M(3) similar to (150 divided by 300) GeV, of the heavy stop, M((T) over tilde) similar to (250 divided by 500) GeV, and of the left/right mixing angle in the stop sector, \theta(T)\ less than or similar to 0.3. (C) 1997 Published by Elsevier Science B.V.
Radiatively induced light right-handed stop
STRUMIA, ALESSANDRO
1997-01-01
Abstract
A right-handed stop not much heavier or even lighter than the Z boson has today desirable phenomenological consequences. We study how it can result within the usual radiative scenario of electroweak symmetry breaking. A restriction on the gaugino mass parameters, M(2) less than or similar to 0.3m(0), arises if soft terms satisfy relations suggested by unification theories. Moreover, requiring to get a light stop without unnatural fine-tunings below the per-cent level, we obtain another more interesting upper bound on the chargino mass, M(chi) less than or similar to M(Z), and we derive interesting conclusions about the masses of the gluino, M(3) similar to (150 divided by 300) GeV, of the heavy stop, M((T) over tilde) similar to (250 divided by 500) GeV, and of the left/right mixing angle in the stop sector, \theta(T)\ less than or similar to 0.3. (C) 1997 Published by Elsevier Science B.V.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
