Reduction of couplings and heavy top quark in the minimal SUSY GUT

doi:10.1016/0550-3213(94)90296-8

Nuclear Physics B

Volume 424, Issue 2, 8 August 1994, Pages 291-307

https://doi.org/10.1016/0550-3213(94)90296-8 Get rights and content

Abstract

Out of 256 independent reduction solutions that can be found within the minimal supersymmetric SU(5) GUT, there are exactly two asymptotically free solutions which can restrict the top quark mass m_t and do not contradict the observed mass spectrum of the first two fermion generations. A numerical analysis shows that these two solutions lie on the same renormalization group invariant surface on which m_t and the bottom quark mass m_b assume relatively stable values for a given supersymmetry breaking scale m_SUSY = 200 GeV with α_S (M_Z) = 0.12, α_em (M_Z) = (127.9)⁻¹ and m_τ = 1.78 GeV fixed, we find that on this surface m_t and m_t vary 2% and 3% around their central values 182 GeV and 5.3 GeV, respectively.

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⁴: On leave of absence from College of Liberal Arts, Kanazawa University, Japan.

⁵: Partially supported by a CEC project (SCI-CT91-0729). On leave of absence from Physics Department, National Technical University, Athens, Greece.

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Reduction of couplings and heavy top quark in the minimal SUSY GUT

Abstract

Ann. Phys.

Commun. Math. Phys.

Phys. Lett. B

Z. Phys. C

Helv. Phys. Acta

Acta Phys. Polon. B

Nucl. Phys. B

Nucl. Phys. B

Nucl. Phys. B

Phys. Lett. B

Phys. Rev. D

Phys. Rev. Lett.

Phys. Rev. Lett.

Z. Phys. C

Commun. Math. Phys.

Nucl. Phys. B

Phys. Lett. B