New type of mixing in the minimal quark-lepton symmetry and a lower bound on the vector-leptoquark mass
- Yaroslavl State Univ. (Russian Federation)
Some low-energy implications of the minimal extension of the standard model based on Pati-Salam quark-lepton SU(4){sub v} {circle_times} SU(2){sub L} {circle_times} G{sub R} symmetry is analyzed. It is shown that, if this symmetry is realized, it is necessary to consider a new type of mixing in the interaction of SU(4){sub v} leptoquarks with quarks and leptons. The resulting additional arbitrariness in the choice of parameters makes it possible to substantially reduce the lower limit on the vector-leptoquark mass M{sub x} from {pi} and K decays and {mu}e conversion. The only mixing-independent constraint stems from a cosmological estimate of {pi}{sup 0} {yields} v{bar v} decay width and is M{sub x} > 18 TeV. 26 refs., 2 tabs.
- OSTI ID:
- 283093
- Journal Information:
- Physics of Atomic Nuclei, Vol. 58, Issue 12; Other Information: PBD: Dec 1995; TN: Translated from Yadernaya Fizika; 58: No. 12, 2228-2234(1995)
- Country of Publication:
- United States
- Language:
- English
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