Light top quark and light charged higgs revisited

Joshipura, Anjan S. ; Rindani, Saurabh D. (1991) Light top quark and light charged higgs revisited Modern Physics Letters A, 6 (37). pp. 3375-3383. ISSN 0217-7323

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A model with two Higgs doublets is presented where a discrete symmetry is imposed so that the flavor-changing neutral currents in the down-quark sector are naturally suppressed and obey a hierarchy determined by the hierarchy of the Kobayashi-Maskawa matrix elements. The fermion couplings to charged-Higgs bosons are different from those in models with natural flavor conservation. As a consequence, it is possible to have a light top quark which evades the Tevatron limit by decaying predominantly into a light charged Higgs with mass MH ≤ mt - mb. The model is also consistent with data on ε and B0-B̅0 mixing for a wide range of MH and the ratio of vacuum expectation values of the scalar fields.

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Deposited On:31 Oct 2011 05:25
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