$R_b$-$R_c$ Crisis and the Higgs Boson Mass from LEP Precision Data

Abstract

We study the effects on the Higgs boson mass from LEP precision data of the new physics explaining $R_b$-$R_c$ crisis. We implement a fit to LEP observables with the new physics. We obtain $M_H^{\mathrm{NewPhysics}}=85_{-56}^{+467}\mathrm{GeV}$. Comparing with the value of the SM fit, $M_H^{\mathrm{SM}}=38_{-21}^{+96}\mathrm{GeV}$, the errors are larger and the central value is higher. The new physics may allow $M_H$ to have a value out of the range of $\mathcal{O}(M_Z)$.

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