Weak dipole moments of the top-quark at the Bestest Little Higgs model

We present a new search for the sensitivity limits on the weak dipole moments of the top-quark -Z boson interactions in the context of the Bestest Little Higgs Model (BLHM). For this purpose, we derive the corresponding Feynman rules. Among the new contributions, there are those arising from the vertices of scalar bosons, vector bosons and heavy quarks contribution: t(qi)S(i) , (S-i = h(0), H-0, A(0), phi(0), eta(0), sigma, H-+/-, phi(+/-), eta(+/-)); t(qi)V(i), (V-i = gamma, Z, W, Z', W'); and Z(qiq(sic)i) (q(i) = b, t, B, T, T-5, T-6, T-2/3, T-5/3). With these new vertices, we calculate the one-loop contributions to the weak dipole moments a(t)(W) and d(t)(W) of the top-quark in several scenarios. We found that with the parameters of the BLHM of mA(0) = 1000 GeV, m eta(0) = 100 GeV, F = 4000 GeV, f = [1000, 3000] GeV and tan beta = 3, the a(t)(W) reaches values with a sensitivity of a(t)(W)= 1.98 x 10(-4) - 1.26 x 10(-5) i, 9.02 x 10(-5) - 5.40 x 10(-6) i, where the main contribution comes from the scalars h(0) and H-0, which couples with the top-quark of the Standard Model and the top-quarks of the BLHM. These values seem to be out of the reach of the expected experimental sensitivity of present experiments. However, experiments on future colliders are expected to be sensitive enough to measure the anomalous weak magnetic dipole moment of the top-quark. Our study complements other studies at the one-loop level with an extended scalar sector.