论文标题
最好的小希格斯模型的顶级偶极偶矩的敏感性限制
Sensitivity limits on the weak dipole moments of the top-quark at the Bestest Little Higgs Model
论文作者
论文摘要
我们介绍了有关在最佳的小希格斯模型（BLHM）的背景下，对顶级夸克-$ z $玻色互动的弱偶极矩的敏感性限制的新研究。为此，我们得出相应的Feynman规则。在新的贡献中，有一些是由标量玻色子，矢量玻色子和重夸克的顶点产生的：$ tq_is_i $，（$ s_i = h_0，h_0，h_0，a_0，a_0，ϕ^{0} $ tq_iv_i $，（$ v_i =γ，z，w，z'，w'$）;和$ zq_i \ bar q_i $（$ q_i = b，t，b，t，t，t_5，t_6，t^{2/3}，t^{5/3} $）。使用这些新的顶点，我们在几种情况下计算了对弱偶极矩$ a^w_t $和$ d^w_t $的一环贡献。我们发现，使用BLHM的参数为$ M_ {A_0} = 1000 $ GEV，$ M_ {η^0} = 100 $ GEV，$ f = 4000 $ gev，$ f = [1000，3000] $ GEV和$ \tanβ= 3 $，$ a^w_t $ a^w_t $ a^w_w_t $} \times 10^{-4}-1.26 \times 10^{-5}i$, $1.26 \times 10^{-4}-5.41\times 10^{-6}i$, where the main contribution comes from the scalars $h_0$ and $H_0$, which couples to the top-quark of the Standard Model and the top-quarks of the BLHM.这些值似乎超出了当前实验的预期实验灵敏度的范围。但是，预计对未来山利区的实验足够敏感，可以测量顶级夸克的AWMDM。我们的研究补充了具有扩展标量领域的一环水平的其他研究。
We presented new researches 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: $tq_iS_i$, ($S_i=h_0, H_0, A_0, ϕ^{0}, η^{0}, σ, H^{\pm}, ϕ^{\pm}, η^{\pm}$); $tq_iV_i$, ($V_i= γ, Z, W, Z', W'$); and $Zq_i\bar q_i$ ($q_i=b, t, B, T, T_5, T_6, T^{2/3}, T^{5/3}$). With these new vertices, we calculate the one-loop contributions to the weak dipole moments $a^W_t$ and $d^W_t$ of the top-quark in several scenarios. We found that with the parameters of the BLHM of $m_{A_0}= 1000$ GeV, $m_{η^0}= 100$ GeV, $F=4000$ GeV, $f=[1000, 3000]$ GeV and $\tanβ=3$, the $a^W_t$ reaches values with a sensitivity of $a^{W}_{t}= 2.49 \times 10^{-4}-1.26 \times 10^{-5}i$, $1.26 \times 10^{-4}-5.41\times 10^{-6}i$, where the main contribution comes from the scalars $h_0$ and $H_0$, which couples to 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 AWMDM of the top-quark. Our study complements other studies at the level of one-loop with an extended scalar sector.
