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arXiv 0904.2387hep-ph
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top-Higgs反常耦合的最小集合

A minimal set of top-Higgs anomalous couplings

J. A. Aguilar-Saavedra

摘要:

我们使用运动方程来简化由六维规范不变有效算符产生的费米子-费米子-希格斯相互作用的一般形式。去掉多余算符后,发现离壳费米子fi,fj和离壳希格斯玻色子玻色子的最一般Hfifj顶点只包含标量和赝标量项,不含导数.例子Htt和Htq的相互作用,其中q=u,c,给出明确的表达的规范不变的运营商的顶点。这里得到的新的运营商等式也减少了Ztq顶点相关的运营商的数量,虽然这些相互作用的一般形式并没有简化相对于以前的结果。

英文摘要:

We use the equations of motion to simplify the general form of fermion-fermion-Higgs interactions generated by dimension-six gauge-invariant effective operators. After removing redundant operators it is found that the most general H f_i f_j vertex for off-shell fermions f_i, f_j and an off-shell Higgs boson only involves scalar and pseudo-scalar terms, without derivatives. Examples are presented for the Htt and Htq interactions, where q=u,c, giving the explicit expressions of the vertices in terms of gauge-invariant operators. The new operator equalities obtained here also reduce the number of operators relevant for the Ztq vertices, although the general form of these interactions is not simplified with respect to previous results.

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