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arXiv 0707.0212hep-ph
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味道物理学中超越的足迹:前两个希格斯双重模型的可能作用

Footprints of the Beyond in flavor physics: Possible role of the Top Two Higgs Doublet Model

Enrico Lunghi, Amarjit Soni

摘要:

B-工厂的结果提供了一个令人印象深刻的确认标准模型(SM)描述的味道和CP破坏。然而,随着更多数据的积累,出现了2.5-3.5 sigma范围内的偏差,指出了B衰变中新的CP奇相和味违反参数的令人兴奋的可能性。首先,这似乎是企鹅主导模式中的时间相关CP不对称性的情况(例如,B -> phi(eta ')Ks)。我们讨论这些和其他偏离SM,并作为一个可能的新的物理场景的说明,我们研究的前两名希格斯双重模型的作用。这是通过添加第二希格斯双重态获得的SM的简单扩展,其中分配了两个希格斯双重态的汤川相互作用,以便自然地解释大的顶夸克质量。当然,标准模型的许多其他扩展也可以解释这些实验偏差。很明显,如果认真对待这些偏差,那么需要一些300 GeV到几TeV的新粒子,以及相关的新CP奇相位。

英文摘要:

The B-factories results provide an impressive confirmation of the Standard Model (SM) description of flavor and CP violation. Nevertheless, as more data were accumulated, deviations in the 2.5-3.5 sigma range have emerged pointing to the exciting possibility of new CP-odd phase(s) and flavor violating parameters in B-decays. Primarily this seems to be the case in the time dependent CP asymmetries in penguin dominated modes (e.g. B -> phi (eta') Ks). We discuss these and other deviations from the SM and, as an illustration of possible new physics scenarios, we examine the role of the Top Two Higgs Doublet Model. This is a simple extension of the SM obtained by adding second Higgs doublet in which the Yukawa interactions of the two Higgs doublets are assigned in order to naturally account for the large top-quark mass. Of course, many other extensions of the Standard Model could also account for these experimental deviations. Clearly if one takes these deviations seriously then some new particles in the 300 GeV to few TeV with associated new CP-odd phase(s) are needed.

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