The Decays K → π l + l − beyond Leading Order in the Chiral Expansion *
نویسندگان
چکیده
We present a model–independent analysis of K
منابع مشابه
Complete Leading Order Analysis in Chiral Perturbation Theory of the Decays K L → γγ and K
The decays KL → γγ and KL → l+l− γ are studied at the leading order p6 in Chiral Perturbation Theory. One-loop contributions stemming from the odd intrinsic parity | ∆S |= 1 effective Lagrangian of order p4 are included and shown to be of possible relevance. They affect the decay KL → γγ adding to the usual pole terms a piece free of counterterm uncertainties. In the case of the KL → l+l− γ dec...
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متن کاملRare Kaon Decays in the 1/n C -expansion
We study the unknown coupling constants that appear at O(p 4) in the Chiral Perturbation Theory analysis of K → πγ * → πl + l − , K +− → π +− γγ [1] and K → ππγ [2] decays. To that end, we compute the chiral realization of the ∆S = 1 Hamilto-nian in the framework of the 1/N c-expansion of the low-energy action proposed in Ref. [3]. The phenomenological implications are also discussed.
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تاریخ انتشار 1998