The B K Kaon Parameter in the Chiral Limit
نویسندگان
چکیده
We introduce four-point functions in the hadronic ladder resummation approach to large Nc QCD Green functions. We determine the relevant one to calculate the BK kaon parameter in the chiral limit. This four-point function contains both the large momenta QCD OPE and the small momenta ChPT at NLO limits, analytically. We get B̂ K = 0.38 ± 0.15. We also give the ChPT result at NLO for the relevant fourpoint function to calculate BK outside the chiral limit, while the leading QCD OPE is the same as the chiral limit one.
منابع مشابه
The B K Kaon Parameter in the 1 / N c Expansion 1
We present work going on calculating the kaon BK parameter in the 1/Nc expansion. The goal of this work is to analyze analytically in the presence of chiral corrections this phenomenologically very important parameter. We present the method used and preliminary results for the chiral limit value for which we get B̂ K = 0.29 ± 0.15. We also give some analytical indications of why the large Nc pre...
متن کاملar X iv : h ep - l at / 9 71 10 14 v 1 1 0 N ov 1 99 7 1 The Kaon B - parameter with the Wilson Quark Action using Chiral Ward
We present a detailed description of the method and results of our calculation of the kaon B parameter using the Wilson quark action in quenched QCD at β = 5.9 − 6.5. The mixing problem of the ∆s = 2 four-quark operators is solved non-perturbatively with full use of chiral Ward identities. We find BK (NDR, 2GeV) = 0.562(64) in the continuum limit, which agrees with the value obtained with the K...
متن کاملar X iv : h ep - l at / 9 70 50 35 v 1 2 6 M ay 1 99 7 Lattice QCD Calculation of the Kaon B - parameter with the Wilson Quark Action
The kaon B parameter is calculated in quenched lattice QCD with the Wilson quark action. The mixing problem of the ∆s = 2 four-quark operators is solved non-perturbatively with full use of chiral Ward identities, and this method enables us to construct the weak four-quark operators exhibiting good chiral behavior. We find BK(NDR, 2GeV) = 0.562(64) in the continuum limit, which agrees with the v...
متن کاملKaon Parameter in the 1 / N c Expansion 1
We present work going on calculating the kaon BK parameter in the 1/Nc expansion. The goal of this work is to analyze analytically in the presence of chiral corrections this phenomenologically very important parameter. We present the method used and preliminary results for the chiral limit value for which we get B̂ K = 0.29 ± 0.15. We also give some analytical indications of why the large Nc pre...
متن کاملep - l at / 9 90 10 18 v 1 2 2 Ja n 19 99 The Kaon B - parameter with the Wilson Quark Action using Chiral Ward Identities JLQCD Collaboration
A lattice QCD calculation of the kaon B parameter BK is carried out with the Wilson quark action in the quenched approximation at β = 6/g2 = 5.9− 6.5. The mixing problem of the ∆s = 2 four-quark operators is solved nonperturbatively with full use of chiral Ward identities employing four external quarks with an equal off-shell momentum in the Landau gauge. This method, without invoking any effec...
متن کامل