Theoretical status of

Nierste, Ulrich

doi:10.1016/s0920-5632(00)00583-1

Cited by 4 publications

(2 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also known [3][4][5][6][7][8][9][10][11][12] that final state interactions (FSI) play an important role in the observed enhancement of the I = 0 decay amplitude, A 0 /A 2 ≈ 22.2. The presence of such a large phase-shift difference clearly signals a corresponding dispersive FSI effect in the moduli of the isospin amplitudes, because the real and imaginary parts are related by analyticity and unitarity.…”

Section: Introductionmentioning

confidence: 99%

Final state interactions in Kaon decays

Pallante¹,

Pich²

2001

Nuclear Physics B

104

View full text Add to dashboard Cite

We quantify the important effect of strong final state interactions in the weak K → 2π amplitudes, using the measured π-π phase shifts with J = 0 and I = 0, 2. The main results of this analysis, with their implications for ε /ε and the I = 1/2 rule, have been already presented in a previous paper [1]. Here we provide a detailed formal derivation of those results and further discuss the Standard Model prediction of ε /ε.

show abstract

Section: Introductionmentioning

confidence: 99%

Final state interactions in Kaon decays

Pallante¹,

Pich²

2001

Nuclear Physics B

104

View full text Add to dashboard Cite

show abstract

“…This is in agreement with the analyses in Figs. 2͑a͒,2͑b͒,3͑a͒,3͑b͒,4͑a͒,4͑b͒. Such a small parameter space indicates that ⑀Ј/⑀ may impose a very strong constraint on the mass and mixing of the fourth generation up-type quark.…”

Section: The Numerical Analysismentioning

confidence: 99%

Constraints on the mass and mixing of the fourth generation quark from directCPviolationε′/εand rareKdecays

Huang

Huo

2001

Phys. Rev. D

View full text Add to dashboard Cite

We investigate the ⑀Ј/⑀ for K→ in a sequential fourth generation model. By giving the basic formulas for ⑀Ј/⑀ in this model, we analyze the numerical results which are dependent on m t Ј and the imaginary part of the fourth CKM factor, ImV t Ј s * V t Ј d ͑or V t Ј s * V t Ј d and the fourth generation CKM matrix phase ). We find that, unlike the SM, when taking the central values of all parameters for ⑀Ј/⑀, the values of ⑀Ј/⑀ can easily fit to the current experimental data for all values of hadronic matrix elements estimated from various approaches. Also, we show that the experimental values of ⑀Ј/⑀ and rare K decays can provide a strong constraint on both mass and mixing of the fourth generation quark. When taking the values of hadronic matrix elements from the lattice or 1/N expansion calculations, a large region of the up-type quark mass m t Ј is excluded.

show abstract

ε′/ε and rare K and B decays in the MSSM

et al. 2001

View full text Add to dashboard Cite

We analyze the CP violating ratio ε ′ /ε and rare K and B decays in the MSSM with minimal flavour and CP violation, including NLO QCD corrections and imposing constraints on the supersymmetric parameters coming from ε, B 0 d,s −B 0 d,s mixings, B → X s γ, ∆̺ in the electroweak precision studies and from the lower bound on the neutral Higgs mass. We provide a compendium of phenomenologically relevant formulae in the MSSM. Denoting by T (Q) the MSSM prediction for a given quantity normalized to the Standard Model result we find the ranges: 0.53We point out that these ranges will be considerably reduced when the lower bounds on the neutral Higgs mass and tan β improve. Some contour plots illustrate the dependences of the quantities above on the relevant supersymmetric parameters. As a byproduct of this work we update our previous analysis of ε ′ /ε in the SM and find in NDR ε ′ /ε = (9.2 +6.8 −4.0 ), a value 15% higher than in our 1999 analysis.

show abstract

Theoretical status of

Cited by 4 publications

References 49 publications

Final state interactions in Kaon decays

Final state interactions in Kaon decays

Constraints on the mass and mixing of the fourth generation quark from directCPviolationε′/εand rareKdecays

ε′/ε and rare K and B decays in the MSSM

Contact Info

Product

Resources

About