Unfactorizing polychromatic penguins

Santi Peris

doi:10.1016/j.nuclphysbps.2004.04.172

Unfactorizing polychromatic penguins

Santi Peris

Department of Physics

Research output: Contribution to journal › Article › Research › peer-review

1 Citation (Scopus)

Abstract

Firstly, I report on a recent work - carried out with T. Hambye and E. de Rafael- on how to use the large-Nc expansion to calculate unfactorized contributions from the strong penguin operators, and their impact on observables such as ε′/ε and the δI = 1/2 rule. Secondly, based on work done with M. Golterman, I explain how this calculation allows one to predict some rather dramatic consequences for quenched QCD. This may help explain the present discrepancy between lattice and experimental results for ε′/ε. The emphasis of this article is put on the explanation of the method of calculation used, which is fully analytic. This allows one to build some intuition and understand the role played by the different hadronic scales in determining the size of the different contributions. © 2004 Published by Elsevier B.V.

Original language	English
Pages (from-to)	239-244
Journal	Nuclear Physics B - Proceedings Supplements
Volume	133
Issue number	1-3 SUPPL.
DOIs	https://doi.org/10.1016/j.nuclphysbps.2004.04.172
Publication status	Published - 1 Jul 2004

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10.1016/j.nuclphysbps.2004.04.172

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title = "Unfactorizing polychromatic penguins",

abstract = "Firstly, I report on a recent work - carried out with T. Hambye and E. de Rafael- on how to use the large-Nc expansion to calculate unfactorized contributions from the strong penguin operators, and their impact on observables such as ε′/ε and the δI = 1/2 rule. Secondly, based on work done with M. Golterman, I explain how this calculation allows one to predict some rather dramatic consequences for quenched QCD. This may help explain the present discrepancy between lattice and experimental results for ε′/ε. The emphasis of this article is put on the explanation of the method of calculation used, which is fully analytic. This allows one to build some intuition and understand the role played by the different hadronic scales in determining the size of the different contributions. {\textcopyright} 2004 Published by Elsevier B.V.",

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AB - Firstly, I report on a recent work - carried out with T. Hambye and E. de Rafael- on how to use the large-Nc expansion to calculate unfactorized contributions from the strong penguin operators, and their impact on observables such as ε′/ε and the δI = 1/2 rule. Secondly, based on work done with M. Golterman, I explain how this calculation allows one to predict some rather dramatic consequences for quenched QCD. This may help explain the present discrepancy between lattice and experimental results for ε′/ε. The emphasis of this article is put on the explanation of the method of calculation used, which is fully analytic. This allows one to build some intuition and understand the role played by the different hadronic scales in determining the size of the different contributions. © 2004 Published by Elsevier B.V.

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VL - 133

SP - 239

EP - 244

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ER -

Unfactorizing polychromatic penguins

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