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The 27-plet contributions to the CP-conserving K -> pi l(+)l(-) decays

Ananthanarayan, B and Imsong, Sentitemsu I (2012) The 27-plet contributions to the CP-conserving K -> pi l(+)l(-) decays. In: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 39 (9).

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Official URL: http:/dx.doi.org/10.1088/0954-3899/39/9/095002

Abstract

We revisit the rare kaon decays K -> pi l(+)l(-) which are of special interest due to the recent measurements of the charged kaon decay spectra. We compute the contribution of the 27-plet to the decay amplitudes in one loop SU(3) chiral perturbation theory. We estimate the resulting impact to be similar to 10% to the branching ratios of the charged kaon decays, and also noticeably influence the shape of the spectra. With current values of the constants G(8) associated with the octet and G(27) associated with the 27-plet, the contribution of the latter pushes the spectrum in the correct direction, towards the charged lepton spectra. We also discuss the impact for neutral decay rates and spectra.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to the Institute of Physics
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Depositing User: review EPrints Reviewer
Date Deposited: 13 Dec 2012 07:19
Last Modified: 13 Dec 2012 07:19
URI: http://eprints.iisc.ac.in/id/eprint/45165

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