24-30 July 2016
Highfield Campus, University of Southampton
Europe/London timezone

Progress on the lattice QCD calculation of the rare kaon decays: K+ -> pi+ nu nu-bar

28 Jul 2016, 17:10
20m
Building 67 Room 1003 (Highfield Campus, University of Southampton)

Building 67 Room 1003

Highfield Campus, University of Southampton

Highfield Campus, Southampton SO17 1BJ, UK
Talk Weak Decays and Matrix Elements Weak Decays and Matrix Elements

Speaker

Prof. Norman Christ (Columbia University)

Description

The rare kaon decays K+ -> pi+ nu nu-bar are highly suppressed in the standard model and thus provide an ideal place to search for new physics beyond the standard model. These decays are the principal objective of a new experiment, NA62 at CERN. Another new experiment to search for KL -> pi0 nu nu-bar is now underway at J-PARC. Given the goal of 10% precision by NA62, it is important to determine the long-distance contributions to the K+ -> pi+ nu nu-bar amplitude with a controlled uncertainty. In this talk I will report the progress on the lattice QCD calculation of the long-distance contributions to the K+ -> pi+ nu nu-bar decay amplitude, with an emphasis on the treatment of the short-distance divergence in the bilocal operator system.

Primary authors

Prof. Norman Christ (Columbia University) Dr Xu Feng (Peking University)

Co-authors

Dr Andreas Juettner (University of Southampton) Mr Andrew Lawson (University of Southampton) Dr Antonin Portelli (The University of Edinburgh) Prof. Christopher Sachrajda (University of Southampton)

Presentation Materials

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