TH Informal Lattice Meeting

# Lattice computations of the long-distance contributions to rare kaon decays

## by Christopher Sachrajda (University of Southampton)

Europe/Zurich
4-2-011 - TH common room (CERN)

### 4-2-011 - TH common room

#### CERN

40
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Description
I will review the RBC-UKQCD programme of computations of long-distance contributions to physical processes, focussing on the rare kaon decays $K\to\pi\mu^+\mu^-$ and $K\to\pi\nu\bar{\nu}$. The underlying theoretical framework, which includes issues such as the matching of short and long distance contributions, finite-volume corrections and the presence of unphysical terms in the correlation functions which grow with the time range, will be discussed. Results from exploratory simulations will be presented together with a discussion of the collaboration’s plans and prospects for future computations.
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