Relating D0-anti-D0 Mixing and D0 -> l+l- with New Physics

TL;DR

This paper explores how new physics models linking D0-anti-D0 mixing and rare D0 decays can predict decay rates based on mixing observations, providing a way to identify new physics effects.

Contribution

It demonstrates a direct correlation between D0-anti-D0 mixing and D0 -> l+l- decay rates within certain new physics models, highlighting how decay observations can reveal new physics.

Findings

Decay rates for D0 -> l+l- are fixed by mixing if new physics dominates.

Observation of excess D0 -> l+l- decays indicates new physics contributions.

A simple correlation exists between mixing and decay amplitudes in certain models.

Abstract

We point out how, in certain models, the same combination of New Physics couplings occur in the amplitudes for both D0-anti-D0 mixing and the rare decays D0 -> l+l-. If the New Physics dominates and is responsible for the observed mixing, then a very simple correlation exists between the magnitudes of each; in fact the rates for the decay D0 -> l+l- are completely fixed by the mixing. Observation of D0 -> l+l- in excess of the Standard Model prediction could identify New Physics contributions to D0-anti-D0 mixing.