Lifetime difference in D^0 - \bar{D^0} mixing within R-parity-violating SUSY

TL;DR

This paper investigates how R-parity-violating supersymmetry models can significantly influence the lifetime difference in D^0 - ar{D}^0 mixing, emphasizing the impact of basis choice on experimental constraints.

Contribution

It provides a re-analysis of experimental constraints on RPV SUSY parameters, highlighting the potential for large negative contributions to the lifetime difference.

Findings

RPV SUSY can produce large negative effects on D^0 - ar{D}^0 lifetime difference

The choice of weak or mass basis affects the interpretation of flavor mixing constraints

Constraints on RPV couplings depend critically on basis considerations

Abstract

We re-examine constraints from the recent evidence for observation of the lifetime difference in D^0 - \bar{D}^0 mixing on the parameters of supersymmetric models with R-parity violation (RPV). We find that RPV SUSY can give large negative contribution to the lifetime difference. We also discuss the importance of the choice of weak or mass basis when placing the constraints on RPV-violating couplings from flavor mixing experiments.