# EPS HEP 2013 Stockholm

17-24 July 2013
KTH and Stockholm University Campus
Europe/Stockholm timezone

## Improved tests for CP violation in charm decays

18 Jul 2013, 14:45
15m
D1 (KTH Campus)

### D1

#### KTH Campus

Talk presentation Flavour Physics and Fundamental Symmetries

### Speaker

Amarjit Soni (BNL)

### Description

LHCb experiment over a year ago, opened up a new avenue to investigate the phenomena of CP violation via their first observation of direct CP asymmetry in $D^0 \to \pi^+ \pi ^-$ and to $K^+ K^-$. This observation, though, presents a serious new challenge for theorists, as reliable, quantitative calculations for D decays to hadronic final states are extremely difficult since the charm mass is neither light enough for ChPT or heavy enough for heavy quark effective theory to work. Bearing those difficulties in mind, CP violation in charm decays is further studied in light of more recent experimental results and also incorporating new theoretical developments, in particular from improved understanding from the lattice for the origin of the Delta I=1/2 enhancement. Decisive tests for distinguishing new physics contribution from the SM will be emphasized. The talk will be based primarily on three recent papers, arXiv:1202.3795; arXiv:1211.1026 and arXiv:1212.1474.

### Presentation Materials

 EPS-2013-final.pdf EPS-2013-final.pptx