Testing for new physics in singly Cabibbo suppressed D decays
High Energy Physics - Phenomenology
2015-06-04 v1
Abstract
We devise tests for a new physics origin of the recently measured direct CP violation in singly Cabibbo suppressed D decays. The tests take the form of sum rules for the CP asymmetries in various D decays. They are based on the fact that within the standard model CP violation arises from interference of the dominant tree amplitudes with the Delta I=1/2 penguin amplitudes. The sum rules would be violated if the observed CP violation is due to new physics contributions to the effective weak Hamiltonian that change isospin by Delta I=3/2.
Cite
@article{arxiv.1204.3557,
title = {Testing for new physics in singly Cabibbo suppressed D decays},
author = {Yuval Grossman and Alexander L. Kagan and Jure Zupan},
journal= {arXiv preprint arXiv:1204.3557},
year = {2015}
}
Comments
6 pages