Dipenguin-like contributions to D0 - anti-D0 mixing
高能物理 - 唯象学
2009-10-30 v2
摘要
We show that because of the milder GIM suppression, the four-quark dipenguin operator contributes to the short distance piece of the D^0-\bar D^0 mixing amplitude at the same order of magnitude as the box diagram. In addition, we put an upper bound \Delta m_D^{LDR} \leq 5 \times \Delta m_D^{box} on a long-distance resonant contribution induced by the penguin mixing.
引用
@article{arxiv.hep-ph/9712279,
title = {Dipenguin-like contributions to D0 - anti-D0 mixing},
author = {Alexey A. Petrov},
journal= {arXiv preprint arXiv:hep-ph/9712279},
year = {2009}
}
备注
4 pages, 1 figure; to appear in the proceedings of HADRON'97, BNL, August 1997; preprint number is added