Size of direct CP violation in singly Cabibbo-suppressed D decays

By J. Brod, A. Kagan, Jure Zupan. 2011

135 citations recorded by the source corpus.

The first experimental evidence for direct CP violation in charm-quark decays has recently been presented by the LHCb collaboration in the difference between the D -> K+ K- and D -> pi+ pi- time-integrated CP asymmetries. We estimate the size of the effects that can be expected within the Standard Model and find that at leading order in 1/mc they are an order of magnitude smaller. However, tree-level annihilation type amplitudes are known to be large experimentally. This implies that certain formally 1/mc-suppressed penguin amplitudes could plausibly account for the LHCb measurement. Simultaneously, the flavor-breaking parts of these amplitudes could explain the large difference between the D -> K+ K- and D -> pi+ pi- decay rates.

Subfields: Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/074caf557995b9d2c55eb90c7de4d2e9713a90db

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

In Nuclear and High Energy Physics

Citations in the corpus

Implications of LHCb measurements and future prospects - eScholarship (2013, background): “[460] employs the one-gluon exchange approximation.”
Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, result): “2% [238], in accordance with the current measurements.”