Year: 2001
Type: article
Abstract: We propose a model of soft $\mathrm{CP}$ violation that evades the strong $\mathrm{CP}$ problem and can describe observed $\mathrm{CP}$ violation in the neutral kaon sector, both direct and indirect. Our model requires two ``duark'' mesons carrying quark number two that have complex ( $\mathrm{CP}$-violating) bare masses and are coupled to quark pairs. Aside from the existence of these potentially observable new particles with masses of several hundred GeV, we predict a flat unitarity triangle (i.e., no observable direct $\mathrm{CP}$ violation in the $B$-meson sector) and a possibly anomalous branching ratio for the decay mode ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}+\overline{\ensuremath{\nu}}\ensuremath{\nu}$.
Source: Physical Review Letters
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2000542167