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EnglishNew physics in the chromomagnetic flavor changing transition s ! dg0 can avoid the strong Glashow- Iliopoulos-Maiani suppression of the standard model and lead to large contributions to CP-violating observables, in particular to the 0 parameter, that we address here. We discuss the case of the left-right symmetric models, where this contribution implies bounds on the phases of the right-handed quark mixing matrix, or in generic models with large phases a strong bound on the left-right symmetry scale. To the leading order, a numeric formula for 0 as a function of the short-distance coefficients for a wide class of models of new physics is given.
New physics in the chromomagnetic flavor changing transition s→dg∗ can avoid the strong Glashow-Iliopoulos-Maiani suppression of the standard model and lead to large contributions to CP-violating observables, in particular to the ϵ′ parameter, that we address here. We discuss the case of the left-right symmetric models, where this contribution implies bounds on the phases of the right-handed quark mixing matrix, or in generic models with large phases a strong bound on the left-right symmetry scale. To the leading order, a numeric formula for ϵ′ as a function of the short-distance coefficients for a wide class of models of new physics is given.
| Titolo: | New physics in ϵ′ from gluomagnetic contributions and limits on Left-Right symmetry |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Rivista: | |
| Abstract: | New physics in the chromomagnetic flavor changing transition s ! dg0 can avoid the strong Glashow- Iliopoulos-Maiani suppression of the standard model and lead to large contributions to CP-violating observables, in particular to the 0 parameter, that we address here. We discuss the case of the left-right symmetric models, where this contribution implies bounds on the phases of the right-handed quark mixing matrix, or in generic models with large phases a strong bound on the left-right symmetry scale. To the leading order, a numeric formula for 0 as a function of the short-distance coefficients for a wide class of models of new physics is given. |
| Handle: | http://hdl.handle.net/11368/2900779 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevD.86.095013 |
| URL: | http://dx.doi.org/10.1103/PhysRevD.86.095013 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |