Engineering topics

Gisbert, Hector

Publications and source records attributed to Gisbert, Hector.

2 records

DOE OSTI2020

Isospin-breaking contributions to ε '/ε

We present an updated analysis of isospin-violating corrections to ε '/ε in the framework of chiral perturbation theory, taking advantage of the currently improved knowledge on quark masses and nonperturbative parameters. The role of the different ingredients entering into the analysis is carefully assessed. Our final result is ${\Omega }_{\text{eff}}={0.110}_{-0.088}^{+0.090}$ [1].

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗

DOE OSTI2020

Theoretical status of ε '/ε

We briefly overview the historical controversy around Standard Model predictions of ε '/ε and clarify the underlying physics. A full update of this important observable is presented, with all known short- and long-distance contributions, including isospin-breaking corrections. The current Standard Model prediction, Re(ε '/ε) = (14 ± 5) centerdot 10 –4 [1, 2], is in excellent agreement with the experimentally measured value.

74 ATOMIC AND MOLECULAR PHYSICS↗