Abstract The Physics Beyond Colliders initiative is an exploratory study aimed at exploiting
the full scientific potential of the CERN's accelerator complex and scientific infrastructures …

Motivated by the success of the flavour physics programme carried out over the last decade
at the Large Hadron Collider (LHC), we characterize in detail the physics potential of its High …

A search for the rare decay KL→ π 0 ν ν¯ was performed. With the data collected in 2015,
corresponding to 2.2× 10 19 protons on target, a single event sensitivity of (1.30±0.0 1 …

In 1988 the NA31 experiment presented the first evidence of direct CP violation in the decay
amplitudes. A clear signal with a statistical significance was later established with the full …

We consider a simple extension of the Standard Model (SM) by a complex scalar doublet
and a singlet along with three sterile neutrinos. The sterile neutrinos mix with the SM …

A bstract The K→ μ+ μ− decay is often considered to be uninformative of fundamental theory
parameters since the decay is polluted by long-distance hadronic effects. We demonstrate …

Recently, the standard model predictions for the B-meson hadronic decays, B¯ 0→ D (*)+ K-
and B¯ s 0→ D s (*)+ π-, have been updated based on the QCD factorization approach. This …

A timely and long-term programme of kaon decay measurements at an unprecedented level
of precision is presented, leveraging the capabilities of the CERN Super Proton Synchrotron …

A timely and long-term programme of kaon decay measurements at a new level of precision
is presented, leveraging the capabilities of the CERN Super Proton Synchrotron (SPS). The …

We find that the phase appearing in the unitarity relation between B (KL→ µ+ µ−) and B
(KL→ γγ) is equal to the phase shift in the interference term of the timedependent K→ µ+ µ …