Narrow Results

Mixing of the pseudoscalar mesons is discussed in the quark-flavor basis. The divergences of the axial vector currents which embody the axial vector anomaly, combined with the assumption that the decay constants follow the pattern of particle state mixing in that basis, determine the mixing parameters for given masses of the physical mesons. These mixing parameters are compared with results from other work in some detail. Phenomenological applications of the quark-flavor mixing scheme are presented with particular interest focussed on isospin symmetry breaking which is generated by means of η and η′ admixtures to the pion. Consequences of a possible difference in the basis decay constants f_u and f_d for the strength of isospin symmetry breaking are also examined.

Here we consider the case of primary scalar unparticle contributions to B_{d, s} mixing. With particular emphasis on the impact of the recent hint of new physics in the measurement of the B_s mixing phase, ϕ_s, we determine the allowed parameter space and impose bounds on the unparticle couplings.

The recently observed mass difference of the mixing is used to predict the branching ratios of the rare top quark decays t → uγ and t → ug in a model-independent way using the effective Lagrangian approach. It is found that Br(t → uγ) < 4 × 10^-4 and Br(t → ug) < 2 × 10^-3, which may still be within reach of the LHC collider.

Charm physics has attracted increased attention after the first evidence for charm mixing was observed in 2007. The level of attention has risen sharply after LHCb reported first evidence for CP violation in the charm sector. Neither mixing nor CP violation have been established by a single unambiguous measurement to date. This review covers the status of mixing and CP violation measurements and comments on the challenges on the road ahead, both on the experimental and theoretical side, and on ways to tackle them.

Charm physics has played all along a central role in particle physics, however, the level of attention on it has tremendously increased in the last years because of the observation of "fast" flavor oscillations and because of very recent observed hints of CP-violation. While in the past these would have been unambiguously interpreted as signs of New Physics (NP), the revisitation of theoretical expectations, prompted by the latest experimental measurements, makes the picture not clear. This brief review covers the current status of CP-violating measurements in the system, both on the experimental and theoretical sides.

The establishment of mixing in 2007 generated a renaissance of interest in charm physics. The field gained even more strength with the commissioning of the LHC, which opened a new era of high sensitivity measurements. In this paper, we briefly review the basic formalism and experimental techniques related to charm mixing and to CP violation searches in D-meson decays and then report on recent experimental results obtained by the B-factories, CDF and LHCb.

We present a review of heavy flavor physics results from the CDF and DØ Collaborations operating at the Fermilab Tevatron Collider. A summary of results from Run 1 is included, but we concentrate on legacy results of charm and b physics from Run 2, including results up to Summer 2014.