Flavour Tagging in LHCb, Including Calibration and Control

Opposite-side flavour tagging of B mesons at the LHCb experiment

The calibration and performance of the opposite-side flavour tagging algorithms used for the measurements of time-dependent asymmetries at the LHCb experiment are described. The algorithms have been developed using simulated events and optimized and calibrated with B+→J/ψK+, B0→J/ψK∗0 and B0→D∗-μ+νμ decay modes with 0.37 fb-1 of data collected in pp collisions at [Formula: see text] during the ...

Flavor Tagging at Tevatron Incl. Calibration and Control

This report summarizes the flavor tagging techniques developed at the CDF and DØ experiments. Flavor tagging involves identification of the B meson flavor at production, whether its constituent is a quark or an anti-quark. It is crucial for measuring the oscillation frequency of neutral B mesons, both in the B 0 and B 0 s system. The two experiments have developed their unique approaches to fla...

Relic neutrino decoupling including flavour oscillations

In the early universe, neutrinos are slightly coupled when electron-positron pairs annihilate transferring their entropy to photons. This process originates non-thermal distortions on the neutrino spectra which depend on neutrino flavour, larger for νe than for νμ or ντ . We study the effect of three-neutrino flavour oscillations on the process of neutrino decoupling by solving the momentum-dep...

The demise of flavour tagging and its ∆t-dependence

In this work we discuss how the loss of particle-antiparticle identity due to CPT violation affects the observables in the decay of two neutral EPR-correlated B-mesons. We study this possible new effect in the context of equal-sign flavour specific decays and we find a considerable modification in the ∆t-dependence of the equal-sign dilepton charge asymmetry, Asl . Although the more important c...

4 4 b - flavour tagging in pp collisions