Search for New Physics in the B0s mixing phase at CDF

TL;DR

This paper reports the first measurement of CP-violation phase in B0s meson mixing at CDF, testing for signs of new physics beyond the Standard Model using flavor-tagged decay data.

Contribution

It presents the first measurement of the B0s mixing phase at CDF and extends the analysis to a larger dataset, improving the search for new physics signals.

Findings

No significant deviation from the Standard Model phase observed.

Results set constraints on new physics models affecting B0s mixing.

Future projections indicate increased sensitivity with more data.

Abstract

The Collider Detector at Fermilab (CDF) experiment performed the first measurement of the time-evolution of flavor-tagged B0s->J/psiphi decays, which probes mixing-induced CP-violation in the B0s sector. Any sizable deviation from zero of the phase beta_s, accessible through interference of the bbar\to cbar c sbar quark-level process accompanied or not by B0s-aB0s mixing, would be unambiguous indication of physics beyond the Standard Model. I report CDF results obtained in 1.35/fb, a recent extension to a larger dataset corresponding to 2.8/fb, and future projections.