Recent Searches for Exotic Physics at the BaBar/PEP-II B-factory

TL;DR

This paper reports on recent searches for exotic physics phenomena at the BaBar/PEP-II B-factory, including CPT violation, lepton-flavor violation, and low-mass Higgs bosons, with no significant signals found but setting upper limits.

Contribution

It presents new experimental searches for exotic physics in various decay channels at the B-factory, expanding the scope of constraints on new physics models.

Findings

No evidence for CPT violation in B mixing.

No evidence for lepton-flavor-violating tau decays.

No evidence for a low-mass Higgs boson in Upsilon(3S) decays.

Abstract

I present three recent results from searches for exotic physics at the BaBar/PEP-II B-factory. These results span many of the samples produced at the B-factory, including B mesons, tau leptons, and Upsilon(3S) mesons. We have searched for CPT-violation in B mixing and find no significant deviation from the no-violation hypothesis. We have also searched for lepton-flavor-violating decays of the tau using tau- -> omega l- and tau- -> l+ l- l+ and their charge conjugates. We find no evidence for these processes and set upper limits on their branching fractions. Finally, we have searched for a low-mass Higgs boson in the decay Upsilon(3S) -> gamma A0, where the Higgs decays invisibly. We find no evidence for such a decay and set upper limits across a range of possible Higgs masses.