(1999 - now)
I study the decays of heavy, short-lived particles, called B mesons, with the BaBar experiment. These B mesons are produced in energetic electron-positron collisions at the Upsilon (4S) resonance (10.6 GeV CMS energy) by the PEP-II storage ring at the Stanford Linear Accelerator Center (SLAC).
I am particularly interested in a phenomenon called CP violation. CP violation manifests itself in different decay rates for B and B mesons. CP violation is necessary so that a matter anti-matter symmetric universe (at the time of the big bang) can turn into an almost-only-matter universe (today). The Standard Model of electro-weak interactions describes CP violation, but the predicted size of CP violation cannot account for the observed matter in the universe. The Standard Model predicts large CP violating effects in B meson decays. CP violation measurements in B decays could show discrepancies with the Standard Model predictions and provide first evidence for new physics beyond the Standard Model.
Publications to which my group and I provided significant contributions
Observation of tree-level B decays with s anti-s production from gluon radiation
of CP observables in B+
Measurement of the Time-Dependent CP Asymmetry in B0→ D(*)CPh0 Decays
BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 99, 081801 (2007).
Search for the
Measurement of the
Ratio of Decay Amplitudes for B0→J/y
Measurement of the CP Asymmetry
Amplitude sin 2b with B0 Mesons
A Study of
Time-Dependent CP-Violating Asymmetries and Flavor Oscillations in Neutral
B Decays at the Upsilon(4S)
Measurement of CP violating
Asymmetries in B0Decays
to CP Eigenstates
BaBar Drift Chamber (DCH)
Other work on BaBar
Other research activities