Publications

Drift Chamber

(1999 - now)

Physics Analysis

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

BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 100, 171803 (2008).

Measurement of CP observables in B⁺ → D_CP K⁺ decays
BaBar Collaboration, B. Aubert et al., Phys.Rev. D77, 111102 (2008).

Measurement of the Time-Dependent CP Asymmetry in B⁰→ D^(*)_CPh⁰ Decays

BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 99, 081801 (2007).

Measurement of B⁰→ D^(*)0 K^(*)0 Branching Fractions
BaBar Collaboration, B. Aubert et al., Phys.Rev. D74, 031101 (2006).

Search for the Rare Decays B⁰→ D_s^(*)+ a^-_0/2
BaBar Collaboration, B. Aubert et al., Phys.Rev. D73, 071103 (2006).

Measurement of the Ratio of Decay Amplitudes for B⁰→J/y K^*0 and B⁰→J/y K^*0
BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 93, 081801 (2004).

Measurement of the CP Asymmetry Amplitude sin 2b with B⁰ Mesons
BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 89, 201802 (2002).
 

A Study of Time-Dependent CP-Violating Asymmetries and Flavor Oscillations in Neutral B Decays at the Upsilon(4S)
BaBar Collaboration, B. Aubert et al., Phys.Rev. D66, 032003 (2002).

Measurement of B⁰-B⁰ Flavor Oscillations in Hadronic B⁰ Decays
BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 88, 221802 (2002).

Observation of CP Violation in the B⁰Meson System
BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 87, 091801 (2001).

Measurement of CP violating Asymmetries in B⁰Decays to CP Eigenstates
BaBar Collaboration, B. Aubert et al., Phys.Rev.Lett. 86, 2515 (2001).
 

BaBar Drift Chamber (DCH)

Other work on BaBar

Other research activities