BaBar

Physics Analysis

Publications

Drift Chamber

Other work


(1999 - now)

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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+ DCP K+ decays
BaBar Collaboration, B. Aubert et al., Phys.Rev. D77, 111102 (2008).

 

Measurement of the Time-Dependent CP Asymmetry in B0D(*)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→ Ds(*)+ a-0/2
BaBar Collaboration, B. Aubert et al., Phys.Rev. D73, 071103 (2006).

 

Measurement of the Ratio of Decay Amplitudes for B0J/y K*0 and B0J/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)

 

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DCH system co-manager (March 2003 - December 2006)

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DCH operations manager (2001)

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Time-to-distance calibration (1999 - now)

 

Other work on BaBar

 

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Physics Coordinator (2007-2008)

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Deputy Physics Coordinator (2006-2007)

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Co-convener of the BaBar sin2b working group (2002)

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Member of the BaBar statistics working group (2001 - now)

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Member of several analysis review committees

 

Other research activities

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Co-convener of Heavy Flavor Averaging Group (HFAG) (2005 - 2008)