Precision Measurement of CP Violation in D0->pi+pi- at CDF
Angelo Di Canto (for the CDF Collaboration)
TL;DR
This paper presents a highly precise measurement of CP violation in D0->pi+pi- decays using CDF data, employing D* tagging and control samples to minimize systematic uncertainties.
Contribution
It provides the most precise measurement of CP violation in D0->pi+pi- to date, utilizing innovative tagging and systematic control methods.
Findings
First measurement with this precision
Effective suppression of detector systematic uncertainties
Consistent with CP conservation
Abstract
We report a preliminary measurement of the CP violating asymmetry in D0->pi+pi- using approximately 215,000 decays reconstructed in about 5.94/fb of CDF data. We use the strong D*+->D0pi+ decay ("D* tag") to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c-cbar pair-production in p-pbar collisions. Higher statistic samples of Cabibbo-favored D0->K-pi+ decays with and without D* tag are used to highly suppress systematic uncertainties due to detector effects. The result is the world's most precise measurement to date.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions · Neutrino Physics Research