Measurement of CP violation in the D⁰ → π⁺π^- at CDF

by Michael J. Morello (FERMILAB)

Tuesday 30 Nov 2010, 11:00 → 12:00 Europe/Zurich

500/1-001 - Main Auditorium (CERN)

I present a measurement of the CP violating asymmetry in D⁰ → π⁺π^- decays using approximately 215,000 decays reconstructed in about 5.94fb^-1 of CDF data. We use the strong D^*+ → D⁰ π⁺ decay ("D^* tag") to identify the flavor of the charmed meson at production time and exploit CP-conserving strong c c-bar pair-production in p p-bar collisions. Higher statistic samples of Cabibbo-favored D⁰ →K^- π⁺ decays with and without D^* tag are used to highly suppress systematic uncertainties due to detector effects. The result, at the per mil level, is the world's most precise measurement to date.

Joint EP/PP Seminar http://smaria.home.cern.ch/smaria/ppep/ppep.htm

Poster posterPrintingPDF.pdf

Slides morello_CERN_final.pdf