We measure time-integrated CP-violating asymmetries of neutral charmed mesons in the modes D(0)-> K(-)K(+) and D(0)->pi(-)pi(+) with the highest precision to date by using D(0)-> K(-)pi(+) decays to correct detector asymmetries. An analysis of 385.8 fb(-1) of data collected with the BABAR detector yields values of a(CP)(KK)=(0.00 +/- 0.34(stat)+/- 0.13(syst))% and a(CP)(pi pi)=(-0.24 +/- 0.52(stat)+/- 0.22(syst))%, which agree with standard model predictions.
Search for CP violation in the decays D(0)-> K(-)K(+) and D(0)->pi(-)pi(+)
CALDERINI, GIOVANNI;ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;CERVELLI, ALBERTO;FORTI, FRANCESCO;GIORGI, MARCELLO;MARCHIORI, GIOVANNI;NERI, NICOLA;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2008-01-01
Abstract
We measure time-integrated CP-violating asymmetries of neutral charmed mesons in the modes D(0)-> K(-)K(+) and D(0)->pi(-)pi(+) with the highest precision to date by using D(0)-> K(-)pi(+) decays to correct detector asymmetries. An analysis of 385.8 fb(-1) of data collected with the BABAR detector yields values of a(CP)(KK)=(0.00 +/- 0.34(stat)+/- 0.13(syst))% and a(CP)(pi pi)=(-0.24 +/- 0.52(stat)+/- 0.22(syst))%, which agree with standard model predictions.File in questo prodotto:
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