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(+)
ANDREOTTI, Mirco;CALABRESE, Roberto;CIBINETTO, Gianluigi;FRANCHINI, Paolo;LUPPI, Eleonora;NEGRINI, Matteo;PETRELLA, Antonio;PRENCIPE, Elisabetta;SANTORO, Valentina;
2008
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:
Non ci sono file associati a questo prodotto.
I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.