We have searched for D-0-(D) over bar (0) mixing in D{*}(+)->pi D-+(0) decays with D-0 -> K-({*}())e nu in a sample of e(+)e(-)-> c (c) over bar events produced near 10.58 GeV. The charge of the slow pion from charged D{*} decay tags the charm flavor at production, and it is required to be consistent with the flavor of a fully reconstructed second charm decay in the same event. We observe 3 mixed candidates compared to 2.85 background events expected from simulation. We ascribe a 50\% systematic uncertainty to this expected background rate. We find a central value for the mixing rate of 0.4x10(-4). Using a frequentist method, we set corresponding 68\% and 90\% confidence intervals at (-5.6,7.4)x10(-4) and (-13,12)x10(-4), respectively.

Search for D-0-(D-0)over bar mixing using doubly flavor tagged semileptonic decay modes

BIANCHI, Fabrizio;GAMBA, Diego;
2007-01-01

Abstract

We have searched for D-0-(D) over bar (0) mixing in D{*}(+)->pi D-+(0) decays with D-0 -> K-({*}())e nu in a sample of e(+)e(-)-> c (c) over bar events produced near 10.58 GeV. The charge of the slow pion from charged D{*} decay tags the charm flavor at production, and it is required to be consistent with the flavor of a fully reconstructed second charm decay in the same event. We observe 3 mixed candidates compared to 2.85 background events expected from simulation. We ascribe a 50\% systematic uncertainty to this expected background rate. We find a central value for the mixing rate of 0.4x10(-4). Using a frequentist method, we set corresponding 68\% and 90\% confidence intervals at (-5.6,7.4)x10(-4) and (-13,12)x10(-4), respectively.
2007
76
014018
014025
B. Aubert; M. Bona; D. Boutigny; Y. Karyotakis; J. P. Lees; V. Poireau; X. Prudent; V. Tisserand; A. Zghiche; J. Garra Tico; E. Grauges; L. Lopez; A. ...espandi
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/42944
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact