Published in:

Physical Review Letters 99,19 (2007)

Abstract

Using a 281 pb(-1) data sample collected at the psi(3770) with the CLEO-c detector, we present the first absolute branching fraction measurement of the decay D-0 -> K-pi(+)pi(-)e(+)nu(e) at a statistical significance of about 4.0 standard deviations. We find 10 candidates consistent with the decay D-0 -> K-pi(+)pi(-)e(+)nu(e). The probability that a background fluctuation accounts for this signal is less than 4.1x10(-5). We find B(D-0 -> K-pi(+)pi(-)e(+)nu(e))=[2.8(-1.1)(+1.4)(stat)+/- 0.3(syst)]x10(-4). By restricting the invariant mass of the hadronic system to be consistent with K-1(1270), we obtain the product of branching fractions B(D-0 -> K-1(-)(1270)e(+)nu(e))xB(K-1(-)(1270)-> K-pi(+)pi(-))=[2.5(-1.0)(+1.3)(stat)+/- 0.2(syst)]x10(-4). Using B(K-1(-)(1270)-> K-pi(+)pi(-))=(33 +/- 3)%, we obtain B(D-0 -> K-1(-)(1270)e(+)nu(e))=[7.6(-3.0)(+4.1)(stat)+/- 0.6(syst)+/- 0.7]x10(-4). The last error accounts for the uncertainties in the measured K-1(-)(1270)-> K-pi(+)pi(-) branching fractions.

Keywords

Physics, Multidisciplinary

Date of this Version

January 2007

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.