Improved Measurement of CP Observables in B- to D0_CP K- Decays
Author | : |
Publisher | : |
Total Pages | : 8 |
Release | : 2008 |
ISBN-10 | : OCLC:893408291 |
ISBN-13 | : |
Rating | : 4/5 ( Downloads) |
Download or read book Improved Measurement of CP Observables in B- to D0_CP K- Decays written by and published by . This book was released on 2008 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a study of the decay B− 2!D{sub (CP)}°K− and its charge conjugate, where D{sub (CP)}° is reconstructed in both a non-CP flavor eigenstate and in CP (CP-even and CP-odd) eigenstates, based on a sample of 382 million [Upsilon](4S) 2!B{bar B} decays collected with the BABAR detector at the PEP-II ee− storage ring. We measure the direct CP asymmetries A{sub CP±} and the ratios of the branching fractions R{sub CP±}: A{sub CP+} = 0.27 ± 0.09(stat) ± 0.04(syst), A{sub CP-} = -0.09 ± 0.09(stat) ± 0.02(syst), R{sub CP+} = 1.06 ± 0.10(stat) ± 0.05(syst), R{sub CP-} = 1.03 {+-} 0.10(stat) {+-} 0.05(syst). These results will help to better constrain the gamma phase parameter of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.