Data: |
2005 |
Resum: |
We present measurements of the B -> eta' K branching fractions:for B+ -> eta' K+ we measure also the time-integrated charge asymmetry Ach, and for B0 -> eta' K0S the time dependent CP-violation parameters S and C. The data sample corresponds to 232 million B Bbar pairs produced by e+ e- annihilation at the Upsilon(4S). The results are BF(B+ -> eta' K+) = (68. 9 +- 2. 0 +- 3. 2) * 10^-6, BF(B0 -> eta' K0) = (67. 4 +- 3. 3 +- 3. 2) * 10^-6, Ach = 0. 033 +- 0. 028 +- 0. 005, S=0. 30 +- 0. 14 +- 0. 02, C=-0. 21 +- 0. 10 +- 0. 02, where the first error is statistical and the second systematic. |
Drets: |
Tots els drets reservats. |
Llengua: |
Anglès |
Document: |
Article ; Versió publicada |
Matèria: |
B mesons ;
CP invariance ;
Meson hadronic decay |
Publicat a: |
Physical review letters, Vol. 94, Issue 19 (May 2005) , p. 191802-1-191802-7, ISSN 1079-7114 |