Improved Measurement of the CKM Angle alpha Using B0 to rho+rho- Decays.
- SLAC
We present results from an analysis of B{sup 0} ({bar B}{sup 0}) {yields} {rho}{sup +}{rho}{sup -} using 232 million {Upsilon}(4S) {yields} B{bar B} decays collected with the BABAR detector at the PEP-II asymmetric-energy B Factory at SLAC. We measure the longitudinal polarization fraction f{sub L} = 0.978 {+-} 0.014(stat){sub -0.029}{sup +0.021}(syst) and the CP-violating parameters S{sub L} = -0.33 {+-} 0.24(stat){sub -0.14}{sup +0.08}(syst) and C{sub L} = -0.03 {+-} 0.18(stat) {+-} 0.09(syst). Using an isospin analysis of B {yields} {rho}{rho} decays we determine the unitarity triangle {alpha}. The solution compatible with the Standard Model is {alpha} = (100 {+-} 13){sup o}.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC), Menlo Park, CA
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 839874
- Report Number(s):
- SLAC-PUB-11081
- Country of Publication:
- United States
- Language:
- English
Similar Records
Improved Measurement of the Cabibbo-Kobayashi-Maskawa Angle {alpha} Using B{sup 0}(B){yields}{rho}{sup +}{rho}{sup -} Decays
Measurement of the CKM Angle Alpha at the BABAR Detector Using B Meson Decays to Rho Final States
Study of the Decay B0 (anti-B0) ->rho+rho- and Constraints on the CKM Angle Alpha
Journal Article
·
Fri Jul 22 00:00:00 EDT 2005
· Physical Review Letters
·
OSTI ID:20696469
Measurement of the CKM Angle Alpha at the BABAR Detector Using B Meson Decays to Rho Final States
Technical Report
·
Mon Oct 16 00:00:00 EDT 2006
·
OSTI ID:893773
Study of the Decay B0 (anti-B0) ->rho+rho- and Constraints on the CKM Angle Alpha
Technical Report
·
Fri Apr 23 00:00:00 EDT 2004
·
OSTI ID:826858