TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Villanueva-Perez, P.
PY  - 2014
DA  - 2014//
TI  - Measurements of direct CP asymmetries in B -> X-s gamma decays using sum of exclusive decays
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 092001
EP  - 12pp
VL  - 90
IS  - 9
PB  - Amer Physical Soc
AB  - We measure the direct CP violation asymmetry, A(CP), in B -> X-s gamma and the isospin difference of the asymmetry, Delta A(CP), using 429 fb(-1) of data collected at Upsilon(4S) resonance with the BABAR detector at the PEP- II asymmetric- energy e(+)e(-) storage rings operating at the SLAC National Accelerator Laboratory. B mesons are reconstructed from ten charged B final states and six neutral B final states. We find A(CP) = +(1.7 +/- 1.9 +/- 1.0)%, which is in agreement with the Standard Model prediction and provides an improvement on the world average. Moreover, we report the first measurement of the difference between A(CP) for charged and neutral decay modes, Delta A(CP) = +(5.0 +/- 3.9 +/- 1.5)%. Using the value of Delta A(CP), we also provide 68% and 90% confidence intervals on the imaginary part of the ratio of theWilson coefficients corresponding to the chromomagnetic dipole and the electromagnetic dipole transitions.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1406.0534
UR  - https://doi.org/10.1103/PhysRevD.90.092001
DO  - 10.1103/PhysRevD.90.092001
LA  - English
N1  - WOS:000345173600001
ID  - BABARCollaborationLees_etal2014
ER  -