Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle gamma with B(-/+) -> D(()*())K(()*()-/+) Decays RID C-5223-2009

We report the measurement of the Cabibbo-Kobayashi-Maskawa CP-violating angle gamma through a Dalitz plot analysis of neutral D-meson decays to K(S)(0)pi(+) pi(-) and K(S)(0) K(+) K(-) produced in the processes B(-/+) -> DK(-/+), B(-/+) -> D* K(-/+) with D* -> D pi(0), D gamma and B -/+ DK*-/+ with K*(-/+) -> K(S)(0)pi(-/+), using 468 million B (B) over bar pairs collected by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at SLAC. We measure gamma = (68 +/- 14 +/- 4 +/- 3)degrees (modulo 180 degrees), where the first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the uncertainty in the description of the neutral D decay amplitudes. This result is inconsistent with gamma = 0 ( no direct CP violation) with a significance of 3.5 standard deviations.



Titolo: Evidence for Direct CP Violation in the Measurement of the Cabbibo-Kobayashi-Maskawa Angle gamma with B(-/+) -> D(()*())K(()*()-/+) Decays RID C-5223-2009
Autori: 
LUSIANI, Alberto  
mostra contributor esterni 
Data di pubblicazione: 2010
Rivista: 
PHYSICAL REVIEW LETTERS  
Digital Object Identifier (DOI): http://dx.doi.org/10.1103/PhysRevLett.105.121801
Handle: http://hdl.handle.net/11384/4452
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