We present results of a search for CP violation in B0- B̄0 mixing with the BABAR detector. We select a sample of B0→D *-Xℓ+ν decays with a partial reconstruction method and use kaon tagging to assess the flavor of the other B meson in the event. We determine the CP violating asymmetry A CP≡[N(B0B0)-N(B̄0B̄0)]/[N(B0B0)+N(B̄0B̄0)]= (0.06±0.17-0.32+0.38)%, corresponding to ΔCP=1-|q/p|=(0. 29±0.84-1.61+1.88)×10-3.
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2013). Search for CP violation in B0- B̄0 mixing using partial reconstruction of B0→D* -Xℓ+νℓ and a Kaon Tag. PHYSICAL REVIEW LETTERS, 111(10) [10.1103/PhysRevLett.111.101802].
Search for CP violation in B0- B̄0 mixing using partial reconstruction of B0→D* -Xℓ+νℓ and a Kaon Tag
CARPINELLI, MassimoMembro del Collaboration Group
;
2013
Abstract
We present results of a search for CP violation in B0- B̄0 mixing with the BABAR detector. We select a sample of B0→D *-Xℓ+ν decays with a partial reconstruction method and use kaon tagging to assess the flavor of the other B meson in the event. We determine the CP violating asymmetry A CP≡[N(B0B0)-N(B̄0B̄0)]/[N(B0B0)+N(B̄0B̄0)]= (0.06±0.17-0.32+0.38)%, corresponding to ΔCP=1-|q/p|=(0. 29±0.84-1.61+1.88)×10-3.
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