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del Amo Sanchez, P.; Lees, J.P.; Poireau, V.; Prencipe, E.; Tisserand, V.; Garra Tico, J.; Grauges, E.; Martinelli, M.; Palano, A.; Pappagallo, M.; Eigen, G.; Stugu, B.; Sun, L.; Battaglia, M.; Brown, D.N.; Hooberman, B.; Kerth, L.T.; Kolomensky, Yu. G.; Lynch, G.; Osipenkov, I.L.; Tanabe, T.; Hawkes, C.M.; Watson, A.T.; Koch, H.; Schroeder, T.; Asgeirsson, D.J.; Hearty, C.; Mattison, T.S.; Mckenna, J.A.; Khan, A.; Randle-Conde, A.; Blinov, V.E.; Buzykaev, A.R.; Druzhinin, V.P.; Golubev, V.B.; Onuchin, A.P.; Serednyakov, S.I.; Skovpen, Yu. I.; Solodov, E.P.; Todyshev, K. Yu; Yushkov, A.N.; Bondioli, M.; Curry, S.; Kirkby, D.; Lankford, A.J.; Mandelkern, M.; Martin, E.C.; Stoker, D.P.; Atmacan, H.; Gary, J.W.; Liu, F.; Long, O.; Vitug, G.M.; Campagnari, C.; Hong, T.M.; Kovalskyi, D.; Richman, J.D.; Eisner, A.M.; Heusch, C.A.; Kroseberg, J.; Lockman, W.S.; Martinez, A.J.; Schalk, T.; Schumm, B.A.; Seiden, A.; Winstrom, L.O.; Cheng, C.H.; Doll, D.A.; Echenard, B.; Hitlin, D.G.; Ongmongkolkul, P.; Porter, F.C.; Rakitin, A.Y.; Andreassen, R.; Dubrovin, M.S.; Mancinelli, G.; Meadows, B.T.; Sokoloff, M.D.; Bloom, P.C.; Ford, W.T.; Gaz, A.; Hirschauer, J.F.; Nagel, M.; Nauenberg, U.; Smith, J.G.; Wagner, S.R.; Ayad, R.; Toki, W.H.; Karbach, T.M.; Merkel, J.; Petzold, A.; Spaan, B.; Wacker, K.; Kobel, M.J.; Schubert, K.R.; Schwierz, R.; Bernard, D.; Verderi, M.; Clark, P.J.; Playfer, S.
Physical review letters, 2010, Volume: 105Journal Article
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 $B^\mp \to D K^\mp$, $B^\mp \to D^{*} K^\mp$ with $D^* \to D \pi^0,D \gamma$, and $B^\mp \to D K^{*\mp}$ with $K^{*\mp} \to K_S^0 \pi^\mp$, using 468 million $B\bar{B}$ pairs collected by the BABAR detector at the PEP-II asymmetric-energy $e^+e^-$ collider at SLAC. We measure $\gamma=(68 \pm 14 \pm 4 \pm 3)^\circ$ ({\rm mod $180^\circ$}), 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.
