We report on a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase gamma through a Dalitz analysis of neutral D decays to K(S)(0)pi(-)pi(+) in the processes B-/+-> (DK-/+)-K-(*), D-*-> D pi(0), D gamma. Using a sample of 227x10(6) BB pairs collected by the BABAR detector, we measure the amplitude ratios r(B)=0.12 +/- 0.08 +/- 0.03 +/- 0.04 and r(B)(*)=0.17 +/- 0.10 +/- 0.03 +/- 0.03, the relative strong phases delta(B)=(104 +/- 45(-21-24)(+17+16))degrees and delta(B)(*)=(-64 +/- 41(-12)(+14)+/- 15)degrees between the amplitudes A(B--> (DK-)-K-(*)0) and A(B--> (DK-)-K-(*)0), and gamma=(70 +/- 31(-10-11)(+12+14))degrees. The first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the Dalitz model uncertainty. The results for the strong and weak phases have a twofold ambiguity.
Measurement of the Cabibbo-Kobayashi-Maskawa angle gamma in B--/+->(DK -/+)-K-(*) decays with a Dalitz analysis of D -> K-S(0)pi(-)pi(+) / B. Aubert, R. Barate, D. Boutigny, F. Couderc, Y. Karyotakis, J.P. Lees, V. Poireau, V. Tisserand, A. Zghiche, E. Grauges, A. Palano, M. Pappagallo, A. Pompili, J.C. Chen, N.D. Qi, G. Rong, P. Wang, Y.S. Zhu, G. Eigen, I. Ofte, B. Stugu, G.S. Abrams, M. Battaglia, A.W. Borgland, A.B. Breon, D.N. Brown, J. Button-Shafer, R.N. Cahn, E. Charles, C.T. Day, M.S. Gill, A.V. Gritsan, Y. Groysman, R.G. Jacobsen, R.W. Kadel, J. Kadyk, L.T. Kerth, Y.G. Kolomensky, G. Kukartsev, G. Lynch, L.M. Mir, P.J. Oddone, T.J. Orimoto, M. Pripstein, N.A. Roe, M.T. Ronan, W.A. Wenzel, M. Barrett, K.E. Ford, T.J. Harrison, A.J. Hart, C.M. Hawkes, S.E. Morgan, A.T. Watson, M. Fritsch, K. Goetzen, T. Held, H. Koch, B. Lewandowski, M. Pelizaeus, K. Peters, T. Schroeder, M. Steinke, J.T. Boyd, J.P. Burke, N. Chevalier, W.N. Cottingham, M.P. Kelly, T. Cuhadar-Donszelmann, C. 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Neal. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 95:12(2005). [10.1103/PhysRevLett.95.121802]
Measurement of the Cabibbo-Kobayashi-Maskawa angle gamma in B--/+->(DK -/+)-K-(*) decays with a Dalitz analysis of D -> K-S(0)pi(-)pi(+)
A. Lazzaro;V. Lombardo;F. Palombo;N. Neri;
2005
Abstract
We report on a measurement of the Cabibbo-Kobayashi-Maskawa CP-violating phase gamma through a Dalitz analysis of neutral D decays to K(S)(0)pi(-)pi(+) in the processes B-/+-> (DK-/+)-K-(*), D-*-> D pi(0), D gamma. Using a sample of 227x10(6) BB pairs collected by the BABAR detector, we measure the amplitude ratios r(B)=0.12 +/- 0.08 +/- 0.03 +/- 0.04 and r(B)(*)=0.17 +/- 0.10 +/- 0.03 +/- 0.03, the relative strong phases delta(B)=(104 +/- 45(-21-24)(+17+16))degrees and delta(B)(*)=(-64 +/- 41(-12)(+14)+/- 15)degrees between the amplitudes A(B--> (DK-)-K-(*)0) and A(B--> (DK-)-K-(*)0), and gamma=(70 +/- 31(-10-11)(+12+14))degrees. The first error is statistical, the second is the experimental systematic uncertainty, and the third reflects the Dalitz model uncertainty. The results for the strong and weak phases have a twofold ambiguity.Pubblicazioni consigliate
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