Using data from the FOCUS (E831) experiment, we have searched for T violation in charm meson decays using the four-body decay channels D-0 -> K(-)K(+)pi(-)pi(+), D+ -> K(S)(0)K(+)pi(-)pi(+), and D-s(+) -> K(S)(0)K(+)pi(-)pi(+). The T violation asymmetry is obtained using triple-product correlations and assuming the validity of the CPT theorem. We find the asymmetry values to be A(Tviol)(D-0) = 0.010 +/- 0.057(stat.) +/- 0.037(syst.), A(Tviol)(D+) = 0.023 +/- 0.062(stat.) +/- 0.022(syst.), and A(Tviol)(D-s(+)) = -0.036 +/- 0.067(stat.) +/- 0.023(syst.). Each measurement is consistent with no T violation. New measurements of the CP asymmetries for some of these decay modes are also presented.
Search for T violation in charm meson decays / J.M. Link, P.M. Yager, J.C. Anjos, I. Bediaga, C. Castromonte, A.A. Machado, J. Magnin, A. Massafferri, J.M. de Miranda, I.M. Pepe, E. Polycarpo, A.C. dos Reis, S. Carrillo, E. Casimiro, E. Cuautle, A. Sanchez-Hernandez, C. Uribe, F. Vazquez, L. Agostino, L. Cinquini, J.P. Cumalat, B. O'Reilly, I. Segoni, K. Stenson, J.N. Butler, Falso Cheung, G. Chiodini, I. Gaines, P.H. Garbincius, L.A. Garren, E. Gottschalk, P.H. Kasper, A.E. Kreymer, R. Kutschke, M. Wang, L. Benussi, M. Bertani, S. Bianco, F.L. Fabbri, S. Pacetti, A. Zallo, M. Reyes, C. Cawlfield, D.Y. Kim, A. Rahimi, J. Wiss, R. Gardner, A. Kryemadhi, Y.S. Chung, J.S. Kang, B.R. Ko, J.W. Kwak, K.B. Lee, K. Cho, H. Park, G. Alimonti, S. Barberis, M. Boschini, A. Cerutti, P. D'Angelo, M. DiCorato, P. Dini, L. Edera, S. Erba, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Moroni, D. Pedrini, C. Pontoglio, F. Prelz, M. Rovere, S. Sala, T.F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, D.L. Pegna, M.M. Merlo, D. Pantea, S.P. Ratti, C. Riccardi, P. Vitulo, C. Gobel, H. Hernandez, A.M. Lopez, H. Mendez, A. Paris, J. Quinones, J.E. Ramirez, Y. Zhang, J.R. Wilson, T. Handler, R. Mitchell, D. Engh, M. Hosack, W.E. Johns, E. Luiggi, J.E. Moore, M. Nehring, P.D. Sheldon, E.W. Vaandering, M. Webster, M. Sheaff. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 622:3-4(2005), pp. 239-248.
Search for T violation in charm meson decays
F. Leveraro;G. Gianini;
2005
Abstract
Using data from the FOCUS (E831) experiment, we have searched for T violation in charm meson decays using the four-body decay channels D-0 -> K(-)K(+)pi(-)pi(+), D+ -> K(S)(0)K(+)pi(-)pi(+), and D-s(+) -> K(S)(0)K(+)pi(-)pi(+). The T violation asymmetry is obtained using triple-product correlations and assuming the validity of the CPT theorem. We find the asymmetry values to be A(Tviol)(D-0) = 0.010 +/- 0.057(stat.) +/- 0.037(syst.), A(Tviol)(D+) = 0.023 +/- 0.062(stat.) +/- 0.022(syst.), and A(Tviol)(D-s(+)) = -0.036 +/- 0.067(stat.) +/- 0.023(syst.). Each measurement is consistent with no T violation. New measurements of the CP asymmetries for some of these decay modes are also presented.
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