A measurement of lifetime differences in the neutral D-meson system

J. M. Link, V. S. Paolone, M. Reyes, P. M. Yager, J. C. Anjos, I. Bediaga, C. Göbel, J. Magnin, J. M. de Miranda, I. M. Pepe, A. C. dos Reis, F. R.A. Simão, M. A. Vale, S. Carrillo, E. Casimiro, H. Mendez, A. Sánchez-Hernández, C. Uribe, F. Vazquez, L. CinquiniJ. P. Cumalat, J. E. Ramirez, B. O'Reilly, E. W. Vaandering, J. N. Butler, H. W.K. Cheung, I. Gaines, P. H. Garbincius, L. A. Garren, E. Gottschalk, S. A. Gourlay, P. H. Kasper, A. E. Kreymer, R. Kutschke, S. Bianco, F. L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, D. Y. Kim, K. S. Park, A. Rahimi, J. Wiss, R. Gardner, Y. S. Chung, J. S. Kang, B. R. Ko, J. W. Kwak, K. B. Lee, S. S. Myung, H. Park, G. Alimonti, M. Boschini, D. Brambilla, B. Caccianiga, A. Calandrino, P. D'Angelo, M. Di Corato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, M. Mezzadri, L. Milazzo, L. Moroni, D. Pedrini, F. Prelz, M. Rovere, A. Sala, S. Sala, T. F. Davenport, V. Arena, G. Boca, G. Bonomi, G. Gianini, G. Liguori, M. Merlo, D. Pantea, S. P. Ratti, C. Riccardi, P. Torre, L. Viola, P. Vitulo, H. Hernandez, A. M. Lopez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, J. Quinones, C. Rivera, Y. Zhang, N. Copty, M. Purohit, J. R. Wilson, K. Cho, T. Handler, D. Engh, W. E. Johns, M. Hosack, M. S. Nehring, M. Sales, P. D. Sheldon, K. Stenson, M. S. Webster, M. Sheaff, Y. J. Kwon

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Abstract

Using a high statistics sample of photoproduced charm particles from the FOCUS experiment at Fermilab, we compare the lifetimes of neutral D mesons decaying via D0 → K- π+ and K-K+ to measure the lifetime differences between CP even and CP odd final states. These measurements bear on the phenomenology of D0 -D̄0 mixing. If the D0 → K- π+ is an equal mixture of CP even and CP odd eigenstates, we measure y(CP) = (Γ(CP even) - Λ(CP odd))/(Λ(CP even)+ Λ(CP odd)) = 0.0342 ± 0.0139 ± 0.0074. (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)62-70
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume485
Issue number1-3
DOIs
Publication statusPublished - 2000 Jul 13

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Link, J. M., Paolone, V. S., Reyes, M., Yager, P. M., Anjos, J. C., Bediaga, I., Göbel, C., Magnin, J., de Miranda, J. M., Pepe, I. M., dos Reis, A. C., Simão, F. R. A., Vale, M. A., Carrillo, S., Casimiro, E., Mendez, H., Sánchez-Hernández, A., Uribe, C., Vazquez, F., ... Kwon, Y. J. (2000). A measurement of lifetime differences in the neutral D-meson system. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 485(1-3), 62-70. https://doi.org/10.1016/S0370-2693(00)00694-8