Measurement of the Ds lifetime

E. M. Aitala*, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery, S. Banerjee, I. Bediaga, G. Blaylock, S. B. Bracker, P. R. Burchat, R. A. Burnstein, T. Carter, H. S. Carvalho, N. K. Copty, L. M. Cremaldi, C. Darling, K. Denisenko, A. Fernandez, G. F. Fox, P. GagnonC. Gobel, K. Gounder, A. M. Halling, G. Herrera, G. Hurvits, C. James, P. A. Kasper, S. Kwan, D. C. Langs, J. Leslie, B. Lundberg, S. MayTal-Beck, B. Meadows, J. R.T. De Mello Neto, D. Mihalcea, R. H. Milburn, J. M. De Miranda, A. Napier, A. Nguyen, A. B. D'Oliveira, K. O'Shaughnessy, K. C. Peng, L. P. Perera, M. V. Purohit, B. Quinn, S. Radeztsky, A. Rafatian, N. W. Reay, J. J. Reidy, A. C. Dos Reis, H. A. Rubin, D. A. Sanders, A. K.S. Santha, A. F.S. Santoro, A. J. Schwartz, M. Sheaff, R. A. Sidwell, A. J. Slaughter, M. D. Sokoloff, J. Solano, N. R. Stanton, R. J. Stefanski, K. Stenson, D. J. Summers, S. Takach, K. Thorne, A. K. Tripathi, S. Watanabe, R. Weiss-Babai, J. Wiener, N. Witchey, E. Wolin, S. M. Yang, D. Yi, S. Yoshida, R. Zaliznyak, C. Zhang

*Corresponding author for this work

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14 Scopus citations

Abstract

We report the results of a precise measurement of the Ds meson lifetime based on 1662 ± 56 fully reconstructed Ds → φπ decays, from the charm hadroproduction experiment E791 at Fermilab. Using an unbinned maximum likelihood fit, we measure the Ds lifetime to be 0.518 ± 0.014 ± 0.007 ps. The ratio of the measured Ds lifetime to the world average D0 lifetime [1] is 1.25 ± 0.04. This result differs from unity by six standard deviations, indicating significantly different lifetimes for the Ds and the D0.

Original languageEnglish
Pages (from-to)449-454
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume445
Issue number3-4
DOIs
StatePublished - 7 Jan 1999

Funding

FundersFunder number
Conselho Nacional de Desenvolvimento Cientı́fico e Technológio
Universities Research Association, Inc.
National Science Foundation
U.S. Department of Energy
United States-Israel Binational Science Foundation
Consejo Nacional de Ciencia y Tecnología
Israel Academy of Sciences and Humanities

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