| Autor: |
M. Sivertz, K. A. Biery, M. V. Diwan, C. Mathiazhagan, J. Horvath, Stanley G. Wojcicki, P. Rubin, K. Arisaka, W. E. Slater, R. Cousins, D. L. Wagner, S. Axelrod, P. J. Riley, M. T. Witkowski, Hans Ziock, T. Kaarsberg, P. Knibbe, A. Schwartz, E. C. Milner, J. R. Kane, W. K. McFarlane, J. F. Ginkel, D. M. Lee, P. Buchholz, A. Yamashita, J. Margulies, A. P. Heinson, G.W. Hart, Karol Lang, W. R. Molzon, W. F. Vulcan, S. H. Kettell, R. J. Whyley, J. Urheim, R. J. McKee, D. A. Ouimette, A. D. Hancock, W. W. Kinnison, Gerald W Hoffmann, M. Eckhause, P. Melese, J. Belz, G. M. Irwin, C. J. Kenney, Y. Kuang, M. D. Chapman, G. H. Sanders, J. L. Ritchie, Robert E. Welsh, V. L. Highland, R. G. Winter, Jacobo Konigsberg, C. Guss, L. B. Auerbach |
| Rok vydání: |
1995 |
| Předmět: |
|
| Zdroj: |
Physical Review D. 51:985-1013 |
| ISSN: |
0556-2821 |
| Popis: |
We have measured the branching ratio for ${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$ using our full data set obtained during running periods in 1988, 1989, and 1990. The total number of ${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$ candidates after a background subtraction is 707, which represents the largest sample to date of this rare decay mode. Our result is B(${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$)=(6.86\ifmmode\pm\else\textpm\fi{}0.37)\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}9}$, which is consistent with earlier results and very near the unitarity bound. The upper limit on B(${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$) is used to set an upper limit on the real part of the amplitude scrA(${\mathit{K}}_{\mathit{L}}^{0}$\ensuremath{\rightarrow}${\mathrm{\ensuremath{\mu}}}^{+}$${\mathrm{\ensuremath{\mu}}}^{\mathrm{\ensuremath{-}}}$); this is subsequently used to constrain the top quark mass ${\mathit{m}}_{\mathit{t}}$ and the Wolfenstein parameter \ensuremath{\rho} of the CKM matrix. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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