| Autor: |
H K, Park, R A, Burnstein, A, Chakravorty, A, Chan, Y C, Chen, W S, Choong, K, Clark, E C, Dukes, C, Durandet, J, Felix, G, Gidal, P, Gu, H R, Gustafson, C, Ho, T, Holmstrom, M, Huang, C, James, C M, Jenkins, D M, Kaplan, L M, Lederman, N, Leros, M J, Longo, F, Lopez, L, Lu, W, Luebke, K B, Luk, K S, Nelson, J P, Perroud, D, Rajaram, H A, Rubin, P K, Teng, J, Volk, C, White, S, White, P, Zyla |
| Rok vydání: |
2001 |
| Zdroj: |
Physical review letters. 88(11) |
| ISSN: |
0031-9007 |
| Popis: |
Using data collected with the HyperCP (E871) spectrometer during the 1997 fixed-target run at Fermilab, we report the first observation of the decay K---pi(-)mu(+)mu(-) and new measurements of the branching ratios for K+/---pi(+/-)mu(+)mu(-). By combining the branching ratios for the decays K+--pi(+)mu(+)mu(-) and K---pi(-)mu(+)mu(-), we measure Gamma(K+/---pi(+/-)mu(+)mu(-))/Gamma(K+/---all) = (9.8+/-1.0+/-0.5)x10(-8). The CP asymmetry between the rates of the two decay modes is [Gamma(K+--pi(+)mu(+)mu(-))-Gamma(K---pi(-)mu(+)mu(-))]/[Gamma(K+--pi(+)mu(+)mu(-))+Gamma(K---pi(-)mu(+)mu(-))] = -0.02+/-0.11+/-0.04. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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