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- W877130596 abstract "The decay K{sup +}{r_arrow}{pi}{sup +}{nu}{bar {nu}} has been observed for the first time. The E787 experiment has presented evidence for the K{sup +}{r_arrow}{pi}{sup +}{nu}{bar {nu}} decay, based on the observation of a single clean event from data collected during the 1995 run of the AGS (Alternating Gradient Synchrotron at Brookhaven National Laboratory). The branching ratio indicated by this observation, B(K{sup +}{r_arrow}{pi}{sup +}{nu}{bar {nu}})=4.2{sub {minus}3.5}{sup +9.7}{times}10{sup {minus}10}, is consistent with the Standard Model expectation although the central experimental value is four times larger. The final E787 data sample, from the 1995{endash}99 runs, should reach a sensitivity of about eight times that of the 1995 run alone. A new experiment, E949, has been approved to run, starting in the year 2000, and is expected to achieve a sensitivity of more than an order of magnitude below the prediction of the Standard Model. {copyright} {ital 1999 American Institute of Physics.}" @default.
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- W877130596 date "1999-02-01" @default.
- W877130596 modified "2023-09-24" @default.
- W877130596 title "Evidence for K{sup +}{r_arrow}{pi}{sup +}{nu}{bar {nu}}" @default.
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