Experiment E949 at Brookhaven National Laboratory has observed three new events consistent with the decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ in the pion momentum region $140l{P}_{\ensuremath{\pi}}l199\text{ }\text{ }\mathrm{MeV}/c$ in an exposure of $1.71\ifmmode\times\else\texttimes\fi{}{10}^{12}$ stopped kaons with an estimated total background of $0.93\ifmmode\pm\else\textpm\fi{}0.17(\mathrm{stat}{)}_{\ensuremath{-}0.24}^{+0.32}(\mathrm{syst})$ events. This brings the total number of observed ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}}$ events to seven. Combining this observation with previous results, assuming the pion spectrum predicted by the standard model, results in a branching ratio of $\mathcal{B}({K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}\ensuremath{\nu}\overline{\ensuremath{\nu}})=({1.73}_{\ensuremath{-}1.05}^{+1.15})\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$. An interpretation of the results for alternative models of the decay ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}+nothing$ is also presented.

Study of the decay K+→π+νν̄ in the momentum region 140<Pπ<199MeV/c

https://www.cns.s.u-tokyo.ac.jp/~shimoura/research/nuc_data/pdf/19.pdf

Energy levels of light nuclei A=11☆

An evaluation of A = 16-17 was published in Nuclear Physics A564 (1993), p. 1. This version of A = 17 differs from the published version in that we have corrected some errors discovered after the article went to press. The introductio n and introductory tables have been omitted from this manuscript. Reference key numbers have been changed to the NNDC/TUNL format.

Energy Levels of Light Nuclei A = 17

Nuclear Data Sheets for A=39

An evaluation of A =1 8-19 was published in Nuclear Physics A595 (1995), p. 1. This version of A =1 9differs from the published version in that we have corrected some errors discovered after the article went to press. It has also been slightly revised as of June 13, 2000 to include hyperlinks for references and tables. Figures have been omitted from this manuscript. Also, Reference key numbers are in the NNDC/TUNL format.

Energy Levels of Light Nuclei A =1 9

We have measured the inclusive production spectra of protons, deuterons and $\ensuremath{\alpha}$ particles following negative pion capture from rest in carbon, calcium, indium, and bismuth from low energies up to 55 MeV for protons and deuterons, and 30 MeV for $\ensuremath{\alpha}$ particles. The proton and deuteron spectra separate into contributions from direct processes and from evaporation. The integrated production rates are in agreement with previous results. The data are compared with various theoretical models.NUCLEAR REACTION $^{12}\mathrm{C}$, $^{40}\mathrm{Ca}$, $^{115}\mathrm{In}$, $^{209}\mathrm{Bi}$, measured spectra of $p$, $d$, $\ensuremath{\alpha}$ following ${\ensuremath{\pi}}^{\ensuremath{-}}$ absorption.

Emission of low-energy charged particles following negative-pion capture from rest

Negative pion capture in 3 He

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Emission of low-energy charged particles following negative-pion capture from rest

Negative pion capture in 3 He