| Autor: |
K. H. Lau, P. H. Steinberg, R. W. Ellsworth, L. J. Teig, R. G. Glasser, D. J. Bechis, C. Y. Chang, T. W. Dombeck, E. V. Sager |
| Rok vydání: |
1978 |
| Předmět: |
|
| Zdroj: |
Physical Review Letters. 40:602-604 |
| ISSN: |
0031-9007 |
| DOI: |
10.1103/physrevlett.40.602 |
| Popis: |
We report a null search for neutral heavy leptons produced unaccompanied by muons in 400-GeV/c proton-nucleon collisions in a magnetized beam dump and decaying in vacuum downstream. The upper limit on $\ensuremath{\sigma}B$ for ${L}^{0}'\mathrm{s}$ with Feynman $x\ensuremath{\gtrsim}0.2$ and ${\ensuremath{\theta}}_{\mathrm{lab}}\ensuremath{\lesssim}10$ mrad with branching ratio $B$ into two charged particles is $\ensuremath{\sigma}B\ensuremath{\lesssim}2.8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}35}$ ${\mathrm{cm}}^{2}$/nucleon at the 90% confidence level for masses below 1.0 GeV/${\mathit{c}}^{2}$ and lifetimes between ${10}^{\ensuremath{-}10}$ and ${10}^{\ensuremath{-}8}$ sec. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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