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Observation of an excess at 30 GeV in the opposite sign di-muon spectra of ${\rm Z} \to b\overline{ b} + {\rm X}$ events recorded by the ALEPH experiment at LEP
The re-analysis of the archived data recorded at the ${\rm Z}^{0}$ resonance by the ALEPH experiment at LEP during the years 1992-1995 shows an excess in the opposite sign di-muon mass spectra at 30.40 GeV in events containing b quarks. The excess has a natural width of 1.78 GeV. A compatible but sm...
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| Lenguaje: | eng |
| Publicado: |
2016
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| Acceso en línea: | http://cds.cern.ch/record/2226690 |