# Four-jet final state production at LEP 1.5

- Institution: CERN
- Department: CERN Particle Physics Seminar
- Speaker: P Janot
- Year: 1996
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3022680)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

The four-jet final state is analyzed to search for hadronic decays of pair-produced heavy particles.The analysis uses the ALEPH data collected at LEP in November 1995 at centre-of-mass energies of 130 and 136 GeV. An excess of four-jet events is observed with respect to the standard model predictions. In addition,these events exhibit an enhancement in the sum of the two di-jet masses around 105 GeV. The properties of these events are studied and compared to the expectations from standard processes and to pair production hypotheses..

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## Lectures

1. [Four-jet final state production at LEP 1.5](https://invisiblenetwork.ai/learn/cern/3022680/3d9e2af2fefe), 1 h 8 min (CERN's player)