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Multi-lepton events at HERA |
| Reference |
G. Brandt, presented at DIS 2007, Spring 2007 |
| Document |
Conference paper or talk
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| Figures |
(1)
(2)
(3)
(4)
| | Tables |
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| Contact |
E. Sauvan, C. Diaconu |
| Abstract |
A search for multi-lepton (electron or muon) events at high
transverse momenta is performed on a data sample collected in e+-p
collisions with the H1 detector at HERA during the period 1994-2007. This
data sample corresponds to an integrated luminosity of 459 pb-1.
With respect to the published HERA I multi-electron and multi-muon analyses, additional topologies
with high PT electrons and muons are investigated. Yields of di-lepton and tri-lepton events
are measured and a general good agreement is found with the Standard Model (SM) predictions.
Combining all channels, four events are observed with a scalar sum of lepton transverse momenta
(sum PT ) greater than 100 GeV, compared to a SM expectation of 1.9 +- 0.4.
The four events with sum P_T > 100 GeV are observed in e+p collisions only where the
SM expectation is of 1.2 +- 0.2.
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| Comments | This updates the multilepton part of H1prelim-06-063 |
| Links |
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