Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-11-19
Phys.Lett.B440:403-418,1998
Physics
High Energy Physics
High Energy Physics - Experiment
19 pages, 8 figures
Scientific paper
10.1016/S0370-2693(98)01239-8
During 1997 the ALEPH experiment at LEP gathered 57pb^-1 of data at centre-of- mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- -> HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: m_H > 87.9GeV/c^2 at 95% confidence level.
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