Search for the standard model Higgs boson at the LEP2 Collider near √s = 183 GeV
R Barate, D Buskulic, D Decamp, P Ghez, C Goy, S Jezequel, JP Lees, A Lucotte, F Martin, E Merle, MN Minard, JY Nief, P Perrodo, B Pietrzyk, R Alemany, MP Casado, M Chmeissani, JM Crespo, M Delfino, E Fernandez Show all
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Published : 1999
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: mH > 87.9GeV/c2 at 95% confidence level. © 1999 Elsevier Science B.V. All rights reserved.