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Combined Tevatron upper limit ongg→H→W+W−and constraints on the Higgs boson mass in fourth-generation fermion models

Journal article published in 2010 by T. Aaltonen, V. M. Abazov, B. Abbott, M. Abolins, B. S. Acharya, M. Adams, T. Adams, J. Adelman, E. Aguilo, G. D. Alexeev, G. Alkhazov, A. Alton, B. Álvarez González, G. Alverson, G. A. Alves and other authors.
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg->H->W+W- in p=pbar collisions at the Fermilab Tevatron Collider at sqrt{s}=1.96 TeV. With 4.8 fb-1 of integrated luminosity analyzed at CDF and 5.4 fb-1 at D0, the 95% Confidence Level upper limit on σ(gg->H) x B(H->W+W-) is 1.75 pb at m_H=120 GeV, 0.38 pb at m_H=165 GeV, and 0.83 pb at m_H=200 GeV. Assuming the presence of a fourth sequential generation of fermions with large masses, we exclude at the 95% Confidence Level a standard-model-like Higgs boson with a mass between 131 and 204 GeV. ; Comment: 14 pages, 4 figures. Submitted to PRD-RC