Tevatron New Phenomena & Higgs Working Group
 
Tevatron Combined Upper Limit on gg→H→W+W- and Constraints on Fourth-Generation
Fermion Models
May 20, 2010
L=4.8 fb-1 (CDF) and 5.4 fb-1 (DØ)
(Assuming a heavy sequential fourth generation of fermions,
95% C.L. exclusion for a Higgs with mass mH between 131 and 204 GeV/c2)
It is published in
This result is an extension of the
recent combination
of CDF and D0's SM H→W+W- searches, which are
documented in three letters in PRL. The mass range is expanded, and the search is directed specifically
at the gg→H→W+W- process.
PRL link to combination paper: T. Aaltonen et al., (CDF and DØ Collaborations), Phys. Rev. Lett. 104, 061802 (2010).
PRL link to CDF's H→W+W- paper: T. Aaltonen et al. (CDF Collaboration), Phys. Rev. Lett. 104, 061803 (2010).
PRL link to DØ's H→l+l- Plus Missing ET paper: V. M. Abazov et al. (DØ Collaboration), Phys. Rev. Lett. 104, 061804 (2010).
The searches presented here focus only on the gg→H production mode, as this is the only one which is enhanced by a fourth
generation of fermions. The WH, ZH, and Vector Boson Fusion processes are assumed not to contribute, and limits are set on the
production rate cross section of gg→H times the decay branching ratio of H→W+W-.
Theoretical predictions from fourth-generation models are compared with the observed and expected limits,and the Higgs boson mass range between
131 and 204 GeV is excluded assuming a massive fourth generation of fermions.
Figures:
Unless otherwise marked, the signal expectations shown are for the infinite-mass scenario.
Other TEVNPHWG Higgs combinations
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