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Constraints on Models for the Higgs Boson with Exotic Spin and Parity in VH → Vb¯b Final States
Abazov, V. M. Abbott, B. Acharya, B. S. Adams, M. Adams, T. Agnew, J. P. Alexeev, G. D. Baringer, Philip S. Bean, Alice Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Agnew, J. P.
Alexeev, G. D.
Baringer, Philip S.
Bean, Alice
Wilson, Graham Wallace
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Abstract
We present constraints on models containing non-standard-model values for the spin J and parity P of the Higgs boson H in up to 9.7 fb−1 of pp¯ collisions at s√=1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. These are the first studies of Higgs boson JP with fermions in the final state. In the ZH→ℓℓbb¯, WH→ℓνbb¯, and ZH→ννbb¯ final states, we compare the standard model (SM) Higgs boson prediction, JP=0+, with two alternative hypotheses, JP=0− and JP=2+. We use a likelihood ratio to quantify the degree to which our data are incompatible with non-SM JP predictions for a range of possible production rates. Assuming that the production rate in the signal models considered is equal to the SM prediction, we reject the JP=0− and JP=2+ hypotheses at the 97.6% CL and at the 99.0% CL, respectively. The expected exclusion sensitivity for a JP=0− (JP=2+) state is at the 99.86% (99.94%) CL. Under the hypothesis that our data are the result of a combination of the SM-like Higgs boson and either a JP=0− or a JP=2+ signal, we exclude a JP=0− fraction above 0.80 and a JP=2+ fraction above 0.67 at the 95% CL. The expected exclusion covers JP=0− (JP=2+) fractions above 0.54 (0.47).
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This is the published version. Copyright © 2014 American Physical Society
Date
2014-10-16
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American Physical Society
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"Constraints on Models for the Higgs Boson with Exotic Spin and Parity in VH→Vbb¯ Final States." Physical Review Letters 113.16 (2014). http://dx.doi.org/10.1103/PhysRevLett.113.161802