Abstract
We present constraints on models containing non-standard-model values for the spin and parity of the Higgs boson in up to of collisions at collected with the D0 detector at the Fermilab Tevatron Collider. These are the first studies of Higgs boson with fermions in the final state. In the , , and final states, we compare the standard model (SM) Higgs boson prediction, , with two alternative hypotheses, and . We use a likelihood ratio to quantify the degree to which our data are incompatible with non-SM 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 and hypotheses at the 97.6% CL and at the 99.0% CL, respectively. The expected exclusion sensitivity for a () 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 or a signal, we exclude a fraction above 0.80 and a fraction above 0.67 at the 95% CL. The expected exclusion covers () fractions above 0.54 (0.47).
- Received 23 July 2014
DOI:https://doi.org/10.1103/PhysRevLett.113.161802
© 2014 American Physical Society