Constraints on models for the Higgs boson with exotic spin and parity in $$\boldsymbol{VH\rightarrow Vb\bar{b}}$$ final states

Journal Article · Thu Oct 16 00:00:00 EDT 2014 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.113.161802· OSTI ID:1251199

Abazov, Victor Mukhamedovich ^[1]

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1. Joint Institute for Nuclear Research, Dubna (Russia). et al.

In this study, 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 $$p\bar{p}$$ collisions at $$\sqrt{s} = $$ 1.96~TeV collected with the D0 detector at the Fermilab Tevatron Collider. These are the first studies of Higgs boson $$J^{P}$$ with fermions in the final state. In the $$ZH\rightarrow \ell\ell b\bar{b}$$, $$WH\rightarrow \ell\nu b\bar{b}$$, and $$ZH\rightarrow \nu\nu b\bar{b}$$ final states, we compare the standard model (SM) Higgs boson prediction, $$J^{P}=0^{+}$$, with two alternative hypotheses, $$J^{P}=0^{-}$$ and $$J^{P}=2^{+}$$. We use a likelihood ratio to quantify the degree to which our data are incompatible with non-SM $$J^{P}$$ 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 $$J^{P}=0^{-}$$ and $$J^{P}=2^{+}$$ hypotheses at the 97.6$$\%$$ CL and at the 99.0$$\%$$ CL, respectively. The expected exclusion sensitivity for a $$J^{P}=0^{-}$$ ($$J^{P}=2^{+}$$) state is at the 99.86$$\%$$ (99.94$$\%$$) CL. Under the hypothesis that our data is the result of a combination of the SM-like Higgs boson and either a $$J^{P}=0^{-}$$ or a $$J^{P}=2^{+}$$ signal, we exclude a $$J^{P}=0^{-}$$ fraction above 0.80 and a $$J^{P}=2^{+}$$ fraction above 0.67 at the 95$$\%$$ CL. The expected exclusion covers $$J^{P}=0^{-}$$ ($$J^{P}=2^{+}$$) fractions above 0.54 (0.47).

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Contributing Organization: D0 Collaboration
• Grant/Contract Number: AC02-07CH11359
• OSTI ID: 1251199
• Alternate ID(s): OSTI ID: 1180701
• Report Number(s): FERMILAB-PUB-14-242-E; arXiv:1407.6369; PRLTAO; 1307751
• Journal Information: Physical Review Letters, Vol. 113, Issue 16; ISSN 0031-9007
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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