Scrutinizing the Higgs signal and background in the 2 e2 μ golden channel
Abstract
Kinematic distributions in the decays of the newly discovered resonance to four leptons are a powerful probe of the tensor structure of its couplings to electroweak gauge bosons. We present analytic calculations for both signal and background of the fully differential cross section for the `Golden Channel' e + e - μ + μ - final state. We include all interference effects between intermediate gauge bosons and allow them to be on- or off-shell. For the signal we compute the fully differential decay width for general scalar couplings to ZZ,γγ,and Zγ. For the background we compute the leading order fully differential cross section for q q annihilation into Z and γ gauge bosons, including the contribution from the resonant Z → 2 e2 μ process. We also present singly and doubly differential projections and study the interference effects on the differential spectra. These expressions can be used in a variety of ways to uncover the nature of the newly discovered resonance or any new scalars decaying to neutral gauge bosons which might be discovered in the future.
- Publication:
-
Journal of High Energy Physics
- Pub Date:
- January 2013
- DOI:
- 10.1007/JHEP01(2013)182
- arXiv:
- arXiv:1211.1959
- Bibcode:
- 2013JHEP...01..182C
- Keywords:
-
- Higgs Physics;
- Standard Model;
- High Energy Physics - Phenomenology;
- High Energy Physics - Experiment
- E-Print:
- References added