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Jet-associated resonance spectroscopy.
Christoph Englert1, Gabriele Ferretti2, Michael Spannowsky3
11SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK.
The European Physical Journal. C, Particles and Fields
|January 31, 2020
Summary
We studied new physics resonances in jet-photon or jet-Z final states at hadron colliders. Our model-independent approach characterizes resonance properties, aiding new physics discovery.
Area of Science:
- High Energy Physics
- Particle Physics
- Collider Physics
Background:
- Resonances in jet-photon or jet-Z final states are predicted by compositeness models.
- These resonances signal potential new physics beyond the Standard Model.
- Current analysis strategies by ATLAS and CMS can be generalized.
Purpose of the Study:
- To provide a model-independent characterization of new resonances.
- To determine the spin and helicity couplings of potential new resonances.
- To generalize signal generation strategies for new physics searches.
Main Methods:
- Parameterization of matrix elements at leading order using a narrow width approximation.
- Development of amplitudes up to spin 2 for resonance interactions.
- Simulation of kinematic distributions to constrain coupling structures.
Main Results:
- A comprehensive framework for analyzing resonance properties is presented.
- The study enables constraint of the resonance coupling structure.
- The approach generalizes existing signal generation methods for ATLAS and CMS.
Conclusions:
- The framework allows for detailed spin determination of resonances.
- Relative helicity couplings can be constrained, providing insights into new physics.
- While P/CP properties are challenging, spin and couplings offer valuable information.
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