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Setting Limits on Supersymmetry Using Simplified Models
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Precise QCD predictions for W-boson production in association with a charm jet
A Gehrmann-De Ridder1,2, T Gehrmann2, E W N Glover3,4
1Institute for Theoretical Physics, ETH, 8093 Zurich, Switzerland.
The European Physical Journal. C, Particles and Fields
|July 25, 2024
Summary
Investigating W-boson production with charm jets offers a sensitive method to probe the proton
Area of Science:
- High Energy Physics
- Quantum Chromodynamics (QCD)
- Particle Physics
Background:
- Probing the proton's internal structure is crucial for understanding fundamental forces.
- Strange quark distributions are key components of the proton's composition.
- W-boson production in association with charm jets offers a unique experimental signature.
Purpose of the Study:
- To precisely calculate W-boson + charm-jet production cross sections.
- To investigate the sensitivity of this process to strange quark parton distributions.
- To assess the perturbative stability of the calculated cross sections.
Main Methods:
- Utilizing a novel flavour dressing procedure to define charm quark jets.
- Performing calculations up to next-to-next-to-leading order (NNLO) in Quantum Chromodynamics (QCD).
- Analyzing cross sections for both same-sign and opposite-sign charge combinations of W boson and charm jet.
Main Results:
- The W-boson + charm-jet production is confirmed as a sensitive probe of strange quark distributions.
- Calculations demonstrate good perturbative stability for the production cross sections.
- A detailed breakdown by partonic initial states identifies optimal observables for flavor studies.
Conclusions:
- W-boson + charm-jet production provides a powerful tool for exploring quark parton distributions.
- The NNLO QCD calculations offer a robust theoretical framework for experimental analysis.
- This study paves the way for precise measurements of the proton's flavor content.
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