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Low-energy supersymmetry and the Tevatron bottom-quark cross section
E L Berger1, B W Harris, D E Kaplan
1High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
Physical Review Letters
|May 1, 2001
Summary
Discrepancies in bottom-quark production are resolved by introducing light gluinos. Their pair production and decay into bottom quarks and bottom squarks align with collider data, offering testable predictions.
Area of Science:
- Particle Physics
- Quantum Chromodynamics
- Supersymmetry
Background:
- A persistent disagreement exists between measured bottom-quark production cross sections and theoretical predictions from perturbative quantum chromodynamics.
- This discrepancy challenges current models of fundamental particle interactions.
Purpose of the Study:
- To resolve the long-standing discrepancy in bottom-quark production cross sections.
- To propose and investigate a new theoretical scenario involving supersymmetric particles.
Main Methods:
- Investigated the pair production of light gluinos (mass range 12–16 GeV).
- Analyzed the two-body decays of these gluinos into bottom quarks and light bottom squarks.
- Compared the predicted bottom-quark production rate with existing hadron collider data.
Main Results:
- The proposed scenario of light gluino pair production and subsequent decay successfully reproduces the observed bottom-quark production rate.
- Constraints on this model were derived from low-energy experimental data.
Conclusions:
- The introduction of light gluinos provides a viable explanation for the bottom-quark production discrepancy.
- The model's predictions are amenable to experimental verification at future collider experiments, such as the Fermilab Tevatron.