Puzzles in Hadronic Physics and Novel Quantum Chromodynamics Phenomenology
Stanley J. Brodsky, Guy de Teramond, Marek Karliner

TL;DR
This paper reviews unresolved puzzles and anomalies in hadronic physics, explores potential solutions, and proposes new experiments to deepen understanding of QCD's phenomenology and foundational challenges.
Contribution
It introduces new perspectives on QCD physics, discusses experimental anomalies, and suggests novel tests to explore hadronic phenomena.
Findings
Identification of key anomalies challenging conventional QCD
Proposals for new experiments to test QCD predictions
Emergence of novel perspectives on QCD phenomenology
Abstract
We review some outstanding puzzles and experimental anomalies in hadron physics that appear to challenge conventional wisdom and, in some cases, the foundations of QCD. We also discuss possible solutions and propose new tests and experiments that could illuminate the underlying physics and novel phenomenological features of QCD. In some cases, new perspectives for QCD physics have emerged.
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