Exotic hadronic states at HERA
Monica Vazquez (On behalf of the ZEUS, H1, HERMES, HERA-B, collaborations)
TL;DR
This paper reviews experimental searches at HERA for exotic baryons like pentaquarks, highlighting evidence for certain states such as Theta^+ and anti-charmed baryons, alongside negative results for other pentaquark searches.
Contribution
It provides a comprehensive overview of recent experimental findings on exotic baryons at HERA, including evidence and null results across multiple experiments.
Findings
Evidence for the strange pentaquark Theta^+
Observation of a narrow anti-charmed baryon decaying to D^{*-}p
Negative results in other pentaquark searches
Abstract
Recent results from H1, ZEUS, HERMES and HERA-B on searches for exotic baryons in ep collisions, eD scattering and pA scattering at HERA are reviewed. Evidence for the production of the strange pentaquark Theta^+ and of a narrow anti-charmed baryon decaying to D^{*-}p together with negative results of pentaquark searches at HERA are presented.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research