The η- and η′-Nucleus Interactions and the Search for η, η′- Mesic States

Bass, Steven D.; Metag, V.; Moskal, P.

doi:10.1007/978-981-15-8818-1_39-1

Cited by 2 publications

(2 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recent reviews on this topic can be found in Refs. [18,22,43,50,51,52]. These interactions can only be probed through the study of reactions that produce η mesons in the final state.…”

Section: Theoretical Considerations On the ηMesic Nucleimentioning

confidence: 99%

“…This opens the possibility for the formation of η-mesic states in light nuclei like helium ( 3 He, 4 He) [8, 9] or hydrogen isotopes ( 2 H, 3 H) [7,65]. The smaller absorption of η mesons in the light nuclei causes an increase in their lifetime in the nuclear medium, resulting in the formation of narrower bound states [52] that may be easier to observe compared to those in heavy nuclei. Additionally, there are no complications in interpreting results related to excitation of higher nuclear levels.…”

Section: Probing the Existence Of η-Mesic States In Light Nucleimentioning

confidence: 99%

See 1 more Smart Citation

Search for η-mesic nuclei: a review of experimental and theoretical advances

2023

View full text Add to dashboard Cite

In the mid-1980s, theoreticians predicted possible exotic states of an eta (η) meson and a nucleus bound by the strong interaction, so-called mesic nucleus. This led to extensive experimental efforts aimed at discovering such unstable states as well as understanding the underlying interactions via η meson production reactions. As experiments yielded new data, more and more sophisticated theoretical models were developed to understand the fundamental η-nucleon and η-nucleus interactions. After more than 35 years of research in this field, several signals have been identified as possible indications of hypothetical η-mesic nuclei, but there is still no general agreement or clear confirmation of their existence. In the paper, we review the study of the η-mesic nuclei with an emphasis on recent research activities.

show abstract

“…Recent reviews on this topic can be found in Refs. [18,22,43,50,51,52]. These interactions can only be probed through the study of reactions that produce η mesons in the final state.…”

Section: Theoretical Considerations On the ηMesic Nucleimentioning

confidence: 99%

Section: Probing the Existence Of η-Mesic States In Light Nucleimentioning

confidence: 99%

Search for η-mesic nuclei: a review of experimental and theoretical advances

2023

View full text Add to dashboard Cite

show abstract

Spinning protons and gluons in the η′

Bass

2024

Int. J. Mod. Phys. A

View full text Add to dashboard Cite

The proton spin puzzle has inspired a vast programme of experiments and theoretical work challenging our understanding of QCD and its role in the structure of hadrons. The proton’s internal spin structure is connected to chiral symmetry and, through gluon degrees of freedom in the flavor singlet channel, to the physics of the [Formula: see text] meson. Why do quarks contribute just about one third of the proton’s spin? Why are [Formula: see text] mesons and their interactions so sensitive to gluonic degrees of freedom? We review the status of these topics and some key observables for forthcoming experiments.

show abstract

The η- and η′-Nucleus Interactions and the Search for η, η′- Mesic States

Cited by 2 publications

References 103 publications

Search for η-mesic nuclei: a review of experimental and theoretical advances

Search for η-mesic nuclei: a review of experimental and theoretical advances

Spinning protons and gluons in the η′

Contact Info

Product

Resources

About