Skip to main content
SpringerLink
Log in

Baryon Spectroscopy at GlueX

  • Published:
Few-Body Systems Aims and scope Submit manuscript

Abstract

High-energy electrons and photons are remarkably clean probes of hadronic matter, providing a microscope for examining atomic nuclei and the strong nuclear force. The GlueX experiment in Hall D at Jefferson Laboratory has accumulated high-statistics samples of photoproduction data in recent years. Complementary to nucleon structure studies in deep inelastic scattering experiments, nucleon excitations provide the unique opportunity to explore the many aspects of non-perturbative QCD. While the last few years have seen significant progress toward the mapping of the nucleon and \(\Delta \) spectrum, experimental information on the spectrum, structure, and decays of strangeness \(-2\) \(\Xi \) baryons remains sparse compared to non-strange and strangeness \(-1\) baryons. Moreover, the photo-induced production mechanism for these so-called Cascade resonances is not well understood and expected to proceed via highly excited intermediate singly strange hyperons in reactions such as \(\gamma p\rightarrow K\,Y^*\,(\mathrm{e.g.}~\Lambda ^*,\,\Sigma ^*)\rightarrow KK\,\Xi ^{(*)}\). Copious data for excited strangeness \(-1\) baryons have also been collected with GlueX, e.g. for the \(\Lambda (1405)\) and \(\Lambda (1520)\), along with the data for Cascade baryons in this experimental hyperon program.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4

Similar content being viewed by others

References

  1. S. Adhikari et al. [GlueX Collaboration], The GlueX beamline and detector, Nucl. Instrum. Meth. A 987, 164807 (2021)

  2. M. Dugger et al. [GlueX Collaboration], A study of meson and baryon decays to strange final states with GlueX in Hall D (A proposal to the 39th Jefferson Lab Program Advisory Committee). [arXiv:1210.4508 [hep-ex]]

  3. A. AlekSejevs et al. [GlueX Collaboration], An initial study of mesons and baryons containing strange quarks with GlueX. [arXiv:1305.1523 [nucl-ex]]

  4. H. Al Ghoul et al. [GlueX Collaboration], Measurement of the beam asymmetry \(\Sigma \) for \(\pi ^0\) and \(\eta \) photoproduction on the proton at \(E_\gamma = 9\) GeV, Phys. Rev. C 95(4), 042201 (2017)

  5. S. Adhikari et al. [GlueX Collaboration], Beam Asymmetry \(\Sigma \) for the Photoproduction of \(\eta \) and \(\eta ^{\,\prime }\) Mesons at \(E_{\gamma }=8.8\) GeV, Phys. Rev. C 100(5), 052201 (2019)

  6. S. Adhikari et al. [GlueX Collaboration], Measurement of beam asymmetry for \(\pi ^-\Delta ^{++}\) photoproduction on the proton at \(E_\gamma \)= 8.5 GeV, Phys. Rev. C 103(2), L022201 (2021)

  7. S. Adhikari et al. [GlueX Collaboration] Measurement of the photon beam asymmetry in \(\overrightarrow{\gamma } p\rightarrow K^+\Sigma ^0\) at \(E_{\gamma } = 8.5\) GeV, Phys. Rev. C 101(6), 065206 (2020)

  8. R.L. Anderson et al., High-energy \(\pi ^0\) photoproduction from hydrogen with unpolarized and linearly polarized photons, Phys. Rev. D 4, 1937 (1971)

  9. R. L. Workman et al. [Particle Data Group], Review of particle physics, PTEP 2022, 083C01 (2022)

  10. R.G. Edwards, J.J. Dudek, D.G. Richards, S.J. Wallace, Excited state baryon spectroscopy from lattice QCD, Phys. Rev. D 84, 074508 (2011)

  11. A. Bazavov et al., Additional strange hadrons from QCD thermodynamics and strangeness freezeout in heavy ion collisions, Phys. Rev. Lett. 113(7), 072001 (2014)

  12. S. Eidelman et al. [Particle Data Group], Review of Particle Physics, Phys. Lett. B 592(1–4), 1 (2004)

  13. J. Barlow et al. [GlueX Collaboration], Study of the Reaction \(\gamma p\rightarrow p\eta \eta ^{\,\prime }\), Fall Meeting of the Division of Nuclear Physics of the American Physical Society, New Orleans, 27–30 Oct 2022

  14. E. Barriga et al. [GlueX Collaboration], Resonances in the \(\eta \omega \) system at GlueX,Fall Meeting of the Division of Nuclear Physics of the American Physical Society, New Orleans, 27–30 Oct 2022

  15. J.Z. Bai et al. [BES Collaboration], Study of \(N^\ast \) production from \(J / \psi \rightarrow p \bar{p}\,\eta \), Phys. Lett. B 510, 75–82 (2001)

  16. K. Moriya et al. [CLAS Collaboration], Spin and parity measurement of the \(\Lambda (1405)\) baryon, Phys. Rev. Lett. 112(8), 082004 (2014)

  17. M. Mai, Review of the \({\Lambda }\)(1405): a curious case of a strangeness resonance, Eur. Phys. J. ST 230(6), 1593–1607 (2021)

  18. S. Adhikari et al. [GlueX Collaboration], Measurement of spin density matrix elements in \(\Lambda (1520)\) photoproduction at 8.2–8.8 GeV, Phys. Rev. C 105(3), 035201 (2022)

  19. B. G. Yu, K. J. Kong, Photoproduction of \({\gamma p\rightarrow K^+\Lambda ^*(1520)}\) and decay of \(\Lambda ^*(1520)\rightarrow K^- p\) in the Reggeized framework, Phys. Rev. C 96(2), 025208 (2017)

  20. B. Aubert et al., [BABAR Collaboration], Measurement of the Spin of the \(\Xi (1530)\) Resonance, Phys. Rev. D 78, 034008 (2008)

  21. S.F. Biagi et al., \(\Xi ^\ast \) Resonances in \(\Xi ^-\) Be Interactions. II. Properties of \(\Xi (1820)\) and \(\Xi (1960)\) in the \(\Lambda \bar{K}^0\) and \(\Sigma ^0 \bar{K}^0\) Channels, Z. Phys. C 34, 175 (1987)

  22. M. Sumihama et al. [Belle Collaboration], Observation of \(\Xi (1620)^0\) and evidence for \(\Xi (1690)^0\) in \(\Xi _c^+ \rightarrow \Xi ^-\pi ^+\pi ^+\) decays, Phys. Rev. Lett. 122(7), 072501 (2019)

Download references

Acknowledgements

The author thanks the technical staff at Jefferson Lab and at all the participating institutions for their invaluable contributions to the success of the experiments. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-AC05-06OR23177. The group at Florida State University acknowledges additional support from the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Contract No. DE-FG02-92ER40735.

Author information

Authors and Affiliations

  1. Department of Physics, Florida State University, Tallahassee, FL, 32306, USA

    Volker Crede

Authors
  1. Volker Crede
    View author publications

    You can also search for this author in PubMed Google Scholar

Consortia

The GlueX Collaboration

Corresponding author

Correspondence to Volker Crede.

Ethics declarations

Conflict of interest

The authors declare that they have no competing interests.

Additional information

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Crede, V., The GlueX Collaboration. Baryon Spectroscopy at GlueX. Few-Body Syst 64, 32 (2023). https://doi.org/10.1007/s00601-023-01810-3

Download citation

  • Received:

  • Accepted:

  • Published:

  • DOI: https://doi.org/10.1007/s00601-023-01810-3

Search

Navigation