Roper-like singly heavy baryons in a chiral model

Authors

  • Daiki Suenaga RCNP, Osaka University

DOI:

https://doi.org/10.31349/SuplRevMexFis.3.0308025

Keywords:

Singly heavy baryons; chiral symmetry; pentaquark picture

Abstract

We investigate the Roper-like singly heavy baryons such as Λc(2765) and Ξc(2967) in a chiral model. Based on chiral symmetry of diquarks inside the baryons, we propose that the Roper-like baryons are mostly pentaquark states (Qqqqq¯ ) while the corresponding ground-state ones Λc(2286) and Ξc(2470) are three-quark states (Qqq). Besides, the mass spectrum of negative-parity Λc and Ξc which are heavy quark spin-singlet is predicted by the linear representation of chiral symmetry. We also derive a sum rule of the heavy baryon masses and an extended Goldberger-Treiman relation. In addition to them, we demonstrate the parity-partner structure of the Λc’s and Ξc’s by showing mass degeneracies of them at the chiral restoration point. We expect that the present investigation leads to a better understanding of the diquarks inside hadrons from the viewpoint of chiral symmetry.

References

A. J. Arifi, H. Nagahiro, A. Hosaka and K. Tanida, Phys. Rev. D 101, no.11, 111502 (2020) doi:10.1103/PhysRevD.101.111502 [arXiv:2004.07423 [hep-ph]].

T. J. Moon et al. [Belle], Phys. Rev. D 103, no.11, L111101 (2021) doi:10.1103/PhysRevD.103.L111101 [arXiv:2007.14700 [hep-ex]].

P.A. Zyla et al. [Particle Data Group], PTEP 2020, no.8, 083C01 (2020) doi:10.1093/ptep/ptaa104.

L. D. Roper, Phys. Rev. Lett. 12, 340-342 (1964) doi:10.1103/PhysRevLett.12.340.

H. Nagahiro, S. Yasui, A. Hosaka, M. Oka and H. Noumi, Phys. Rev. D 95, no.1, 014023 (2017) doi:10.1103/PhysRevD.95.014023 [arXiv:1609.01085 [hep-ph]].

A. J. Arifi, D. Suenaga and A. Hosaka, Phys. Rev. D 103, no.9, 094003 (2021) doi:10.1103/PhysRevD.103.094003 [arXiv:2102.03754 [hep-ph]].

B. Chen, K. W. Wei, X. Liu and T. Matsuki, Eur. Phys. J. C 77, no.3, 154 (2017) doi:10.1140/epjc/s10052-017-4708-x [arXiv:1609.07967 [hep-ph]].

V. D. Burkert and C. D. Roberts, Rev. Mod. Phys. 91, no.1, 011003 (2019) doi:10.1103/RevModPhys.91.011003 [arXiv:1710.02549 [nucl-ex]].

M. A. Nowak, M. Rho and I. Zahed, Phys. Rev. D 48, 4370-4374 (1993) doi:10.1103/PhysRevD.48.4370 [arXiv:hep- ph/9209272 [hep-ph]].

W. A. Bardeen and C. T. Hill, Phys. Rev. D 49, 409-425 (1994) doi:10.1103/PhysRevD.49.409 [arXiv:hep-ph/9304265 [hep-ph]].

Y. Kawakami and M. Harada, Phys. Rev. D 97, no.11, 114024 (2018) doi:10.1103/PhysRevD.97.114024 [arXiv:1804.04872 [hep-ph]].

Y. Kawakami and M. Harada, Phys. Rev. D 99, no.9, 094016 (2019) doi:10.1103/PhysRevD.99.094016 [arXiv:1902.06774 [hep-ph]].

M. Harada, Y. R. Liu, M. Oka and K. Suzuki, Phys. Rev. D 101, no.5, 054038 (2020) doi:10.1103/PhysRevD.101.054038 [arXiv:1912.09659 [hep-ph]].

V. Dmitrasˇinovic ́ and H. X. Chen, Phys. Rev. D 101, no.11, 114016 (2020) doi:10.1103/PhysRevD.101.114016.

Y.Kawakami,M.Harada,M.OkaandK.Suzuki,Phys.Rev.D 102, no.11, 114004 (2020) doi:10.1103/PhysRevD.102.114004 [arXiv:2009.06243 [hep-ph]].

D. Suenaga and A. Hosaka, Phys. Rev. D 104, no.3, 034009 (2021) doi:10.1103/PhysRevD.104.034009 [arXiv:2101.09764 [hep-ph]].

Y. Bi, H. Cai, Y. Chen, M. Gong, Z. Liu, H. X. Qiao and Y. B. Yang, Chin. Phys. C 40, no.7, 073106 (2016) doi:10.1088/1674-1137/40/7/073106 [arXiv:1510.07354 [hep- ph]].

T. Yoshida, E. Hiyama, A. Hosaka, M. Oka and K. Sadato, Phys. Rev. D 92, no.11, 114029 (2015) doi:10.1103/PhysRevD.92.114029 [arXiv:1510.01067 [hep- ph]].

C. E. Detar and T. Kunihiro, Phys. Rev. D 39, 2805 (1989) doi:10.1103/PhysRevD.39.2805.

D. Jido, M. Oka and A. Hosaka, Prog. Theor. Phys. 106, 873- 908 (2001) doi:10.1143/PTP.106.873 [arXiv:hep-ph/0110005 [hep-ph]].

D. Zschiesche, L. Tolos, J. Schaffner-Bielich and R. D. Pisarski, Phys. Rev. C 75, 055202 (2007) doi:10.1103/PhysRevC.75.055202 [arXiv:nucl-th/0608044 [nucl-th]].

Y. Motohiro, Y. Kim and M. Harada, Phys. Rev. C 92, no.2, 025201 (2015) [erratum: Phys. Rev. C 95, no.5, 059903 (2017)] doi:10.1103/PhysRevC.92.025201 [arXiv:1505.00988 [nucl-th]].

G. Aarts, C. Allton, D. De Boni, S. Hands, B. Ja ̈ger, C. Praki and J. I. Skullerud, JHEP 06, 034 (2017) doi:10.1007/JHEP06(2017)034 [arXiv:1703.09246 [hep-lat]].

D. Suenaga, Phys. Rev. C 97, no.4, 045203 (2018) doi:10.1103/PhysRevC.97.045203 [arXiv:1704.03630 [nucl- th]].

T. Ishikawa, K. Nakayama and K. Suzuki, Phys. Rev. D 99, no.5, 054010 (2019) doi:10.1103/PhysRevD.99.054010 [arXiv:1812.10964 [hep-ph]].

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Published

2022-07-29

How to Cite

1.
Suenaga D. Roper-like singly heavy baryons in a chiral model. Supl. Rev. Mex. Fis. [Internet]. 2022 Jul. 29 [cited 2022 Dec. 9];3(3):0308025 1-5. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/6204