New Ωc0 baryons discovered by LHCb as the members of 1P and 2S states

Bing Chen and Xiang Liu
Phys. Rev. D 96, 094015 – Published 20 November 2017

Abstract

Inspired by the recently observed Ωc0 states at LHCb, we decode their properties by performing an analysis of their mass spectrum and decay behavior. Our studies show that the five narrow states, i.e., Ωc(3000)0, Ωc(3050)0, Ωc(3066)0, Ωc(3090)0, and Ωc(3119)0, could be grouped into the 1P states with negative parity. Among them, the Ωc(3000)0 and Ωc(3090)0 states could be the JP=1/2 candidates, while Ωc(3050)0 and Ωc(3119)0 are suggested as the JP=3/2 states. Ωc(3066)0 could be regarded as a JP=5/2 state. Since the spin-parity, electromagnetic transitions, and possible hadronic decay channels Ωc(*)π have not been measured yet, other explanations are also probable for these narrow Ωc0 states. Additionally, we discuss the possibility of the broad structure Ωc(3188)0 as a 2S state with JP=1/2+ or JP=3/2+. In our scheme, Ωc(3119)0 cannot be a 2S candidate.

  • Figure
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  • Received 9 April 2017

DOI:https://doi.org/10.1103/PhysRevD.96.094015

© 2017 American Physical Society

Physics Subject Headings (PhySH)

  1. Research Areas
Particles & Fields

Authors & Affiliations

Bing Chen1,3,* and Xiang Liu2,3,†

  • 1Department of Physics, Anyang Normal University, Anyang 455000, China
  • 2School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 3Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000, China

  • *chenbing@shu.edu.cn
  • Corresponding author. xiangliu@lzu.edu.cn

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Vol. 96, Iss. 9 — 1 November 2017

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