• Open Access

Strange molecular partners of the Zc(3900) and Zc(4020)

Zhi Yang, Xu Cao, Feng-Kun Guo, Juan Nieves, and Manuel Pavon Valderrama
Phys. Rev. D 103, 074029 – Published 30 April 2021

Abstract

Quantum chromodynamics presents a series of exact and approximate symmetries which can be exploited to predict new hadrons from previously known ones. The Zc(3900) and Zc(4020), which have been theorized to be isovector D*D¯ and D*D¯* molecules [IG(JPC)=1(1+)], are no exception. Here we argue that from SU(3)-flavor symmetry, we should expect the existence of strange partners of the Zc’s with hadronic molecular configurations D*D¯sDD¯s* and D*D¯s* (or, equivalently, quark content cc¯sq¯, with q=u, d). The quantum numbers of these Zcs and Zcs* structures would be I(JP)=12(1+). The predicted masses of these partners depend on the details of the theoretical scheme used, but they should be around the D*D¯sDD¯s* and D*D¯s* thresholds, respectively. Moreover, any of these states could be either a virtual pole or a resonance. We show that, together with a possible triangle singularity contribution, such a picture nicely agrees with the very recent BESIII data of the e+eK+(DsD*0+Ds*D0).

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  • Received 18 November 2020
  • Accepted 1 April 2021

DOI:https://doi.org/10.1103/PhysRevD.103.074029

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

  1. Physical Systems
Particles & FieldsNuclear Physics

Authors & Affiliations

Zhi Yang1,*, Xu Cao2,3,†, Feng-Kun Guo4,3,‡, Juan Nieves5,§, and Manuel Pavon Valderrama6,∥

  • 1School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
  • 4CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 5Instituto de Física Corpuscular (centro mixto CSIC-UV), Institutos de Investigación de Paterna, Apartado 22085, 46071, Valencia, Spain
  • 6School of Physics, International Research Center for Nuclei and Particles in the Cosmos and Beijing Key Laboratory of Advanced Nuclear Materials and Physics, Beihang University, Beijing 100191, China

  • *zhiyang@uestc.edu.cn
  • caoxu@impcas.ac.cn
  • fkguo@itp.ac.cn
  • §jmnieves@ific.uv.es
  • mpavon@buaa.edu.cn

Article Text

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Issue

Vol. 103, Iss. 7 — 1 April 2021

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