Exploratory study of possible resonances in heavy meson-heavy baryon coupled-channel interactions

  • We use a unitary coupled-channel model to study the D Λc-D Σc interactions. In our calculation, SU(3) flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different spin and parity are dynamically generated in the mass range of the recently observed pentaquarks. The approach is also extended to the hidden beauty sector to study the m B Λb-B Σb interactions. As the m b-quark mass is heavier than the m c-quark mass, there are more resonances observed for the m B Λb-B Σb interactions and they are more tightly bound.
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Chao-Wei Shen, Deborah Rönchen, Ulf-G. Meißner and Bing-Song Zou. Exploratory study of possible resonances in heavy meson-heavy baryon coupled-channel interactions[J]. Chinese Physics C, 2018, 42(2): 023106. doi: 10.1088/1674-1137/42/2/023106
Chao-Wei Shen, Deborah Rönchen, Ulf-G. Meißner and Bing-Song Zou. Exploratory study of possible resonances in heavy meson-heavy baryon coupled-channel interactions[J]. Chinese Physics C, 2018, 42(2): 023106.  doi: 10.1088/1674-1137/42/2/023106 shu
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Received: 2017-11-24
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    Supported by DFG and NSFC through funds provided to the Sino-German CRC 110 Symmetry and the Emergence of Structure in QCD (NSFC 11621131001, DFG TR110), as well as an NSFC fund (11647601). The work of UGM was also supported by the CAS President's International Fellowship Initiative (PIFI) (2017VMA0025)

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Exploratory study of possible resonances in heavy meson-heavy baryon coupled-channel interactions

    Corresponding author: Chao-Wei Shen,
  • 1. Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 2. University of Chinese Academy of Sciences(UCAS), Beijing 100049, China
  • 3.  Helmholtz-Institut fü
Fund Project:  Supported by DFG and NSFC through funds provided to the Sino-German CRC 110 Symmetry and the Emergence of Structure in QCD (NSFC 11621131001, DFG TR110), as well as an NSFC fund (11647601). The work of UGM was also supported by the CAS President's International Fellowship Initiative (PIFI) (2017VMA0025)

Abstract: We use a unitary coupled-channel model to study the D Λc-D Σc interactions. In our calculation, SU(3) flavor symmetry is applied to determine the coupling constants. Several resonant and bound states with different spin and parity are dynamically generated in the mass range of the recently observed pentaquarks. The approach is also extended to the hidden beauty sector to study the m B Λb-B Σb interactions. As the m b-quark mass is heavier than the m c-quark mass, there are more resonances observed for the m B Λb-B Σb interactions and they are more tightly bound.

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