9-12 October 2025
Asia/Shanghai timezone

$DD^*$ Spectrum in Lattice QCD from Coordinate-Space Two-Hadron Operators and Long-Range Force Analysis

Not scheduled
20m

Speaker

Dr jiajun xie (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

Description

The $DD^*$ energy spectra are extracted from lattice QCD by utilzing the Coordinate-Space Two-Hadron Operators, named as dumbbell method. Finite-volume energies indicate an attractive interaction in $I=0$ channel and a repulsive interaction in $I=1$ channel. To investigate the contribution of the long-range potential, we perform fits using models with and without the long-range potential. We find that the long-range potential plays a crucial role in determining the nature of the pole for the $I=0$ case.When the long-range potential is included, the pole below the threshold acquires an imaginary part. In contrast, for the $I=1$ case, the behavior of $p \cot \delta$ with the long-range potential included only exhibits a cusp effect near the left-hand cut.

Primary author

Dr jiajun xie (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China)

Co-authors

Dr Lu Yu (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China) Prof. Wu Jia-Jun (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China) Dr Li Yan (Department of Physics, University of Cyprus, 20537 Nicosia, Cyprus) Yu Kang (School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China) Prof. Young Ross (Special Research Center for the Subatomic Structure of Matter (CSSM), Department of Physics, The University of Adelaide, Adelaide SA 5005, Australia) Zanotti James (Special Research Center for the Subatomic Structure of Matter (CSSM), Department of Physics, The University of Adelaide, Adelaide SA 5005, Australia) Dr Can Utku (Special Research Center for the Subatomic Structure of Matter (CSSM), Department of Physics, The University of Adelaide, Adelaide SA 5005, Australia)

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