Magnetic Moments and Radiative Transitions of the Tcc(3875)+ and its partner states
Abstract
We systematically investigate the magnetic moments (MMs) and radiative decay widths of S-wave doubly heavy tetraquark states based on chromomagnetic interaction (CMI). They provide a complementary probe to distinguish compact from molecule structures in addition to the mass spectrum and strong decay properties. Using the CMI eigenvectors, we compute the MMs and M1 transition rates for the tetraquarks in the compact configuration. We predict the MM of the observed Tcc(3875)+ with I(JP)=0(1+) to be 0.45 μN when treating it as a compact tetraquark state, whereas the MM of the 0(1+) DD* molecule is about −0.07 μN. Five radiative transition channels related to the Tcc(3875)+ are identified with widths ranging from $6.07$ keV to $306.37$ keV. Our results show that the MMs of the JP=1+ bcq̅q̅′ (q/q′=u,d,s) and JP=1+ QQn̅s̅ (Q=b,c; n=u,d) states are influenced by the diquark-spin mixing. Through the analyses of radiative transitions between different tetraquark states, we find that such processes in the QQn̅n̅′, QQs̅s̅, and bcn̅s̅ cases may serve to reveal the tetraquark structures of the initial or final states. We also define the magnetic coupling matrices characterizing the MMs of the tetraquark system with JP=1+, with which the range of MM can be constrained. The present study provides a valuable reference point for the search of exotic states in future particle physics experiments.
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BibTeX
@misc{wu2026magnetic,
title = {{Magnetic Moments and Radiative Transitions of the $T_cc(3875)^+$ and its partner states}},
author = {Jing Wu and Yi-Kun Wang and Kai-Bao Chen and Yan-Rui Liu and Jian-Bo Cheng and Wei-Hua Yang},
howpublished = {arXiv},
year = {2026},
month = aug,
doi = {10.48550/arxiv.2608.27961},
eprint = {2608.27961},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2608.27961},
}
RIS
TY - UNPB
TI - Magnetic Moments and Radiative Transitions of the T_cc(3875)^+ and its partner states
AU - Jing Wu
AU - Yi-Kun Wang
AU - Kai-Bao Chen
AU - Yan-Rui Liu
AU - Jian-Bo Cheng
AU - Wei-Hua Yang
PY - 2026
DA - 2026/08/28
PB - arXiv
DO - 10.48550/arxiv.2608.27961
UR - https://arxiv.org/abs/2608.27961
AB - We systematically investigate the magnetic moments (MMs) and radiative decay widths of S-wave doubly heavy tetraquark states based on chromomagnetic interaction (CMI). They provide a complementary probe to distinguish compact from molecule structures in addition to the mass spectrum and strong decay properties. Using the CMI eigenvectors, we compute the MMs and M1 transition rates for the tetraquarks in the compact configuration. We predict the MM of the observed T_cc(3875)^+ with I(J^P)=0(1^+) to be 0.45 μ_N when treating it as a compact tetraquark state, whereas the MM of the 0(1^+) DD^* molecule is about −0.07 μ_N. Five radiative transition channels related to the T_cc(3875)^+ are identified with widths ranging from $6.07$ keV to $306.37$ keV. Our results show that the MMs of the J^P=1^+ bcq̅q̅^′ (q/q^′=u,d,s) and J^P=1^+ QQn̅s̅ (Q=b,c; n=u,d) states are influenced by the diquark-spin mixing. Through the analyses of radiative transitions between different tetraquark states, we find that such processes in the QQn̅n̅^′, QQs̅s̅, and bcn̅s̅ cases may serve to reveal the tetraquark structures of the initial or final states. We also define the magnetic coupling matrices characterizing the MMs of the tetraquark system with J^P=1^+, with which the range of MM can be constrained. The present study provides a valuable reference point for the search of exotic states in future particle physics experiments.
ER -