Where are the higher excited B and Bs mesons with coupled-channel effects?
Abstract
Inspired by the newly observed Bs0*(5700)0, whose mass agrees well with our previous unquenched prediction for Bs(13P0) [Phys.~Rev.~D \textbf{109}, 116006 (2024)], we study the mass spectra and OZI-allowed two-body strong decays of the higher 3S-, 2P-, 2D-, and 1F-wave B and Bs mesons in the same unquenched quark model. Our results show that coupled-channel effects significantly lower the masses and modify the relative level spacings. The scalar state B(23P0) is strongly affected: its mass is lowered well below the quenched quark model predictions, and it mainly decays into Bπ. Furthermore, the mass ordering of the vector states B(23D1) and B(33S1) is reversed, and the lighter B(23D1) state mainly decays into B1(5721)π. To test these results, the B(23P0) and B(23D1) states are worth searching for in the Bπ and B1(5721)π channels, respectively. In addition, some higher excitations are predicted to be relatively narrow and can be searched for in the B(*)π, B(*)K, B1(5721)π/K, and B2*(5747)π/K channels. These predictions provide useful references for future experimental searches and help clarify the role of coupled-channel effects in the heavy-light meson spectrum.
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BibTeX
@misc{ni2026where,
title = {{Where are the higher excited $B$ and $B_s$ mesons with coupled-channel effects?}},
author = {Ru-Hui Ni and Jia-Jun Wu and Xian-Hui Zhong},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.25125},
eprint = {2610.25125},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.25125},
}
RIS
TY - UNPB
TI - Where are the higher excited B and B_s mesons with coupled-channel effects?
AU - Ru-Hui Ni
AU - Jia-Jun Wu
AU - Xian-Hui Zhong
PY - 2026
DA - 2026/10/18
PB - arXiv
DO - 10.48550/arxiv.2610.25125
UR - https://arxiv.org/abs/2610.25125
AB - Inspired by the newly observed B_s0^*(5700)^0, whose mass agrees well with our previous unquenched prediction for B_s(1^3P_0) [Phys.~Rev.~D \textbf{109}, 116006 (2024)], we study the mass spectra and OZI-allowed two-body strong decays of the higher 3S-, 2P-, 2D-, and 1F-wave B and B_s mesons in the same unquenched quark model. Our results show that coupled-channel effects significantly lower the masses and modify the relative level spacings. The scalar state B(2^3P_0) is strongly affected: its mass is lowered well below the quenched quark model predictions, and it mainly decays into Bπ. Furthermore, the mass ordering of the vector states B(2^3D_1) and B(3^3S_1) is reversed, and the lighter B(2^3D_1) state mainly decays into B_1(5721)π. To test these results, the B(2^3P_0) and B(2^3D_1) states are worth searching for in the Bπ and B_1(5721)π channels, respectively. In addition, some higher excitations are predicted to be relatively narrow and can be searched for in the B^(*)π, B^(*)K, B_1(5721)π/K, and B_2^*(5747)π/K channels. These predictions provide useful references for future experimental searches and help clarify the role of coupled-channel effects in the heavy-light meson spectrum.
ER -