$$\lambda $$ and $$\rho $$ Regge trajectories for bottom-charm tetraquarks $$(bq)(\bar{c}\bar{q}')$$ and $$(cq)(\bar{b}\bar{q}')$$
Year: 2025
Type: article
Abstract: Using the newly proposed tetraquark Regge trajectory relations, we investigate three series of Regge trajectories for bottom-charm tetraquarks $$(bq)(\bar{c}\bar{q}')$$ ( b q ) ( c ¯ q ¯ ′ ) and $$(cq)(\bar{b}\bar{q}')$$ ( c q ) ( b ¯ q ¯ ′ ) with $$q,q'=u,d,s$$ q , q ′ = u , d , s : the $$\rho _1$$ ρ 1 -, $$\rho _2$$ ρ 2 -, and $$\lambda $$ λ -trajectories. We provide rough estimates for the masses of the $$\rho _1$$ ρ 1 -, $$\rho _2$$ ρ 2 -, and $$\lambda $$ λ -excited states. Except for the $$\lambda $$ λ -trajectories, the complete forms of the other two series of Regge trajectories for bottom-charm tetraquarks are lengthy and cumbersome. We show that the $$\rho _1$$ ρ 1 - and $$\rho _2$$ ρ 2 -trajectories cannot be obtained by simply imitating meson Regge trajectories, because mesons have no substructures. To derive these trajectories, the tet
Source: The European Physical Journal C
Authors: Jiao-Kai Chen, He Song, Xin-Ru Liu
Institution: Shanxi Normal University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4416607885