Double-bottom centrifugal-barrier molecules dancing with four quarks

2025/05/06 by Zhipeng Wang, Wang, Zhi-Peng, Fu-Lai Wang +5
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Chromodynamics and Particle Interactions #Physics of Superconductivity and Magnetism

paper · pdf · doi:10.48550/arxiv.2505.03647

Abstract

Motivated by the recent Belle II measurement of the open-bottom cross section, we perform a systematic study of the double-bottom molecular tetraquark spectrum, including both S-wave and P-wave configurations. Using the one-boson-exchange potential and the complex scaling method, we investigate the B^(*)B^* and B^(*)B^* systems and predict several bound states and resonances. Our analysis reveals a rich spectrum, including BB^* (0(1⁺⁺), 0(0^-+)), B^*B^* (0(2⁺⁺), 0(0^-+), 0(1^--)), BB^* (0(1⁺)), and B^*B^* (0(1⁺)) bound states, as well as BB^* (0(1^--), 0(2^--)), B^*B^* (0(3^--)), BB^* (0(0^-)), and B^*B^* (0(1^-), 0(2^-)) resonances. Our results provide theoretical support for the existence of double-bottom tetraquarks and deliver key benchmarks for future searches at LHCb, Belle II, and other experiments.

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