The study on the structure of exotic states ${\chi }_{c1}(3872)$ via beauty-hadron decays in $pp$ collisions at $\sqrt{s}=8\mathrm{TeV}$

Abstract

A dynamically constrained phase-space coalescence (DCPC) model was introduced to study the exotic state ${\chi }_{c1}(3872)$ yield for three possible structures: tetraquark state, nuclear-like state, and molecular state respectively, where the hadronic final states generated by the parton and hadron cascade model (PACIAE). The ${\chi }_{c1}(3872)$/$\psi (2S)$ cross-section ratio from beauty-hadron decays (non-prompt) based on the ${\chi }_{c1}(3872)$ or $\psi (2S)\to J/\psi {\pi }^{+}{\pi }^{-}$ bound state in the decay chains as a function of charged-particle multiplicity and transverse momentum in $pp$ collisions at $\sqrt{s}=8\mathrm{TeV}$ are calculated. A tetraquark state scenario from PACIAE+DCPC model shows better agreement with the LHCb and ATLAS measurements for the non-prompt ${\chi }_{c1}(3872)$/$\psi (2S)$ cross-section ratio distributions, indicating that the ${\chi }_{c1}(3872)$ is more likely to be a compact tetraquark state.

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Cited by in corpus (6)

• Identifying an $\mathrm{X}(3872)$ tetraquark state versus a molecular state by formation time, velocity and temperature in relativistic nuclear collisions
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• Coalescence production of sexaquark with three diquarks in high-energy nuclear collisions
• The charmonium-like exotic hadron productions in $e^{+}{e}^{-}$ collisions at the BESIII energy with the PACIAE model
• Investigation of $T_{cs0}^{\ast }(2870{)}^0$ in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the PACIAE model