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arXiv · 2108.03479

Forming Molecular States with Hadronic Rescattering

Philip Ilten·Marius Utheim
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Abstract

A method for modelling the prompt production of molecular states using the hadronic rescattering framework of the general-purpose Pythia event generator is introduced. Production cross sections of possible exotic hadronic molecules via hadronic rescattering at the LHC are calculated for the $\chi_{c1}(3872)$ resonance, a possible tetraquark state, as well as three possible pentaquark states, $P_c^+(4312)$, $P_c^+(4440)$, and $P_c^+(4457)$. For the $P_c^+$ states, the expected cross section from $\Lambda_b$ decays is compared to the hadronic-rescattering production. The $\chi_{c1}(3872)$ cross section is compared to the fiducial $\chi_{c1}(3872)$ cross-section measurement by LHCb and found to contribute at a level of O(1%). Finally, the expected yields of $P_c^+$ production from hadronic rescattering during Run 3 of LHCb are estimated. The prompt background is found to be significantly larger than the prompt $P_c^+$ signal from hadronic rescattering.

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Philip Ilten, Marius Utheim. 2021-08-07. Forming Molecular States with Hadronic Rescattering. https://doi.org/10.1140/epja/s10050-021-00650-1

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