Speaker
Description
A number of new four-quark states containing from one to four $c$ or $\overline c$ quarks have been observed recently. Many of these new states have been discovered at the LHC. The production of these states via intrinsic charm in the proton is investigated. The tetraquark masses obtained in this approac agree well with the measured masses [1]. These calculations can provide some insight into the nature of the tetraquark candidates, whether as a bound meson pair or as a looser configuration of four individual partons which can influence their interactions in the nuclear medium, such as in heavy-ion collisions. The kinematic distributions of these states as a function of $y$ and $p_T$ are also studied. Previous investiagations [2-4] show that $J/\psi$ and $\overline D$ mesons produced from such states manifest themselves at forwrad rapidity and relatively high $p_T$. The extension to bottom tetraquark candidates is also considered.
[1] R. Vogt, Tetraquarks from Intrinsic Heavy Quarks,Phys. Rev. D in press, arXiv:2405.09018 [hep-ph].
[2] R. Vogt, Limits on Intrinsic Charm Production from the SeaQuest Experiment, Phys. Rev. C 103 (2021), 035204.
[3] R. Vogt, Energy dependence of intrinsic charm production: Determining the best energy for observation, Phys. Rev. C 106 (2022) 025201.
[4] Contribution from intrinsic charm production to fixed-target interactions with the SMOG Device at LHCb, Phys. Rev. C 108 (2023) 015201.
This work was performed under the auspices of the US DoE by LLNL under Contract DE-AC52-07NA27344 and supported by LDRD projects 21-LW-034 and 23-LW-036 and the HEFTY Collaboration.
