Speaker
Description
Doubly heavy tetraquarks $(QQ\bar{q}\bar{q})$ states with two heavy quarks and two light antiquarks have been actively discussed for a long time. Among them, a doubly charmed tetraquark $T_{cc}^+$ was reported by the LHCb Collaboration in 2022: A narrow peak appears in the $D^0D^0\pi^+$ mass spectrum around 273 keV below the $D^{*+}D^0$ threshold, with its isospin $I$,spin $J$, and parity $P$ consistent with $(I,J^P)=(0,1^{+})$. Since the binding energy of $T_{cc}^+$ measured from the $D^{*+}D^0$ threshold is small, we regard this state of hadronic molecule composed of two D mesons. In this work, we discuss the $T_{cc}^+$ ground state solved from Schrödinger equation with one-bosen exchange potential $(OBEP)$, and then the production of $D^*D$ is calculated through the use of a dynamical coalescence mechanism for the proton-proton (pp) collision at $\sqrt{s_{NN}}=7$ TeV. Through a comparative analysis with experimental measurements and other theoretical computations, we have disentangled the respective contributions of coalescence and factorization to the transverse momentum spectrum of the $T_{cc}^+$. Currently, we are calculating the collective dynamics of both the D meson and the $T_{cc}^+$, with the aim of gaining a deeper understanding of the formation of the $T_{cc}^+$ in heavy-ion collisions.
