Speaker
Description
We analyze the modifications that a dense nuclear medium induces in the Ds(2317)± and Tcc(3875)±. In the vacuum, we consider them as isoscalar DK (Dbar Kbar) and DD (Dbar Dbar) S-wave bound states, which are dynamically generated from effective interactions that lead to different Weinberg compositeness scenarios. Matter effects are incorporated through the two-meson loop functions, taking into account the self energies that the D, D, Dbar, Dbar, K and Kbar develop when embedded in a nuclear medium. Although Ds(2317) and Tcc(3875) particle-antiparticle lineshapes are the same in vacuum, we find extremely different density patterns in matter. This charge-conjugation asymmetry for the Ds(2317) [Tcc[3875]) mainly stems from the very different kaon [Dbar and Dbar] and antikaon [D and D] interaction with the nucleons of the dense medium. We show that the in-medium lineshapes found for these resonances strongly depend on their DK and DD molecular contents, respectively, and discuss how this novel feature can be used to better determine/constrain the inner structure of these exotic states.
