HHIQCD2024

Doubly charmed tetraquark Tcc+ and left-hand cut

Oct 18, 2024, 2:00 PM

1h

Panasonic Auditorium, Yukawa Hall (YITP)

1st and 2nd weeks (Hadron structure and interactions) Seminar (1,2 week)

Speaker

Dr Yan Lyu (RIKEN iTHMES)

Description

In this talk, I will first present the $D^{\ast }D$ scattering results obtained using $(2+1)$-flavor lattice QCD simulations with a nearly physical pion mass of $m_{\pi }=146$ MeV, which is crucial for understanding the first doubly charmed tetraquark $T_{cc}^{+}$. Next, I will discuss the left-hand cut singularity, which has been recently pointed out to be relevant for analyzing $T_{cc}^{+}$. Special focus will be given on its origin in both non-relativistic and relativistic scatterings, how this singularity appears/disappears in the infinite/finite volume scattering, as well as its implications.

Presentation materials

Yan Lyu_Tcc and left-hand cut from LQCD_HHIQCD.pdf