Title: Spectroscopy of Exotics from Lattice QCD

Speaker: Dr. Parikshit Junnarkar, TIFR Bombay

Abstract: In the past decade and half, Lattice QCD has emerged as a powerful tool in making predictions directly from QCD. In this talk, I will describe results from lattice calculations for exotic states namely the H-dibaryon and doubly bottom tetraquark state. The H-dibaryon was conjectured as a deeply bound state in the MIT bag model nearly four decades ago. Extensive experimental searches however have ruled out the existence of a deeply bound state and its fate remains undecided. Lattice calculations have shown that this state is bound at unphysical pion masses and I will describe the prospect of predictions at the physical point. The doubly bottom tetraquark state was also predicted a while ago as a deeply bound state and in recent work we have confirmed this prediction. In addition, we explore the full spin-flavour space in search of bound states and I will also comment on prospects of the use of heavy quark effective theory in making predictions.