Executive Summary : | Quantum ChromoDynamics (QCD) is the theory of strong interaction, which is crucial for the formation of stable nuclear matter and over 90% of the mass in the visible universe. However, several aspects of QCD and its theory remain unexplored. For example, there are several ambiguous hadronic excitations, known as exotics or XYZs, in the heavy hadron sector that do not fit within conventional understanding. With the advent of high-energy collider experiments at the LHC, Belle II, and BES III, more heavy hadrons are discovered every year. Ab-initio investigations using lattice QCD techniques are highly appreciated by the scientific community worldwide. My research focuses on low energy hadron physics using lattice QCD techniques, including studying the energy spectrum and nature of exotic hadrons in the heavy quark sector. My main scientific objectives include studying the low energy spectra of heavy hadrons, focusing on promising channels for heavy quark exotics, nonperturbative determination of heavy meson decay constants and form factors, and the effects of temperature and chemical potential on these heavy hadronic states. The determination of their energy spectrum will help make reliable postdictions and predictions of masses and coupling of excitations with various scattering channels. The nature of these excitations will focus on shedding light on their structure, whether they are molecular or compact multi-quark states, and if they fit within conventionally known meson or baryon picture. Studies of decay constants and formfactors are essential for determining CKM matrix elements involving heavy quark flavors with unprecedented precision, setting the stage for confronting various BSM physics scenarios. |