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Abstract:
Despite its remarkable success, the Standard Model fails to explain phenomena such as neutrino masses, dark matter, and the matter–antimatter asymmetry, motivating a wide range of Beyond the Standard Model (BSM) scenarios. A major challenge in this context is the inverse problem, where different models produce overlapping signatures; hence, identifying the underlying BSM scenario becomes difficult.
In this talk, I address this issue by investigating how the spin of exotic charged particles, and the dark matter candidates, can be determined at future colliders. Focusing on models with a stable neutral particle ($C^0$) and charged partners ($C^\pm$) decaying via a $W^\pm$ boson, we study the process $e^+e^- \to C^+C^- \to C^0C^0W^+W^-$, considering the Inert Doublet Model and the Minimal Supersymmetric Standard Model as representative examples of scalar and fermionic charged states, respectively. Using beam polarization at a future $e^+e^-$ collider, we demonstrate that the distributions of angular variables of the visible final-state particles provide an effective way to determine the spin of these exotic particles.
Biography：
I am Anjan Kumar Barik and completed my PhD at the Harish-Chandra Research Institute, India. My research focuses on exploring scenarios beyond the Standard Model that address unresolved questions in particle physics, such as the origins of neutrino masses and dark matter. I have also studied the collider signatures of these models at the Large Hadron Collider as well as at proposed future colliders.
Online Meeting Room：https://meeting.tencent.com/dm/tuwOfta70Q0Z
ID: 418830316