Title: Probing Jets with Insights from Their Substructure

Speaker: Dr. Lata Panwar

Meeting Link: https://zoom.us/j/92116176467?pwd=NnZhcFZQbk5GRk5kbWdTWWJMcDlCQT09

Abstract: Jets, the collimated bunch of particles originating from quarks and gluons, are among one of the interesting and the most complex objects studied at colliders. With a good understanding of jets, we can use them as a tool to explore both Standard Model (SM) and Beyond Standard Model (BSM) physics. There are two distinct ways of treating jets to understand the associated physics: either treating them as unified objects and examining their kinematics, or by delving into their internal constituent-level structures, known as jet substructure. Recently, theoretical and experimental methods based on jet substructure have become a prominent area of research, where ongoing efforts focus on calibrating jets, developing jet tagging methods, and understanding the Quantum Chromodynamics (QCD) behind jet formation using information from jet substructure. In this colloquium, I will first discuss the reconstruction of jets at the detector level and then proceed with a new Jet Energy Calibration method based on jet substructure being developed by the ATLAS collaboration. I will also present a High-Luminosity Large Hadron Collider (HL-LHC) projection study where a jet substructure-based jet tagging method has been used, and sensitivity for BSM physics associated with Higgs boson is projected. Furthermore, we will explore a theoretical representation of phase space within jets known as the "Lund Jet Plane," a modern approach for understanding and measuring jet substructure in experimental data. Together, we will go through the advantages of the "Lund Jet Plane" and briefly discuss my corresponding research work.