Alladi Ramakrishnan Hall

Glimpsing physics beyond the Standard Model at the LHC with Effective Field Theory Approach

Tisa Biswas

University of Calcutta

After more than a decade following the Higgs boson discovery, the LHC is set for two more decades of operations, during which it will also evolve into a precision machine. With this, the Effective Field Theory (EFT) is becoming prevalent in interpreting the high-energy interactions. In this talk, we will discuss the role played by the indirect deviations in Higgs couplings for the new non-resonant effects in the quest of heavy new physics. We will focus on the possible signatures of new interactions of the Higgs with the electroweak sector and the light quarks via various Higgs production channels in the Standard Model EFT framework. We highlight the potential of constraining such new interactions at the LHC. At the same time, we can also have signals of new physics where they can be
produced in presence of new light particles, such as Axion-Like Particles (ALPs). We will discuss an EFT which extends the SM by an ALP and mainly focus on the interactions of ALPs to heavy SM particles. We look for ALP signals when the ALP is kinematically too light to be on-shell and discuss the probes for these ALP interactions in the high energy regime at the LHC.