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  • Constraining some SMEFT operator using LHC data 
    JAIN, PRASHAM (2020-04)
    The discovery of the Higgs boson at the Large Hadron Collider (LHC) is the crowning achievement of the Standard Model (SM) of particle physics. The SM is now proven to be a consistent field theory describing a vast range ...
  • Aspects of de-Sitter Conjectures, Inflation and Axions 
    THAKUR, SHUBHAM MALLIK (2020-05)
    In this thesis we study three interesting ideas in Particle Physics and Cosmology: de-Sitter conjectures, some aspects of Inflation and Axions as Dark matter. The de-Sitter conjectures are statements about consistency ...
  • Entanglement in Quantum Field Theory and Quantum Gravity 
    SINHA, SOUNAK (2021-10)
    A quantum mechanical theory of the world leads to some surprising new phenomena, which are impossible to explain using our knowledge of classical mechanics. One such phenomenon is entanglement, which has no classical ...
  • Four-fermion operators at dimension 6 and IR-UV consistency 
    SINGH, AMARTYA HARSH (2022-05)
    A major task in phenomenology today is constraining the parameter space of SMEFT and constructing models of fundamental physics that the SM derives from. To this effect, we report an exhaustive list of sum rules for ...
  • Primordial Black Holes as a Dark Matter Candidate 
    SINGH, PRANITI (2022-05)
    Primordial Black Holes (PBHs) are one of the viable dark matter candidate that comprises some or all of its density in different mass regions. In this context, various constraints suggest that they could entirely comprise ...
  • Constraining the space of low energy EFTs 
    SHARMA, RAJAT (2023-04)
    We derive the causality and unitarity constraints on dimension 6 and dimension 8 Gluon field strength operators in the Standard Model Effective Field Theory (SMEFT). We use the ‘amplitude analysis’ i.e. dispersion relation ...
  • Bootstrapping Cosmological Correlators 
    PANCHAL, KUSHAN (2023-05)
    Both Conformal and Boostless Bootstrap techniques have been applied by many in the literature to compute pure scalar and graviton inflationary correlators. In this thesis, our focus will primarily be on mixed graviton and ...

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