Browsing Centre for High Energy Physics (CHEP) by Title
Now showing items 2847 of 60

Lessons for Conformal Field Theories from Bootstrap and Holography
(20180206)The work done in this thesis includes an exploration of both the conformal field theory techniques and holographic techniques of the Gauge/Gravity duality. From the field theory, we have analyzed the analytical aspects of ... 
Lessons for Gravity from Entanglement
One of the recent fundamental developments in theoretical high energy physics is the AdS/CFT correspondence [1, 2, 3, 4] which posits a relationship between Quantum Field Theories (QFT) in a given dimension and String ... 
Living on the Edge A Study of Boundary Modes In Twodimensional Topological Systems
In the last few decades an enormous amount of research has been carried out on some novel phases of matter called topological phases which are beyond the paradigm of Landau’s theory of symmetry breaking. One of the ... 
Mesonic screening mass at zero and finite chemical potential
The finite temperature analysis of QCD is challenging since perturbation theory is not applicable in that regime. A nonperturbative method like lattice QCD is thus required to obtain an estimate of the necessary observables. ... 
Model Studies Of The Hot And Dense Strongly Interacting Matter
(20160425)Ultrarelativisitic heavy ion collisions produce quark gluon plasmaa hot and dense soup of deconfined quarks and gluons akin to the early universe. We study two models in the context of these collisions namely, Polyakov ... 
New tools to constrain EFTs and CFTs
In this thesis, we develop new methods for the S matrix bootstrap in the context of 22 scattering amplitudes and fourpoint correlators in conformal field theories (CFTs). For 22 scattering in quantum field theories, ... 
Novel Pathways for Beyond Standard Model Physics
In the light of discovering the Higgs boson and null results at the LHC, we look for new pathways for Beyond Standard Model Physics, which could accommodate at least one of the Standard Model shortcomings. (i) Unification ... 
On Hypergeometric solutions of Feynman integrals using MellinBarnes Integrals with Applications
Experimental measurements of physical observables in particle colliders rely on highprecision theoretical calculations to validate the predictions of any theoretical model and detect signals of new physics. These theoretical ... 
Phenomenological Explorations in Dark Matter
The previous decade has seen an explosive increase in explorations into the nature of dark matter (DM) encompassing astrophysical, particle and cosmological probes. We face today a large body of gravitational evidences ... 
Probing Higgs Boson Interactions At Future Colliders
(20101111)We present in this thesis a detailed analysis of Higgs boson interactions at future colliders. In particular we examine, in a model independent way, the sensitivity of an Linear Collider in probing the interaction of ... 
Probing the Beyond Standard Model Physics in Top Quark and Dark Matter Sectors
(20180522)The Standard Model (SM) of particle physics provides the theoretical framework to describe the fundamental interactions among elementary constituents of matter. SM is supported by experiments to a high degree of accuracy, ... 
Prompt and Displaced Signatures of Physics Beyond the Standard Model
The quest to understand our Universe’s fundamental particles and their interactions has led us to the Standard Model (SM) of particle physics. Despite successfully explaining the weak, electromagnetic, and strong ... 
Quantum dynamics of weak measurements: Understanding the Born rule and applying weak error correction
Projective measurement is used as a fundamental axiom in quantum mechanics, even though it is discontinuous and cannot predict which measured operator eigen state will be observed in which experimental run. The probabilistic ... 
Quantum Spin Chains And Luttinger Liquids With Junctions : Analytical And Numerical Studies
(20100309)We present in this thesis a series of studies on the physical properties of some one dimensional systems. In particular we study the low energy properties of various spin chains and a junction of Luttinger wires. For spin ... 
Quantum walks and spatial search on regular graph
Random walks and algorithms based upon them are used widely to explore large state spaces that arise while studying physical systems. In this thesis, we will discuss some quantum generalizations of such algorithms and study ... 
RandallSundrum Model as a Theory of Flavour
(20180411)The discovery of the Higgs boson by the LHC provided the last piece of the puzzle neces sary for the Standard Model (SM) to be a successful theory of electroweak scale physics. However there exist various phenomenological ... 
Renormalization Group Summation at High Orders and Implications to the Determination of Some Standard Model Parameters
In perturbation theory, predictions from theories like Quantum Chromodynamics (QCD) are obtained by evaluating Feynman diagrams to high orders. Such calculations for re sults for various processes are already available ... 
Search for dark matter produced in association with a Higgs boson decaying to a pair of bottom quarks in protonproton collisions at √s= 13 TeV using CMS 2017 and 2018 data
The discovery of the Higgs boson has opened a new portal to search for Dark Matter(DM). Since DM does not interact in the CMS detector, searches rely on the missing transverse energy in association with a visible SM ... 
Search for dark matter produced in association with bjets in protonproton collisions at ￼√s = 13 TeV with the CMS detector using full Run2 data
A search for dark matter particles in the events containing large missing transverse energy accompanied by bquarks has been performed. The data collected by the Compact Muon Solenoid detector at the Large Hadron Collider ... 
Search for LongLived Particles at High Luminosity Large Hadron Collider and Beyond
Despite extensive searches, clear indications of new physics beyond the Standard Model (BSM) remain elusive. Traditionally, experimental searches at the Large Hadron Collider (LHC) during Phase I and phenomenological studies ...