Astrophysical jets associated with compact objects are sites of most extreme physical conditions with emission detected up to TeV gamma-rays, implying ultra-relativistic particles. Despite significant progress and general understanding, the origin and extent of particle spectrum is yet to be fully understood. In this talk, we will present results from study of simultaneous broadband modeling...
Dijet production is a key QCD process at the Large Hadron Collider, utilised for measuring the running of the strong coupling constant, determining parton distribution functions, and searching for BSM signals. Therefore, precise theoretical predictions for its cross-section are of utmost importance. In my talk, I will discuss the analytical evaluation of non-trivial 2-loop master integrals,...
We have studied the production of ground and excited axial charmonia in processes, $e^- e^+ \rightarrow h_c(nP) + \eta_c(n'S)$, and $e^- e^+ \rightarrow \chi_{c1}(nP) + h_c(n'P)$ [1] for $n,n'=1,2$, through leading order (LO) tree-level diagrams $\sim O(\alpha_{em} \alpha_s)$, which proceed through exchange of a virtual photon and an internal gluon line connecting two quark lines in the...
The space-time picture of hadron formation in high-energy collisions with nuclear targets is still poorly known. The tests of hadron formation was suggested for the first stage of SPD running. They will require measuring charged pion and proton spectra with the precision better than $10\%$. A research has been carried out to check feasibility of such studies at SPD. In this work,...
I shall develop some calculations for local formulation of black hole radiation using near horizon and on the horizon geometry.
The covariant phase space formalism is used to understand the dynamics of black holes. Here we will present some properties of black holes which emerges out in this formalism.
The higher order theories like Lovelock’s and Gauss-Bonnet theories(GB) are unique
as they required no extra field beyond GR and holds the property of field equation for
order not greater than second order. The GB theory arise when order is 2 in Lovelock’s
action. We studied the formation and evolution of the marginally trapped surfaces and
collapsing shell for n-dimension space time...
Astrodynamics is a discipline that encompasses the mechanical characteristics of spacecrafts. This study focuses on the analysis of perturbation effects on the anticipated trajectory of a satellite in a low-earth orbit. Solar Radiation Pressure and Aerodynamic Drag are the two perturbation forces that have been determined through the utilization of a module constructed on a High-Performance...
Magnetic fields are found everywhere in the universe, including in intergalactic space. One possible mechanism for producing seed magnetic fields is by assuming a breaking of conformal invariance during inflation. I shall describe this mechanism as well as the evolution and certain quantum measures of these magnetic fields in some inflationary models of interest.
A UV complete model where the Dark Matter (DM) particle interacts with gluons via a colored scalar mediator provides a viable phenomenological model that can be tested at hadron colliders. While Mono-jet signatures are relevant for Collider searches, zero-jet processes would mean complete annihilation of Standard Model (SM) particles to DM particles, which contribute to relic-density of DM. We...
In this conference, I will discuss the question we have addressed whether the thermal QCD is chaotic or not. In our recent results, we have found that QCD is unusually chaotic above de-confinement temperature using its M-theory dual up to $O(R^4)$ corrections. The gauge invariant combination $Z_s(r)$ of scalar metric perturbation is found to possess an irregular singular point at the horizon...
In this work, we investigate the momentum-dependent drag and diffusion coefficient of heavy quarks (HQs) moving in the quark-gluon plasma (QGP) background. The leading order scattering amplitudes required for this purpose have been obtained using the Gribov-Zwanziger propagator for the mediator gluons to incorporate the non-perturbative effects relevant to the phenomenologically accessible...
We will present the study of rare decay modes B+ → Ds*+h0 and B+ → D+h0, where h0 denotes the neutral mesons (η and K0) using a data sample of the Belle experiment. These rare decay modes are poorly measured in the world, and we first time studied them using the full Belle data collected at an
asymmetric KEKB e+e- collider situated at Tsukuba, Japan. Along with rare decay modes, we will...
