9th Shivalik HEPCATS (High Energy Physics, Cosmology, Astronomy: Theory and Simulations)

Contribution List

22. Opening Remards

27/01/2024, 10:00

12. Broadband spectral and temporal study of TeV blazar TXS 0518+211

Avik Das (IISER Mohali)

27/01/2024, 10:10

Blazars are the most powerful subclass of active galactic nuclei and are observed across the entire electromagnetic spectrum, from radio to high-energy (HE) to very high-energy (VHE) gamma ray. In this work, we have examined the long-term behavior of the bright TeV gamma-ray TXS 0518+211. We constructed a multi-wavelength light curve of this source using Swift-XRT/UVOT and Fermi-LAT data....

21. Spectro-temporal study of Jet Emission: Insight into Relativistic Particle Spectra

Dr Pankaj Kushwaha (Indian Institute of Science Education and Research (IISER) Mohali)

27/01/2024, 10:30

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...

19. Fermi-LAT gamma-ray spectral and temporal state during VHE episodes of FSRQs

Megha .

27/01/2024, 10:50

In this talk, I’ll present my on-going work on the nine FSRQs which were detected at very high energies (VHE, E>100 GeV). Using the Fermi-LAT data, we attempt to explore the source behavior during VHE emission by comparing with spectral, temporal, and statistical behavior during non-VHE time. We have also compared the outcomes from all the sources and seek out the patterns and distinctions in...

20. Two-loop master integrals for di-jet production with massive internal loops

Ms Mandeep Kaur (IISER Mohali, India)

27/01/2024, 11:30

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,...

11. Axial charmonium production in $e^- e^+\rightarrow\gamma^*\rightarrow H’ + H’’$ at $\sqrt{s}=10.6$ GeV at B-factories

Ms Monika Narang (Chandigarh University)

27/01/2024, 11:50

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...

26. ALP at the future ep colliders

Pramod Sharma

27/01/2024, 12:10

In Beyond Standard Model (BSM) theories, Axion-Like Particles (ALPs) are hypothesized to be Pseudo-Nambu-Goldstone bosons that have spontaneously broken the global Peccei-Quinn (PQ) symmetries at very high energies. Due to the approximated symmetry shifts, the ALPs are naturally lighter compared to the electroweak or QCD particles. Future high-precision experiments may be able to find ALPs...

5. Detector and physics simulation using heavy ion collisions at NICA-SPD

Mr Rishav Pandey (Larsen and Toubro Limited, India)

27/01/2024, 12:30

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,...

10. Some calculations on Hawking radiation

Ayan Chatterjee (Central University of Himachal Pradesh)

27/01/2024, 14:10

I shall develop some calculations for local formulation of black hole radiation using near horizon and on the horizon geometry.

9. Analytic three-dimensional primary hair charged black holes and thermodynamics

supragyan priyadarshinee

27/01/2024, 14:30

We present and discuss new families of primary hair charged black hole solutions in asymptotically anti-de Sitter space in three dimensions. The coupled Einstein-Maxwell-scalar gravity system, that carries the coupling $f(ϕ)$ between the scalar and Maxwell fields is solved, and exact hairy black hole solutions are obtained analytically. The hairy solutions are obtained for three different...

18. Some Properties of Black holes using Covariant Phase Space formalism.

Sahil Devdutt (Central University of Himachal Pradesh)

27/01/2024, 14:50

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.

17. Marginally trapped surfaces in pure gauss bonnet gravity

Akshay Kumar (CENTRAL UNIVERSITY OF HIMACHAL PRADESH)

27/01/2024, 15:10

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...

14. Low Earth orbit satellite's orbit disintegration due to perturbations and predictions using machine learning.

MAMTA GULATI (Thapar Institute of Engineering and Technology, Patiala)

28/01/2024, 09:30

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...

1. Steep potentials in Warm Inflation

Suratna Das

28/01/2024, 09:50

Steep potentials in cold inflation leads to power-law type inflation where inflation does not exit gracefully as long as one considers standard general relativity. Warm inflation, a variant inflationary paradigm to the standard cold inflation scenario, can accommodate steep potentials very easily. Not only inflation gracefully exits in these Warm Inflationary scenarios, but they also lead to...

16. Origin of magnetic fields during inflation and their subsequent evolution

Krishna Mohan Parattu (IIT Mandi)

28/01/2024, 10:10

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.

15. Dark Matter:Initial Steps Decoded

Ganesh. K

28/01/2024, 10:30

DARK MATTER:
INITIAL STEPS DECODED

I think most of you all know much about dark matter ,but it's origin is still a mystery .
Do you believe that dark matter is formed due to stars or force present in atoms .The dark matter was formed during big bang. let me explain .
Did you ever know that a black hole mass M would exert same or identical gravitational pull as the star with mass M....

13. Two-loop form factors for Dark Matter annihilation to colored Standard Model particles

Mr Warsimakram I K (Indian Institute of Science Education and Research, Mohali)

28/01/2024, 11:30

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...

8. Pole-Skipping and Chaos in Too MUCH Hot QCD

Mr Shivam Kushwah (IIT Roorkee U.K.)

28/01/2024, 11:50

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...

2. Heavy quark dynamics via Gribov-Zwanziger approach

Mr SUMIT Rana (IIT Roorkee)

28/01/2024, 12:10

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...

6. Entanglement and Chaos near Critical Point in Strongly Coupled Gauge Theory

Sanjay Pant (IIT ROPAR)

28/01/2024, 12:30

We perform a holographic study of the high and low temperature behaviour of logarithmic negativity (LN) in a large $N$ strongly coupled thermal field theory with critical point, having a well defined gravity dual known as 1RC black hole. The bulk theory accommodates a dimensionless parameter $\xi$, proportional to the charge of the 1RC black hole. Holographically, $\xi \to 2$ limit ensures an...

7. Holographic Thermal Correlators for Hyperbolic CFTs

Arpit Maurya (IIT Ropar)

28/01/2024, 12:50

We use holography to compute the exact form of retarded Green’s functions for a scalar operator with conformal dimension $\Delta$ in a thermal CFT and in its related counterpart with chemical potential in $R^1\times H^3$. In our analysis, we recast the wave equation of a scalar field in the normal form of Heun's equation in the dual gravity theories described by the AdS hyperbolic blackhole...

23. Break

25. Break

4. Discovery of rare decay modes at the Belle and Belle II experiment.

Manish Kumar (Department of Physical Sciences, IISER Mohali)

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...

24. Lunch