SPARK 2023 (Symposium on Physics: Advances in Research and Knowledge)

Session

Technical Session 02

SPK-HEP

Oct 14, 2023, 11:30 AM

Ranghar Auditorium (North Lakhimpur University)

Conveners

Technical Session 02: Plenary Talk 01 & Track 01 Oral Presentations (1st half)

• M.K. Das (Tezpur University)

Description

HEP & Astro-particle, Astronomy and Astrophysics (& Plenary Talk 1)

9. Choices of scalars on neutrino mass model based on $A_4$ symmetry.

Victoria Puyam (Department of Physics, Manipur University)

Track 01

Oral

The neutrino mass models containing different scalars are constructed using $A_4\times Z_4$ discrete symmetry group. The mass matrices are developed in such a way that they can give necessary deviation from Tribimaximal mixing to generate non-zero ${\theta }_{13}$. The resultant mass matrices are analyzed and compared to understand the contribution of $A_4$ singlet scalars to the mass...

66. Comparative study of Parton distribution functions in the CTEQ framework

Mr Diptimonta Neog (Department of Physics, North Eastern Regional Institute of Science and Technology)

Track 01

Oral

Abstract: The studies of the Parton distribution function (PDFs) open a new way to a better understanding of the partonic quark-gluon structure of the nucleon. In the QCD study of high-energy processes, PDFs are essential. We study a few PDF sets with various Q2 ranges and momentum fraction x. All PDFs’ numerical values have been taken from the LHAPDF library, a user-friendly interface to PDF...

8. Determination of gluon density at small-x using BK evolution theory

Mr Ranjan Saikia (Tezpur University)

Track 01

Oral

Many deep inelastic scattering (DIS) experiments conducted on hadrons by leptons on the experimental site have produced important data on the distribution of partons within hadrons. Theoretical analysis of distribution at the various kinematical regions of small-$x$ (Bjorken's $x$) and $Q^2$ of DIS experiments is facilitated by the use of quantum chromodynamics (QCD) evolution equations. The...

12. Elliptic flow and fluctuation in Au+Au collisions at the STAR-BES energies in the AMPT model.

Mr Joydeep Thakur (University of North Bengal)

Track 01

Oral

We study the elliptic flow parameter $(v_2)$ and its event-by-event (e-by-e) fluctuation for the charged hadrons produced in ${}^{197}$Au+${}^{197}$Au collisions at the nucleon-nucleon center of momentum energy $\sqrt{s_{\mathrm{N}\mathrm{N}}}=7.7$, $11.5$, $19.6$, $27.0$, $39.0$ and $62.4$ GeV of the STAR Beam Energy Scan (BES) program. We use A Multiphase Transport (AMPT) model in its string melting (SM)...

32. Impact of Higher Order QED Correction on the Thermodynamic Topology of Euler-Heisenberg Ads Black Hole

Naba Jyoti Gogoi (PhD Research Scholar)

Track 01

Oral

Our presentation is based on the thermodynamic topology of the Euler-Heisenberg-AdS black hole and the higher-order Euler-Heisenberg-AdS black hole. This investigation is carried out by considering the generalized off-shell free energy approach, where black holes are conceptualized as defects in the thermodynamic space. Our study adopts the newly introduced residue method for this purpose. Our...

28. Neutrino masses in left-right asymmetric model

Bhabana Kumar (Tezpur University)

Track 01

Oral

This paper present a comprehensive investigation into the construction of a neutrino mass model utilizing the $\mathrm{\Gamma }(3)$ modular group, which exhibits an isomorphism with the $A_4$ symmetric group. The study focuses on developing a left-right asymmetric model by incorporating modular symmetry. An advantageous aspect of employing modular symmetry in our model is the elimination of need for...

29. Neutrino masses, mixings and leptogenesis using $A_4$ modular symmetry

Jotin Gogoi (Tezpur University)

Track 01

Oral

We have studied neutrino masses and mixings by adding a scalar triplet $\eta$ to the particle content of minimal inverse seesaw. In order to realize this extension of minimal inverse seesaw we implement an isomorphic modular group $\mathrm{\Gamma }(3)$ and a non-abelian discrete symmetry group $A_4$. The use of modular symmetry in our work helps us to reduce the number of flavons. We have also used...

23. Nuclear symmetry energy slope and its impact on exotic magnetized matter

Dr Vivek Baruah Thapa (Bhawanipur Anchalik College)

Track 01

Oral

In this study, we investigate the influence of the nuclear symmetry energy slope on the equation of state (EoS) of dense matter with Δ-admixed exotic matter in neutron stars and its consequences for neutron star (NS) observable properties such as mass-radius
relationships and tidal responses. The equation of state is formulated within the framework of covariant density functional theory,...

13. Numerical analysis of a general Majorana mass texture consistent with latest cosmological bound

Yumnam Monitar Singh

Track 01

Oral

The neutrino oscillation parameters are numerically extracted through the diagonalization of a general Majorana neutrino mass matrix whose elements are randomly generated within certain range of allowed values. The allowed values of each element are determined by using the latest neutrino oscillation experimental data within 3$\sigma$. The latest Planck upper bound on the sum of three absolute...

22. Phase space analysis of LRS-BI metric in f(Q) gravity theory

Pranjal Sarmah (Dibrugarh University)

Track 01

Oral

Isotropy and homogeneity are the two assumptions on which the standard cosmology stands. However, some observational deviations from the standard cosmological predictions have made the researchers more interested in anisotropic cosmological models. Locally rotationally symmetric Bianchi type I (LRS-BI) metric is one of the simplest yet prominent candidates to study the anisotropic...

53. Phenomenological study of texture zeros in Dirac neutrinos

Happy Borgohain

Track 01

Oral

Abstract:
After classifying all the possible texture zeros in light Dirac neutrino mass matrix in diagonal charged lepton basis, we studied the phenomenology of the texture zeros that are compatible with recent neutrino data. We consider the general (non-Hermitian) nature of the neutrino mass matrix which leads to more possibilities and freedom due to additional CP phases, mixing angles not...

6. Precision Measurement of the Positive Muon Anomalous Magnetic Moment at 0.20 ppm

Dr Atanu Nath (Tihu College, Tihu)

Track 01

Oral

The muon anomalous magnetic moment, denoted as aμ=(g−2)/2, serves as a crucial low-energy observable, offering an exceptional avenue for precision measurement and computational evaluation. This parameter stands as a rigorous litmus test for the Standard Model (SM) of particle physics and provides a sensitive window into potential new physics beyond the SM framework. Recent concerted efforts...

21. Propagation of UHE cosmic rays in the light of f(R) gravity power-law model

Mr Swaraj Pratim Sarmah (Dibrugarh University)

Track 01

Oral

While the origins of ultra-high energy (UHE) cosmic rays remain shrouded in uncertainty, several important milestones have been reached in recent years in the experimental study of cosmic rays with energy above ${10}^{18}$ eV. Within the vast expanse of intergalactic space, turbulent magnetic fields (TMFs) are believed to pervade, and these fields could exert a significant influence on the...

69. Self-interacting Dark Matter in the Light of Non-Standard Cosmology

Dr Manoranjan Dutta

Track 01

Oral

The cold, collisionless dark matter (DM) postulated in the $\mathrm{\Lambda }CDM$ model leads to several small scale anomalies such as the cusp-core problem, the missing satellites problem and the too big to fail problem. Self-interacting dark matter (SIDM), a promising alternative type of dark matter, not only alleviates the small scale anomalies, but also matches with highly accurate large scale...

3. Spectral and temporal properties of GX 17+2 utilizing a simultaneous view from AstroSat and NICER

Dr Biplob Sarkar (Department of Applied Sciences, School of Engineering, Tezpur University)

Track 01

Oral

We report the analysis of the Z-track neutron star (NS) low-mass X-ray binary (LMXB) GX 17+2 using the simultaneous data from the AstroSat (LAXPC/SXT) and NICER mission data. On segmenting the hardness intensity diagram (HID) into three slices—horizontal branch (HB), hard apex (HA), and normal branch (NB)- we investigate the variability of the source and its spectral state evolution throughout...

18. Topology of black hole Thermodynamics in Horava Lifshitz Gravity

Bidyut Hazarika (Research Scholar,Department of Physics,Dibrugarh University)

Track 01

Oral

In this work, we study the thermodynamic topology of a superfluid black hole solution in Horava gravity known as the Horava Lifshitz (HL) black hole in canonical ensemble. This exotic black hole solution belongs to a special class of of black holes whose thermodynamics exhibit a line of (continuous) second order phase transitions known as $\lambda$ phase transitions akin to those observed in...

20. Variational $M_{W_R}$ dependence of leptogenesis studied in minimal left-right symmetric model.

Ms Ankita Kakoti (Tezpur University)

Track 01

Oral

In this work, the Left-Right Symmetric Model (LRSM) has been realized with the modular group of level 3, that is, $\mathrm{\Gamma }(3)$ and weight 2, which is isomorphic to non-abelian discrete symmetry group $A_4$. As, it is a well known fact there are physics beyond the Standard Model framework, where several phenomenological studies can be carried out. In our present work, we are concerned about the...

15. ∆(54) flavor model for Majorana neutrinos: Double Inverse Seesaw

Mr Hrishi Bora (Tezpur University), Prof. Ng. K. Francis (Tezpur University), Mr Animesh Barman (Tezpur University)

Track 01

Poster

We formulate and discuss the neutrino mass matrices for the present neutrino oscillation data. The matrices are discussed numerically in the framework of the $\mathrm{\Delta }(54)$ flavor model with the double inverse seesaw mechanism for Majorana neutrinos. We introduced Vector like (VL) fermions which are all Standard Model gauge singlets. We use extra symmetry to constrain the unwanted terms in our...