arXiv subjects

Neelu Mahajan

Publications and source records attributed to Neelu Mahajan.

4 recordsLinked to original sources

arXiv2023

Journey through Gauge Theories: From Foundations to New Frontiers

From the humble beginnings of particle physics to groundbreaking discoveries, the journey of particle physics has revolutionized our understanding of the universe. The progression of particle physics, begin from the discovery of new particles, to gauge symmetries and many successful theories in its journey which help in building up the model that explain the underlying makeup of matter, regulated by fundamental forces led to establishment of Standard Model(SM). The discovery of neutrino oscillations compelled scientists to explore theories that extend beyond the Standard Model, which opened up new frontiers in the field of particle physics. The theories have shifted its paradigm to a single comprehensive theory at the scale of 10^14 GeV. This article explains the journey of particle physics from the basic constituent to the theory of everything.

hep-ph↗

arXiv2013

Investigating texture six zero lepton mass matrices

Texture six zero Fritzsch like as well as non Fritzsch like hermitian lepton mass matrices (144 combinations in all) have been investigated for both Majorana and Dirac neutrinos for their compatibility with the current neutrino oscillation data, keeping in mind the hierarchy of neutrino masses. All the combinations considered here for Majorana neutrino masses are ruled out by the existing data in the case of inverted hierarchy and degenerate scenario. For Majorana neutrinos with normal hierarchy, only 16 combinations can accommodate the experimental data. Assuming neutrinos to be Dirac particles, normal hierarchy, inverted hierarchy as well as degenerate neutrinos are ruled out for all combinations of texture 6 zero hermitian mass matrices.

hep-ph↗

arXiv2010

Exploring the parameter space of texture 4 zero quark mass matrices

We have attempted to extend the parameter space of the elements of the texture 4 zero Hermitian quark mass matrices, to include the case of `weak hierarchy' amongst them along with the usually considered `strong hierarchy' case. This has been carried out by giving wide variation to the hierarchy defining parameters D_U and D_D, having implications for the structural features of the mass matrices. We find that not only the weakly hierarchical mass matrices are able to reproduce the strongly hierarchical mixing angles but also both the phases having their origin in the mass matrices have to be non zero to achieve compatibility of these matrices with recent quark mixing data. Further noting the difference between the exclusive and inclusive values of V_ub, we have carried out separate analyses corresponding to these.

hep-ph↗

arXiv2010

Investigating non-Fritzsch like texture specific quark mass matrices

A detailed investigation of all possible textures of Fritzsch-like and non-Fritzsch like, 144 for texture 6 zero and 432 for texture 5 zero mass matrices, have been carried out to ascertain their compatibility with the existing quark mixing data. It seems that all the texture 6 zero possibilities are completely ruled out whereas in the case of texture 5 zero mass matrices the only viable possibility looks to be that of Fritzsch-like.

hep-ph↗