Investigating the hybrid textures of neutrino mass matrix for near maximal atmospheric neutrino mixing

In the present paper, we have studied that the implication of a large value of the effective Majorana neutrino mass in case of neutrino mass matrices having either two equal elements and one zero element (popularly known as hybrid texture) or two equal cofactors and one zero minor (popularly known as inverse hybrid texture) in the flavor basis. In each of these cases, four out of sixty phenomenologically possible patterns predict near maximal atmospheric neutrino mixing angle in the limit of large effective Majorana neutrino mass. This feature remains irrespective of the experimental data on solar and reactor mixing angles. In addition, we have also performed the comparative study of all the viable cases of hybrid and inverse hybrid textures at 3$\sigma$ CL

Texture One Zero Dirac Neutrino Mass Matrix With Vanishing Determinant or Trace Condition

In the light of non-zero and relatively large value of rector mixing angle ($\theta_{13}$), we have performed a detailed analysis of texture one zero neutrino mass matrix $M_{\nu}$ in the scenario of vanishing determinant/trace conditions , assuming the Dirac nature of neutrinos. In both the scenarios, normal mass ordering is ruled out for all the six possibilities of $M_{\nu}$, however for inverted mass ordering, only two are found to be viable with the current neutrino oscillation data at $3\sigma$ confidence level. Numerical and some approximate analytical results are presented.Comment: 27 pages, 6 figures, Accepted for Publication in Nuclear Physics

The Texture One Zero Neutrino Mass Matrix With Vanishing Trace

In the light of latest neutrino oscillation data, we have investigated the one zero Majorana neutrino mass matrix $M_{\nu}$ with zero sum condition of mass eigen values in the flavor basis, where charged lepton mass matrix is diagonal. Among the six possible one-zero cases, it is found that only five can survive the current experimental data, while case with (1, 1) vanishing element of $M_{\nu}$ is ruled out, if zero trace condition is imposed at 3$\sigma$ confidence level (CL). Numerical and some approximate analytical results are presented

Testing Texture Two Zero Neutrino Mass Matrices Under Current Experimental Scenario

The latest data from Planck collaboration has presented an improved sensitivity limit of the sum of neutrino masses ($\Sigma$), $\Sigma <0.17eV$ at 95$\%$ confidence level (CL). On the other hand, the updated global fits of neutrino oscillation have shown a refined range of atmospheric mixing angle $\theta_{23}$ at the same CL. In the light of these observations, we have re-investigated the five viable cases ( $B_{1, 2, 3, 4}$ and $C$) of texture two zero Majorana mass matrix in the flavor basis. Using the present Planck's data, we have demonstrated that only cases $B_{2}$ and $B_{4}$ are now viable for normal mass ordering, while remaining three cases does not meet the present experimental constraints at 2$\sigma$ CL. The viable cases are also found to be in agreement with the latest T2K, Super-Kamiokande and NO$\nu$A results, indicating the preference for normal neutrino mass ordering ($m_{1} < m_{2}<m_{3}$), a maximal Dirac CP-violating phase ($\delta \simeq 270^{0}$), and upper octant of neutrino mixing angle ($\theta_{23} > 45^{0}$). In addition, the implication of $\Sigma$ on neutrinoless double beta decay is studied for viable cases.Comment: 10 figures, 2 table

Indian Institutional Repositories (IRs) reflected in the Directory of Open Access Repository (DOAR): A Case Study

Open access resources are an essential part of the academic community by which students, researchers, and even faculties get useful resources to pursue their academic requirements. Open access repositories enhance the visibility of scholarly publications and improve the collaboration among the authors with the support of global networks. Open access institutional repository provides a platform to showcase the intellectual works of an individual organisation. At present a total of 5414 repositories were found on DOAR from all countries on different subjects. Out of 5414, 96 repositories were from India. The analysis presented in this study is based on selected criteria like software used, size of items, content included, languages and policy used, etc. This study explores the prominence of open access institutional repositories of India reflected in the Directory of Open Access Institutional Repository (DOAR). Authors made to visualize India\u27s contribution to repository type, disciplines, languages covered, and software used for building the Institutional Repository (IR) to communicate it better. As a concluding remark, the authors elucidated the opportunities and threats associated with the development of OAIR to meet the educational requirements of the academic community