Mrinal Kumar Das
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
Mrinal Kumar Das has a total of 33 co-authors. Here are the top co-authors by number of shared publications:
- Debasish Borah
Department of Physics Tezpur University Tezpur-784028 India
11 shared publications - Happy Borgohain
Tezpur University
10 shared publications - Pritam Das
Salbari College
9 shared publications - Lavina Sarma
Department of Physics, Tezpur University, Tezpur, India
8 shared publications - Ananya Mukherjee
Department of Physics Tezpur University 784 028 Tezpur India
7 shared publications - Bichitra Bijay Boruah
Department of Physics Tezpur University 784028 Tezpur India
7 shared publications
Latest Publications
- 29 June 2026
- Published by Springer Nature in Interactions
- Vol. 247 (1) , 286
Realisation of two–zero texture of neutrino mass matrix using $\Gamma _{3}$ modular group with type–II seesaw dominance in left–right symmetric model- 29 June 2026
- Published by Springer Nature in Interactions
- Vol. 247 (1) , 286
Realisation of two–zero texture of neutrino mass matrix using $\Gamma _{3}$ modular group with type–II seesaw dominance in left–right symmetric model- 1 February 2026
- Published by IOP Publishing in Journal of Physics G: Nuclear and Particle Physics
- Vol. 53 (2) , 025004
Matter-antimatter asymmetry in minimal inverse seesaw framework with A 4 modular symmetry
We propose a minimal inverse seesaw framework based on A 4 modular symmetry. We have studied the neutrino oscillation parameters in our work and our model excludes some 3 σ values of the mixing angle θ 23 . Also, there is a clear linear relation between the mixing angles θ 12 and θ 23 found in the allowed 3 σ region. We also examine whether the parameter points consistent with neutrino oscillation data simultaneously comply with the experimental limits on lepton flavor violating (LFV) decays, specifically: μ ⟶ eγ , τ ⟶ eγ , and τ ⟶ μγ . We have also investigated the matter-antimatter asymmetry of our universe via the resonant leptogenesis mechanism. Here, we present the contribution of lepton number conserving scattering processes mediated by the Z ′ boson in the context of leptogenesis.
- 1 February 2026
- Published by IOP Publishing in Journal of Physics G: Nuclear and Particle Physics
- Vol. 53 (2) , 025004
Matter-antimatter asymmetry in minimal inverse seesaw framework with A 4 modular symmetry
We propose a minimal inverse seesaw framework based on A 4 modular symmetry. We have studied the neutrino oscillation parameters in our work and our model excludes some 3 σ values of the mixing angle θ 23 . Also, there is a clear linear relation between the mixing angles θ 12 and θ 23 found in the allowed 3 σ region. We also examine whether the parameter points consistent with neutrino oscillation data simultaneously comply with the experimental limits on lepton flavor violating (LFV) decays, specifically: μ ⟶ eγ , τ ⟶ eγ , and τ ⟶ μγ . We have also investigated the matter-antimatter asymmetry of our universe via the resonant leptogenesis mechanism. Here, we present the contribution of lepton number conserving scattering processes mediated by the Z ′ boson in the context of leptogenesis.
- Open AccessNeutrino Textures from Modular $A_4$ Left--Right Symmetry: Experimental Signatures at DUNE and T2HK in the Post-JUNO EraWe have realized different two-zero textures within the framework of the left right symmetric model using the $Γ_{3}\cong A_{4}$ modular group. The matter multiplets of the model are assigned as three singlet representations of the $A_{4}$ group, and their charge assignments together with the modular weights of the Yukawa couplings are chosen in such a way that different two-zero textures of the neutrino mass matrix are obtained. In total, we have successfully realized seven different two-zero textures. Furthermore, we have studied neutrinoless double beta decay and lepton flavor violating (LFV) processes, and have calculated the effective Majorana mass and the branching ratios for LFV processes for each of the textures. We further probe these two-zero textures at the long-baseline neutrino experiments DUNE and T2HK. We find that DUNE, especially when combined with T2HK, can significantly restrict the $θ_{23}-δ_{\rm CP}$ parameter space predicted by these textures. Moreover, the inclusion of high-precision determinations of $θ_{12}$ (from JUNO) and $θ_{13}$ leads to a substantial, further reduction of the allowed parameter space. For assumed inverted mass ordering, the synergy of DUNE and T2HK leads to a highly predictive scenario for the $B_{2}$ and $B_{4}$ textures, as the allowed regions collapse into tiny islands near the CP-conserving points in the lower and higher octant of $θ_{23}$, respectively.Open AccessNeutrino Textures from Modular $A_4$ Left--Right Symmetry: Experimental Signatures at DUNE and T2HK in the Post-JUNO EraWe have realized different two-zero textures within the framework of the left right symmetric model using the $Γ_{3}\cong A_{4}$ modular group. The matter multiplets of the model are assigned as three singlet representations of the $A_{4}$ group, and their charge assignments together with the modular weights of the Yukawa couplings are chosen in such a way that different two-zero textures of the neutrino mass matrix are obtained. In total, we have successfully realized seven different two-zero textures. Furthermore, we have studied neutrinoless double beta decay and lepton flavor violating (LFV) processes, and have calculated the effective Majorana mass and the branching ratios for LFV processes for each of the textures. We further probe these two-zero textures at the long-baseline neutrino experiments DUNE and T2HK. We find that DUNE, especially when combined with T2HK, can significantly restrict the $θ_{23}-δ_{\rm CP}$ parameter space predicted by these textures. Moreover, the inclusion of high-precision determinations of $θ_{12}$ (from JUNO) and $θ_{13}$ leads to a substantial, further reduction of the allowed parameter space. For assumed inverted mass ordering, the synergy of DUNE and T2HK leads to a highly predictive scenario for the $B_{2}$ and $B_{4}$ textures, as the allowed regions collapse into tiny islands near the CP-conserving points in the lower and higher octant of $θ_{23}$, respectively.
- Open Access
- 29 November 2025
- Published by Oxford University Press (OUP) in Progress of Theoretical and Experimental Physics
- Vol. 2025 (12)
keV Sterile Neutrino as Dark Matter in Doublet Left-Right Symmetric Model with A 4 Modular Symmetry
The Left-Right Symmetric Model (LRSM) in this work is extended with a sterile fermion per generation, the lightest of which is considered to be a suitable dark matter candidate for the study and analysis of its associated properties. The model has been realized using $A_{4}$ modular symmetry, the advantage being the nonrequirement of the use of extra fields, hence keeping the model minimal. Because of the extension of the LRSM with the sterile fermion, the neutrino mass in this work will be generated by the double seesaw mechanism as described thoroughly within the paper. And for phenomenological studies, we have considered neutrinoless double beta decay, the details of which have been discussed thoroughly within the work.- 29 November 2025
- Published by Oxford University Press (OUP) in Progress of Theoretical and Experimental Physics
- Vol. 2025 (12)
Open AccesskeV Sterile Neutrino as Dark Matter in Doublet Left-Right Symmetric Model with A 4 Modular Symmetry
The Left-Right Symmetric Model (LRSM) in this work is extended with a sterile fermion per generation, the lightest of which is considered to be a suitable dark matter candidate for the study and analysis of its associated properties. The model has been realized using $A_{4}$ modular symmetry, the advantage being the nonrequirement of the use of extra fields, hence keeping the model minimal. Because of the extension of the LRSM with the sterile fermion, the neutrino mass in this work will be generated by the double seesaw mechanism as described thoroughly within the paper. And for phenomenological studies, we have considered neutrinoless double beta decay, the details of which have been discussed thoroughly within the work. - Open Access
- 9 September 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (9) , 1-25
Leptogenesis, 0νββ and lepton flavor violation in modular left-right asymmetric model with polyharmonic Maaß forms
In the absence of supersymmetry, modular forms need not be holomorphic functions of the modulus τ. Using this idea, we construct a non-supersymmetric framework using polyharmonic Maaß forms. In this approach, the Yukawa coupling is no longer strictly holomorphic in τ but instead incorporates both holomorphic and non-holomorphic components. We realize a non-supersymmetric, left-right asymmetric model based on the Γ3 ≅ A 4 modular group, where the active neutrino masses are generated via an extended inverse seesaw mechanism. The model successfully predicts the sum of neutrino masses below the current experimental bound and accommodates neutrino mixing angles within the 3σ range. Given its strong predictive power in neutrino oscillation parameters, we further explore its implications for beyond Standard Model (BSM) phenomena, including neutrinoless double beta (0νββ) decay, lepton flavor violation (LFV) and matter-antimatter asymmetry of the universe. Our findings indicate that the model predicts an effective Majorana mass and branching ratios for LFV processes consistent with experimental constraints while also providing a viable explanation for the observed baryon asymmetry through resonant leptogenesis.
- 9 September 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (9) , 1-25
Open AccessLeptogenesis, 0νββ and lepton flavor violation in modular left-right asymmetric model with polyharmonic Maaß forms
In the absence of supersymmetry, modular forms need not be holomorphic functions of the modulus τ. Using this idea, we construct a non-supersymmetric framework using polyharmonic Maaß forms. In this approach, the Yukawa coupling is no longer strictly holomorphic in τ but instead incorporates both holomorphic and non-holomorphic components. We realize a non-supersymmetric, left-right asymmetric model based on the Γ3 ≅ A 4 modular group, where the active neutrino masses are generated via an extended inverse seesaw mechanism. The model successfully predicts the sum of neutrino masses below the current experimental bound and accommodates neutrino mixing angles within the 3σ range. Given its strong predictive power in neutrino oscillation parameters, we further explore its implications for beyond Standard Model (BSM) phenomena, including neutrinoless double beta (0νββ) decay, lepton flavor violation (LFV) and matter-antimatter asymmetry of the universe. Our findings indicate that the model predicts an effective Majorana mass and branching ratios for LFV processes consistent with experimental constraints while also providing a viable explanation for the observed baryon asymmetry through resonant leptogenesis.
- Open AccessNeutrino phenomenology and Dark matter in a left-right asymmetric model with non-holomorphic modular $A_{4}$ groupWe present a model constructed within a non-supersymmetric framework capable of explaining both current neutrino oscillation data and the observed dark matter relic abundance. In this study, the Yukawa couplings are expressed as polyharmonic Maaß forms, and the non-supersymmetric left-right symmetric model is realized through the $Γ_{3}$ modular group, with neutrino masses generated via the Type II seesaw dominance mechanism. The analysis focuses on determining the neutrino oscillation parameters, the effective Majorana mass arising from the standard contribution, and the dark matter relic density. Our results indicate that the model strongly favours the normal mass hierarchy over the inverted one and prefers the lower octant for the mixing angle $θ_{23}$. Furthermore, the effective Majorana mass is predicted to lie in the range $10^{-3}\,\text{eV}$ to $0.1\,\text{eV}$. In addition, the lightest sterile neutrino present in the model is considered a viable dark matter candidate. A sterile neutrino mass in the range $10~\text{keV}$ to $30~\text{keV}$ is found to yield consistent results for both the relic density and active-sterile mixing angles.Open AccessNeutrino phenomenology and Dark matter in a left-right asymmetric model with non-holomorphic modular $A_{4}$ groupWe present a model constructed within a non-supersymmetric framework capable of explaining both current neutrino oscillation data and the observed dark matter relic abundance. In this study, the Yukawa couplings are expressed as polyharmonic Maaß forms, and the non-supersymmetric left-right symmetric model is realized through the $Γ_{3}$ modular group, with neutrino masses generated via the Type II seesaw dominance mechanism. The analysis focuses on determining the neutrino oscillation parameters, the effective Majorana mass arising from the standard contribution, and the dark matter relic density. Our results indicate that the model strongly favours the normal mass hierarchy over the inverted one and prefers the lower octant for the mixing angle $θ_{23}$. Furthermore, the effective Majorana mass is predicted to lie in the range $10^{-3}\,\text{eV}$ to $0.1\,\text{eV}$. In addition, the lightest sterile neutrino present in the model is considered a viable dark matter candidate. A sterile neutrino mass in the range $10~\text{keV}$ to $30~\text{keV}$ is found to yield consistent results for both the relic density and active-sterile mixing angles.
- Open Access
Froggatt-Nielsen like mechanism in the framework of Modular Symmetry for Neutrino Mass, Mixing and Leptogenesis
We study a neutrino mass model with Froggatt-Nielsen (FN) like modular symmetry. The FN mechanism requires an additional gauge symmetry, $U(1)_{FN}$, which is spontaneously broken at high energies. But in this work, we do not need an extra symmetry as modular weights play the role of the FN charges of the additional $U(1)_{FN}$ symmetry. We have constructed a neutrino mass model using FN-like modular symmetry in the $T'$ group. This model can accommodate neutrino oscillation parameters and also address other phenomena beyond the Standard Model, such as neutrinoless double beta decay and the baryon asymmetry of the universe.Open AccessFroggatt-Nielsen like mechanism in the framework of Modular Symmetry for Neutrino Mass, Mixing and Leptogenesis
We study a neutrino mass model with Froggatt-Nielsen (FN) like modular symmetry. The FN mechanism requires an additional gauge symmetry, $U(1)_{FN}$, which is spontaneously broken at high energies. But in this work, we do not need an extra symmetry as modular weights play the role of the FN charges of the additional $U(1)_{FN}$ symmetry. We have constructed a neutrino mass model using FN-like modular symmetry in the $T'$ group. This model can accommodate neutrino oscillation parameters and also address other phenomena beyond the Standard Model, such as neutrinoless double beta decay and the baryon asymmetry of the universe. - 24 June 2025
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics A
- Vol. 40 (23)
Study of neutrino phenomenology and 0νββ decay using polyharmonic Maaβ forms
In this study, we explore the application of the [ ] modular group, which is isomorphic to the [ ] symmetric group in developing a model for neutrino mass. We realized a nonsupersymmetric left–right asymmetric model incorporating modular symmetry, where the modular forms consist of both holomorphic and nonholomorphic components and the Yukawa couplings expressed through polyharmonic [ ] forms. To effectively implement the extended seesaw process in this model, we introduce one fermion singlet for each generation. We compute the effective mass and the associated half-life of [ ] by accounting for both standard and nonstandard contributions. Additionally, our study investigates the nonunitary effects and CP-violation arising from nonunitarity in this context. The model predicts values for the sum of neutrino masses and neutrino oscillation parameters are consistent with experiments. Furthermore, it yields satisfactory results in calculating the effective mass and half-life of [ ] decay. These findings highlight the possibility and benefit of employing modular symmetry in neutrino mass model construction.
- 24 June 2025
- Published by World Scientific Pub Co Pte Ltd in International Journal of Modern Physics A
- Vol. 40 (23)
Study of neutrino phenomenology and 0νββ decay using polyharmonic Maaβ forms
In this study, we explore the application of the [ ] modular group, which is isomorphic to the [ ] symmetric group in developing a model for neutrino mass. We realized a nonsupersymmetric left–right asymmetric model incorporating modular symmetry, where the modular forms consist of both holomorphic and nonholomorphic components and the Yukawa couplings expressed through polyharmonic [ ] forms. To effectively implement the extended seesaw process in this model, we introduce one fermion singlet for each generation. We compute the effective mass and the associated half-life of [ ] by accounting for both standard and nonstandard contributions. Additionally, our study investigates the nonunitary effects and CP-violation arising from nonunitarity in this context. The model predicts values for the sum of neutrino masses and neutrino oscillation parameters are consistent with experiments. Furthermore, it yields satisfactory results in calculating the effective mass and half-life of [ ] decay. These findings highlight the possibility and benefit of employing modular symmetry in neutrino mass model construction.
- Open Access
- 24 May 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (5) , 1-14
Neutrino mass genesis in scoto-inverse seesaw with modular $A_4$We propose a hybrid scotogenic inverse seesaw framework in which the Majorana mass term is generated at the one-loop level through the inclusion of a singlet fermion. This singlet Majorana fermion also serves as a viable thermal relic dark matter candidate due to its limited interactions with other fields. To construct the model, we adopt an $$A_4$$ flavour symmetry in a modular framework, where the odd modular weight of the fields ensures their stability, and the specific modular weights of the couplings yield distinctive modular forms, leading to various phenomenological consequences. The explicit flavour structure of the mass matrices produces characteristic correlation patterns among the parameters. Furthermore, we examine several testable implications of the model, including neutrinoless double beta decay ( $$0\nu \beta \beta $$ ), charged lepton flavour violation (cLFV), and direct detection prospects for the dark matter candidate. These features make our model highly testable in upcoming experiments.- 24 May 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (5) , 1-14
Open AccessNeutrino mass genesis in scoto-inverse seesaw with modular $A_4$We propose a hybrid scotogenic inverse seesaw framework in which the Majorana mass term is generated at the one-loop level through the inclusion of a singlet fermion. This singlet Majorana fermion also serves as a viable thermal relic dark matter candidate due to its limited interactions with other fields. To construct the model, we adopt an $$A_4$$ flavour symmetry in a modular framework, where the odd modular weight of the fields ensures their stability, and the specific modular weights of the couplings yield distinctive modular forms, leading to various phenomenological consequences. The explicit flavour structure of the mass matrices produces characteristic correlation patterns among the parameters. Furthermore, we examine several testable implications of the model, including neutrinoless double beta decay ( $$0\nu \beta \beta $$ ), charged lepton flavour violation (cLFV), and direct detection prospects for the dark matter candidate. These features make our model highly testable in upcoming experiments. - Open AccessMatter-antimatter asymmetry in minimal inverse seesaw framework with $A_4$ modular symmetryWe propose a minimal inverse seesaw framework based on $A_4$ modular symmetry. We have studied the neutrino oscillation parameters in our work and our model excludes some $3 σ$ values of the mixing angle $θ_{23}$. Also, there is a clear linear relation between the mixing angles $θ_{12}$ and $θ_{23}$ found in the allowed $3 σ$ region. We also examine whether the parameter points consistent with neutrino oscillation data simultaneously comply with the experimental limits on lepton flavor violating (LFV) decays, specifically: $μ\longrightarrow e γ$, $τ\longrightarrow e γ$, and $τ\longrightarrow μγ$. We have also investigated the matter-antimatter asymmetry of our universe via the resonant leptogenesis mechanism. Here, we present the contribution of lepton number conserving scattering processes mediated by the $ Z' $ boson in the context of leptogenesis.Open AccessMatter-antimatter asymmetry in minimal inverse seesaw framework with $A_4$ modular symmetryWe propose a minimal inverse seesaw framework based on $A_4$ modular symmetry. We have studied the neutrino oscillation parameters in our work and our model excludes some $3 σ$ values of the mixing angle $θ_{23}$. Also, there is a clear linear relation between the mixing angles $θ_{12}$ and $θ_{23}$ found in the allowed $3 σ$ region. We also examine whether the parameter points consistent with neutrino oscillation data simultaneously comply with the experimental limits on lepton flavor violating (LFV) decays, specifically: $μ\longrightarrow e γ$, $τ\longrightarrow e γ$, and $τ\longrightarrow μγ$. We have also investigated the matter-antimatter asymmetry of our universe via the resonant leptogenesis mechanism. Here, we present the contribution of lepton number conserving scattering processes mediated by the $ Z' $ boson in the context of leptogenesis.