Sambit Kumar Pusty
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Sambit Kumar Pusty has a total of 14 co-authors. Here are the top co-authors by number of shared publications:
- Rukmani Mohanta
University of Hyderabad
5 shared publications - Monojit Ghosh
Center of Excellence for Advanced Materials and Sensing Devices, Ruđer Bošković Institute, 10000 Zagreb, Croatia
3 shared publications - Rudra Majhi
Nabarangpur College
3 shared publications - Aishwarya Bhatta
University of Hyderabad
1 shared publication - Dhiren Panda
School of Physics University of Hyderabad 500046 Hyderabad- India
1 shared publication Dinesh Kumar Singha
University of Hyderabad
1 shared publication
Latest Publications
- Open Access
- 30 September 2026
- Published by Elsevier in Physics Letters B
- Vol. 882
Sensitivities of long and medium baseline experiments to sterile neutrinos and non-standard interactions
- 30 September 2026
- Published by Elsevier in Physics Letters B
- Vol. 882
Open AccessSensitivities of long and medium baseline experiments to sterile neutrinos and non-standard interactions
- Open Access
- 9 July 2026
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2026 (7) , 85
Probing non-unitarity of the PMNS matrix in P2SO and comparison with DUNE
A bstract: We compare the sensitivity of the upcoming long-baseline neutrino experiments Protvino to Super-ORCA (P2SO) and the Deep Underground Neutrino Experiment (DUNE) to non-unitarity (NU) of the leptonic mixing matrix in a model-independent framework. NU can arise in theories beyond the Standard Model that include heavy neutral leptons. These effects can modify neutrino oscillation probabilities and introduce new sources of CP violation, which may affect precision measurements of neutrino parameters. We find that DUNE provides stronger bounds on α 11 and | α 21 |, while P2SO shows better sensitivity to α 22 and α 33 , mainly due to its longer baseline and stronger matter effects. Our results show that DUNE (P2SO) will be able to improve the current bounds of α 11 ( α 33 ). We further examine correlations with standard oscillation parameters and quantify the impact of NU on mass hierarchy, octant, and CP-violation sensitivities. Our results show that these sensitivities depend upon NU in a non-trivial way interconnecting the parameter degeneracies and matter effects. Our results demonstrate the complementarity of P2SO and DUNE in probing NU and show that NU can significantly influence next-generation precision oscillation studies.
- 9 July 2026
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2026 (7) , 85
Open AccessProbing non-unitarity of the PMNS matrix in P2SO and comparison with DUNE
A bstract: We compare the sensitivity of the upcoming long-baseline neutrino experiments Protvino to Super-ORCA (P2SO) and the Deep Underground Neutrino Experiment (DUNE) to non-unitarity (NU) of the leptonic mixing matrix in a model-independent framework. NU can arise in theories beyond the Standard Model that include heavy neutral leptons. These effects can modify neutrino oscillation probabilities and introduce new sources of CP violation, which may affect precision measurements of neutrino parameters. We find that DUNE provides stronger bounds on α 11 and | α 21 |, while P2SO shows better sensitivity to α 22 and α 33 , mainly due to its longer baseline and stronger matter effects. Our results show that DUNE (P2SO) will be able to improve the current bounds of α 11 ( α 33 ). We further examine correlations with standard oscillation parameters and quantify the impact of NU on mass hierarchy, octant, and CP-violation sensitivities. Our results show that these sensitivities depend upon NU in a non-trivial way interconnecting the parameter degeneracies and matter effects. Our results demonstrate the complementarity of P2SO and DUNE in probing NU and show that NU can significantly influence next-generation precision oscillation studies.
- Open Access
Probing Signatures of Sterile Neutrinos in the MOMENT and DUNE Experiments
Motivated by the persistent short-baseline anomalies that hint at the possible existence of physics beyond the standard three-flavor paradigm, we study the phenomenology of light sterile neutrinos in the minimal (3 + 1) framework using two future experiments: the MuOn-decay MEdium-baseline NeuTrino beam experiment (MOMENT) and the Deep Underground Neutrino Experiment (DUNE). We place constraints on active–sterile mixing parameters, probe CP-violation discovery potential, and examine correlations between the standard Dirac CP phase and the additional CP phases arising from active–sterile mixing to quantify phase degeneracies. We present exclusion limits and demonstrate the crucial role of the near detector in improving sensitivities by one or two orders of magnitude compared to a configuration with only the far detector. We find that the presence of sterile neutrinos can reduce the CP-violation sensitivity in long-baseline neutrino oscillation experiments. For large sterile mass splittings, the rapid oscillations average out, leading to strong parameter degeneracies in DUNE. In contrast, MOMENT retains strong sensitivity to CP violation and efficiently disentangles the standard and sterile CP phases. Our results highlight the strong complementarity between DUNE and MOMENT and show that their combined capabilities provide a powerful test of the light sterile neutrino hypothesis in regions of the parameter space that remain weakly constrained by current data.
Open AccessProbing Signatures of Sterile Neutrinos in the MOMENT and DUNE Experiments
Motivated by the persistent short-baseline anomalies that hint at the possible existence of physics beyond the standard three-flavor paradigm, we study the phenomenology of light sterile neutrinos in the minimal (3 + 1) framework using two future experiments: the MuOn-decay MEdium-baseline NeuTrino beam experiment (MOMENT) and the Deep Underground Neutrino Experiment (DUNE). We place constraints on active–sterile mixing parameters, probe CP-violation discovery potential, and examine correlations between the standard Dirac CP phase and the additional CP phases arising from active–sterile mixing to quantify phase degeneracies. We present exclusion limits and demonstrate the crucial role of the near detector in improving sensitivities by one or two orders of magnitude compared to a configuration with only the far detector. We find that the presence of sterile neutrinos can reduce the CP-violation sensitivity in long-baseline neutrino oscillation experiments. For large sterile mass splittings, the rapid oscillations average out, leading to strong parameter degeneracies in DUNE. In contrast, MOMENT retains strong sensitivity to CP violation and efficiently disentangles the standard and sterile CP phases. Our results highlight the strong complementarity between DUNE and MOMENT and show that their combined capabilities provide a powerful test of the light sterile neutrino hypothesis in regions of the parameter space that remain weakly constrained by current data.
- Open Access
- 13 November 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (11) , 1294
Impact of scalar NSI with off-diagonal parameters at DUNE and P2SO
In this paper, we studied the impact of the off-diagonal SNSI parameters in the future long-baseline neutrino oscillation experiments DUNE and P2SO. In our analysis, we found that the sensitivities of these experiments altered in a very non-trivial way due to the presence of these parameters. Depending on the values of these parameters, they can either completely mimic the standard scenario or can wash out their CP sensitivity. For large values of parameters $$\eta _{e\mu }$$ and $$\eta _{e\tau }$$ , we obtained larger mass ordering and octant sensitivities as compared to the standard three flavour scenario. For the parameter $$\eta _{\mu \tau }$$ , the mass ordering sensitivity and the precision of $$\Delta m^2_{31}$$ deteriorated compared to the standard scenario. Our results also showed that the sensitivities were significantly influenced by the phases of the off-diagonal parameters.- 13 November 2025
- Published by Springer Nature in The European Physical Journal C
- Vol. 85 (11) , 1294
Open AccessImpact of scalar NSI with off-diagonal parameters at DUNE and P2SO
In this paper, we studied the impact of the off-diagonal SNSI parameters in the future long-baseline neutrino oscillation experiments DUNE and P2SO. In our analysis, we found that the sensitivities of these experiments altered in a very non-trivial way due to the presence of these parameters. Depending on the values of these parameters, they can either completely mimic the standard scenario or can wash out their CP sensitivity. For large values of parameters $$\eta _{e\mu }$$ and $$\eta _{e\tau }$$ , we obtained larger mass ordering and octant sensitivities as compared to the standard three flavour scenario. For the parameter $$\eta _{\mu \tau }$$ , the mass ordering sensitivity and the precision of $$\Delta m^2_{31}$$ deteriorated compared to the standard scenario. Our results also showed that the sensitivities were significantly influenced by the phases of the off-diagonal parameters. - 1 January 2025
- Published by Springer Nature
- p. 457-461
Scalar-NSI: A Unique Tool to Probe New Physics
- Open Access
- 18 September 2024
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2024 (9) , 1-22
Study of long range force in P2SO and T2HKK
In this paper, we investigate the sensitivities of the upcoming long-baseline neutrino experiments P2SO and T2HKK to the long-range force (LRF). In the context of these two experiments, our objective is to study (i) their capabilities to put bounds on the LRF parameters as well as on constraining the mass and coupling strength of the new gauge boson, which gives rise to LRF due to matter density in Sun and (ii) the effect of LRF in the measurement of standard oscillation parameters. In our study, we find that among the different neutrino experiments, the best bounds on the LRF parameters including mass of the new gauge boson and its coupling strength will come from the P2SO experiment. Our study also shows that LRF has non-trivial effect on the determination of the standard neutrino oscillation parameters except the precision of $$ \Delta {m}_{31}^2 $$ . For this parameter, the precision remains unaltered in the presence of LRF for both these experiments.- 18 September 2024
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2024 (9) , 1-22
Open AccessStudy of long range force in P2SO and T2HKK
In this paper, we investigate the sensitivities of the upcoming long-baseline neutrino experiments P2SO and T2HKK to the long-range force (LRF). In the context of these two experiments, our objective is to study (i) their capabilities to put bounds on the LRF parameters as well as on constraining the mass and coupling strength of the new gauge boson, which gives rise to LRF due to matter density in Sun and (ii) the effect of LRF in the measurement of standard oscillation parameters. In our study, we find that among the different neutrino experiments, the best bounds on the LRF parameters including mass of the new gauge boson and its coupling strength will come from the P2SO experiment. Our study also shows that LRF has non-trivial effect on the determination of the standard neutrino oscillation parameters except the precision of $$ \Delta {m}_{31}^2 $$ . For this parameter, the precision remains unaltered in the presence of LRF for both these experiments. - Open AccessInvestigating $ Υ(ns) \to τ^+ τ^- $ decay in the Leptoquark scenarioSeveral measurements on $R_D, R_{D^*}$, and $R_{J/ \psi}$ by the BaBar, Belle, and LHCb experiments show significant deviations from their Standard Model (SM) predictions, which illustrate the fact that the concept of lepton flavor universality (LFU) is violated in semileptonic $B$ meson as well as leptonic $\Upsilon(ns)(n=1,2,3)$ decays. Recently BaBar experiment announced that at $1.8\sigma$ level, $R_\Upsilon(3s)= {\rm Br}(\Upsilon(3s) \to \tau \bar{\tau})/{\rm Br}(\Upsilon(3s) \to \mu \bar{\mu})$ shows an acceptance with the SM. These fascinating findings point towards the possible implication of new physics in the $b \to c \tau \bar{\nu}$ transitions, which in turn, creates a new direction to look for new physics in $b \bar{b} \to \tau \bar{\tau} $ process. Thereby, the new physics contributions to the $b \to c \tau \bar{\nu}$ process would inevitably alter the $b \bar{b} \to \tau \bar{\tau} $ transitions. Here we conduct a $\chi^{2}$ fit to constraining the new parameters by using the measured values of $ R_D$, $R{_D*}$, $ R_{J/ \psi}$, $ R_{X_C}$, $F_L (D^*)$ and $P_{\tau} (D^*)$. In this context, we investigate the effect of constrained new physics couplings on the branching ratios and LFU parameters $R_{\Upsilon(ns)}$ through leptoquark models such as $S_3, \tilde{S_1}, \tilde{R_2}, U_1, U_3 $ and $ V_2$.Open AccessInvestigating $ Υ(ns) \to τ^+ τ^- $ decay in the Leptoquark scenarioSeveral measurements on $R_D, R_{D^*}$, and $R_{J/ \psi}$ by the BaBar, Belle, and LHCb experiments show significant deviations from their Standard Model (SM) predictions, which illustrate the fact that the concept of lepton flavor universality (LFU) is violated in semileptonic $B$ meson as well as leptonic $\Upsilon(ns)(n=1,2,3)$ decays. Recently BaBar experiment announced that at $1.8\sigma$ level, $R_\Upsilon(3s)= {\rm Br}(\Upsilon(3s) \to \tau \bar{\tau})/{\rm Br}(\Upsilon(3s) \to \mu \bar{\mu})$ shows an acceptance with the SM. These fascinating findings point towards the possible implication of new physics in the $b \to c \tau \bar{\nu}$ transitions, which in turn, creates a new direction to look for new physics in $b \bar{b} \to \tau \bar{\tau} $ process. Thereby, the new physics contributions to the $b \to c \tau \bar{\nu}$ process would inevitably alter the $b \bar{b} \to \tau \bar{\tau} $ transitions. Here we conduct a $\chi^{2}$ fit to constraining the new parameters by using the measured values of $ R_D$, $R{_D*}$, $ R_{J/ \psi}$, $ R_{X_C}$, $F_L (D^*)$ and $P_{\tau} (D^*)$. In this context, we investigate the effect of constrained new physics couplings on the branching ratios and LFU parameters $R_{\Upsilon(ns)}$ through leptoquark models such as $S_3, \tilde{S_1}, \tilde{R_2}, U_1, U_3 $ and $ V_2$.