Sushant Yadav
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Sushant Yadav has a total of 10 co-authors. Here are the top co-authors by number of shared publications:
- Rahul Srivastava
Department of Physics, Indian Institute of Science Education and Research—Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, India
6 shared publications - Ranjeet Kumar
Seoul National University of Science and Technology
3 shared publications - Salvador Centelles Chuliá
Instituto de Fisica Corpuscular
3 shared publications - Hemant Prajapati
Indian Institute of Science Education and Research - Bhopal
2 shared publications Rahul Srivastava
Indian Institute of Science Education and Research - Bhopal
2 shared publications- Labh Singh
Central University of Himachal Pradesh
1 shared publication
Latest Publications
- Open Access
- 17 November 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (11) , 94
Flavor imprints on novel low mass dark matter
A bstract: We present a Majorana scotogenic-like loop framework in which neutrino mass generation and dark matter stability are intrinsically connected to the breaking of the discrete flavor symmetry A 4 . This breaking leads to the emergence of the scoto-seesaw mechanism and a Z 2 symmetry. This naturally explains the solar and atmospheric mass-squared differences, $$ \Delta {m}_{\textrm{sol}}^2 $$ and $$ \Delta {m}_{\textrm{atm}}^2 $$ , while simultaneously ensuring dark matter stability. Our model accommodates normal ordering of neutrino masses, with a generalized μ - τ reflection symmetry shaping the structure of leptonic mixing and a lower limit on the lightest neutrino mass. Moreover, the model provides predictions for the octant of θ 23 and a strong correlation between $$ \Delta {m}_{\textrm{sol}}^2 $$ and $$ \Delta {m}_{\textrm{atm}}^2 $$ . This correlation puts a lower bound on the fermionic DM mass. In contrast, scalar dark matter remains viable over a broad mass spectrum. A notable feature is that the low mass regime (~ 15 GeV onwards) survives owing to the presence of efficient co-annihilation channels, which are typically absent in the Majorana scotogenic scenario. Additionally, the model aligns with current and future limits from lepton flavor violation experiments.- 17 November 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (11) , 94
Open AccessFlavor imprints on novel low mass dark matter
A bstract: We present a Majorana scotogenic-like loop framework in which neutrino mass generation and dark matter stability are intrinsically connected to the breaking of the discrete flavor symmetry A 4 . This breaking leads to the emergence of the scoto-seesaw mechanism and a Z 2 symmetry. This naturally explains the solar and atmospheric mass-squared differences, $$ \Delta {m}_{\textrm{sol}}^2 $$ and $$ \Delta {m}_{\textrm{atm}}^2 $$ , while simultaneously ensuring dark matter stability. Our model accommodates normal ordering of neutrino masses, with a generalized μ - τ reflection symmetry shaping the structure of leptonic mixing and a lower limit on the lightest neutrino mass. Moreover, the model provides predictions for the octant of θ 23 and a strong correlation between $$ \Delta {m}_{\textrm{sol}}^2 $$ and $$ \Delta {m}_{\textrm{atm}}^2 $$ . This correlation puts a lower bound on the fermionic DM mass. In contrast, scalar dark matter remains viable over a broad mass spectrum. A notable feature is that the low mass regime (~ 15 GeV onwards) survives owing to the presence of efficient co-annihilation channels, which are typically absent in the Majorana scotogenic scenario. Additionally, the model aligns with current and future limits from lepton flavor violation experiments. - Open Access
- 13 November 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 112 (9)
Type-III scotogenic model: Inflation, dark matter, and collider phenomenology
We explore an extension of the type-III scotogenic model through the inclusion of a real scalar singlet, which play the role of the inflaton by virtue of its nonminimal coupling to the Ricci scalar. This scalar field not only drives inflation but also decays into other particles embedded within the type-III scotogenic framework. Within this theoretical structure, both the inert scalar doublet and the fermionic triplet are instrumental in radiatively generating neutrino masses, while also emerging as viable candidates for dark matter component of the Universe. We conduct a detailed analysis of their relic abundance and assess their prospects for direct detection. Additionally, we examine the potential collider signatures associated with this framework, emphasizing avenues for experimental verification in forthcoming high energy physics experiments. Owing to the suppressed production cross section of the fermionic triplet at the LHC, we extend our analysis to the Future Circular Collider in its hadron-hadron mode (FCC-hh). Within this context, we identify the monoleptonic decay channel of the triplet fermion, accompanied by substantial missing transverse energy, as a salient and experimentally distinguishable signature of the model. Furthermore, our study reveals that the leading-order production cross section of low-mass scalar dark matter lies within the prospective sensitivity reach of both leptonic and hadronic collider experiments, thereby offering promising avenues for experimental scrutiny.
- 13 November 2025
- Published by American Physical Society (APS) in Physical Review D
- Vol. 112 (9)
Open AccessType-III scotogenic model: Inflation, dark matter, and collider phenomenology
We explore an extension of the type-III scotogenic model through the inclusion of a real scalar singlet, which play the role of the inflaton by virtue of its nonminimal coupling to the Ricci scalar. This scalar field not only drives inflation but also decays into other particles embedded within the type-III scotogenic framework. Within this theoretical structure, both the inert scalar doublet and the fermionic triplet are instrumental in radiatively generating neutrino masses, while also emerging as viable candidates for dark matter component of the Universe. We conduct a detailed analysis of their relic abundance and assess their prospects for direct detection. Additionally, we examine the potential collider signatures associated with this framework, emphasizing avenues for experimental verification in forthcoming high energy physics experiments. Owing to the suppressed production cross section of the fermionic triplet at the LHC, we extend our analysis to the Future Circular Collider in its hadron-hadron mode (FCC-hh). Within this context, we identify the monoleptonic decay channel of the triplet fermion, accompanied by substantial missing transverse energy, as a salient and experimentally distinguishable signature of the model. Furthermore, our study reveals that the leading-order production cross section of low-mass scalar dark matter lies within the prospective sensitivity reach of both leptonic and hadronic collider experiments, thereby offering promising avenues for experimental scrutiny.
- Open Access
- 10 October 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (10) , 1-33
Dirac Scoto inverse-seesaw from A4 flavor symmetry
A bstract: We present a Dirac scotogenic-like one loop radiative model where the stability of dark matter is intricately linked to the breaking of A 4 flavor symmetry. This breaking induces a $$ {\mathcal{Z}}_2 $$ dark symmetry, stabilizing the dark matter candidate. The breaking of A 4 → $$ {\mathcal{Z}}_2 $$ leads to cutting the loop and facilitating a “scoto inverse-seesaw” mass mechanism responsible for neutrino mass generation. This elucidates the explicit explanation of two mass-squared differences, $$ \Delta {m}_{\textrm{atm}}^2 $$ and $$ \Delta {m}_{\textrm{sol}}^2 $$ observed in neutrino oscillations. Our model accounts for normal and inverted ordering of neutrino masses, revealing sharp correlations between ∑ m i and 〈 m β 〉. It also shows strong compatibility with current data in the δ CP – θ 23 plane. Moreover, stringent constraints on scalar masses narrow down the viable dark matter mass regions, accommodating SU(2) L singlet and doublet scalar dark matter as well as fermionic dark matter. Additionally, our model presents a viable avenue for addressing lepton flavor violating decays while remaining consistent with current experimental constraints.- 10 October 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (10) , 1-33
Open AccessDirac Scoto inverse-seesaw from A4 flavor symmetry
A bstract: We present a Dirac scotogenic-like one loop radiative model where the stability of dark matter is intricately linked to the breaking of A 4 flavor symmetry. This breaking induces a $$ {\mathcal{Z}}_2 $$ dark symmetry, stabilizing the dark matter candidate. The breaking of A 4 → $$ {\mathcal{Z}}_2 $$ leads to cutting the loop and facilitating a “scoto inverse-seesaw” mass mechanism responsible for neutrino mass generation. This elucidates the explicit explanation of two mass-squared differences, $$ \Delta {m}_{\textrm{atm}}^2 $$ and $$ \Delta {m}_{\textrm{sol}}^2 $$ observed in neutrino oscillations. Our model accounts for normal and inverted ordering of neutrino masses, revealing sharp correlations between ∑ m i and 〈 m β 〉. It also shows strong compatibility with current data in the δ CP – θ 23 plane. Moreover, stringent constraints on scalar masses narrow down the viable dark matter mass regions, accommodating SU(2) L singlet and doublet scalar dark matter as well as fermionic dark matter. Additionally, our model presents a viable avenue for addressing lepton flavor violating decays while remaining consistent with current experimental constraints. - Open Access
- 3 April 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (4) , 1-40
Comprehensive phenomenology of the Dirac Scotogenic Model: Novel low-mass dark matter
The Dirac Scotogenic model provides an elegant mechanism for generating small Dirac neutrino masses at the one-loop level. A single abelian discrete $$ {\mathcal{Z}}_6 $$ symmetry simultaneously protects the “Diracness” of the neutrinos and the stability of the dark matter candidate. This symmetry originates as an unbroken subgroup of the so-called 445 U(1) B−L symmetry. Here, we thoroughly explore the phenomenological implications of this construction, including an analysis of electroweak vacuum stability, charged lepton flavor violation, and the dark matter phenomenology. After considering all constraints, we also show that the model allows for the possibility of novel low-mass scalar and fermionic dark matter, a feature not shared by its canonical Majorana counterpart.- 3 April 2025
- Published by Springer Nature in Journal of High Energy Physics
- Vol. 2025 (4) , 1-40
Open AccessComprehensive phenomenology of the Dirac Scotogenic Model: Novel low-mass dark matter
The Dirac Scotogenic model provides an elegant mechanism for generating small Dirac neutrino masses at the one-loop level. A single abelian discrete $$ {\mathcal{Z}}_6 $$ symmetry simultaneously protects the “Diracness” of the neutrinos and the stability of the dark matter candidate. This symmetry originates as an unbroken subgroup of the so-called 445 U(1) B−L symmetry. Here, we thoroughly explore the phenomenological implications of this construction, including an analysis of electroweak vacuum stability, charged lepton flavor violation, and the dark matter phenomenology. After considering all constraints, we also show that the model allows for the possibility of novel low-mass scalar and fermionic dark matter, a feature not shared by its canonical Majorana counterpart. - 1 January 2025
- Published by Springer Nature
- p. 401-405
Comprehensive Phenomenology of the Dirac Scotogenic Model: Novel Low Mass Dark Matter
- 1 January 2025
- Published by Springer Nature
- p. 401-405
Comprehensive Phenomenology of the Dirac Scotogenic Model: Novel Low Mass Dark Matter
- Open Access
Dark Matter Escaping Direct Detection Runs into Higgs Mass Hierarchy Problem
The current generation of Dark Matter Direct Detection Experiments has ruled out a large region of parameter space for dark matter, particularly in the ($10 - 1000$) GeV mass range. However, due to very low event rates, searching for dark matter in the heavy mass range, $\mathcal{O}$(TeV), is a daunting task requiring even larger volume detectors and long exposure times. We show that for a broad class of dark matter models of the type that these experiments are searching, including some of the most popular candidates, the heavy dark matter mass range can be ruled out in its entirety once we take into account the large corrections to Higgs mass imparted by such heavy dark matter. We show that such a limit is applicable to all types of dark matter i.e. scalar, vector, and fermionic, provided they couple directly with Higgs. By taking some simple and well studied dark matter models we show that the latest LZ limits can completely rule out such a dark matter except in a narrow range around $M_h/2$ mass.Open AccessDark Matter Escaping Direct Detection Runs into Higgs Mass Hierarchy Problem
The current generation of Dark Matter Direct Detection Experiments has ruled out a large region of parameter space for dark matter, particularly in the ($10 - 1000$) GeV mass range. However, due to very low event rates, searching for dark matter in the heavy mass range, $\mathcal{O}$(TeV), is a daunting task requiring even larger volume detectors and long exposure times. We show that for a broad class of dark matter models of the type that these experiments are searching, including some of the most popular candidates, the heavy dark matter mass range can be ruled out in its entirety once we take into account the large corrections to Higgs mass imparted by such heavy dark matter. We show that such a limit is applicable to all types of dark matter i.e. scalar, vector, and fermionic, provided they couple directly with Higgs. By taking some simple and well studied dark matter models we show that the latest LZ limits can completely rule out such a dark matter except in a narrow range around $M_h/2$ mass. - Open Access
CDF-II W boson mass in the Dirac Scotogenic model
The Dirac scotogenic model provides an elegant mechanism which explains small Dirac neutrino masses and neutrino mixing, with a single symmetry simultaneously protecting the ``Diracness'' of the neutrinos and the stability of the dark matter candidate. Here we explore the phenomenological implications of the recent CDF-II measurement of the $W$ boson mass in the Dirac scotogenic framework. We show that, in the scenario where the dark matter is mainly a $SU(2)_L$ scalar doublet, it cannot concurrently satisfy: (a) the dark matter relic density (b) the $m_W$ anomaly and (c) the direct detection constraints. However, unlike the Majorana scotogenic model, the Dirac version also has a ``dark sector'' $SU(2)_L$ singlet scalar. We show that if the singlet scalar is the lightest dark sector particle i.e. the dark matter, then all neutrino physics and dark matter constraints along with the constraints from oblique $S$, $T$ and $U$ parameters can be concurrently satisfied for $W$ boson mass in CDF-II mass range.Open AccessCDF-II W boson mass in the Dirac Scotogenic model
The Dirac scotogenic model provides an elegant mechanism which explains small Dirac neutrino masses and neutrino mixing, with a single symmetry simultaneously protecting the ``Diracness'' of the neutrinos and the stability of the dark matter candidate. Here we explore the phenomenological implications of the recent CDF-II measurement of the $W$ boson mass in the Dirac scotogenic framework. We show that, in the scenario where the dark matter is mainly a $SU(2)_L$ scalar doublet, it cannot concurrently satisfy: (a) the dark matter relic density (b) the $m_W$ anomaly and (c) the direct detection constraints. However, unlike the Majorana scotogenic model, the Dirac version also has a ``dark sector'' $SU(2)_L$ singlet scalar. We show that if the singlet scalar is the lightest dark sector particle i.e. the dark matter, then all neutrino physics and dark matter constraints along with the constraints from oblique $S$, $T$ and $U$ parameters can be concurrently satisfied for $W$ boson mass in CDF-II mass range.