Publications (57)
Testing non-standard neutrino properties
Manibrata Sen
Neutrinos provide a compelling avenue to explore physics beyond the Standard Model. This proceeding is a brief summary of a plenary talk given at the 12th Neutrino Oscillation Work…
Bose-enhanced Neutrino Decays in a Thermal Medium
Yuber F. Perez-Gonzalez, Manibrata Sen, Walter Tangarife
We compute the decay width of neutrinos in a thermal medium using finite-temperature quantum field theory, focusing on non-standard decays into lighter neutrinos and a scalar or li…
Can Dark Matter be an artifact of extended theories of gravity?
Sayantan Choudhury, Manibrata Sen, Soumya Sadhukhan
In this article, we propose different background models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of genesis of dark…
Emergent Large Lepton Mixing from Neutrino Refraction in Dark Matter
Susobhan Chattopadhyay, Yuber F. Perez-Gonzalez, Manibrata Sen
We propose a novel origin for the disparity between quark and lepton flavor mixing based on the refractive nature of neutrino masses. We postulate that the fundamental mixing in bo…
Boosted dark matter from diffuse supernova neutrinos
Anirban Das, Manibrata Sen
The XENON collaboration recently reported an excess of electron recoil events in the low energy region with a significance of around . An explanation of this excess in terms…
Exploiting a future galactic supernova to probe neutrino magnetic moments
Sudip Jana, Yago P Porto-Silva, Manibrata Sen
A core-collapse supernova (SN) offers an excellent astrophysical laboratory to test non-zero neutrino magnetic moments. In particular, the neutronization burst phase, which lasts f…
Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal
Guo-yuan Huang, Manfred Lindner, Pablo MartÃnez-Miravé +1
We investigate a consistent scenario of time-varying neutrino masses, and discuss its impact on cosmology, beta decay, and neutrino oscillation experiments. Such time-varying masse…
Core-collapse Supernova Constraint on the Origin of Sterile Neutrino Dark Matter via Neutrino Self-interactions
Yu-Ming Chen, Manibrata Sen, Walter Tangarife +2
Novel neutrino self-interaction can open up viable parameter space for the relic abundance of sterile-neutrino dark matter (SDM). In this work, we constrain the relic target us…
Implications of a matter-antimatter mass asymmetry in Penning-trap experiments
Ting Cheng, Manfred Lindner, Manibrata Sen
The Standard Model (SM) of particle physics, being a local, unitary and Lorentz-invariant quantum field theory, remains symmetric under the combined action of Charge, Parity, and T…
A few moments to diagnose fast flavor conversions of supernova neutrinos
Basudeb Dasgupta, Alessandro Mirizzi, Manibrata Sen
Neutrinos emitted from a supernova may undergo flavor conversions almost immediately above the core, with possible consequences for supernova dynamics and nucleosynthesis. However,…
Supernova Neutrinos: flavour conversion mechanisms and new physics scenarios
Manibrata Sen
A core-collapse supernova (SN) releases almost all of its energy in the form of neutrinos, which provide a unique opportunity to probe the working machinery of a SN. These sites ar…
Fundamental physics with the diffuse supernova background neutrinos
André de Gouvêa, Ivan Martinez-Soler, Yuber F. Perez-Gonzalez +1
The Universe is awash with tens-of-MeV neutrinos of all species coming from all past core-collapse supernovae. These have never been observed, but this state of affairs will change…
Non-standard neutrino self-interactions in a supernova and fast flavor conversions
Amol Dighe, Manibrata Sen
We study the effects of non-standard self-interactions (NSSI) of neutrinos streaming out of a core-collapse supernova. We show that with NSSI, the standard linear stability analysi…
Supernova fast flavor conversions in 1+1D : Influence of mu-tau neutrinos
Francesco Capozzi, Madhurima Chakraborty, Sovan Chakraborty +1
In the dense supernova environment, neutrinos can undergo fast flavor conversions which depend on the large neutrino-neutrino interaction strength. It has been recently shown that…
SN1987A still shining: A Quest for Pseudo-Dirac Neutrinos
Ivan Martinez-Soler, Yuber F. Perez-Gonzalez, Manibrata Sen
Ever since the discovery of neutrinos, we have wondered if neutrinos are their own antiparticles. One remarkable possibility is that neutrinos have a pseudo-Dirac nature, predictin…
Sterile neutrino dark matter production in presence of non-standard neutrino self-interactions: an EFT approach
Cristina Benso, Werner Rodejohann, Manibrata Sen +1
Sterile neutrinos with keV-scale masses are popular candidates for warm dark matter. In the most straightforward case they are produced via oscillations with active neutrinos. We i…
Neutrinos with refractive masses and the DESI BAO results
Manibrata Sen, Alexei Y. Smirnov
Due to interactions with dark matter, neutrinos can acquire refractive masses which explain the data from oscillation experiments. We study the effects of relic neutrinos with refr…
New effects of non-standard self-interactions of neutrinos in a supernova
Anirban Das, Amol Dighe, Manibrata Sen
Neutrino self-interactions are known to lead to non-linear collective flavor oscillations in a core-collapse supernova. We point out new possible effects of non-standard self-inter…
Potential Impact of Fast Flavor Oscillations on Neutrino-driven Winds and Their Nucleosynthesis
Zewei Xiong, Andre Sieverding, Manibrata Sen +1
The wind driven by the intense neutrino emission from a protoneutron star (PNS) is an important site for producing nuclei heavier than the Fe group. Because of certain features in…
From Extended theories of Gravity to Dark Matter
Sayantan Choudhury, Manibrata Sen, Soumya Sadhukhan
In this work, we propose different models of extended theories of gravity, which are minimally coupled to the SM fields, to explain the possibility of a dark matter (DM) candidate,…
Dark Matter Capture in Supernovae Modifies Dark Photon Cooling Bounds
Aritra Gupta, Manibrata Sen
Core-collapse supernovae serve as powerful probes of light, weakly coupled particles, such as dark photons. The conventional SN1987A cooling bound constrains the dark photon mass-m…
Intimate Relationship Between Sterile Neutrino Dark Matter and
Kevin J. Kelly, Manibrata Sen, Yue Zhang
The self-interacting neutrino hypothesis is well motivated for addressing the tension between the origin of sterile neutrino dark matter and indirect detection constraints. It can…
Charged Lepton Flavor Violation at Neutrino Telescopes
Writasree Maitra, Carlos A. Argüelles, P. S. Bhupal Dev +2
Any observation of charged lepton flavor violation (CLFV) would be a clear signal of beyond-the-Standard-Model physics. Here, we propose a novel CLFV search using neutrino telescop…
Origin of Sterile Neutrino Dark Matter via Vector Secret Neutrino Interactions
Kevin J. Kelly, Manibrata Sen, Walter Tangarife +1
Secret neutrino interactions can play an essential role in the origin of dark matter. We present an anatomy of production mechanisms for sterile neutrino dark matter, a keV-scale g…
Flavoured leptogenesis and symmetry
Rome Samanta, Manibrata Sen
We present a systematic study of leptogenesis in neutrino mass models with -flavoured CP symmetry. In addition to the strong hierarchical -dominated scenario (DS) i…
Supernova neutrinos: fast flavor conversions near the core
Manibrata Sen
Neutrino flux streaming from a supernova can undergo rapid flavor conversions almost immediately above the core. Focusing on this region, we study these fast conversions using a li…
Fast Neutrino Flavor Conversion as Oscillations in a Quartic Potential
Basudeb Dasgupta, Manibrata Sen
Neutrinos in dense environments undergo collective pair conversions , where is a non-electron flavor, due to forward scattering off e…
Fast Flavor Transformations
Sherwood Richers, Manibrata Sen
The neutrino fast flavor instability (FFI) can change neutrino flavor on time scales of nanoseconds and length scales of centimeters. It is expected to be ubiquitous in core-collap…
Sterile neutrino dark matter, neutrino secret self-interactions, and extra radiation
Manibrata Sen
keV scale sterile neutrinos are excellent warm dark matter candidates. In the early Universe, these can be produced from oscillations and scatterings of active neutrinos. However,…
Fast neutrino flavor conversions near the supernova core with realistic flavor-dependent angular distributions
Basudeb Dasgupta, Alessandro Mirizzi, Manibrata Sen
It has been recently pointed out that neutrino fluxes from a supernova can show substantial flavor conversions almost immediately above the core. Using linear stability analyses an…
Refractive neutrino masses, ultralight dark matter and cosmology
Manibrata Sen, Alexei Y. Smirnov
We consider in detail a possibility that the observed neutrino oscillations are due to refraction on ultralight scalar boson dark matter. We introduce the refractive mass squared,…
Dynamic Neutrino Mass Ordering and Its Imprint on the Diffuse Supernova Neutrino Background
Yuber F. Perez-Gonzalez, Manibrata Sen
Neutrino masses may have evolved dynamically throughout the history of the Universe, potentially leading to a mass spectrum distinct from the normal or inverted ordering observed t…
Attenuation of Cosmic Ray Electron Boosted Dark Matter
Tim Herbermann, Manfred Lindner, Manibrata Sen
We consider a model of boosted dark matter (DM), where a fraction of DM is upscattered to relativistic energies by cosmic ray electrons. Such interactions responsible for boosting…
Fast Neutrino Flavor Instability in the Neutron-star Convection Layer of Three-dimensional Supernova Models
Robert Glas, H. -Thomas Janka, Francesco Capozzi +4
Neutrinos from a supernova (SN) might undergo fast flavor conversions near the collapsed stellar core. We perform a detailed study of this intriguing possibility, analyzing time-de…
From Dirac to Majorana: the Cosmic Neutrino Background capture rate in the minimally extended Standard Model
Yuber F. Perez-Gonzalez, Manibrata Sen
We investigate the capture rate of the cosmic neutrino background on tritium within the Standard Model, extended to incorporate three right-handed singlet neutrinos with explicit l…
Fast flavor conversions in supernovae: the rise of mu-tau neutrinos
Francesco Capozzi, Madhurima Chakraborty, Sovan Chakraborty +1
Neutrinos in a core-collapse supernova can undergo fast flavor conversions with a possible impact on the explosion mechanism and nucleosynthesis. We perform the first non-linear si…
Consequences of neutrino self interactions for weak decoupling and big bang nucleosynthesis
E. Grohs, George M. Fuller, Manibrata Sen
We calculate and discuss the implications of neutrino self-interactions for the physics of weak decoupling and big bang nucleosynthesis (BBN) in the early universe. In such neutrin…
Visible Neutrino Decays and the Impact of the Daughter-Neutrino Mass
André de Gouvêa, Manibrata Sen, Jean Weill
We compute the differential decay width of two- and three-body neutrino decays, assuming neutrinos are Dirac fermions and allowing for the possibility that the decay-daughters have…
Accessible Lepton-Number-Violating Models and Negligible Neutrino Masses
André de Gouvêa, Wei-Chih Huang, Johannes König +1
Lepton-number violation (LNV), in general, implies nonzero Majorana masses for the Standard Model neutrinos. Since neutrino masses are very small, for generic candidate models of t…
Probing long-range forces with supernova neutronization burst neutrinos
Amol Dighe, Sadashiv Sahoo, Manibrata Sen
Ultralight gauge bosons associated with flavour-dependent leptonic symmetries generate long-range potentials that can modify neutrino flavour evolution over astrophysical distances…
Neutrino secret self-interactions: a booster shot for the cosmic neutrino background
Anirban Das, Yuber F. Perez-Gonzalez, Manibrata Sen
Neutrinos might interact among themselves through forces that have so far remained hidden. Throughout the history of the Universe, such \emph{secret} interactions could lead to sca…
Neutrino Self-Interactions: A White Paper
Jeffrey M. Berryman, Nikita Blinov, Vedran Brdar +31
Neutrinos are the Standard Model (SM) particles which we understand the least, often due to how weakly they interact with the other SM particles. Beyond this, very little is known…
The diffuse supernova neutrino background as a probe of late-time neutrino mass generation
André de Gouvêa, Ivan Martinez-Soler, Yuber F. Perez-Gonzalez +1
The relic neutrinos from old supernova explosions are among the most ancient neutrino fluxes within experimental reach. Thus, the diffuse supernova neutrino background (DSNB) could…
On the Impact of Neutrino Decays on the Supernova Neutronization-Burst Flux
André de Gouvêa, Ivan Martinez-Soler, Manibrata Sen
The discovery of non-zero neutrino masses invites one to consider decays of heavier neutrinos into lighter ones. We investigate the impact of two-body decays of neutrinos on the ne…
Solar neutrinos and visible decays to
André de Gouvêa, Jean Weill, Manibrata Sen
Experimental bounds on the neutrino lifetime depend on the nature of the neutrinos and the details of the potentially new physics responsible for neutrino decay. In the case where…
Energy-dependent Boosted Dark Matter from Diffuse Supernova Neutrino Background
Anirban Das, Tim Herbermann, Manibrata Sen +1
Diffuse neutrinos from past supernovae in the Universe present us with a unique opportunity to test dark matter (DM) interactions. These neutrinos can scatter and boost the DM part…
Mixed WIMP-axion dark matter
Suman Chatterjee, Anirban Das, Tousik Samui +1
We study the experimental constraints on a model of a two-component dark matter, consisting of the QCD axion, and a scalar particle, both contributing to the dark matter relic abun…
Collisional triggering of fast flavor conversions of supernova neutrinos
Francesco Capozzi, Basudeb Dasgupta, Alessandro Mirizzi +2
Fast flavor conversions of supernova neutrinos, possible near the neutrinosphere, depends on an interesting interplay of collisions and neutrino oscillations. Contrary to naive exp…
Shedding light on dark matter spikes through refractive neutrino masses
Federica Pompa, Manibrata Sen
The origin of neutrino mass remains an open question in particle physics. One intriguing possibility is that neutrinos are massless in vacuum but acquire an effective refractive ma…
On probing turbulence in core-collapse supernovae in upcoming neutrino detectors
Mainak Mukhopadhyay, Manibrata Sen
Neutrino propagation through a turbulent medium can be highly non-adiabatic leading to distinct signatures in the survival probabilities. A core-collapse supernova can be host to a…
Effects of Neutrino-Ultralight Dark Matter Interaction on the Cosmic Neutrino Background
Pablo MartÃnez-Miravé, Yuber F. Perez-Gonzalez, Manibrata Sen
Ultralight dark matter interacting with sterile neutrinos would modify the evolution and properties of the cosmic neutrino background through active-sterile neutrino mixing. We inv…
Amplifying muon-to-positron conversion in nuclei with ultralight dark matter
Purushottam Sahu, Manibrata Sen
We present an analysis of the lepton-number and lepton-flavour-violating process of muon-to-positron conversion , in the presence of an ultralight sc…
Hunting Sterile Neutrino Dark Matter in the MeV Gap
Shivam Gola, Akash Kumar Saha, Manibrata Sen
We investigate the sensitivities of upcoming MeV gamma-ray telescopes to sterile neutrino dark matter in the mass range . Sterile neutrinos in this regime can…
Light vector bosons and the weak mixing angle in the light of future germanium-based reactor CENS experiments
Manfred Lindner, Thomas Rink, Manibrata Sen
In this work, the sensitivity of future germanium-based reactor neutrino experiments to the weak mixing angle , and to the presence of new light vector bosons is in…
Constraints on pseudo-Dirac neutrinos using high-energy neutrinos from NGC 1068
Thomas Rink, Manibrata Sen
Neutrinos can be pseudo-Dirac in Nature - they can be Majorana fermions while behaving effectively as Dirac fermions. Such scenarios predict active-sterile neutrino oscillations dr…
Dodelson-Widrow Mechanism In the Presence of Self-Interacting Neutrinos
André de Gouvêa, Manibrata Sen, Walter Tangarife +1
keV-scale gauge-singlet fermions, allowed to mix with the active neutrinos, are elegant dark matter (DM) candidates. They are produced in the early universe via the Dodelson-Widrow…
Constraining pseudo-Dirac neutrinos from a galactic core-collapse supernova
Manibrata Sen
Neutrinos can be pseudo-Dirac in nature -- Majorana fermions behaving as Dirac fermions for all practical purposes. In such a scenario, active and sterile neutrinos are quasi-degen…