Bhaskar Dutta
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View article: Primordial Black Holes at the Junction
Primordial Black Holes at the Junction Open
Primordial black holes (PBHs) formed during first-order phase transitions provide a powerful link between the early-universe microphysics and observable signatures today, including dark matter and gravitational waves. In this work we devel…
View article: MINER reactor based search for axionlike particles using sapphire (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mtext>Al</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></mml:msub></mml:math>) detectors
MINER reactor based search for axionlike particles using sapphire () detectors Open
The absence of definitive results for WIMP dark matter has sparked growing interest in alternative dark matter candidates, such as axions and axionlike particles (ALPs), which also provide insight into the strong CP problem. The Mitchell I…
View article: Dark Matter Internal Pair Production: A Novel Direct Detection Mechanism
Dark Matter Internal Pair Production: A Novel Direct Detection Mechanism Open
We introduce a new dark matter detection mechanism, dark matter internal pair production (DIPP), to detect dark matter candidates at beam dump facilities. When energetic dark matter scatters in a material, it can create a lepton-antilepton…
View article: Opening up New Parameter Space for Sterile Neutrino Dark Matter
Opening up New Parameter Space for Sterile Neutrino Dark Matter Open
Sterile neutrinos are compelling dark matter (DM) candidates, yet the minimal production mechanism solely based on active ($ν_a$)-sterile ($ν_s$) oscillations is excluded by astrophysical observations. Non-standard self-interactions in eit…
View article: Dirt/Detector/Dump: complementary BSM production at Short-Baseline Neutrino Facilities
Dirt/Detector/Dump: complementary BSM production at Short-Baseline Neutrino Facilities Open
A bstract Short-baseline neutrino (SBN) facilities are optimal for new-physics searches, including the possible production of new particles in and along the neutrino beamline. One such class of models considers states that are created by n…
View article: `Dark' Matter Effect as a Novel Solution to the KM3-230213A Puzzle
`Dark' Matter Effect as a Novel Solution to the KM3-230213A Puzzle Open
The recent KM3NeT observation of an ${\cal{O}}(100~{\rm PeV})$ event KM3-230213A is puzzling because IceCube with much larger effective area times exposure has not found any such events. We propose a novel solution to this conundrum in ter…
View article: Primordial black holes from Q-balls produced in a first-order phase transition
Primordial black holes from Q-balls produced in a first-order phase transition Open
We consider the formation of Q-balls in false vacuum remnants during a cosmological first-order phase transition. We find that under certain circumstances Q-balls can collapse to form primordial black holes. This scenario can produce multi…
View article: Photon Excess from Dark Matter and Neutrino Scattering at MiniBooNE and MicroBooNE
Photon Excess from Dark Matter and Neutrino Scattering at MiniBooNE and MicroBooNE Open
We propose new solutions to accommodate both the MiniBooNE electron-like and MicroBooNE photon low-energy excesses, based on interactions involving light dark matter and/or neutrinos. The novelty of our proposal lies in the utilization of …
View article: Enhancing the sensitivity to seesaw mechanism predictions in gauged <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>−</mml:mo><mml:mi>L</mml:mi></mml:math> scenarios
Enhancing the sensitivity to seesaw mechanism predictions in gauged scenarios Open
New gauge bosons coupled to heavy neutral leptons (HNLs) are simple and well-motivated extensions of the Standard Model. In searches for HNLs in proton fixed-target experiments, we find that a large population of gauge bosons (Z′) produced…
View article: Hybrid SO(10) Axion Model without Quality Problem
Hybrid SO(10) Axion Model without Quality Problem Open
Invisible axion models that solve the strong CP problem via the Peccei-Quinn (PQ) mechanism typically have a quality problem that arises from quantum gravity effects which violate all global symmetries. These models therefore require extre…
View article: Imprints of early universe cosmology on gravitational waves
Imprints of early universe cosmology on gravitational waves Open
A bstract We explore the potential of gravitational waves (GWs) to probe the pre-BBN era of the early universe, focusing on the effects of energy injection. Specifically, we examine a hidden sector alongside the Standard Model that undergo…
View article: Addendum to “Testing meson portal dark sector solutions to the MiniBooNE anomaly at CCM”
Addendum to “Testing meson portal dark sector solutions to the MiniBooNE anomaly at CCM” Open
In Aguilar-Arevalo [], we explored various effective field theories that could explain the MiniBooNE excess involving long-lived particles produced from charged meson decays and the sensitivity of the Coherent CAPTAIN Mills experiment to t…
View article: Light in the shadows: primordial black holes making dark matter shine
Light in the shadows: primordial black holes making dark matter shine Open
A bstract We consider the possibility of indirect detection of dark sector processes by investigating a novel form of interaction between ambient dark matter (DM) and primordial black holes (PBHs). The basic scenario we envisage is that th…
View article: Probing Light Particles With Optically Trapped Sensors Through Nucleon Scattering
Probing Light Particles With Optically Trapped Sensors Through Nucleon Scattering Open
Optically levitated nanospheres are highly sensitive to the motion of their center of mass even under small momentum transfer. We propose detecting exotic particles via nucleon scattering in such spheres in the context of an ongoing experi…
View article: Proposal to use LHC general-purpose detectors in “beam-dump” measurements for long-lived particles
Proposal to use LHC general-purpose detectors in “beam-dump” measurements for long-lived particles Open
We propose a novel scheme for performing a beam-dump-like experiment with the general-purpose detectors (ATLAS and CMS) at the LHC. Collisions of high-energy protons result in jets containing a number of energetic hadrons and electromagnet…
View article: Accidental Peccei-Quinn Symmetry From Gauged U(1) and a High Quality Axion
Accidental Peccei-Quinn Symmetry From Gauged U(1) and a High Quality Axion Open
We construct explicit models that solve the axion quality problem originating from quantum gravitational effects. The general strategy we employ is to supplement the Standard Model and its grand unified extensions by an anomaly-free axial …
View article: Heavy Neutral Leptons via Axionlike Particles at Neutrino Facilities
Heavy Neutral Leptons via Axionlike Particles at Neutrino Facilities Open
Heavy neutral leptons (HNLs) are often among the hypothetical ingredients behind nonzero neutrino masses. If sufficiently light, they can be produced and detected in fixed-target-like experiments. We show that if the HNLs belong to a riche…
View article: Supersymmetric gauged $ \\mathrm{U}{(1)}_{L_{\\mu }-{L}_{\\tau }} $ model for electron and muon (g - 2) anomaly
Supersymmetric gauged $ \\mathrm{U}{(1)}_{L_{\\mu }-{L}_{\\tau }} $ model for electron and muon (g - 2) anomaly Open
Minimal gauged models can provide for an additional source for the muon anomalous magnetic moment however it is difficult to accommodate the discrepancy in the electron magnetic moment in tandem. Owing to the relative sign between the dis…
View article: A global analysis strategy to resolve neutrino NSI degeneracies with scattering and oscillation data
A global analysis strategy to resolve neutrino NSI degeneracies with scattering and oscillation data Open
Neutrino non-standard interactions (NSI) with the first generation of standard model fermions can span a parameter space of large dimension and exhibit degeneracies that cannot be broken by a single class of experiment. Oscillation experim…
View article: Imprints of Early Universe Cosmology on Gravitational Waves
Imprints of Early Universe Cosmology on Gravitational Waves Open
We explore the potential of gravitational waves (GWs) to probe the pre-BBN era of the early universe, focusing on the effects of energy injection. Specifically, we examine a hidden sector alongside the Standard Model that undergoes a stron…
View article: Novel approach to investigate ATOMKI anomaly using Coherent CAPTAIN-Mills detectors
Novel approach to investigate ATOMKI anomaly using Coherent CAPTAIN-Mills detectors Open
ATOMKI nuclear anomaly has suggested a new BSM (Beyond the Standard Model) boson with mass $\sim17$ MeV emitted from excited nuclei and quickly decays into a pair of $e^+e^-$. In order to search for the new particle, we propose a new appro…
View article: Prospects for Light Dark Matter Searches at Large-Volume Neutrino Detectors
Prospects for Light Dark Matter Searches at Large-Volume Neutrino Detectors Open
We propose a new approach to search for light dark matter (DM), with keV–GeV mass, via inelastic nucleus scattering at large-volume neutrino detectors such as Borexino, DUNE, Super-K, Hyper-K, and JUNO. The approach uses inelastic nuclear …
View article: Enhancing the Sensitivity to Seesaw Predictions in Gauged $B-L$ Scenarios
Enhancing the Sensitivity to Seesaw Predictions in Gauged $B-L$ Scenarios Open
New gauge bosons coupled to heavy neutral leptons (HNLs) are simple and well-motivated extensions of the Standard Model. In searches for HNLs in proton fixed-target experiments, we find that a large population of gauge bosons ($Z^\prime$) …
View article: Hybrid SO(10) Axion Model Without Quality Problem
Hybrid SO(10) Axion Model Without Quality Problem Open
Invisible axion models that solve the strong CP problem via the Peccei-Quinn (PQ) mechanism typically have a quality problem that arises from quantum gravity effects which violate all global symmetries. These models therefore require extre…
View article: Short baseline neutrino anomalies at stopped pion experiments
Short baseline neutrino anomalies at stopped pion experiments Open
A bstract Stopped-pion experiments that measure coherent elastic neutrino-nucleus scattering (CE ν NS) are sensitive to sterile neutrinos via disappearance. Using timing and energy spectra to perform flavor decomposition, we show that the …
View article: New physics at a neutron beam dump
New physics at a neutron beam dump Open
We find a new utility of neutrons, usually treated as an experimental nuisance causing unwanted background, in probing new physics signals. The new physics signals can either be radiated from neutrons (neutron bremsstrahlung) or appear thr…