Author and Presenter: Bhupal Dev
Abstract: We will present an overview of neutrino mass models, covering Majorana, Dirac and quasi-Dirac possibilities, and their experimental signatures.
Author: Subhojit Roy
Co-authors: Pedro Bittar, Carlos Wagner
Presenter: Subhojit Roy
Abstract: An accurate description of the scalar potential at finite temperature is crucial for studying cosmo- logical first-order phase transitions (FOPT) in the early Universe. At finite temperatures, a precise treatment of thermal resummations is essential, as bosonic fields encounter significant...
Author and Presenter: Satya Seshavatharam Utpala Venkata
The existence of relic neutrino background is a strong prediction of the Big Bang cosmology. But because of their extremely small kinetic energy today, the direct detection of relic neutrinos remains elusive. On the other hand, we know very little about the nature of dark matter. In this work, we are putting constraint on the overdensity of the cosmic neutrino background by using them as the...
Axions or axion-like particles (ALPs) are hypothetical particles predicted by various BSM theories, which also make one of the dark matter candidates. If ALPs exist in nature, the CMB photons as they pass through galaxy clusters will convert to ALPs (of mass range
In this talk, we will discuss electroweak triplet contribution to SO(10) leptogenesis. The main result is that as long as triplet mass is near the
right-handed neutrino mass scale, this contribution can dominate, making it essential in assessing the viability of SO(10) leptogenesis scenarios.
We explore a simple and predictive dark matter scenario involving a complex scalar field,
We will present an overview of neutrino mass models, covering Majorana, Dirac and quasi-Dirac possibilities, and their experimental signatures.
FASER, and it's associated neutrino experiment FASER
The cosmic microwave background (CMB) provides a powerful probe of neutrinos and other relativistic species in the early universe. In this talk, I will present a robust, model-agnostic framework for detecting the unique phase shift imprinted in the CMB acoustic peaks by free-streaming particles. I will introduce two complementary methods, one leveraging the shifts in the observed power spectra...
In this talk, we present novel indirect-detection methods for constraining dark matter (DM) interactions using astrophysical bodies beyond traditional solar and terrestrial targets. First, we explore the potential of nearby white dwarfs (WDs) as probes of DM-nucleon interactions. By analyzing a sample of ten cold, isolated WDs within 13 pc and modeling their interiors, we estimate DM capture...
Hot plasma in astrophysical objects provides an ideal place for the production of heavy axion-like particles (ALPs). We show that a fraction of these ALPs could stream out of the photosphere and subsequently decay into two photons that can be potentially detected on or near the Earth. In particular, we estimate the photon flux originating from the spontaneous decay of heavy ALPs produced...
We present a new approach to the numerical evaluation of the effects of non-cold relics on the evolution of cosmological perturbations. The Boltzmann hierarchies used to compute the contributions of these relics to the stress-energy tensor are replaced with a set of integral equations. These integral equations take the form of convolutions and are solved iteratively coupled with Einstein's...
KM3NeT is a deep-sea research infrastructure with the main goals of studying neutrinos from the atmosphere and from the cosmos. A dense array of optical detectors, called KM3NeT/ORCA, currently being deployed in the Mediterranean Sea off the coast of Toulon, France, will measure fundamental neutrino properties primarily using the atmospheric neutrinos. A sparser and larger array, called...
PandaX is a dark matter and neutrino experiment at the China Jinping Underground Laboratory. The experiment uses a dual-phase liquid xenon TPC to search for dark matter particles and neutrinoless double-beta decay, as well as to detect astrophysical neutrinos. In this talk, recent results from the PandaX-4T experiment will be presented, including those from the latest dark matter searches,...
The Accelerator Neutrino Neutron Interaction Experiment (ANNIE) is a 26-ton gadolinium-doped water Cherenkov detector located at the Booster Neutrino Beam at Fermilab. ANNIE's primary physics goal is to measure the neutron multiplicity from neutrino-nucleus interactions in water, improving our understanding of neutrino interactions and helping reduce systematic uncertainties in future neutrino...
LSND and MiniBooNE have provided longstanding and statistically significant evidence of anomalous electron-like excesses. This has led to very significant theoretical and experimental activity aimed at understanding the origin of the signals. Recent results from MicroBooNE have sharpened the focus of these efforts and point towards the genuine possibility of new physics, with the possible...
Whether neutrinos are Majorana or Dirac in nature is an important open question in modern particle physics, which could provide insight on the matter-antimatter asymmetry in the universe. The observation of Neutrinoless Double Beta Decay (0νββ), a hypothesized Beyond Standard Model decay, would conclusively establish the Majorana nature of neutrinos and demonstrate lepton number violation. The...
SNO+ is a multi-purpose, low-background neutrino detector located at SNOLAB, Canada. Currently filled with liquid scintillator, its physics programme includes measurements of solar, reactor, geo-, and potential supernova neutrinos. Preparations are underway to load natural tellurium into the scintillator to enable a search for neutrinoless double beta decay (0νββ) in tellurium-130. This talk...
