Conveners
Nu: Neutrino Masses and Neutrino Mixing
- Pedro Machado (Fermilab)
- Bryan Ramson (Fermilab)
Nu: Neutrino Masses and Neutrino Mixing
- Pedro Machado (Fermilab)
- Bryan Ramson (Fermilab)
Nu: Neutrino Masses and Neutrino Mixing
- Bryan Ramson (Fermilab)
- Pedro Machado (Fermilab)
Nu: Neutrino Masses and Neutrino Mixing
- Bryan Ramson (Fermilab)
- Pedro Machado (Fermilab)
Nu: Neutrino Masses and Neutrino Mixing
- Bryan Ramson (Fermilab)
- Pedro Machado (Fermilab)
Description
Neutrino Masses and Neutrino Mixing
Super-Kamiokande (SK) is a 50 kiloton water-Cherenkov detector located in Japan which has collected over 20 years of atmospheric neutrino data. This talk will present the latest results from the SK atmospheric neutrino oscillation analysis, including events from an expanded fiducial volume and new data taken following major detector refurbishment work in 2018, which together result in a 30%...
Precision measurements from long-baseline neutrino experiments are revealing details about neutrino interactions, masses, and mixing properties. The NOvA experiment employs a 14-kiloton liquid scintillator detector to collect neutrinos after an 800-kilometer journey from Fermilab to northern Minnesota. With a growing collection of neutrino events, NOvA is extending its reach into the...
Daya Bay is an international neutrino reactor experiment in southern China. Eight identical gadolinium-doped liquid scintillator detectors located in three experimental halls at different distances from 360 m to 1900 m from the nuclear power plant reactors have collected a unique sample of more than 5.5 million electron-antineutrino interactions between 2011 and 2020. The high-precision...
In the past decade, experimental neutrino physics has evolved to be one of the most exciting and rapidly growing fields of scientific research. In particular, the discovery of neutrino oscillations is a significant step towards understanding whether neutrinos violate the CP-symmetry. Deep Underground Neutrino Experiment (DUNE) and Hyper-Kamiokande are two long-baseline neutrino experiments...
Future cosmological observatories, such as CMB-S4, the Thirty Meter Telescope, and the Vera Rubin Observatory, will give the highest precision data on the universe ever measured. The convolution of this data may allow theorists to posit new Beyond Standard Model (BSM) physics in operation during earlier phases of the universe. In the work presented here, we focus on the transition of...
Tens of MeV neutrinos, e.g. from the stopped pion or core-collapse supernova sources, scatter off the target nucleus in the detector either via a coherent elastic or the inelastic process and allow the study of a variety of SM and BSM processes. The precision of the coherent elastic neutrino nucleus scattering (CEvNS) process, where the scattered nucleus remains in its ground state, is limited...
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to make a precision mass measurement of the neutrino by leveraging the kinematics of tritium beta decay. High-precision spectroscopy is performed near the endpoint at 18.6 keV by employing a windowless gaseous tritium source combined with a MAC-E filter technique as an electron spectrometer. Being complementary to the search for...
The MAJORANA DEMONSTRATOR experiment searches for neutrinoless double-beta decay (0νββ) in 76Ge using p-type point contact (PPC) high purity germanium (HPGe) detectors. The data-taking for 0νββ by the DEMONSTRATOR has successfully completed in March 2021. The DEMONSTRATOR has developed traditional pulse-shape-based approaches to discriminate different types of events, such as multi-site (MS)...
The LEGEND (Large Enriched Germanium Experiment for Neutrinoless Double-beta decay) project will search for neutrinoless double-beta decay in $^{76}$Ge, aiming to operate at the ton-scale in its second phase (LEGEND-1000). LEGEND uses liquid argon as an active veto and as a radiopure bulk shield. Penetrating cosmic ray muons can cause showers in liquid argon, generating free neutrons which can...
Project 8 is an experiment that seeks to determine the electron-weighted neutrino mass via the precise measurement of the electron energy in beta decays, with a sensitivity goal of $40\,\mathrm{meV/c}^2$. We have developed a technique called Cyclotron Radiation Emission Spectroscopy (CRES), which allows single electron detection and characterization through the measurement of cyclotron...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay ($0\nu\beta\beta$) decay that has reached the one-tonne mass scale. The detector, located at the Gran Sasso National Laboratory in Italy, consists of an array of 988 TeO$_2$ crystals arranged in a compact cylindrical structure of 19 towers. CUORE began...
In this talk, I will describe neutrino interactions over a wide energy range and overview experimentally observed reactions. I will discuss theoretical approaches for the evaluation of scattering cross sections for different neutrino-induced processes at various energy scales. The energy range and precision of modern and future neutrino experiments and observations require us to account for...
NOvA is a long-baseline neutrino experiment at Fermilab that studies neutrino oscillations via electron neutrino appearance and muon neutrino disappearance. The oscillation measurements compare the Far Detector data to an oscillated prediction which combines Near Detector (ND) data and the current understanding of neutrino interactions through simulation using GENIE. By adjusting the cross...
Neutrino-nucleus cross sections are an important facet of interpreting results in accelerator neutrino experiments. However, these cross sections are still not theoretically well understood. I will discuss how near detector tunes, widely adopted in accelerator neutrino experiments to address cross section uncertainties, affect new physics searches. I will present two illustrative new physics...
Sensitivities of future large underground neutrino oscillation experiments are critically dependent upon precisely understanding the initial energy of an incoming neutrino via cross section models and event generator predictions which summarize prospective final states. Extracting the true initial energy of the neutrino is thus model dependent, requiring a deep understanding of the biases...
Standard Model predictions of neutrino-nucleus scattering cross sections for neutrino energies around 1 GeV or more are needed to precisely extract neutrino oscillation parameters from future neutrino oscillation experiments such as DUNE and Hyper-Kamiokande. However, theoretical predictions are challenging due to non-perturbative physics arising from low-energy QCD interactions in nuclear...
Complete Monte Carlo simulation of a neutrino experiment typically involves the lengthy and CPU-intensive process of integrating models of incoming neutrino fluxes, event generation, as well as detector setup, of which accounting for the detector response in an essential component.
We provide an alternative, fast, geometry-independent system for modeling the energy smearing and angular...
The discovery of neutrino oscillations has motivated the extension of the Standard Model and various neutrino experiments including beam-based neutrino facilities are expected to measure the related parameters more precisely, deepening our understanding of the nature of neutrinos. Beyond the neutrino-sector physics, such neutrino facilities are receiving increasing attention as they can test...
The BeEST (Beryllium Electron capture in Superconducting Tunnel junctions) experiment searches for physics beyond the standard model (BSM) in the neutrino sector through momentum conservation in electron capture decay (EC) of Be-7 [1]. Be-7 atoms are directly implanted into Ta-based superconducting tunnel junction (STJ) sensors that can measure the energy of the recoiling Li-7 daughters with a...
The MicroBooNE collaboration recently released a series of measurements aimed at investigating the nature of the excess of low-energy electromagnetic shower events observed by the MiniBooNE collaboration. In this talk, we will present the latest results from both a search of single photons in MicroBooNE, as well as a series of three independent analyses leveraging different reconstruction...
This talk will cover some recent progress on simulating and constraining MeV-scale heavy neutral leptons at neutrino experiments. I will introduce DarkNews, a fast simulation tool for generating dilepton and single photon events in accelerator neutrino experiments, and present new limits derived from the T2K near detector using a novel method to sample multi-dimensional parameter spaces.
Nuclear reactors are one of the major sources that have been used to study neutrinos. Reines and Cowan first detected neutrinos from Savannah River P Reactor. Later the KamLAND experiment observed neutrino oscillation and measured the oscillation parameter $\Delta m_{12} ^2$. The Daya Bay experiment precisely measured the mixing angle $\theta_{13}$ which was verified independently by Reno and...
In this talk I will present the recent results on inclusive and exclusive electron scattering cross section measurements on Ar at Jefferson Lab Hall A. I will describe how this experiment will inform the future neutrino oscillation experiment like DUNE and I will describe how the electron scattering data can be used to determine accurate nuclear model that describes neutrino-nucleus...
Neutrinos can escape dense environments, otherwise opaque to photons, and travel cosmic distances unscathed by background radiation or magnetic fields. They are ideal cosmic messengers and present a unique insight into the most energetic and enigmatic environments in the Universe. With the IceCube’s discovery of the high-energy cosmic neutrino flux, we have embarked upon a new era of...
When the neutrinos are at high densities, the neutrino-neutrino coherent forward scattering may lead to collective flavor oscillations. The evolution of these oscillations becomes a time-dependent quantum many-body problem. The computational complexities due to the exponential increase in the Hilbert space with the increase in the number of particles put limitations on how many neutrinos we...
Neutrinos in core-collapse supernovae are the main carriers of energy and lepton number, and therefore play an important role in the explosion mechanism as well as in the synthesis of nuclides in these environments. In the aftermath of a supernova explosion, neutrino-induced heating drives outflows of baryonic matter from the surface of the nascent neutron star. The physical characteristics of...
Neutrino-induced coherent pion production is a significant background for
electron neutrino appearance and muon neutrino disappearance in neutrino
oscillation experiments. MINERvA has measured the cross sections of the charged
current channel simultaneously in hydrocarbon (CH), graphite (C), iron (Fe) and
lead (Pb), which exceed the model predictions at multi-GeV $\nu_{\mu}$ energies
and...
The observation of neutrinoless double beta decay in the next generation of experiments would reveal that lepton number is violated and that neutrinos are Majorana particles. Such a discovery will have far reaching implications, shedding light on the mechanism of neutrino mass generation, and giving insight on leptogenesis scenarios for the generation of the matter-antimatter asymmetry in the...
Neutrino cross sections are a crucial input for any experiment that aims to measure neutrino properties. In this talk I will overview recent progress in the theory of neutrino interaction cross sections relevant for ongoing and upcoming experiments within the neutrino program.
