Present status of the major problems in neutrino physics is outlined. New approaches to their solutions, recent advances and developments will be reviewed. Landscape of the problems covers complete reconstruction of the neutrino mass and mixing spectrum, tests of nature of neutrino masses, searches for new physics beyond the SnuM, identification of the mechanism of neutrino mass and mixing...
T2K is a long-baseline neutrino oscillation experiment taking data since
2010. A neutrino beam is produced at the J-PARC accelerator in Japan and is
sampled at a Near Detector complex 280 m from the
neutrino production point and at the far detector, Super-Kamiokande.
Beams predominantly composed of muon neutrinos or muon anti-neutrinos have been
produced by changing the currents in the...
The NuMI Off-axis νe Appearance (NOvA) experiment is a two-detector, long-baseline neutrino oscillation experiment which addresses some of the main open questions in the neutrino sector through precision measurements of neutrino and antineutrino oscillations. NOvA uses the upgraded NuMI neutrino beam at the Fermi National Accelerator Laboratory and a highly active, finely segmented 14-kton far...
The OPERA experiment reached its main goal by proving the appearance of $\nu_\tau$ in the CNGS $\nu_\mu$ beam. A total sample of 5 candidates fulfilling the analysis defined in the proposal was detected with a S/B ratio of about ten allowing to reject the null hypothesis at 5.1 $\sigma$. The search has been extended to $\nu_\tau$-like interactions failing the kinematical analysis defined in...
The Daya Bay Reactor Neutrino Experiment consists of eight antineutrino detectors placed at different baselines from six 2.9 $\mathrm{GW_{th}}$ nuclear reactors. In this talk, I will present the evolution of the reactor antinetrino flux and spectrum with a 2.2 million inverse beta decay (IBD) sample collected from the Daya Bay’s near detectors over multiple fuel cycles in 1230 days. In...
The Reactor Experiment for Neutrino Oscillation (RENO) started data-taking from August, 2011 and has sucdessfully measured the smallest neutrino mixing angle θ_13 in 2012 using 220 days of data by observing the disappearance of reactor antineutrinos. Antineutrinos from the six reactors at Hanbit Nuclear Power Plant in Korea are detected and compared by the two identical detectors located in...
Nuclear reactor neutrinos were used on the first neutrino detection back in 1956. Since then our knowledge on neutrino physics haven't stopped broadening, and reactor neutrinos are still an important source of investigation. The Double Chooz (DC) is an experiment on neutrino oscillation based at Chooz nuclear power plant in France. Back in 2011 the DC collaboration reported an indication of...
The Borexino experiment is running at the “Laboratorio del Gran Sasso” in Italy since 2007. Its technical distinctive feature is the unprecedented ultralow background of the inner scintillating core, which is the basis of the outstanding achievements accumulated by the experiment.
In this talk, after recalling the main features of the detector, the impressive solar data gathered so far by...
Nuclear astrophysics is an extremely rich field, correlated with many other research fields like observational neutrino physics, stellar modeling and cosmology.
As example, the precise knowledge of reactions producing neutrinos is mandatory to use neutrinos as probes of the stellar interior but at stellar energies the cross sections are usually extremely low, down to the femto-barn level.
The...
The present status of neutrino cross section physics is reviewed fo-
cusing on the recent theoretical developments in quasielastic scattering,
multi-nucleon contributions to the inclusive scattering and pion produc-
tion on nucleons and nuclei. A good understanding of these processes is
crucial to meet the precision needs of neutrino oscillation experiments.
Some of the challenges that arise...
Precision measurements of neutrino oscillation probabilities require an improved understanding of neutrino-nucleus interactions. MINERvA is a neutrino scattering experiment at Fermilab that utilizes the intense neutrino beam from the NuMI beam-line and a finely segmented scintillator based tracking detector to measure neutrino cross sections on various nuclear targets. MINERvA has published...
The T2K long-baseline neutrino experiment has new neutrino cross-section measurements. In addition to being interesting in their own right, measuring neutrino cross sections is vital as they correspond to a major systematic uncertainty for neutrino oscillation analyses. In particular, the new results focus on exploiting the water targets
in the T2K off-axis near detector, ND280, updating our...
MicroBooNE is a liquid-argon-based neutrino experiment, which is collecting data in the Fermilab Booster Neutrino Beam. MicroBooNE will directly probe the source of the anomalous excess of electron-like events in MiniBooNE, while also measuring low-energy neutrino cross sections and providing important R&D for future detectors. It is the first of three liquid argon TPC detectors planned for...
A global analysis of neutrino masses and mixings, performed within the standard three-neutrino framework, is presented. The combination of current data coming from oscillation experiments, neutrinoless double beta decay searches, and cosmological surveys, provides interesting constraints on the known mass-mixing parameters, as well as intriguing hints on the unknown ones. Concerning the...
The Deep Underground Neutrino Experiment (DUNE) is a long-baseline neutrino oscillation experiment with primary physics goals of determining the neutrino mass hierarchy and measuring delta_CP with sufficient sensitivity to discover CP violation in neutrino oscillation. CP violation sensitivity in DUNE requires careful understanding of systematic uncertainty, with contributions expected from...
Hyper-Kamiokande is a planned next-generation multi-purpose megaton-scale water Cherenkov detector in Japan. It is situated along the same J-PARC beam line as T2K. The detector, which is heavily influenced by its successful predecessor Super-Kamiokande, will consists of two cylindrical tanks filled with 260 ktons of ultrapure water, a volume approximately 10 times larger than Super-Kamiokande....
The Japan based long baseline neutrino program aims for the discovery of CP violation in neutrino mixing and precision measurements of neutrino oscillation parameters at the T2K and Hyper-K experiments. Achieving these goals will require the collection of large data sets and the reduction of systematic uncertainties to the few percent level. Dominant systematic errors arise in the modeling...
The nuSTORM facility will provide \nu_e and \nu_\mu beams from the
decay of low energy muons confined within a storage ring. The
instrumentation of the ring, combined with the excellent knowledge of
muon decay, will make it possible to determine the neutrino flux at
the %-level or better. The neutrino and anti-neutrino event rates are
such that the nuSTORM facility serving a suite of near...
After measuring in 2012 a relatively large value of the neutrino mixing angle θ13, the door is now open to observe for the first time a possible CP violation in the leptonic sector. The measured value of θ13 also privileges the 2nd oscillation maximum for the discovery of CP violation instead of the usually used 1st oscillation maximum. The sensitivity at this 2nd oscillation maximum is about...
The precision era of neutrino physics requires measurements of absolute neutrino cross sections at the GeV scale with exquisite (1%) precision. These measurements are presently limited by the uncertainties on neutrino flux: the goal of the ERC ENUBET Project is to demonstrate that such uncertainties can be removed employing novel monitoring techniques of the leptons at the neutrino source. In...
The Super-Kamiokande (SK) Collaboration has committed to the the SuperK-Gadolinium project that, by dissolving a Gd salt at 0.2 % in mass in the SK water, will upgrade the detector to be able to identify neutrons with very high efficiency. The current expected time
for refurbishment of SK and start of this new phase is 2018.
In this talk we present the physics benefits of high efficiency...
The 40kt DUNE Far Detector, located at the Sanford Underground Research Facility, will offer unique capabilities for the study of atmospheric neutrinos. Due to the detector’s excellent energy resolutions, angular resolutions, and particle ID capabilities, atmospheric neutrino analyses in DUNE can provide valuable information about 3-flavor oscillations, despite the relatively modest...
Hyper-Kamiokande is a next generation water Cherekov detector consisting of 2 tanks,each with 187 kton fiducial mass, to be built in a staged approach.
Hyper-Kamiokande will detect neutrinos produced by the upgraded J-PARC accelerator complex, as well as atmospheric neutrinos.
It will make precision measurements of neutrino mixing parameters by a combination of accelerator and atmospheric...
The KM3NeT collaboration is constructing megaton-scale neutrino detectors at a depth of 2500m in the Mediterranean Sea.
These detectors, named ARCA and ORCA are each made up of a three-dimensional array of spherical optical modules, each of which contains 31 3" photomultiplier tubes, designed to detect Cherenkov light emitted by charged leptons produced by neutrino interactions in and around...
Precise measurements of the $\theta_{13}$ neutrino oscillation parameter by the Daya Bay, RENO and Double Chooz experiments have opened the path to the determination of the neutrino mass hierarchy. Indeed whether the $\nu_3$ neutrino mass eigenstate is heavier or lighter than the $\nu_1$ and $\nu_2$ mass eigenstates is one of the remaining undetermined fundamental aspects of the Standard Model...
Accelerator Driven System (ADS) subcritical reactors are being developed around the world. The main goals of this kind of facility are to produce energy and, at the same time, to dispose of nuclear waste, which will be used to power nuclear reactors. Since, by itself, used nuclear fuel is not able to sustain a chain reaction, the additional neutrons needed will be supplied by a high-intensity...
I review the experimental indications in favor of short-baseline
neutrino oscillations. I discuss their interpretation in the framework
of 3+1 neutrino mixing with a sterile neutrino at the eV scale. I
present the results of the updated 3+1 global fit including the recent
MINOS, IceCube and NEOS data. I discuss the implications for future
neutrino oscillations and neutrinoless double-beta...
The SoLid experiment intends to search for active-to-sterile anti-neutrino oscillation at very short baseline and perform a precise measurement of the 235U anti-𝜈e spectrum at SCK•CEN BR2 in Belgium. A way to test this hypothesis is to look for distortions of the anti-neutrino energy caused by oscillation from active to sterile neutrino at several close stand-off distances ( ∼ 6-9m) from a...
In the recent years, major milestones in neutrino physics were accomplished at nuclear reactors: the smallest neutrino mixing angle $\theta_{13}$ was determined with high precision and the emitted antineutrino spectrum was measured at unprecedented resolution. However, two anomalies, the first one related to the absolute flux and the second one to the spectral shape, have yet to be solved. The...
DANSS (JINR, Dubna and ITEP, Moscow) is a one cubic meter highly segmented solid scintillator detector.
It consists of 2500 scintillator strips (100x4x1 cm3), covered with
gadolinium loaded reflective coating and read out by SiPMs via wave length shifting fibers. Groups of 50 strips are also read out by conventional PMTs. DANSS is placed under a 3 GW reactor at the Kalinin NPP (Russia) on a...
PROSPECT is a reactor antineutrino experiment consisting of a segmented 6Li-loaded liquid scintillator antineutrino detector designed to probe short-baseline neutrino oscillations and precisely measure the reactor antineutrino spectrum. The experiment will be located at the High Flux Isotope Reactor (HFIR) at Oak Ridge National Lab. The three ton detector will be located 7-12 m from the...
The SOX project aims at searching eV scale sterile neutrinos by means of a powerful anti-neutrino source located very close to the Borexino detector at the Gran Sasso Laboratory in Italy
The source will be made with a sample of Ce-144 completely shielded by a thick tungsten container and will be located at 8.25 m from the center of the Borexino detector. The total activity will be around 150...
The JSNS2 experiment aims to search for the existence of neutrino
oscillations with Delta m2 near 1eV2 at the J-PARC Materials
and Life Science Experimental Facility (MLF). With the 1 MW of 3 GeV
proton beam created by Rapid Cycling Synchrotron (RCS) and spallation
neutron target, an intense neutrino beam from muon decay at rest is
available....
Three-flavour neutrino oscillations have proved very successful in describing the observed neutrino oscillation data. However, there are also some anomalies, including the excesses of appeared electron neutrino interactions in LSND and MiniBooNE, and a sterile neutrino state at a larger mass-splitting scale can provide an explanation for these results.
The MINOS/MINOS+ experiment was a...
The Fermilab Short-Baseline Neutrino (SBN) program, with three liquid argon time projection chamber (LAr-TPC) detectors located along the Booster Neutrino Beam, presents a rich physics and R&D opportunity. SBN will perform sensitive searches for neutrino oscillations in both appearance and disappearance channels at the 1 eV^2 mass- splitting scale, thereby testing the sterile neutrino...
SBND (Short-Baseline Near Detector) is a 112 ton liquid argon TPC neutrino
detector under construction on the Fermilab Booster Neutrino Beam.
Together with MicroBooNE and ICARUS-T600, SBND will search for shortbaseline neutrino oscillations in the 1 $eV^2$ mass range. SBND will also perform
detailed studies of the physics of neutrino-argon interactions, thanks to a data
sample of millions of...
One of the hottest topics in present-day neutrino physics is provided by the hints of sterile species coming from the short-baseline (SBL) anomalies.
Waiting for a definitive (dis-)confirmation of these indications by future
SBL experiments, other complementary avenues can be explored in the
hunt of such elusive particles. An important opportunity is that offered by the
long-baseline (LBL)...
The 760 ton liquid argon ICARUS T600 detector performed a successful three-year physics run at the underground LNGS laboratories, studying neutrino oscillations with the CNGS neutrino beam from CERN, and searching for atmospheric neutrino interactions in cosmic rays. A sensitive search for LSND like anomalous nu_e appearance was performed, contributing to constrain the allowed parameters to a...
The Daya Bay Reactor Neutrino Experiment currently holds for the most precise measurement of the third neutrino mixing angle θ13~8.4^o, which unlocked the gateway of studying the CP violation in the lepton sector, and the most precise measurement of |Δm^2_32|. The multiple detectors at different locations also allow for using relative energy spectral analysis to search for a light sterile...
Neutrinos deeply affect cosmological observables, both in the early Universe and at low redshift. Thanks to these fingerprints, cosmology can constrain neutrino properties such as the absolute neutrino mass scale.
In this talk I will review the up to date cosmological constraints on neutrino physics; I will also show how future galaxy surveys can potentially pin down the neutrino mass sum.
We perform a comparative analysis of constraints on sterile neutrinos from the Planck experiment and from current and future neutrino oscillation experiments (MINOS, IceCube, SBN). For the first time, we express the Planck constraints on Neff and msterileeff from the Cosmic Microwave Background in the parameter space used by oscillation experiments using both mass-squared differences and...
The goal of the KArlsruhe TRItium Neutrino experiment (KATRIN) is to investigate the neutrino mass with a sensitivity of $0.2\,\mathrm{eV/c^{2}}$ by a high-resolution and high-statistics measurement of the end-point region of the $^{3}$H $\beta$-spectrum. The $\beta$-electrons start in the windowless gaseous tritium source and go into a differential and a cryogenic pumping section....
The GERDA (GErmanium Detector Array) experiment, located at the Laboratori Nazionali del Gran Sasso, is searching for neutrinoless double beta ($0\nu\beta\beta$) decay of $^{76}Ge$. Since the end of 2015, in Phase II of the experiment, 35 kg of enriched high-purity germanium detectors are operated in liquid argon, that serves as cooling for the detectors as well as active shield against...
The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrinoless double beta decay that has been able to reach the 1-ton scale. The detector consists of an array of 988 TeO2 crystals arranged in a cylindrical compact structure of 19 towers. The construction of the experiment and, in particular, the installation of all towers in the...
NEXT (Neutrino Experiment with a Xenon TPC) aims to observe the neutrinoless double beta decay of Xe-136 in a high-pressure gas xenon Time Projection Chamber using electroluminescence to amplify the signal from ionization. The two main advantages of this technology are a high energy resolution and the possibility of reconstructing the electron tracks in events with energies close to the...
The SNO+ experiment has multiple physics goals among which the search for neutrinoless double-beta decay, the study of solar neutrinos, measurements of anti-neutrinos from nuclear reactors and the Earth's natural radioactivity, as well as the detection of Supernovae neutrinos. Located in the SNOLAB underground physics laboratory (Canada) it re-uses the SNO detector equipped with ~9300 PMTs and...
With their excellent energy resolution, efficiency, and intrinsic radio-purity, cryogenic calorimeters are primed for the search of neutrino-less double beta decay (0nDBD). The sensitivity of these devices could be further increased by discriminating the dominant alpha background from the expected beta like signal. The CUPID-0 collaboration aims at demonstrating that the measurement of the...
Neutrinoless double-beta decay can provide evidence of lepton number violating processes and its observation can give information on the nature and the absolute mass scale of neutrinos. The SuperNEMO demonstrator searches for such decay through a tracking calorimeter technique which allows to disentangle different mechanisms for neutrinoless double beta decay with powerful background rejection...
The MiniBooNE experiment reported results from the analysis of $\nu_e$ and $\overline{\nu}_e$ appearance searches, which showed an excess of signal-like events at low reconstructed neutrino energies with respect to the expected background. A proposed explanation for this anomaly is based on the existence of a heavy ($\sim 50$ MeV) sterile neutrino. These $\nu_h$ would be produced by $\nu_\mu$...
The NA62 experiment at CERN collected a large sample of charged kaon decays in flight with a minimum bias trigger in 2007. Upper limits on the rate of the charged kaon decay into a muon and a heavy neutral lepton (HNL) obtained from this data are reported for a range of HNL masses.
SHIP is a new general purpose fixed target facility, whose Technical Proposal has been recently reviewed by the CERN SPS Committee and by the CERN Research Board. The two boards recommended that the experiment proceeds further to a Comprehensive Design phase in the context of the new CERN Working group "Physics Beyond Colliders", aiming at presenting a CERN strategy for the European Strategy...
Sterile neutrinos are among the most attractive extensions of the SM to generate the light neutrino masses observed in neutrino oscillation experiments.
When the sterile neutrinos are subject to a "lepton number"-like symmetry they can have masses around the electroweak scale and potentially large Yukawa couplings, which makes them testable at the planned Future Circular Colliders (FCC).
In...
We present a new computation of the Higgs effective vertex $H\ell_i\ell_j$ generated from heavy right handed neutrinos, within the Mass Insertion Approximation and to one-loop level. The simple analytical results found have interesting applications to phenomenology of Lepton Flavour Violation. In particular, we discuss some of these implications for Higgs mediated LFV processes.
The discovery of neutrino oscillations calls for an extension of the Standard Model that would generate neutrino masses and mixing. One of the simplest possibilities is the addition of fermionic gauge singlets or sterile neutrinos. TeV-scale realisations of this idea lead to a very rich phenomenology due to the mixing of the new fermions with the left-handed neutrinos of the SM and the large...
We discuss the matching of the minimal seesaw scenario up to dimension
seven onto the SMEFT at tree level, and at one loop to dimension four following the papers arXiv:1703.10924 and arXiv:1703.04415. The dramatic possibility that the minimal seesaw scenario can form a UV boundary condition that give the Higgs potential and electroweak scale at lower energies with PeV Majorana masses is discussed.
Sterile neutrinos may be part of a quasi-hidden sector that interacts with Standard Model particles via a heavy mediator. In the case where two (or more) sterile neutrinos have a flavor-changing coupling to a new boson which also couples to nucleons, the heavier state $N_2$ may decay into the lighter state $N_1$ and a pair of Standard Model particles. If the mass difference between the sterile...
In the context of non-supersymmetric SO(10) models, we analyze the renormalization group equations for the fermions observables (including neutrinos) from the GUT energy scale down to the electroweak energy scale, explicitly taking into account the effects of an intermediate energy scale induced by a Pati--Salam gauge group. We show that the evolved fermion masses and mixing present sizable...
I will talk about a totally new mechanism of leptogenesis. It requires only a time-varying Weinberg operator. The Weinberg operator is well-known for the motivation of generating light neutrino masses. It violates lepton number and can provide non-equilibrium dynamics in the early universe due to the suppression of tiny neutrino masses. A lot of underlying symmetries, e.g., B-L symmetry and...
A review of the theory and phenomenology of neutrino electromagnetic properties is presented. A short discussion on derivation of the general structure of the electromagnetic interactions of Dirac and Majorana neutrinos is presented. Then we review experimental constraints on neutrino magnetic and electric dipole moments, electric millicharge, charge radius and anapole moments from the...
