We explore the potential to prove light extra gauge $Z^\prime$ boson inducing non-standard neutrino interactions (NSIs) in coherent-elastic neutrino-nucleus scattering (CE$ \nu $NS) experiments. intend examine how latest COHERENT-CsI and CENNS-10 data can constrain this model. A detailed investigation for upcoming Ge, LAr-1t, NaI detectors of COHERENT collaboration has also been made. Depending on numerous other constraints coming from oscillation experiments, muon $ (g-2) $, beam-dump LHCb,...

At present the three major unknowns in neutrino oscillation parameters are mass hierarchy, octant of $\theta_{23}$ and CP phase $\delta_{CP}$. It is well known that presence hierarchy$-\delta_{CP}$ degeneracies affects unambiguous determination these parameters. In this paper we show a comprehensive way to study remaining parameter form generalized hierarchy-$\theta_{23}$ - $\delta_{CP}$ degeneracy. We wrong-hierarchy and/or wrong-octant solutions can be further classified into eight...

We study the effect of nonstandard interactions (NSIs) on propagation neutrinos through Earth's matter and how it affects hierarchy sensitivity DUNE experiment. emphasize special case when diagonal NSI parameter ${\ensuremath{\epsilon}}_{ee}=\ensuremath{-}1$, nullifying standard effect. show that if, in addition, $CP$ violation is maximal then this gives rise to an exact intrinsic degeneracy appearance channel, irrespective baseline energy. Introduction off parameter,...

We examine the potential to probe generalized neutrino interactions (GNIs), exotic effective couplings due new physics beyond Standard Model, in coherent-elastic neutrino-nucleus scattering experiments light of latest COHERENT-CsI and -LAr data. Our analysis focuses on scalar-, vector-, tensor-flavored GNI parameters. A combined has been made constrain these for CsI LAr detector. further add projected forthcoming reactor-based scintillating bubble chamber detector couplings. It observed that...

We propose a KSVZ-type axion framework in which vector-like quarks (VLQ) and colored scalars generate Dirac neutrino masses radiatively. The global Peccei-Quinn symmetry (under the exotic fermions are charged) addresses strong CP problem ensures nature of neutrinos. also accounts for observed cosmological dark matter. systematically explore all viable VLQ representations. Depending on specific scenario, predicts distinct axion-to-photon couplings, testable through haloscope helioscope...

Motivated by the recent Belle II result indicating a <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mn>2.7</a:mn><a:mi>σ</a:mi></a:math> excess of <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msup><c:mi>B</c:mi><c:mo>+</c:mo></c:msup><c:mo stretchy="false">→</c:mo><c:msup><c:mi>K</c:mi><c:mo>+</c:mo></c:msup><c:mo>+</c:mo><c:msub><c:mi>E</c:mi><c:mrow><c:mi>miss</c:mi></c:mrow></c:msub></c:math> events compared to Standard Model (SM)...

One of the primary objectives Deep Underground Neutrino Experiment (DUNE) is to discover leptonic CP violation and identify it's source. In this context, we study impact non-standard neutrino interactions (NSIs) on observing signal at DUNE. We explore various parameter degeneracies introduced by non-zero NSI which these can influence sensitivity precision DUNE, considering both in data theory. particular, how DUNE affected because intrinsic hierarchy degeneracy occurs when diagonal...

The octant of $\theta_{23}$ and $\delta_{CP}$ are the two major unknowns in neutrino oscillation physics. precise determination is interlinked through octant-$\delta_{CP}$ degeneracy. In this paper we study proficiency DUNE experiment to determine these parameters, particular, role played by antineutrinos, broadband nature beam matter effect. For $P_{\mu e}$ $P_{\bar{\mu} \bar{e}}$ degeneracy occurs at different values $\delta_{CP}$, combination antineutrino runs help resolve this. However,...

We embed $\mu-\tau$ reflection symmetry into the minimal seesaw formalism, where two right-handed neutrinos are added to Standard Model of particle physics. Assuming that both left- and neutrino fields transform under symmetry, we obtain required forms Dirac mass matrix Majorana for neutrinos. To investigate phenomenology at low energies, first consider breaking due renormalization group running, then systematically study various schemes by introducing explicit terms high energies.

Abstract We explore the neutrinoless double beta (0 νββ ) decay induced by an ultralight dark matter field coupled to neutrinos. The effect on 0 is significant if coupling violates lepton number, for which ΔL = 2 transition directly driven without further suppression of small neutrino masses. As can be well described a classical field, features periodic modulation pattern in events. However, we find that early Universe such will very likely alter standard cosmological results. In particular,...

In the traditional neutrinophilic two-Higgs doublet model ($\ensuremath{\nu}2\mathrm{HDM}$), there is no nonstandard neutrino interaction (NSI) as interactions between Standard Model fermions with neutrinos are negligibly small due to tiny mixing of two scalar doublets. this work, we propose that if $\ensuremath{\nu}2\mathrm{HDM}$ modified by considering right-handed electron, ${e}_{R}$ negatively charged under a global $U(1)$ symmetry; then, one can generate significant amount NSI along...

We explore the possibility of having a fermionic dark matter candidate within $U(1)'$ models for CE$\nu$NS experiments in light latest COHERENT data and current future direct detection experiments. A vector-like has been introduced which is charged under symmetry, naturally stable after spontaneous symmetry breaking. perform complementary investigation using searches to as well $Z^{\prime}$ boson parameter space. Depending on numerous other constraints arising from beam dump, LHCb, BABAR,...

We investigate the 5.49 MeV solar axions flux produced in $p(d,\, ^{3}{\rm He})a$ reaction and analyze potential to detect it with forthcoming large underground neutrino oscillation experiment Jiangmen Underground Neutrino Observatory (JUNO). The JUNO detector could reveal through various processes such as Compton inverse Primakoff conversion, well their decay into two photons or electron-positron pairs inside detector. perform a detailed numerical analysis order forecast sensitivity on...

A bstract Solar nuclear reactions can occasionally produce sub-MeV elusive beyond the Standard Model particles that escape solar interior without further interactions. This study focuses on massive spin-one particles. We construct general theoretical framework and identify two crucial mixing sources involving photon, which facilitate communication between hidden visible sectors: kinetic with plasma-induced due to thermal electron loops. For both cases, we focus second stage of proton-proton...

Abstract Unanswered questions surrounding neutrinos have motivated investigations into physics beyond the standard model (SM) of particle physics. In particular, generalized neutrino interactions (GNI) provide a broader framework for studying these effects compared to commonly studied non-standard interactions. These are described by higher dimensional operators while maintaining gauge symmetries SM. Furthermore, cosmic background, predicted component SM and cosmology, has yet be directly...

A bstract We introduce a framework for hybrid neutrino mass generation, wherein scotogenic dark sector particles, including matter, are charged non-trivially under the 4 flavor symmetry. The spontaneous breaking of group to residual $$ {\mathcal{Z}}_2 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msub> <mml:mi>Z</mml:mi> <mml:mn>2</mml:mn> </mml:msub> </mml:math> subgroup results in “cutting” radiative loop. As consequence neutrinos acquire through “scoto-seesaw” mechanism,...

We study the zero textures of Yukawa matrices in minimal extended type-I seesaw (MES) model which can give rise to ∼ eV scale sterile neutrinos. In this model, three right handed neutrinos and one extra singlet S are added generate a light neutrino. The neutrino mass matrix for active neutrinos, m ν , depends on Dirac (M D ), Majorana R ) coupling singlet. predicts masses vanish. systematically investigate M observe that maximum five zeros lead viable . For we consider four different forms...

We discuss the consequences of assuming that (Majorana) neutrino mass matrix ${M}_{\ensuremath{\nu}}$ and charged lepton ${M}_{l}$ satisfy ${S}_{\ensuremath{\nu}}^{T}{M}_{\ensuremath{\nu}}{S}_{\ensuremath{\nu}}=\ensuremath{-}{M}_{\ensuremath{\nu}}$ ${T}_{l}^{\ifmmode\dagger\else\textdagger\fi{}}{M}_{l}{M}_{l}^{\ifmmode\dagger\else\textdagger\fi{}}{T}_{l}={M}_{l}{M}_{l}^{\ifmmode\dagger\else\textdagger\fi{}}$ with respect to some discrete groups ${S}_{\ensuremath{\nu}}$ ${T}_{l}$ contained in...

We examine the capabilities of DUNE experiment in probing leptonic $CP$ violation within framework theories with generalized symmetries characterized by texture zeros corresponding transformation matrices. investigate DUNE's potential to probe two least known oscillation parameters, atmospheric mixing angle ${\ensuremath{\theta}}_{23}$ and Dirac phase ${\ensuremath{\delta}}_{CP}$. fix theory-motivated benchmarks for (${\mathrm{sin}}^{2}{\ensuremath{\theta}}_{23}$,...

The axion-like particles (ALPs) are very good candidates of the cosmological dark matter, which can exist in many extensions standard model (SM). mass range ALPs as matter extend from a sub-eV scale to almost $10^{-22}~{\rm eV}$. On other hand, neutrinos found be massive and SM must extended explain neutrino masses. It becomes interesting consider an exclusive coupling between these two low frontiers that both beyond SM. propagation inside Milky Way would undergo coherent forward scattering...

We revisit the phenomenology of neutrinoless double beta ($0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$) decay mediated by noninterfering exchange light and heavy Majorana neutrinos, in context current prospective ton-scale experimental searches, as well recent calculations nuclear matrix elements (NME) different models. derive joint upper bounds on contributions to $0\ensuremath{\nu}\ensuremath{\beta}\ensuremath{\beta}$ decay, for sets NME, through separate combined data coming...

We consider minimal type-I seesaw framework to realize $ \mu-\tau reflection symmetry in the low-energy neutrino mass matrix, M_{\nu} $. Considering DUNE experiment, we scrutinize its potential measure precision of 2-3 mixing angle, \theta_{23} and Dirac CP-phase, \delta for given symmetry. Later, examine these two parameters considering NuFit-3.2 data as one important true points. To study phenomenology, further discuss various breaking patterns such an exact Moreover, each scenario perform...

We study origin, consequences and testability of a hypothesis `partial $\mu$-$\tau$' reflection symmetry. This symmetry predicts $ |U_{\mu i}|=|U_{\tau i}|~(i=1,2,3) for single column the leptonic mixing matrix $U$. Depending on whether this holds first or second $U$ different correlations between $\theta_{23}$ \delta_{CP} can be obtained. obtained using discrete flavour symmetries. In particular, all subgroups SU(3) with 3-dimensional irreducible representation which are classified as class...

We examine the implications of a recently proposed theory fermion masses and mixings in which an ${A}_{4}$ family symmetry emerges from orbifold compactification. analyze two variant schemes concerning their predictions for neutrino oscillations, neutrinoless double-beta decay, golden quark-lepton unification mass relation. find that upcoming experiments DUNE as well LEGEND nEXO offer good chances exploring substantial region parameters.

We present a detailed analysis and phenomenological consequences of neutrino mass matrix, [Formula: see text], with one-zero texture in the flavor basis where active sector is extended by one sterile (3[Formula: text]+[Formula: text]1 case). In particular, our aim to explore behavior mixing parameters detail when elements matrix goes zero. To study this, we consider two distinct spectrum neutrinos: (i) completely hierarchical vanishing (ii) quasidegenerate spectrum. 3[Formula: scenario, low...