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constrained flavor violation (cfv) is a recent proposal for predicting the down-quark yukawa matrix in terms of those for up quarks and charged leptons. we study the viability of cfv with respect to its predictions for the lepton mass ratios, showing that this remains a challenge, and suggest some possible means for im... | completing constrained flavor violation: lepton masses, neutrinos, and leptogenesis |
motivated by recent results from neutrino experiments, we study the neutrino masses and mixing in the framework of a susy $su(5)\times \mathbb{a}_{4} $ model. the hybrid of type i and type ii seesaw mechanisms leads to the nonzero value of the reactor angle $\theta_{13}\neq 0$ and to the recently disfavored maximal atm... | hybrid seesaw neutrino model in susy $su(5)\\times \\mathbb{a}_{4}$ |
we present a model based on the $su(3)_{c}\otimes su(3)_{l}\otimes u(1)_{x}$ gauge symmetry having an extra $t_{7}\otimes z_{2}\otimes z_{3}\otimes z_{14} $ flavor group, which successfully describes the observed sm fermion mass and mixing pattern. in this framework, the light active neutrino masses arise via double se... | fermion mass and mixing pattern in a minimal t7 flavor 331 model |
using the residual symmetry approach, we propose a complex extension of the scaling ansatz on $m_\nu$ which allows a nonzero mass for each of the three light neutrinos as well as a nonvanishing $\theta_{13}$. leptonic dirac cp violation must be maximal while atmospheric neutrino mixing need not to be exactly maximal. e... | complex scaling in neutrino mass matrix |
we obtain a relationship between the hierarchies of mixing angles and of masses pertinent to the cabibbo-kobayashi-maskawa (ckm) quark mixing matrix and the pontecorvo-maki-nakagawa-sakata (pmns) lepton mixing matrix. using this relationship, we argue that the more severe hierarchy of the charge-2/3 quark masses requir... | anticorrelation of mass and mixing angle hierarchies |
recently, in ref. \cite{a4datta} datta et al. [arxiv:2106.06773] proposed an $a_4$ flavor symmetric model supplemented by $z_2\times z_3$ symmetry which can accommodate the appropriate lepton mixing and neutrino masses via type-i seesaw mechanism. they have constructed a minimal model with only one $su(2)_l$ doublet sc... | comment on "flavored leptogenesis and neutrino mass with $a_4$ symmetry" [jhep12(2021)051, arxiv:2106.06773] |
the neutrino mass hierarchy is one of the neutrino fundamental properties yet to be determined. we introduce a method to determine neutrino mass hierarchy by comparing the interaction rate of neutral current (nc) interactions, ν(bar nu) + p → ν(bar nu) + p, and inverse beta decays (ibd), bar nue + p → n + e+, of supern... | probing neutrino mass hierarchy by comparing the charged-current and neutral-current interaction rates of supernova neutrinos |
a method of diagonalization of a general neutrino mass matrix in an extended standard model with an a4 flavour symmetry is used. the method allows us to determine a relation between the mixing angles (θ12, θ23, θ13) and the cp-violation dirac phase (δcp). the current prediction of δcp is quite good, near the 1σ region ... | a prediction of δcp for a normal neutrino mass hierarchy in an extended standard model with an a4 flavour symmetry |
cosmology plays a fundamental role to determine the neutrino mass, therefore also to determine its mass hierarchy, since the massive neutrino contributes to the total matter density in the universe at the background and perturbation levels, once it becomes non-relativistic. after the non-relativistic transition the flu... | probing the neutrino mass through the cross correlation between the rees-sciama effect and weak lensing |
we point out that leptonic weak-basis invariants are an important tool for the study of the properties of lepton flavour models. in particular, we show that appropriately chosen invariants can give a clear indication of whether a particular lepton flavour model favours normal or inverted hierarchy for neutrino masses a... | leptonic invariants, neutrino mass-ordering and the octant of θ 23 |
atmospheric neutrino experiments can determine the neutrino mass hierarchy for any value of δcp . the iron calorimeter (ical) detector at the india-based neutrino observatory can distinguish between the charged current interactions of νμ and {\overline ν _π } by determining the charge of the produced muon. hence it is ... | improving the hierarchy sensitivity of ical using neural network |
we consider an extension of the standard model with the global symmetry-breaking pattern so (5 )/so (4 ) , where the higgs boson arises as a pseudo-nambu-goldstone boson. the scalar content of the theory consists of a standard-model-like higgs field and an extra real scalar field. the flavor sector of the model is exte... | neutrino mass generation and leptogenesis via pseudo-nambu-goldstone higgs portal |
the minos experiment, operating in the numi beam since 2005, has provided the most precise measurement of the atmospheric mass splitting |δm232|, and the recent combination of the vμ, ve, and atmospheric neutrino samples has provided some evidence of non-maximal mixing, and hints about the neutrino mass hierarchy and t... | results from minos and nova |
the dirac leptonic c p phase δc p is one of the crucial unknown parameters in neutrino oscillation physics. in this paper we explore the possibility of using low energy atmospheric neutrino events to probe δc p. we show that at sub-gev energies, when the events are binned as a function of the energy and direction of th... | hierarchy independent sensitivity to leptonic δc p with atmospheric neutrinos |
in the next decade several experiments will attempt to determine the neutrino mass hierarchy, i.e. the sign of $\delta m_{31}^2$. in the last years it was noticed that the two hierarchies are disjoint hypotheses and, for this reason, wilks' theorem cannot be applied: this means that $\delta\chi^2=\chi^2_{ih}-\chi^2_{nh... | statistical methods for the neutrino mass hierarchy |
we show that our universe lives in a topological and non-perturbative vacuum state full of a large amount of hidden quantum hairs, the hairons. we will discuss and elaborate on theoretical evidences that the quantum hairs are related to the gravitational topological winding number in vacuo. thus, hairons are originated... | holographic naturalness and topological phase transitions |
magnetism is a rich subject touching all aspects of physics. my goal with this dissertation is to explore spin and magnetic moments in relativistic mechanics from both a quantum and classical perspective. we emphasize the special case of gyromagnetic ratio g=2 and its relationship to the algebraic spin structure of wav... | modern topics in relativistic spin dynamics and magnetism |
we explore neutrino mass hierarchy determination and c p -phase measurement using the multimegaton water cherenkov detector km3net-oscillation research with cosmics in the abyss in the mediterranean sea receiving neutrino beam from the fermilab long baseline neutrino facility over a 6900 km baseline. we find that with ... | mass hierarchy and c p -phase sensitivity of orca using the fermilab neutrino beam |
it is shown that an idea proposed in 1996 that relates in a qualitatively correct way the interfamily mass hierarchies of the up quarks, down quarks, charged leptons, and neutrinos, can be combined with a predictive scheme recently proposed for relating quark mixing and neutrino mixing. in the resulting model, the enti... | model of quark and lepton mixing and mass hierarchy |
gauge mediation predicts 10 tev or heavier squarks because such a heavy stop is required to explain the observed 125 gev higgs boson mass without a large trilinear soft mass term in the minimal supersymmetric standard model. although such a high scale cannot be searched by the lhc directly, gauge mediation also predict... | light higgsino as the tail of the μ -bμ solution |
this paper aims at solving several open questions in current neutrino physics: the neutrino mass hierarchy, the dirac cp-violating phase, the absolute mass of neutrinos, the nature of neutrinos (dirac or majorana), the majorana matrix, and the absolute value of the effective majorana neutrino mass. in the research pres... | determining the neutrino mass eigenstates and the effective majorana mass |
one of the unresolved mysteries in neutrino physics is the neutrino mass hierarchy. we present a new method to determine neutrino mass hierarchy by comparing the events of inverse beta decays (ibd), {\bar{ν }}_e + p→ n + e^+, and neutral current (nc) interactions, ν ({\overline{ν }}) + p→ ν ({\overline{ν }}) + p, of su... | on possibility of determining neutrino mass hierarchy by the charged-current and neutral-current events of supernova neutrinos in scintillation detectors |
the formation of the quark and lepton mass matrices through intermediate states of heavy mirror fermions is able to reproduce basic observable qualitative properties of weak-mixing matrices—specifically, the cabibbo—kobayashi—maskawa (ckm) matrix and the pontecorvo—maki—nakagawa-sakata (pmns) matrix. the reproduction i... | cp properties of leptons within the mirror mechanism |
the jiangmen underground neutrino observatory (juno) is a multi-purpose neutrino experiment designed to measure the neutrino mass hierarchy using a central detector (cd), which contains 20 kton liquid scintillator (ls) surrounded by about 17000 photomultiplier tubes (pmts). due to the large fiducial volume and huge num... | fast muon simulation in the juno central detector |
most of what we concern in beyond standard phenomenology are the existence of tiny numbers. the well-defined principle for protecting the tiny number to be large from quantum correction is supersymmetry. however, such a nice framework is challenged by the non-observation of superpartners at lhc. instead, we propose a n... | consistent origin of neutrino mass and freeze-in dark matter in large n theories |
we consider the $l$-$r$ symmetric composite model for quarks and leptons where constituent preons possessing some local $su(n)_{mf}$ metaflavor symmetry are bound by the chiral $so(n)_{l}\times so(n)_{r}$ gauge metacolor forces. the strengthening of the 't hooft's anomaly matching condition, when the massless fermion c... | su(8) grand unification from composite quarks and leptons |
the lepton sector is studied within a flavored non-renormalizable model where the $\mathbf{s}_{3}\otimes \mathbf{z}_{2}$ flavor symmetry drives the yukawa couplings. in this framework, the effective neutrino mass, that comes from the type ii see-saw mechanism, as well as the charged lepton mass matrices are hierarchica... | a non-renormalizable neutrino mass model with $\\mathbf{s}_{3}\\otimes \\mathbf{z}_{2}$ symmetry |
this thesis address theoretical and phenomenological aspects of active and sterile mixing pattern within minimal extended seesaw frameworks. it consists of six chapters, where chapters one and six are dedicated to introduction and conclusion chapters, respectively. in chapter two, we study active-sterile phenomenology ... | theoretical and phenomenological consequences of active and sterile neutrino within beyond standard model framework |
in the quark sector, we experience a correlation between the mixing angles and the mass ratios. a partial realization of the similar tie-up in the neutrino sector helps to constrain the parametrization of masses and mixing, and hints for a predictive framework. we derive five hierarchy dependent textures of neutrino ma... | mixing angle as a function of neutrino mass ratio |
new generation of three reactor neutrino experiments have made definitive measurements of the smallest neutrino mixing angle theta13 in 2012, based on the disappearance of electron antineutrinos. more precise measurements of the mixing angle have been made as well as the squared mass difference between electron neutrin... | status and prospects of reactor neutrino experiments |
we give here an overview of recent developments in high energy physics and cosmology and their interconnections that relate to unification, and discuss prospects for the future. thus there are currently three empirical data that point to supersymmetry as an underlying symmetry of particle physics: the unification of ga... | high energy physics and cosmology at the unification frontier: opportunities and challenges in the coming years |
a brief review is given of some recent works where baryogenesis and dark matter have a common origin within the u(1) extensions of the standard model (sm) and of the minimal supersymmetric standard model (mssm). the models considered generate the desired baryon asymmetry and the dark matter to baryon ratio. in one mode... | baryogenesis and dark matter in u(1) extensions |
we have studied the scenario of baryogenesis via leptogenesis in an $a_4$ flavor symmetric framework considering type i seesaw as the origin of neutrino mass. because of the presence of the fifth generation right handed neutrino the model naturally generates non-zero reactor mixing angle. we have considered two vev ali... | normal hierarchy neutrino mass model revisited with leptogenesis |
instead of right-handed neutrino singlets, the standard model is extended to include lepton triplets (σ+ ,σ0 ,σ-). each quark and lepton family may now transform under an anomaly-free u(1)x gauge symmetry, known already for many years. a new sequential application is presented, using just the one higgs doublet of the s... | hierarchical quark and lepton masses with sequential u(1) gauge symmetry |
the pancharatnam - berry phase (pbp) of purely geometric origin appears as a reparametrization invariant quantity of ray space. in this article, we investigate the properties exhibited by pbp in neutrino mixing. we map the neutrino flavour modes to independent flavour vacuum states and compute pbp using bargmann invari... | pancharatnam-berry phase in neutrino mixing |
to explore the neutrino physics in the framework of finsler geometry, we perform constraints on five cosmological models using the most stringent constraint we can provide so far. for the first time, we give the 95% limits of the total mass of three active neutrinos σ mν for three finslerian models in the presence of m... | weighing neutrinos in finslerian cosmological models |
this paper explores the juno sensitivities to the neutrino mass hierarchy by use of the atmospheric neutrinos. here we conservatively use the atmospheric νµ and {\displaystyle \bar{ν }}μcharged current events with the muon track length lµ > 5 m for the physical analysis. it is found that the juno’s mass hierarchy se... | atmospheric neutrinos in juno |
we compute the magnetic dipole moment (mdm) for massive flavor neutrinos using the neutrino self-energy in a magnetized media. the framework to incorporate neutrino masses is one minimal extension of the standard model in which neutrinos are dirac particles and their masses coming from tiny yukawa couplings from a seco... | neutrino self-energy with new physics effects in an external magnetic field |
orca (oscillation research with cosmics in the abyss) is the low-energy branch of km3net, the next-generation research infrastructure hosting underwater cherenkov detectors in the mediterranean sea. orca's primary goal is the determination of the neutrino mass hierarchy by measuring the matter-induced modifications on ... | prospects for measuring the neutrino mass hierarchy with km3net/orca |
project 8 is a tritium endpoint neutrino mass experiment utilizing a phased program to achieve sensitivity to the range of neutrino masses allowed by the inverted mass hierarchy. the cyclotron radiation emission spectroscopy (cres) technique is employed to measure the differential energy spectrum of decay electrons wit... | overview of project 8 and progress towards tritium operation |
the t2k experiment is a 295-km long-baseline neutrino experiment in japan employing an off-axis muon neutrino beam with a 0.6 gev peak energy. the beam, produced from 30-gev protons at the j-parc complex on the pacific coast, is directed to the super-kamiokande detector. t2k released the first long-baseline measurement... | new results from t2k |
we propose that the flavor structure of the standard model is based on a horizontal s u (2 ) symmetry. it generically predicts (i) a parametrically small mass for the lightest charged fermions, (ii) small mixings in the quark sector, and (iii) suppression of flavor-changing neutral currents. supplemented with the assum... | standard model flavor from an s u (2 ) symmetry |
we show that when sterile majorana neutrino masses are generated non-perturbatively through instantonic interactions in certain classes of string compactifications (e.g. type iia orientifold models with intersecting d-branes), then the eigenvalue spectrum for the tree-level mass term $m_p$ can be within the preferred r... | pev sterile masses from d-brane instantons -- motivating stringy neutrino options? |
a non-universal $u(1)_{x}$ extension to the standard model composed of two scalar doublets and two scalar singlets together with three additional quark singlets and two lepton singlets and three generations of right-handed and majorana neutrinos is made to explain lepton mass hierarchy, neutrino masses via inverse sees... | explaining muon $g-2$ anomaly in a non-universal $u(1)_{x}$ extended susy theory |
jiangmen underground neutrino observation (juno) mainly focuses on determining neutrino mass hierarchy. the central detector is one of the keys to juno experiment, which is a spherical liquid scintillator detector with 20 kton target mass. the target vessel of the central detector is a huge acrylic vessel with a diamet... | fe analysis on the thermoforming behaviour of large spherical pmma panelapplied in juno |
we discuss some known approaches and results as well as few new ideas concerning origins and nature of neutrino mass. the key issues include (i) connections of neutrino and charged fermions masses, relation between masses and mixing, energy scale of new physics behind neutrino mass where possibilities spread from the p... | riddle of the neutrino mass |
the littlest seesaw (ls) model involves two right-handed neutrinos and a very constrained dirac neutrino mass matrix, involving one texture zero and two independent dirac masses, leading to a highly predictive scheme in which all neutrino masses and the entire pmns matrix is successfully predicted in terms of just two ... | renormalisation group corrections to the littlest seesaw model and maximal atmospheric mixing |
we study the phenomenological consequences of recent results from atmospheric and accelerator neutrino experiments, favoring normal neutrino mass ordering $m_1 < m_2 < m_3$, a near maximal lepton dirac cp phase $\delta_{l}\sim 270^\circ$ along with $\theta_{23}\gtrsim 45^\circ$, for possible realization of natura... | implications of $\\delta^{cp}_l\\sim 270^\\circ$ and $\\theta_{23}\\gtrsim 45^\\circ$ for texture specific lepton mass matrices and $0\\nu \\beta \\beta$ decay |
within the framework of a beyond standard model (bsm) with a local $su(3)$ family symmetry, we report an updated fit of parameters which account for the known spectrum of quarks and charged lepton masses and the quark mixing in a $4\times 4$ non-unitary $v_{ckm}$. in this scenario, ordinary heavy fermions, top and bott... | charged fermion masses and mixing from a su(3) family symmetry model |
the detection of galactic supernova (sn) neutrinos represents one of the future frontiers of low-energy neutrino physics and astrophysics. the neutron coherence of neutral currents (nc) allows quite large cross sections in the case of neutron rich targets, which can be exploited in detecting earth and sky neutrinos by ... | neutral current coherent cross sections -- implications on gaseous spherical tpc's for detecting sn and earth neutrinos |
hyper-kamiokande (hyper-k) is a proposed next generation underground water cherenkov detector with a total (fiducial) mass of 516 (374) kilotons, approximately 10 (17) times as large as that of super-kamiokande. it will serve as a far detector of a long baseline neutrino oscillation experiment envisioned for the upgrad... | sensitivity of new physics by joint analysis of neutrino oscillation on hyper-kamiokande |
the large range of energies and pathlengths spanned by atmospheric neutrinos have made them a useful tool in the discovery and subsequent study of neutrino oscillations. with the recent measurement of the {{θ }13} mixing angle, though it is now known that all mixing angles and mass differences in the pmns oscillation f... | recent progress and future prospects with atmospheric neutrinos |
we investigate unification prospects of two heavy scalar triplet extension of the standard model where, in the absence of any right-handed neutrino (rhn), type-ii seesaw accounts for current oscillation data with hierarchical neutrino masses consistent with cosmological bounds and the lighter triplet decay explains bar... | su(5) unification of two triplet seesaw and leptogenesis with dark matter and vacuum stability |
the physics goals of nova are the constraints of neutrino oscillation parameters such as the octant of $\theta_{23}$, $\delta_{\rm{cp}}$, and the neutrino mass hierarchy via a joint fit to $\nu_{\mu}$ and $\nu_{e}$ oscillation spectrum. we do this by propagating $\nu_{\mu}$ from the world's most intense neutrino beam a... | systematic uncertainties and cross-checks for the nova joint $\\nu_\\mu$+$\\nu_e$ analysis |
we explore masses and mixings for dirac neutrinos in models where lepton number is conserved, under the guidance of a hidden, but broken, μ-τ exchange symmetry, that makes itself evident in the squared hermitian mass matrix. we study the parameter space in the most general theory as allowed by current neutrino oscillat... | dirac neutrino mixings from hidden μ-τ symmetry |
nova is a long-baseline neutrino experiment that uses an upgraded numi neutrino source at fermilab and a 14-kton detector at ash river, minnesota. the detector has a highly active, finely segmented design that offers superb event identification capability. this talk presents the latest $\nu_\mu$ ($\bar{\nu}_\mu$) disap... | results and prospects from nova |
flavour symmetries are fundamental tools in the search for an explanation to the flavour puzzle: fermion mass hierarchies, the neutrino mass ordering, the differences between the mixing matrices in the quark and lepton sector, can all find an explanation in models where the fermion generations undergo specific geometri... | on continuous flavour symmetries for neutrinos |
in recent papers, a microscopic model for the sm higgs mechanism has been proposed, and an idea how to determine the 24 quark and lepton masses of all three generations has emerged in that framework. this idea is worked out in detail here by accommodating the fermion masses and mixings to microscopic parameters. the to... | a microscopic approach to quark and lepton masses and mixings |
by using quark yukawa matrices only, we can construct renormalization invariants that are exact at the one-loop level in the standard model. one of them, iq, is accidentally consistent with unity, even though quark masses are strongly hierarchical. we calculate a lepton version of the invariant il for dirac and majoran... | renormalization group invariant of lepton yukawa couplings |
observation of supernovae (sn) through their neutrino emission is a fundamental point to understand both sn dynamics and neutrino physical properties. juno is a 20kton liquid scintillator detector, under construction in jiangmen, china. the main aim of the experiment is to determine neutrino mass hierarchy by precisely... | towards a reconstruction of supernova neutrino spectra in juno |
we propose a supersymmetric extension of the anomaly-free and three families nonuniversal $u(1)$ model, with the inclusion of four higgs doublets and four higgs singlets. the quark sector is extended by adding three exotic quark singlets, while the lepton sector includes two exotic charged lepton singlets, three right-... | a non-universal $u(1)_{x}$ gauge extension to the mssm |
in the binary-driven hypernova model of long gamma-ray bursts, a carbon-oxygen star explodes as a supernova in presence of a neutron star binary companion in close orbit. hypercritical (i.e. highly super-eddington) accretion of the ejecta matter onto the neutron star sets in, making it reach the critical mass with cons... | neutrino oscillations in a neutrino-dominated accretion disk around a kerr bh |
to reach the goal of determining the neutrino mass hierarchy, all parts of the juno experiment need to meet certain quality criteria, especially those which are related to the final energy resolution of the detector. this is relevant in particular for the 20'000 20-inch photomultiplier tubes (pmts) to be deployed in ju... | the pmt mass testing system for juno |
nova is a long-baseline off-axis beam neutrino experiment at fermilab and ash river, minnesota. by measuring ν_μ disappearance and ν_e appearance at the 14 kiloton nova far detector, the experiment is addressing outstanding questions in neutrino physics, including the neutrino mass hierarchy and existence of leptonic c... | the nova test beam program |
the jiangmen underground neutrino observatory (juno) is an experiment under construction in china with the primary goal of determining the neutrino mass hierarchy (mh) with reactor anti-neutrinos. the juno detector system consists of a central detector, an active veto system and a calibration system. the central detect... | the jiangmen underground neutrino observatory (juno) |
we propose an s 4 flavor model based on supersymmetric (susy) su(5) gut. the first and third generations of 10 dimensional representations in su(5) are all assigned to be 11 of s 4. the second generation of 10 is to be 12 of s 4. right-handed neutrinos of singlet 1 and three generations of overline{mathbf{5}} are all a... | susy su(5)× s 4 gut flavor model for fermion masses and mixings with adjoint, large θ 13 pmns |
the jiangmen underground neutrino observatory (juno) is a multi-purpose neutrino experiment under construction. the primary goal is to determine the neutrino mass hierarchy and precisely measure the oscillation parameters by detecting reactor anti-neutrinos. there will be around 20000 pmts with a large photo-cathode of... | the 20-inch pmt instrumentation for the juno experiment |
the jiangmen underground neutrino observatory (juno) is a reactor antineutrino experiment with the aim to determine the neutrino mass hierarchy. the detector will be filled with 20 kilotons of liquid scintillator and instrumented with 18000 20-inch pmts to achieve an unprecedented energy resolution of 3%@1 mev. a 35.4 ... | status of the juno reactor anti-neutrino experiment |
the jiangmen underground neutrino observatory (juno) is a 20kt liquid scintillator detector that will be located at kaiping, jiangmen city in south china. an energy resolution of 3% at 1 mev is required to determine the neutrino mass hierarchy (mh) by spectral analysis. in this largest liquid scintillator detector, a g... | gna fitter and detector response impact on mh sensitivity study |
the nova experiment at fermilab uses a beam of neutrinos and two detectors separated by an 810 km baseline to observe muon neutrino disappearance and electron neutrino appearance. these measurements have the potential to reveal the remaining unknowns in neutrino oscillations, namely the mass hierarchy, the 23 octant, a... | new results from nova |
the minos and minos+ experiment consists of two magnetised steel-scintillator tracking calorimeters, observing flavour change in the numi beam over 735 km. with eleven years of data from both νμand {\bar ν _μ } beam modes, in configurations with peak energies at 3 gev and 7 gev, the experiment has made precision measur... | new results from minos and minos+ |
the nova experiment uses the fermilab numi neutrino beam and a newly constructed 14 kt detector to address several open questions in neutrino oscillations including the neutrino mass hierarchy, the precise value of the angle θ23, and the cp-violating phase δcp. the experiment has been running since 2014 and has recentl... | first neutrino oscillation measurements in nova |
non-zero leptonic cp phases in the neutrino sector are clear evidence for physics beyond the standard model and have many implications in particle physics and cosmology. some clues to maximal dirac cp violation $\delta_{cp}=3\pi/2$ are reviewed. an approach to connect the dirac cp violation phase and the neutrino mass ... | an open window to neutrino mass hierarchy at maximal dirac cp violation |
we discuss the minimal seesaw model for the dirac cp violating phase of the lepton mixing matrix. we introduce two right-handed majorana neutrinos and obtain several textures of the tri-maximal lepton mixing matrices. moreover, we discuss the observed baryon asymmetry of the universe through the leptogenesis mechanism.... | towards the minimal seesaw model for the prediction of neutrino cp violation |
the nova experiment is a long-baseline accelerator-based neutrino oscillation experiment. it uses the upgraded numi beam from fermilab to measure electron-neutrino appearance and muon-neutrino disappearance between the near detector, located at fermilab, and the far detector, located at ash river, minnesota. the numi b... | results from the nova experiment |
in this talk we discuss how the zee-babu model can be tested combining information from neutrino data, low-energy experiments and direct searches at the lhc. we update previous analysis in the light of the recent measurement of the neutrino mixing angle θ13 [1], the new meg limits on μ → eγ [2], the lower bounds on dou... | testing the zee-babu model via neutrino data, lepton flavour violation and direct searches at the lhc |
a brief overview of the development of neutrino detectors for long-baseline oscillation experiments at accelerators and reactors is presented. basic principles and main features of detectors of running accelerator experiments t2k and noνa sensitive to a first level of cp violation and neutrino mass hierarchy, and react... | neutrino detectors for oscillation experiments |
heavy majorana neutrinos enter in many scenarios of physics beyond the standard model and play a special role in the leptogenesis framework as origin of the baryon asymmetry in the universe. in this thesis, we develop an effective field theory for non-relativistic majorana particles. we apply the effective field theory... | effective field theories for heavy majorana neutrinos in a thermal bath |
nova is an experiment devoted to studying neutrino oscillations in the numi neutrino beam from fnal (usa). it is a long-baseline experiment consisting of two functionally identical, finely granulated detectors which are separated by 810 km of earth crust and sited at 14 mrad off the beam axis. by measuring the transiti... | nova joint ν_e + ν_μ oscillation results in neutrino and antineutrino modes |
after the successful investigation and confirmation of non zero $\theta_{13}^{pmns}$ by various experiments, we are standing at a square where we still encounter a number of issues, which are to be settled. in this paper, we have extended our recent work towards a precise prediction of the $\theta_{23}^{pmns}$ mixing a... | quark-lepton complementarity model based predictions for $\\theta_{23}^{pmns}$ with neutrino mass hierarchy |
this book discusses the upgrade of the super-kamiokande (sk) detector, which consists in the addition of a salt of gadolinium into the detector's water, the goal being to endow it with a very high-efficiency ability to detect neutrons: the superk-gd project. this will substantially improve the scientific value of the s... | neutrino physics in present and future kamioka water-čerenkov detectors with neutron tagging |
neutrinos have an important role for energy loss process during advanced evolution of massive stars. although the luminosity and average energy of neutrinos during the si burning are much smaller than those of supernova neutrinos, these neutrinos are expected to be detected by the liquid scintillation neutrino detector... | neutrino emission from nearby supernova progenitors |
we find a realization of the z2 symmetry in the neutrino mass matrix which expresses a rotation of the μ -τ symmetry and is able to impose a generic smallest mixing angle, in contrast to a zero-value predicted by the usual nonrotated form of the μ -τ symmetry. we extend this symmetry for the lepton sector within the ty... | rotated μ -τ symmetry for one generic neutrino mixing angle: an analytical study |
the jiangmen underground neutrino observatory (juno) is proposed to determine the neutrino mass hierarchy using a 20 kiloton underground liquid scintillator detector (cd). one of the keys is the energy resolution of the cd to reach <3% at 1 mev, where totally 15,000 mcp-pmt will be used. the optimization of the 20-i... | signal optimization with hv divider of mcp-pmt for juno |
we study the consequences of the z2 symmetry behind the μ -τ universality in the neutrino mass matrix. we then implement this symmetry in the type-i seesaw mechanism and show how it can accommodate all sorts of lepton mass hierarchies and generate enough lepton asymmetry to interpret the observed baryon asymmetry in th... | neutrino mixing and leptogenesis in μ -τ symmetry |
if the cosmological limits on the sum of the neutrino masses are taken seriously we have first measurements of the masses of the neutrinos. using the planck experiment's limit $\sum_{i=1}^3{m_i} < 230 ~mev$ and some simple assumptions on measurement uncertainties the mass of the heaviest neutrino is $63\pm11 ~mev$ a... | the masses of the neutrinos |
we present the reach of the proposed ino-ical in measuring the atmospheric-neutrino-oscillation parameters $\theta_{23}$ and $\delta m^2_{32}$ using full event-by-event reconstruction for the first time. we also study the fluctuations in the data and their effect on the precision measurements and mass-hierarchy analysi... | study of neutrino oscillation parameters at the ino-ical detector using event-by-event reconstruction |
motivated by recent results from neutrino experiments, we study the neutrino masses and mixing in the framework of a susy s u (5 )×a4 model. the hybrid of type i and type ii seesaw mechanisms leads to the nonzero value of the reactor angle θ13≠0 and to the recently disfavored maximal atmospheric angle θ23≠4 5 ° by the ... | hybrid seesaw neutrino model in susy s u (5 )×a4 |
new generation of reactor neutrino experiments, daya bay and reno, have made definitive measurements of the smallest neutrino mixing angle θ13 in 2012, based on the disappearance of electron antineutrinos. more precise measurements of the mixing angle and reactor neutrino spectra have been made and presented. a rather ... | review of reactor neutrino experiments |
laguna-lbno is a design study funded by the european commission to develop the design of a large and deep underground neutrino observatory; its physics program involves the study of neutrino oscillations at long baselines, the investigation of the grand unification of elementary forces and the detection of neutrinos fr... | the laguna-lbno project |
we examine the pairs of neutrino mixing matrix and suggest pairs that can be used in the construction of new mixing patterns, with "pair" denoting the equality of the modulus of a pair of matrix elements. the results show that the trimaximal mixing in ν2 and the μ -τ interchange symmetry are good choices under current ... | examination of pairs in neutrino mixing matrix |
apart from the qualitative features described in paper i (ref. 1), the renormalization group equation derived for the rotation of the fermion mass matrices are amenable to quantitative study. the equation depends on a coupling and a fudge factor and, on integration, on 3 integration constants. its application to data a... | the framed standard model (ii) — a first test against experiment |
after the neutrino mixing angle $\theta_{13}$ has been precisely measured by the reactor antineutrino experiments, one of the most important open questions left in neutrino physics is the neutrino mass hierarchy. jiangmen underground neutrino observatory (juno) is designed to determine the neutrino mass hierarchy (mh) ... | neutrino mass hierarchy determination at reactor antineutrino experiments |
the prospects for future reactor neutrino experiments that would use tens of kilotons of liquid scintillator with a ∼ 50 km baseline are discussed. these experiments are generically dubbed "rrnold" for radical reactor neutrino oscillation liquid scintillator detector experiment. such experiments are designed to resolve... | future reactor neutrino experiments (rrnold)1 |
in several frameworks for leptons-sectors of two higgs doublet models, we calculate the magnetic dipole moment for the different flavor types of neutrino. computations are carried out by assuming a normal hierarchy for neutrino masses, and analyzing the process $\nu \rightarrow \nu \gamma $ with a charged higgs boson i... | phenomenology of the new physics coming from 2hdms to the neutrino magnetic dipole moment |
we study parameters of an extended standard model. the neutrino sector is enlarged by one or two right-handed singlet fields and the higgs sector contains one additional doublet. one-loop radiative corrections generate the mass for the light neutrino fields. the numerical analysis is performed varying the masses of hea... | seesaw neutrino masses with a second higgs doublet added |
the muon anomalous magnetic moment $a_\mu$ is studied in the infinite $\tan\beta$ limit of the mssm. since the muon mass arises completely from loop effects, large corrections to $a_\mu$ are expected in comparison to the usual case with moderately high $\tan\beta$. due to the qualitatively different parameter dependenc... | large muon $(g-2)$ from tev-scale mssm with infinite $\\tan\\beta$ |
neutrino oscillation from muon neutrino to electron neutrino, which is induced by non-zero θ13 mixing angle, is expected to be influenced largely due to matter effect in the multi-gev energy region in the atmospheric neutrinos. since matter effect occurs on either neutrino or anti-neutrino depending on neutrino mass hi... | atmospheric neutrino oscillation and mass hierarchy determination in super-kamiokande |
we present preliminary results on the measurement of neutrino oscillations with three years of data of the completed icecube neutrino observatory. with an energy threshold of about 10 gev, the detector is sensitive to the disappearance of atmospheric muon neutrinos. the effect is measured using a sample of high-quality... | results from atmospheric neutrino oscillations with icecube deepcore |
we assess the sensitivity to the lepton cp phase by accelerator and reactor experiments in the near future, characterizing it globally by means of the cp exclusion fraction measure. such measure quantifies what fraction of the δcp space can be excluded at given input values of θ23 and δcp. for some region of the parame... | learning about the cp phase in the next 10 years |
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