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we investigate the precision with which a neutron star gravitational binding energy can be measured through the supernova neutrino signal, without assuming any prior such as the energy equipartition hypothesis, mean energies hierarchy or constraints on the pinching parameters that characterize the neutrino spectra. we ... | measuring the neutron star compactness and binding energy with supernova neutrinos |
we study supersymmetric extra u(1) model with $s_4$ flavor symmetry. the flavor symmetry not only stabilizes proton but also suppresses the flavor changing processes without raising the supersymmetry breaking scale. after the flavor symmetry is broken, the yukawa hierarchy is realized by the froggatt-nielsen mechanism.... | lepton anomalous magnetic moments in an $s_4$ flavor-symmetric extra u(1) model |
we propose uv-completions of froggatt-nielsen-peccei-quinn models of fermion masses and mixings with flavored axions, by incorporating heavy fields. here, the u(1) froggatt-nielsen symmetry is identified with the peccei-quinn symmetry to solve the strong cp problem along with the mass hierarchies of the standard model ... | flavored axion in the uv-complete froggatt-nielsen models |
the masses of the charged fermion and the mixing angles among quarks are observed to be strongly hierarchical, while analogous parameters in the neutrino sector appear to be structureless or anarchical. we develop a class of unified models based on s u (5 ) symmetry that explains these differing features probabilistica... | anarchy with hierarchy: a probabilistic appraisal |
precision measurement of neutrino mixing parameters and the determination of mass hierarchy are the primary goals of present and upcoming neutrino experiments. in this work, we study the sensitivity of t2k, noνa and lbne experiments to discover leptonic charge parity (cp)-violation and the determination of neutrino mas... | revisiting the sensitivity studies for leptonic cp-violation and mass hierarchy with t2k, noνa and lbne experiments |
requiring the effective mass term for a category of fundamental dirac or majorana fermions of the same electric charge to be invariant under the translational transformations ψαl(r) → ψαl(r) + nαzψl(r) in the flavor space, where nαand zψl(r) stand respectively for the flavor-dependent complex numbers and a constant spi... | a translational flavor symmetry in the mass terms of dirac and majorana fermions |
in direct breaking of non-supersymmetric so(10) to the standard model, we investigate the possibility that dark matter (dm) decaying through its mixing with right-handed neutrino (rhν) produces high energy icecube neutrinos having type-i seesaw masses. instead of one universal mixing and one common heavy rhν mass propo... | matter parity violating dark matter decay in minimal so(10), unification, vacuum stability and verifiable proton decay |
the $\mu \leftrightarrow \tau$ symmetry has been ruled out by its predictions on the reactor and atmospheric angles, nevertheless, a breaking of this symmetry might provide correct values. for that reason, we build a non-renormalizable lepton model where the mixings arise from the spontaneous breaking of the $\mathbf{s... | soft breaking of the $\\mu\\leftrightarrow \\tau$ symmetry by $\\mathbf{s}_{4}\\otimes \\mathbf{z}_{2}$ |
we argue that the mixing phenomenon of a neutral meson formed by a fictitious massive quark will disappear, if the electroweak symmetry of the standard model (sm) is restored at a high energy scale. this disappearance is taken as the high-energy input for the dispersion relation, which must be obeyed by the width diffe... | dispersive determination of neutrino mass ordering |
the jiangmen underground neutrino observatory (juno) in china aiming to determine the neutrino mass hierarchy is under construction. a new kind of large area microchannel-plate photomultiplier tube (mcp-pmt) was put forward for the juno by the researchers in institute of high energy physics (ihep) in china. after break... | summary of the r&d of 20-inch mcp-pmts for neutrino detection |
we study in detail how neutrino perturbations can be followed in linear theory by using only terms up to l=2 in the boltzmann hierarchy. we provide a new approximation to the third moment and demonstrate that the neutrino power spectrum can be calculated to a precision of better than ~ 5% for masses up to ~ 1 ev and k ... | efficient calculation of cosmological neutrino clustering in the non-linear regime |
generalized cp symmetry of order 4 (cp4) is surprisingly powerful in shaping scalar and quark sectors of multi-higgs models. here, we extend this framework to the neutrino sector. we build two simple majorana neutrino mass models with unbroken cp4, which are analogous to ma's scotogenic model. both models use three hig... | radiative neutrino masses from order-4 cp symmetry |
we revisit the sensitivity study of the tokai-to-kamioka-and-korea (t2kk) and tokai-to-kamioka-and-oki (t2ko) proposals where a water cerenkov detector with the 100 kton fiducial volume is placed in korea (l = 1000 km) and oki island (l = 653 km) in japan, respectively, in addition to the super-kamiokande for determina... | revisiting t2kk and t2ko physics potential and ν _μ -{\\bar{ν }}_μ beam ratio |
a nonuniversal abelian extension u(1 ) x free from chiral anomalies is introduced into the standard model (sm), in order to evaluate its suitability in addressing the fermion mass hierarchy (fmh) by using seesaw mechanisms (ssm). in order to break the electroweak symmetry, three higgs doublets are introduced, which giv... | fermion mass hierarchy from nonuniversal abelian extensions of the standard model |
we describe a new mechanism — radiatively-induced gravitational leptogenesis — for generating the matter-antimatter asymmetry of the universe. we show how quantum loop effects in c and cp violating theories cause matter and antimatter to propagate differently in the presence of gravity, and prove this is forbidden in f... | leptogenesis from loop effects in curved spacetime |
we present a method that extends the capabilities of the pinpointing orbit-crossing collapsed hierarchical objects (pinocchio) code, allowing it to generate accurate dark matter halo mock catalogues in cosmological models where the linear growth factor and the growth rate depend on scale. such cosmologies comprise, amo... | simulating cosmologies beyond λcdm with pinocchio |
we present an origin of the vevs hierarchy in a non-minimal technicolour framework which is capable of explaining the flavour spectrum of the standard model along with neutrino masses and mixing, and simultaneously satisfying crucial experimental bounds. the technicolour scale in this framework can be lower such that a... | origin of the vevs hierarchy |
we carry out a phenomenological and analytical study of the texture structures for the majorana neutrino mass matrix characterized by one single equality between two independent matrix elements, with vanishing non-physical phases whose role in the definition we clarify. we find that fourteen textures are viable in both... | texture of one equality in neutrino mass matrix |
in this paper, we have estimated the neutrino mass ordering and the cp violation sensitivity of the proposed protvino to orca (p2o) experiment after 6 years of data-taking. both unitary and non-unitary $3\times 3$ neutrino mass mixing have been considered in the simulations. a forecast analysis deriving possible future... | effect of non-unitary mixing on the mass hierarchy and cp violation determination at the protvino to orca experiment |
the advent of the lhc, and the proposal of building future colliders as the ilc, both programmed to explore new physics at the tev scale, justify the recent interest in collider phenomenology of seesaw mechanisms whose signatures lie on tev scale or less. the most popular tev scale seesaw mechanisms are the inverse see... | inverse type ii seesaw mechanism and its signature at the lhc and ilc |
the 20 kt liquid scintillator (ls) juno detector is being constructed by the international collaboration in china, with the primary goal of addressing the question of neutrino mass ordering (hierarchy). the main challenge for juno is to achieve a record energy resolution, ~ 3% at 1 mev of energy released in the ls, whi... | large photocathode 20-inch pmt testing methods for the juno experiment |
it is shown that gravity can be incorporated into the standard model (sm) in a way solving the hierarchy problem. for this, the sm effective action in flat spacetime is adapted to curved spacetime via not only the general covariance but also the gauge invariance. for the latter, gauge field hard masses, induced by loop... | naturalizing gravity of the quantum fields, and the hierarchy problem |
the undetermined neutrino mass hierarchy may leave an observable imprint on the neutrino fluxes from a core-collapse supernova (sn). the interpretation of the observables, however, is subject to the uncertain sn models and the flavor conversion mechanism of neutrinos in a sn. we attempt to propose a qualitative interpr... | signatures of the neutrino mass hierarchy in supernova neutrinos |
we report the neutrino mass hierarchy (mh) determination of medium baseline reactor neutrino experiments with multiple detectors, where the sensitivity of measuring the mh can be significantly improved by adding a near detector. then the impact of the baseline and target mass of the near detector on the combined mh sen... | mass hierarchy sensitivity of medium baseline reactor neutrino experiments with multiple detectors |
effective field theoretic description of dark matter fluid on large scales predicts viscosity of the order 10-6 h0 mp2. recently, it has been shown that the same magnitude of viscosity can resolve the discordance between large scale structure observations and planck cmb data in the σ8-ωm0 and h0-ωm0 parameters space. o... | bounds on neutrino mass in viscous cosmology |
the rates for generating a matter-antimatter asymmetry in extensions of the standard model (sm) containing right-handed neutrinos are the most interesting and least trivial co\-efficients in the rate equations for baryogenesis through thermal leptogenesis. we obtain a relation of these rates to finite-temperature real-... | lepton asymmetry rate from quantum field theory: nlo in the hierarchical limit |
the jiangmen underground neutrino observatory (juno) is designed to determine the neutrino mass hierarchy using a 20 kton liquid scintillator detector. to calibrate the detector boundary effect, the guide tube calibration system (gtcs) has been designed to deploy a radioactive source along a given longitude on the oute... | design of the guide tube calibration system for the juno experiment |
we propose a unique lepton mixing scheme and its association with an exact hierarchy-philic neutrino mass matrix texture in the light of a hybrid type seesaw mechanism under the framework of $a_4 \times z_3 \times z_{10}$ discrete flavour symmetry. | a realistic neutrino mixing scheme arising from $a_4$ symmetry |
a mechanism to generate realistic fermion mass hierarchies based on supersymmetric gauged $u(1)_f$ symmetry in flat five-dimensional (5d) spacetime is proposed. the fifth dimension is compactified on $s^1/z_2$ orbifold. the standard model fermions charged under the extra abelian symmetry along with their superpartners ... | fermion mass hierarchies from supersymmetric gauged flavour symmetry in 5d |
in this paper, we present a model which employs cp × z3 symmetries where quark mixing and charged leptons masses are explained by following some texture. to achieve neutrino mass and mixing, we write a nonrenormalizable lagrangian using type ii seesaw mechanism by assuming 𝒪(1) couplings predicting no cp violation. th... | fermion mass hierarchy and lepton flavor violation using cp symmetry |
the existence of heavy mirror analogs of ordinary fermions would provide deeper insight into the gedanken paradox appearing in the standard model upon direct parity violation and consisting in a physical distinguishability of left- and right-hand coordinate frames. arguments are presented in support of the statement th... | quark and lepton mixing as manifestations of violated mirror symmetry |
in the paradigm with a small warped spacelike extra dimensions (sed), the higgs field is in general localized at a boundary of the sed (tev-brane) where the gravity scale is redshifted to the tev by a warp factor. if the sm gauge bosons and fermions propagate into the warped sed, one can generate the mass hierarchy for... | compactified spacelike extra dimension & brane-higgs field |
in direct breaking of non-supersymmetric so(10) to the standard model, we investigate the possibility that dark matter (dm) decaying through its mixing with right-handed neutrino (rh$\nu$) produces high energy icecube neutrinos having type-i seesaw masses. instead of one universal mixing and one common heavy rh$\nu$ ma... | matter parity violating dark matter decay in minimal so(10), unification, vacuum stability and verifiable proton decay |
we obtain a phenomenologically acceptable pmns matrix in a flipped su(5) model, possessing the z4r discrete symmetry, from the compactification of heterotic string e8 × e8‧. to analyze the jarlskog determinant efficiently, we include the simple kim-seo form for the pontecorbo-maki-nakagawa-sakata matrix. we also noted ... | leptonic cp violation in flipped su(5) gut from z12-i orbifold compactification |
we consider a restricted type-i seesaw scenario with four texture zeros in the neutrino yukawa matrix, in the weak basis where both the charged-lepton yukawa matrix and the majorana mass matrix for right-handed neutrinos are diagonal and real. inspired by grand unified theories, we further require the neutrino yukawa m... | confronting four zero neutrino yukawa textures with n2 -dominated leptogenesis |
in this work we study a predictive model based on a partially unified theory possessing the gauge symmetry of the pati-salam group, $su(2)_l\times su(2)_r\times su(4)_c$ supplemented by a global peccei-quinn symmetry, $u(1)_{pq}$. a comprehensive analysis of the higgs potential is carried out in a minimal set-up. the a... | fermion masses and mixings, leptogenesis and baryon number violation in pati-salam model |
the strong c p problem is known to be solved by imposing peccei-quinn (pq) symmetry. however, the domain wall problem caused by the spontaneous breaking of its remnant discrete subgroup could make models invalid in many cases. we propose a model in which the pq charge is assigned quarks so as to escape this problem wit... | possible roles of peccei-quinn symmetry in an effective low energy model |
atmospheric neutrino experiments can determine the neutrino mass hierarchy for any value of $\delta_{cp}$. the iron calorimeter (ical) detector at the india-based neutrino observatory can distinguish between the charged current interactions of $\nu_\mu$ and $\bar{\nu}_\mu$ by determining the charge of the produced muon... | improving the hierarchy sensitivity of ical using neural network |
we present a simple extension of the standard model with three right-handed neutrinos in a susy framework, with an additional u(1) f abelian flavor symmetry with a non standard leptonic charge le-lμ-lτ for lepton doublets and arbitrary right-handed charges. our model predicts an inverted neutrino mass hierarchy and it ... | neutrino mixing and leptogenesis in a le-lμ-lτ model |
a brief review of the assignment of elementary fermions and bosons to irreducible multiplets in grand unified e6 models is followed by a discussion of different, hierarchical symmetry breaking chains from e6 down to su(3)c × u(1)_{em}. we concentrate here on a model with an intermediate pati-salam symmetry for which (b... | masses and mixing of neutral leptons in a grand unified e 6 model with intermediate pati-salam symmetry |
the future long baseline experiments such as dune and t2hkk have promising prospects to determine the neutrino mass hierarchy and measuring standard $cp$ phase $\delta$. however, presence of possible non-standard interactions of neutrinos with matter may intricate this picture and is the subject matter of the present w... | non-standard interactions and prospects for studying standard parameter degeneracies in dune and t2hkk |
we analyze fermion masses and mixing in a general warped extra dimensional model, where all the standard model (sm) fields, including the higgs, are allowed to propagate in the bulk. in this context, a slightly broken flavor symmetry imposed universally on all fermion fields, without distinction, can generate the full ... | fermion masses and mixing in general warped extra dimensional models |
we perform a comprehensive analysis of several phenomenological aspects of the renormalizable extension of the inert 3-3-1 model with sequentially loop-generated sm fermion mass hierarchy. special attention is paid to the study of the constraints arising from the experimental data on the $\rho$ parameter, as well as th... | higgs and gauge boson phenomenology of the 3-3-1 model with cks mechanism |
we provide a unified description of fermion masses and mixing angles in the framework of a supersymmetric grand unified so(10) model with anarchic yukawa couplings of order unity. the space-time is five dimensional and the extra flat spatial dimension is compactified on the orbifold $s^1/(z_2 \times z_2')$, leading to ... | a realistic pattern of fermion masses from a five-dimensional so(10) model |
using the type ii seesaw approach and properties of discrete flavor symmetry group representations, we build a supersymmetric a4×a3 neutrino model with θ13≠0 . after describing the basis of this model—which is beyond the minimal supersymmetric standard model—with a superfield spectrum containing flavons in a4×a3 repres... | type ii seesaw supersymmetric neutrino model for θ13≠0 |
we propose a new production mechanism for kev sterile neutrino dark matter which relies neither on the oscillations between sterile and active neutrinos nor on the decay of additional heavier particles. the dark matter neutrinos are instead produced by thermal freeze-out, much like a typical wimp. the challenge consist... | reviving kev sterile neutrino dark matter |
the radiative neutrino mass model with inert doublet dark matter is a promising model for the present experimental issues which cannot be explained within the standard model. we study an extension of this model focusing on cosmological features brought about from the scalar sector. inflation due to singlet scalars with... | inflation due to a nonminimal coupling of singlet scalars in the radiative seesaw model |
the standard model does not explain the hierarchy problem. before the discovery of nonzero lepton mixing angle θ 13 high hopes in explanation of the shape of the lepton mixing matrix were combined with non-abelian symmetries. nowadays, assuming one higgs doublet, it is unlikely that this is still valid. texture zeroes,... | texture zeros in neutrino mass matrix |
the scotogenic model generates majorana neutrino masses radiatively, with dark matter particles running in the loop. we explore the parameter space in which the relic density of fermionic dark matter is generated via a conversion-driven freeze-out mechanism. the necessity for small yukawa couplings to initiate chemical... | dark matter and radiative neutrino masses in conversion-driven scotogenesis |
we present the reach of the proposed ino-ical in measuring the atmospheric-neutrino-oscillation parameters θ _{23} and δ m^2_{32} using full event-by-event reconstruction for the first time. we also study the fluctuations arising from the low event statistics and their effect on the precision measurements and mass-hier... | study of neutrino oscillation parameters at the ino-ical detector using event-by-event reconstruction |
i reflect on some of the basic aspects of present day beyond the standard model particle physics, focusing mostly on the issues of naturalness, in particular on the so-called hierarchy problem. to all of us, physics as natural science emerged with galileo and newton, and led to centuries of unparalleled success in expl... | natural philosophy versus philosophy of naturalness |
the seesaw mechanism is the preferred methodology to obtain light neutrino masses by the introduction of a majorana mass matrix. moreover, radiative corrections can be done in order to improve the predictions of the model. however, when such a majorana mass has no inverse, radiative corrections turn out as the only mec... | radiative neutrino masses with forbidden seesaw mechanism in an abelian extension of the standard model |
to address fermion mass hierarchy and flavor mixings in the quark and lepton sectors, a minimal flavor structure without any redundant parameters beyond phenomenological observables is proposed via decomposition of the standard model yukawa mass matrix into a bi-unitary form. after reviewing the roles and parameterizat... | a unified yukawa interaction for the standard model of quarks and leptons |
in this paper, we propose a scheme for neutrino mass generation. a higgs singlet is introduced in the standard model of particle physics (sm). all of this new singlet and the charged and neutral higgs fields in the original higgs doublet are assumed to have nonzero vacuum expectation values (vevs). the normal hierarchy... | a higgs doublet + higgs singlet scheme with negative kinetic term for neutrino mass generation |
the production of electroweak z bosons that decay to neutrinos and recoil against jets with large transverse momentum p⊥ is an important background process to searches for dark matter at the large hadron collider (lhc). to fully benefit from opportunities offered by the future high-luminosity lhc, the theoretical descr... | two-loop qcd-ew master integrals for z plus jet production at large transverse momentum |
to demonstrate that matrices of seesaw type lead to a hierarchy in the neutrino masses, i.e. that there is a large gap in the singular spectrum of these matrices, one generally uses an approximate block-diagonalization procedure. in this note we show that no approximation is required to prove this gap property if the c... | a remark on the mathematics of the seesaw mechanism |
in this paper, we argue that an extension of the standard model with a single leptoquark and three right-handed neutrinos can explain the excess in the first-generation leptoquark search at the lhc. we also find that when the leptoquark has similarly sized couplings to all three generations, it produces additional sign... | signatures of leptoquarks at the lhc and right-handed neutrinos |
the mechanism of broken mirror symmetry may be the reason behind the appearance of the observed weak-mixing matrix for leptons that has a structure involving virtually no visible regularities (flavor riddle). special features of the standard model such as the particle-mass hierarchy and the neutrino spectrum deviating ... | structures of the neutrino mass spectrum and of lepton mixing as results of mirror-symmetry breaking |
the magnetised 51 kton iron calorimeter (ical) detector proposed to be built at ino is designed with a focus on detecting 1-20 gev muons. the magnetic field will enable the measurement of the momentum of the μ - and μ + generated from the charge current interactions of atmospheric νμ and ν̅μ separately within iron in t... | magnetic field measurements on the mini-ical detector using hall probes |
the study of atmospheric neutrinos crossing the earth can provide tomographic information on the earth's interior, complementary to the standard geophysics methods. this contribution presents an updated study of the potential of the km3net-orca detector for neutrino oscillation tomography of the earth, showing that aft... | earth tomography with neutrinos in km3net-orca |
a second light higgs boson, with mass of approximately 145 gev, is predicted by non-minimal supersymmetric models. this new particle can account for an apparent \sim 3 \sigma excess recorded by the cms experiment at the large hadron collider (lhc) during run 1. we show how this can be explained in a particular realisat... | can we have another light (~ 145 gev) higgs boson? |
the affleck-dine leptogenesis scenario along the lhuflat direction is reconsidered. it is known that successful affleck-dine leptogenesis requires that the lightest neutrino mass is extremely small. this situation can be significantly relaxed if the neutrino mass in the early universe is different from the present one.... | affleck-dine leptogenesis with varying peccei-quinn scale |
i suggest an effective model between the gut and the electroweak scale. it only introduces the two symmetries of u(1) b - l and u(1)d besides the sm groups. the two symmetries are individually broken at the reheating temperature of the universe of 1012 gev and the scale of 3 ∼ 4 tev. the model can simultaneously accomm... | a model of the matter-antimatter asymmetry and cold dark matter with u(1)b - l ⊗ u(1)d |
we have set up a light scattering spectrometer to study the depolarization of light scattering in linear alkylbenzene. the scattering spectra show that the depolarized part of light scattering is due to rayleigh scattering. the additional depolarized rayleigh scattering can make the effective transparency of linear alk... | spectroscopic study of light scattering in linear alkylbenzene for liquid scintillator neutrino detectors |
it is the goal of the so-called "yukawaon" model to give a unified description of masses, mixing, and c p violation parameters of quarks and leptons without using any hierarchical (family number-dependent) parameters besides the charged lepton masses. however, in the conventional model so far, we have compelled ourselv... | origin of hierarchical structures of quark and lepton mass matrices |
motivated by the short-baseline neutrino oscillation anomalies that suggest the existence of sterile neutrinos at the ev scale, we construct a scenario of a seesaw mechanism for 3 +1 light neutrinos implemented by warped compactification of an extra dimension. as the seesaw mechanism necessitates at least two right-han... | ev-scale sterile neutrinos from an extra dimension |
we rewrite the yukawa interactions of the standard model in terms of flavor-dependent vacuum structure to address the family mass hierarchy and cp violation in both the quark sector and lepton sector. it is realized that yukawa terms only include the same number of degrees of freedom as phenomenological observables wit... | the common origin of the family mass hierarchy and cp violation from flavor-dependent vacuum for quarks and leptons |
we present a formulation of cosmological-perturbation theory where the boltzmann hierarchies that evolve the neutrino phase-space distributions are replaced by integrals that can be evaluated easily with fast fourier transforms. the simultaneous evaluation of these integrals combined with the differential equations for... | cosmological perturbations: noncold relics without the boltzmann hierarchy |
we consider an expansion of the type-i seesaw mechanism by the inverse of the 3-3 matrix element $1/(m_{r})_{33}$ of the mass matrix of right-handed neutrinos $m_{r}$. conditions of such a situation are obtained for $m_{r}$ and the dirac mass matrix $m_{d}$. in this case, a partial $z_{2}$ symmetry such as $s m_{d} p_{... | $1/(m_{r})_{33}$ expansion of the type-i seesaw mechanism and partial $z_{2}$ symmetry for tm$_{1,2}$ mixing |
the answer to the question in the title is: in search of new physics beyond the standard model, for which there are many motivations, including the likely instability of the electroweak vacuum, dark matter, the origin of matter, the masses of neutrinos, the naturalness of the hierarchy of mass scales, cosmological infl... | where is particle physics going? |
we propose a theory of quark and lepton mass and mixing with non-universal z′ couplings based on a 5d standard model with quarks and leptons transforming as triplets under a new gauged so(3) isospin. in the 4d effective theory, the so(3) isospin is broken to u(1)′, through a s1/(&z;2×&z;2t) orbifold, then subsequently ... | quark and lepton mass and mixing with non-universal z′ from a 5d standard model with gauged so(3) |
the jiangmen neutrino underground observatory (juno) is a 20 kton liquid scintillator detector currently under construction near kaiping in china. the physics program focuses on the determination of the neutrino mass hierarchy with reactor anti-neutrinos. for this purpose, juno is located 650 m underground with a dista... | muon reconstruction with a geometrical model in juno |
seesaw mechanism constrains from below mixing between active and sterile neutrinos for fixed sterile neutrino masses. signal events associated with sterile neutrino decays inside a detector at fixed target experiment are suppressed by the mixing angle to the power of four. therefore sensitivity of experiments such as s... | numerical estimate of minimal active-sterile neutrino mixing for sterile neutrinos at gev scale |
we consider a texture for the neutrino mass matrix characterized by one vanishing 2 ×2 subtrace. we analyze phenomenologically and analytically all the six possible patterns, and show that all nonsingular ones are able to accommodate the experimental bounds, whereas singular patterns allow for only four inverted-hierar... | texture of single vanishing subtrace in neutrino mass matrix |
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 |
we present the approximated analytic expressions for the muon survival probability in a $3+1$ mixing scenario in the presence of matter effect using the s-matrix formalism. we find that all the individual terms contributing to the muon survival probability can significantly reduce to just three contributions. the leadi... | zoom in muon survival probability with sterile neutrino for cp and t-violation |
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 × so(n)r gauge metacolor forces. the strengthening of the 't hooft's anomaly matching condition, when the massless fermion composites are require... | the su(8) gut with composite quarks and leptons |
in this paper, we introduce an extension of the standard model, based on su(3)$_\mathrm{c}\times $su(3)$_\mathrm{l}\times $u(1)$_x$ gauge symmetry (331-model). the 331-models traditionally explain the number of fermion familes in nature. in our model the froggatt-nielsen mechanism is incorporated into the 331-setting i... | neutrino mass via linear seesaw, 331-model and froggatt-nielsen mechanism |
we propose a clifford algebra approach to chiral symmetry breaking and fermion mass hierarchies in the context of composite higgs bosons. standard model fermions are represented by algebraic spinors of six-dimensional binary clifford algebra, while ternary clifford algebra-related flavor projection operators control al... | a clifford algebra approach to chiral symmetry breaking and fermion mass hierarchies |
the neutrino sector of a seesaw-extended standard model is investigated under the anarchy hypothesis. the previously derived probability density functions for neutrino masses and mixings, which characterize the type i-iii seesaw ensemble of n × n complex random matrices, are used to extract information on the relevant ... | anarchy and neutrino physics |
i discuss the motivation for the neutrino mass hierarchy determination, the methods to access the mass hierarchy, and technological approaches using these methods. | neutrino mass hierarchy: theory and phenomenology |
the observed hierarchy in the fermion masses, which imply a set of small mass ratios, is not naturally small regarding 't hooft's criteria. in this work, in a model independent approach, we introduce a set of conditions by which fermion mass ratios become natural. interestingly, these conditions demand that fermion mix... | the mass ratios parametrization |
we construct a multiscalar and non-renormalizable model where the $\mathbf{s}_{3}$ flavor symmetry drives mainly the yukawa couplings. in the quark sector, the nearest neighbor interaction (nni) textures are behind the ckm mixing matrix so that this is fitted in good agreement with the last available results. in the le... | flavored multiscalar $\\mathbf{s}_{3}$ model with normal hierarchy neutrino mass |
the magnetised 51 kton iron calorimeter (ical) detector proposed to be built at ino is designed with a focus on detecting 1-20 gev muons. the magnetic field will enable the measurement of the momentum of the $\mu^-$ and $\mu^+$ generated from the charge current interactions of $\nu_\mu$ and $\bar\nu_\mu$ separately wit... | magnetic field measurements on the mini-ical detector using hall probes |
we propose a next-to-minimal supersymmetric standard model (nmssm) extended by an $\mathbb{a}_{4}\times \boldsymbol{z}_{3}$ flavor symmetry and three right-handed neutrinos providing a detailed study of the neutrino sector and a solution to the domain wall problem. in this proposal, neutrino masses are generated throug... | neutrino phenomenology in the flavored nmssm without domain wall problems |
flavor democracy broken in the fermion mass matrix by means of small perturbations can give rise to hierarchical fermion masses. we study the breaking of the s3l × s3r symmetry associated with democratic mass matrices to a smaller exchange symmetry s2l × s2r in the charged lepton, up and down quark sectors. an addition... | breaking flavor democracy with symmetric perturbations |
a simple standard model extension based on $t_7$ flavor symmetry which accommodates lepton mass and mixing with non-zero $\theta_{13}$ and cp violation phase is proposed. at the tree- level, the realistic lepton mass and mixing pattern is derived through the spontaneous symmetry breaking by just one vacuum expectation ... | lepton mass and mixing in a simple extension of the standard model based on t7 flavor symmetry |
for majorana as well as dirac neutrinos, attempt has been made to carry out a comparative study of the predictions of fritzsch-like texture 6, 5 and 4 zero leptonic mass matrices. in particular, considering normal hierarchy of neutrino masses, we have examined how the parameter space available to the mixing angles with... | texture zero mass matrices and nature of neutrinos |
we study the non-hermitian extension of the lagrangian of the standard model extended by singlet right-handed heavy neutrinos. the yukawa coupling matrices comprise of hermitian and non-hermitian components and the neutrino mass eigenvalues are calculated for three generation case. the increased number of unknown param... | neutrino mass observables and non-hermitian version of type-i seesaw model |
we study all possible texture zeros in the majorana neutrino mass matrix which are allowed from neutrino oscillation as well as cosmology data when the charged lepton mass matrix is assumed to take the diagonal form. in case of one-zero texture, we write down the majorana phases which are assumed to be equal and the li... | discriminating majorana neutrino textures in the light of baryon asymmetry |
the jiangmen underground neutrino observatory is proposed to determine neutrino mass hierarchy using a 20 ktonne liquid scintillator detector. strict radio-purity requirements have been put forward for all the components of the detector. according to the mc simulation results, the radon dissolved in the water cherenkov... | developing the radium measurement system for the water cherenkov detector of the jiangmen underground neutrino observatory |
we propose a theory of quark and lepton mass and mixing with non-universal $z'$ couplings based on a 5d standard model with quarks and leptons transforming as triplets under a new gauged $so(3)$ isospin. in the 4d effective theory, the $so(3)$ isospin is broken to $u(1)'$, through a $s^1/(\mathbb{z}_2\times \mathbb{z}'... | quark and lepton mass and mixing with non-universal $z'$ from a 5d standard model with gauged $so(3)$ |
in a recent combined analysis of short baseline neutrino oscillation data by conrad et al it is shown that (3+3) neutrino model, defined by three active and three sterile neutrinos, results in an overall goodness of $67\%$ and a compatibility of $90\%$ among all data sets - to be compared to the compatibility of $0.043... | earth matter effect on atmospheric neutrino oscillation in (3+3) model |
the most important discovery in particle physics in recent years was that of the higgs boson, and much effort is continuing to measure its properties, which agree obstinately with the standard model, so far. however, there are many reasons to expect physics beyond the standard model, motivated by the stability of the e... | particle physics today, tomorrow and beyond |
we consider the neutrino masses and mixing in the framework of so(10) guts with hidden sector consisting of fermionic and bosonic so(10) singlets and flavor symmetries. the framework allows to disentangle the ckm physics responsible for the ckm mixing and different mass hierarchies of quarks and leptons and the neutrin... | neutrino mixing and masses in so(10) guts with hidden sector and flavor symmetries |
we consider the phenomenology of new neutral gauge bosons with flavour non-diagonal couplings to fermions, inherent in 6d models explaining successfully the hierarchy of masses as well as the mixing for quarks, charged leptons and neutrinos (this model can in particular be credited with the correct prediction of the ne... | flavour changing z ' signals in a 6d inspired model |
the effects of lorentz invariance violation(liv) operators up to dimension 6 in long baseline neutrino experiments are discussed, in specific for dune and t2k. a phenomenological lagrangian is proposed followed by a computation of the effective hamiltonian of neutrino propagation in matter for mass eigenstates. it is s... | shadowing neutrino mass hierarchy with lorentz invariance violation |
recent studies on swampland conjectures (e.g. non-susy ads conjecture or ads distance conjecture) predict that the (lightest) neutrino must be dirac and the mass must be cosmologically small m < cλcc1/4 ∼ 10mev. the dirac neutrino naturally accompanies a u(1) symmetry that can be embedded in the anomaly-free u(1)b−l... | further swampland constraint on dirac neutrino |
we discuss the leptonic flavor structure generated by a brane shifted extra dimensional seesaw model with a single right handed neutrino in the bulk. in contrast to previous works, no unitarity approximation for the 3 × 3 submatrix has been employed. this allows to study phenomenological signatures such as lepton flavo... | leptonic flavor structure in the brane shifted extra dimensional seesaw mechanism |
we consider the neutrino masses and mixing in the framework of so(10) guts with hidden sector consisting of fermionic and bosonic so(10) singlets and flavor symmetries. the framework allows to disentangle the ckm physics responsible for the ckm mixing and different mass hierarchies of quarks and leptons and the neutrin... | neutrino mixing and masses in so(10) guts with hidden sector and flavor symmetries |
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