abstract stringlengths 3 192k | title stringlengths 4 857 |
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charged-lepton flavour-violating (clfv) processes offer deep probes for new physics with discovery sensitivity to a broad array of new physics models - susy, higgs doublets, extra dimensions, and, particularly, models explaining the neutrino mass hierarchy and the matter-antimatter asymmetry of the universe via leptoge... | a submission to the 2020 update of the european strategy for particle physics on behalf of the comet, meg, mu2e and mu3e collaborations |
we revisit a model in which neutrino masses and mixing are described by a two right-handed (rh) neutrino seesaw scenario, implying a strictly hierarchical light neutrino spectrum. a third decoupled rh neutrino, ndm with mass mdm, plays the role of cold dark matter (dm) and is produced by the mixing with a source rh neu... | unifying leptogenesis, dark matter and high-energy neutrinos with right-handed neutrino mixing via higgs portal |
we propose a viable model based on the su(3)_c× su(3)_l× u(1)_x gauge group, augmented by the u(1)_{l_g} global lepton number symmetry and the δ (27) × z_3× z_{16} discrete group, capable of explaining the standard model (sm) fermion masses and mixings, and having a low scale seesaw mechanism which can be tested at the... | the first δ (27) flavor 3-3-1 model with low scale seesaw mechanism |
a complete study on the fermion masses and flavor mixing is presented in a non-minimal left-right symmetric model (nmlrms) where the s3⊗ z2⊗ ze2 flavor symmetry drives the yukawa couplings. in the quark sector, the mass matrices possess a kind of generalized fritzsch textures that allow us to fit the ckm mixing matrix ... | flavored non-minimal left-right symmetric model fermion masses and mixings |
incorporating three generations of right-handed majorana neutrinos to quintessential inflation, we construct a model which simultaneously explains inflation, dark energy, dark matter and baryogenesis. these neutrinos have hierarchical masses m3 ∼1013gev ,m2 ∼1011gev ,m1 ∼ 10kev and are produced by gravitational particl... | dark matter and baryon-number generation in quintessential inflation via hierarchical right-handed neutrinos |
we propose a viable model based on the $su(3)_c\times su(3)_l\times u(1)_x$ gauge group, augmented by the $u(1)_{l_g}$ global lepton number symmetry and the $\delta(27) \times z_3\times z_{16}$ discrete group, capable of explaining the standard model (sm) fermion masses and mixings, and having a low scale seesaw mechan... | the first $\\delta(27)$ flavor 3-3-1 model with low scale seesaw mechanism |
particle physics has arrived at an important moment of its history. the discovery of the higgs boson has completed the standard model, the core theory behind the known set of elementary particles and fundamental interactions. however, the standard model leaves important questions unanswered, such as the nature of dark ... | future circular colliders succeeding the lhc |
we propose a renormalizable theory with minimal particle content and symmetries, that successfully explains the number of standard model (sm) fermion families, the sm fermion mass hierarchy, the tiny values for the light active neutrino masses, the lepton and baryon asymmetry of the universe, the dark matter relic dens... | minimal model for the fermion flavor structure, mass hierarchy, dark matter, leptogenesis, and the electron and muon anomalous magnetic moments |
we discuss the correlation between the cp violating dirac phase of the lepton mixing matrix and the cosmological baryon asymmetry based on the leptogenesis in the minimal seesaw model with two right-handed majorana neutrinos and the trimaximal mixing for neutrino flavors. the sign of the cp violating dirac phase at low... | neutrino cp violation and sign of baryon asymmetry in the minimal seesaw model |
recent studies provide evidence that long-baseline (lbl) experiments are sensitive to the extra c p phases involved with light sterile neutrinos, whose existence is suggested by several anomalous short-baseline (sbl) results. we show that, within the 3 +1 scheme, the combination of the existing sbl data with the lbl re... | joint short- and long-baseline constraints on light sterile neutrinos |
we study quark and lepton mass matrices with the common modulus τ in the a4 modular symmetry. the viable quark mass matrices are composed of modular forms of weights 2, 4 and 6. it is remarked that the modulus τ is close to i, which is a fixed point in the fundamental region of sl (2 , z) , and the cp symmetry is not v... | quark and lepton flavors with common modulus τ in a4 modular symmetry |
we extend the recently proposed s u (5 )×t13 model for the asymmetric texture to the up-type quark and seesaw sectors. the hierarchical up-type quark masses are generated from higher-dimensional operators involving family-singlet higgses, gauge-singlet familons, and vectorlike messengers. the complex-tribimaximal seesa... | tribimaximal mixing in the s u (5 )×t13 texture |
in this letter, we consider exact μ - τ reflection symmetries for quarks and leptons. fermion mass matrices are assumed to be four-zero textures for charged fermions f = u , d , e and a symmetric matrix for neutrinos νl. by a bi-maximal transformation, all the mass matrices lead to μ - τ reflection symmetric forms, whi... | interplay between exact μ - τ reflection symmetries, four-zero texture and universal texture |
twin higgs models solve the little hierarchy problem without introducing new colored particles; however, they are often in tension with measurements of the radiation density at late times. here we explore viable cosmological histories for twin higgs models. in particular, we show that mixing between the standard model ... | viable twin cosmology from neutrino mixing |
in the type i seesaw model, the naturalness requirement that corrections to the electroweak μ parameter not exceed 1 tev results in a rough bound on the lightest right-handed neutrino mass, mn1≲3 ×1 07 gev . in this paper we derive generic bounds applicable in any three-flavor type i seesaw model. we find mn1≲4 ×1 07 g... | electroweak naturalness in the three-flavor type i seesaw model and implications for leptogenesis |
searches for charged lepton flavor violation (clfv) offer deep probes for a range of new physics scenarios, such as super-symmetric models, theories involving scalar leptoquarks or additional higgs doublets, and models explaining the neutrino mass hierarchy and the matter-antimatter asymmetry of the universe via leptog... | experimental searches for muon to electron conversion in a nucleus: comet, deeme, and mu2e. a contributed paper for snowmass 21 |
we propose a scheme, based on δ (27 ) flavor symmetry and supplemented by other discrete symmetries and the inverse seesaw mechanism, where both the light neutrino masses and the deviation from tribimaximal mixing matrix can be linked to the source of lepton number violation. the hierarchies of the charged leptons are ... | neutrino masses and deviation from tribimaximal mixing in δ (27 ) model with inverse seesaw mechanism |
we study a texture of neutrino mass matrix characterized by two constraints consisting of one equality and another antiequality between two elements corresponding to two pairs of the matrix entries. amidst such textures, we limit our study to three patterns which were realizable assuming an $s_4$-symmetry within type i... | textures of neutrino mass matrix from $s_4$-flavor symmetry |
background: the study of low-energy neutrinos and their interactions with atomic nuclei is crucial to several open problems in physics, including the neutrino mass hierarchy, c p violation, candidates of physics beyond the standard model, and supernova dynamics. examples of experiments include captain at the spallation... | forbidden transitions in neutral- and charged-current interactions between low-energy neutrinos and argon |
in this letter, we perform a chiral perturbative analysis by singular values $m_{di}$ of the dirac mass matrix $m_{d}$ for the type-i seesaw mechanism. in the basis where $m_{d} = v m_{d}^{\rm diag} u^{\dagger}$ is diagonal, the mass matrix of right-handed neutrinos $m_{r}$ is written by $m_{r} = m_{d}^{\rm diag} m^{-1... | chiral perturbative reconstruction of the complex orthogonal matrix $r$ in casas--ibarra parameterization |
for leptogenesis with heavy sterile neutrinos above the electroweak scale, asymmetries produced at early times (in the relativistic regime) are relevant, if they are protected from washout. this can occur for weak washout or when the asymmetry is partly protected by being transferred to spectator fields. we thus study ... | relativistic and spectator effects in leptogenesis with heavy sterile neutrinos |
we investigate baryogenesis via leptogenesis in an a4 flavor model within the paradigm of type-i and ii seesaw mechanism resulting in a magic neutrino mass matrix with broken μ - τ symmetry in a minimal scenario with two right-handed neutrinos (2rhn). additional z3 cyclic symmetry is employed to constrain the yukawa st... | magic neutrino mass model with broken μ - τ symmetry and leptogenesis |
we implement a symmetry violation guideline into a two-higgs-doublet model embedded with three right-handed neutrinos, and exploit the generic yukawa structures of the model via a hypothetical symmetry restoration of a global uq(1) 3×ul(1) 3 symmetry. we then apply a mass-powered parametrization to construct the phenom... | probing new physics signals with symmetry-restored yukawa textures |
in the third fermion family and gauge symmetry of the standard model, we study the quark-quark, lepton-lepton and quark-lepton four-fermion operators in an effective theory at high energies. these operators have nontrivial contributions to the schwinger-dyson equations for fermion self-energy functions and the w±-boson... | vectorlike w± -boson coupling at tev and third family fermion masses |
we construct a b - l model with a 4 × z 3 × z 4 flavor symmetry that accounts for the recent 3 + 1 active-sterile neutrino data. the tiny neutrino mass and the mass hierarchy are obtained by the type-i seesaw mechanism. the hierarchy of the lepton masses is satisfied by a factor of ${v}_{h}{\left(\frac{{v}_{l}}{{\lambd... | b - l model with a 4 × z 3 × z 4 symmetry for 3 + 1 active-sterile neutrino mixing |
we present here a novel and testable mechanism for leptogenesis, which is characterized by a purely thermal generation of lepton asymmetry via scalar decay. guided by the thermal mass matrix diagonalization in the finite-temperature regime, we propose a scenario in which the baryon asymmetry is formulated in terms of t... | baryogenesis from hierarchical dirac neutrinos |
in this paper, we consider a set of new symmetries in the sm: diagonal reflection symmetries $r \, m_{u,\nu}^{*} \, r = m_{u,\nu}, m_{d,e}^{*} = m_{d,e}$ with $r =$ diag $(-1,1,1)$ . these generalized $cp$ symmetries predict the majorana phases to be $\alpha_{2,3} /2 \sim 0$ or $\pi /2$ . realization of diagonal reflec... | diagonal reflection symmetries and universal four-zero texture |
we extend the work of carone, chaurasia and vasquez on nonsupersymmetric models of flavor based on the double tetrahedral group. three issues are addressed: (1) the sector of flavor-symmetry-breaking fields is simplified and their potential studied explicitly, (2) a flavorful axion is introduced to solve the strong c p... | flavor from the double tetrahedral group without supersymmetry: flavorful axions and neutrinos |
we present a five-dimensional (5d) axion-neutrino model that explains the standard model fermion mass hierarchy and flavor structure, while simultaneously generating a high-quality axion. the axion and right-handed neutrinos transform under a 5d peccei-quinn gauge symmetry, and have highly suppressed profiles on the uv... | light sterile neutrinos and a high-quality axion from a holographic peccei-quinn mechanism |
we explore muon anomalous magnetic moment (muon g - 2) in a scotogenic neutrino model with a gauged lepton number symmetry u(1) μ - τ. in this model, a dominant muon g - 2 contribution comes not from an additional gauge sector but from a yukawa sector. in our numerical δχ2 analysis, we show that our model is in favor o... | muon g - 2 in u(1)μ-τ symmetric gauged radiative neutrino mass model |
in the standard model, yukawa couplings parametrize the fermion masses and mixing angles with the exception of neutrino masses. the hierarchies and apparent regularities among the quark and lepton masses are, however, otherwise a mystery. we propose a new class of models having vectorlike fermions that can potentially ... | flavor seesaw mechanism |
we present a new mechanism for generating exponential hierarchies in four-dimensional field theories inspired by anderson localization in one dimension, exploiting an analogy between the localization of electron energy eigenstates along a one-dimensional disordered wire and the localization of mass eigenstates along a ... | exponential hierarchies from anderson localization in theory space |
warped extra dimensions can address both the planck-weak and flavor hierarchies of the standard model (sm). in this paper we discuss the sm neutrino mass generation in a scenario in which a sm singlet bulk fermion—coupled to the higgs and the lepton doublet near the ir brane—is given a majorana mass of order the planck... | warped seesaw mechanism is physically inverted |
in this paper, we study the hierarchy sensitivity of protvino to orca (p2o) experiment in three flavour scenario as well as its sensitivity to non-standard interactions (nsi) in neutrino propagation. because of the largest possible baseline length of 2595 km, p2o is expected to have strong sensitivity towards neutrino ... | optimal configuration of protvino to orca experiment for hierarchy and non-standard interactions |
extensions of the standard model are often highly constrained by cosmology. the presence of new states can dramatically alter observed properties of the universe by the presence of additional matter or entropy. in particular, attempts too solve the hierarchy problem through naturalness invariably predict new particles ... | a portalino to the twin sector |
the first hint of the neutrino mass hierarchy is believed to come from the long-baseline experiment no ν a . recent results from no ν a shows a mild preference towards the c p phase δ13=-9 0 ° and normal hierarchy. fortunately this is the favorable area of the parameter space which does not suffer from the hierarchy-δ1... | study of parameter degeneracy and hierarchy sensitivity of no ν a in presence of sterile neutrino |
we investigate the possibility of viable leptogenesis in an appealing δ(27) model with a universal texture zero in the (1,1) entry. the model accommodates the mass spectrum, mixing and cp phases for both quarks and leptons and allows for grand unification. flavoured boltzmann equations for the lepton asymmetries are so... | leptogenesis in δ(27) with a universal texture zero |
we present an origin of the vacuum expectation values hierarchy in a nonminimal technicolor (tc) framework which is capable of explaining the flavor spectrum of the standard model (sm) along with neutrino masses and mixing, and simultaneously satisfying crucial experimental bounds. the tc scale in this framework can be... | origin of the vevs hierarchy |
δ(54) can serve as a flavor symmetry in particle physics, but remains almost unexplored. we show that in a classification of semi-realistic &z; 3 × &z; 3 heterotic string orbifolds, δ(54) turns out to be the most natural flavor symmetry, providing additional motivation for its study. we revisit its phenomenological pot... | δ(54) flavor phenomenology and strings |
within type-i seesaw mechanism, higgs mass can be dynamically generated via quantum effects of the right handed neutrinos assuming the potential is nearly conformal at the ultra-violet. the scenario, named as the "neutrino option" allows rh neutrino mass scale upto m lesssim 107 gev to be consistent with light neutrino... | non-thermal production of lepton asymmetry and dark matter in minimal seesaw with right handed neutrino induced higgs potential |
the standard model higgs quartic coupling vanishes at (109 - 1013) gev. we study su(2)l× su(2)r× u(1)b-l theories that incorporate the higgs parity mechanism, where this becomes the scale of left-right symmetry breaking, vr. furthermore, these theories solve the strong cp problem and predict three right-handed neutrino... | sterile neutrino dark matter and leptogenesis in left-right higgs parity |
reactor neutrinos have been an important tool for both discovery and precision measurement in the history of neutrino studies. since the first generation of reactor neutrino experiments in the 1950s, the detector technology has advanced greatly. new ideas, new knowledge, and modern software have also enhanced the power... | reactor neutrino experiments: present and future |
the neutrino sector offers one of the most sensitive probes of new physics beyond the standard model of particle physics (sm). the mechanism of neutrino mass generation is still unknown. the observed suppression of neutrino masses hints at a large scale, conceivably of the order of the scale of a rand unified theory (g... | neutrino flavor model building and the origins of flavor and cp violation |
in this paper, we discuss the multi-higgs doublet models, that could be effectively induced by the extended standard model (sm). in particular, we focus on the phenomenology in the supersymmetric model with left-right (lr) symmetry, where the down-type and the up-type yukawa couplings are unified and the yukawa couplin... | flavor physics in the multi-higgs doublet models induced by the left-right symmetry |
we discuss the standard hierarchical vevs model, which predicts the leptonic mixing angles in terms of the cabibbo angle, and masses of strange and charm quarks as $\sin \theta_{12}^\ell \geq 1 - 2 \sin \theta_{12}$, $\sin \theta_{23}^\ell \geq 1 - \sin \theta_{12}$, and $\sin \theta_{13}^\ell \geq \sin \theta_{12} - \... | the standard hvm |
we consider the simplest realization of leptogenesis with one heavy majorana neutrino species much lighter than the other ones. in this scenario, when the temperature of the early universe is smaller than the lightest majorana neutrino mass, we compute at first order in the standard model couplings and, for each coupli... | cp asymmetry in heavy majorana neutrino decays at finite temperature: the hierarchical case |
using the density matrix equations (dme) for high scale leptogenesis based on the type i seesaw mechanism, in which the cp violation (cpv) is provided by the low-energy dirac or/and majorana phases of the neutrino mixing (pmns) matrix, we investigate the 1-to-2 and the 2-to-3 flavour regime transitions, where the 1, 2 ... | aspects of high scale leptogenesis with low-energy leptonic cp violation |
extended scalar and fermion sectors offer new opportunities for generating the observed strong hierarchies in the fermion mass and mixing patterns of the standard model (sm). in this work, we elaborate on the prospects of a particular extension of the inert higgs doublet model where the sm hierarchies are generated seq... | sequentially loop-generated quark and lepton mass hierarchies in an extended inert higgs doublet model |
we present a froggatt-nielsen flavor model that yields a minimal realization of the type-i seesaw mechanism. this seesaw model is minimal for three reasons: (i) it features only two rather than three right-handed sterile neutrinos: n_1 and n_2, which form a pair of pseudo-dirac neutrinos; (ii) the neutrino yukawa matri... | minimal seesaw model with a discrete heavy-neutrino exchange symmetry |
we propose an extension of the standard model introducing large s u (2 )l multiplet fields which are quartet and septet scalars and quintet majorana fermions. these multiplets can induce the neutrino masses via interactions with the s u (2 ) doublet leptons. we then find the neutrino masses are suppressed by a small va... | neutrino mass with large s u (2 )l multiplet fields |
in this work, we derive a quantum information theoretic quantity similar to the leggett-garg inequality, which can be defined in terms of neutrino transition probabilities. for the case of $\nu_\mu \to \nu_e/\bar{\nu}_\mu\to\bar{\nu}_e$ transitions, this quantity is sensitive to cp violating effects as well as the neut... | a quantum information theoretic quantity sensitive to the neutrino mass-hierarchy |
the proposed pingu project (precision icecube next generation upgrade) is expected to collect o (105) atmospheric muon and electron neutrino events in a few years of exposure, and to probe the neutrino mass hierarchy through its imprint on the event spectra in energy and direction. in the presence of non-negligible and... | pingu and the neutrino mass hierarchy: statistical and systematic aspects |
we consider a neutrino mass generating model which employs a scalar leptoquark, δ, and a scalar diquark, s. the new scalars δ and s carry the standard model su(3) c× su(2) l× u(1) yquantum numbers (3 , 1 , -1 /3) and (6 , 1 , -2 /3), respectively. the neutrino masses are generated at the two-loop level, as in the zee-b... | charged lepton flavor violating processes and scalar leptoquark decay branching ratios in the colored zee-babu model |
we present a solution to the strong c p problem in which the imaginary component of the up quark mass, i [mu], acquires a tiny, but nonvanishing value. this is achieved via a dirac seesaw mechanism, which is also responsible for the generation of the small neutrino masses. consistency with the observed value of the up ... | ν solution to the strong c p problem |
there are a lot of works within a class of classically scale invariant model, which is motivated by solving the gauge hierarchy problem. in this context, the higgs mass vanishes at the uv scale due to the classically scale invariance, and is generated via the coleman-weinberg mechanism. since the mass generation should... | gauge coupling unification in a classically scale invariant model |
in this paper, we search for conditions under which the mass matrix of light neutrinos mν is not a result of large cancellations for the type-i seesaw mechanism with four-zero texture. for the yukawa matrix of neutrinos yν and heavy majorana mass matrix mr, these conditions are written as $(y_{\nu })_{i2} \propto (m_{\... | conditions of naturalness and fine-tuning for the type-i seesaw mechanism with four-zero texture |
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 construct a model realizing the inverse seesaw mechanism. the model has two types of gauge singlet fermions in addition to right-handed neutrinos. a required majorana mass scale (kev scale) for generating the light active neutrino mass in the conventional inverse seesaw can be naturally explained by a “seesaw” mecha... | a model realizing inverse seesaw and resonant leptogenesis |
in multi-field reheating after modular j-inflation we investigate the conditions under which baryogenesis via non-thermal leptogenesis can be successfully realized. we introduce three heavy right-handed neutrinos to the non-supersymmetric standard model of particle physics, assuming hierarchical neutrino masses. consid... | baryogenesis via leptogenesis in multi-field inflation |
in the realm of neutrino physics, we grapple with mysteries like the origin of neutrino masses, the absence of a clear mass hierarchy, and the values of majorana phases. to address these puzzles, we extend the standard model using $\delta(27)$ symmetry within the hybrid seesaw framework. we also introduce an additional... | unveiling neutrino mysteries with $\\delta(27)$ symmetry |
the fermion flavor structure is investigated by bilinear decomposition of the mass matrix after ew symmetry breaking, and the roles of factorized matrices in flavor mixing and mass generation are explored. on a new yukawa basis, the minimal parameterization of flavor mixing is realized containing two relative phases an... | the structure of flavor mixing and reconstruction of the mass matrix |
we study the possibility of generating nonzero reactor mixing angle θ13 and baryon asymmetry of the universe within the framework of an a4 flavor symmetric model. using the conventional type i seesaw mechanism we construct the dirac and majorana mass matrices that give rise to the correct light neutrino mass matrix. ke... | common origin of nonzero θ13 and baryon asymmetry of the universe in a tev scale seesaw model with a4 flavor symmetry |
besides the string scale, string theory has no parameter except some quantized flux values, and the string theory landscape is generated by scanning over discrete values of all the flux parameters present. we propose that a typical (normalized) probability distribution p (q ) of a physical quantity q (with non-negative... | string landscape and fermion masses |
in this work we have investigated the phenomenological consequences of two-zero textures of inverse neutrino mass matrix (mν-1) in light of the large mixing angle (lma) and large mixing angle-dark (lma-d) solutions, later of which originates if neutrinos exhibit non-standard interactions with matter. out of fifteen pos... | investigating two-zero textures of inverse neutrino mass matrix under the lamp post of lma and lma-d solutions and symmetry realization |
the long baseline neutrino experiments, t2k and noνa, have taken significant amount of data in each of the four channels: (a) νμ disappearance, (b) ν¯μ disappearance, (c) νe appearance, and (d) ν¯e appearance. there is a mild tension between the disappearance and the appearance data sets of t2k. a more serious tension ... | tensions between the appearance data of t2k and noνa |
in this paper, we perform a detailed analysis of the phenomenology of leptogenesis and dark matter from a low scale seesaw mechanism. in the framework of neutrinophilic two higgs doublet model, we further introduce one scalar singlet ϕ and one dirac fermion singlet χ , which are charged under a z2 symmetry. assuming th... | leptogenesis and dark matter from a low scale seesaw mechanism |
using an s o (10 )-inspired form for the dirac neutrino mass, we map the neutrino data to the right-handed neutrino majorana mass matrix, m , and investigate a special form with seesaw tribimaximal mixing; it predicts a normal hierarchy, and the values of the light neutrino masses. it may be generated by mapping he top... | neutrino masses, the μ -term, and ps l 2(7 ) |
the charged fermion masses of the three generations exhibit the two strong hierarchies m3 ≫m2 ≫m1. we assume that also neutrino masses satisfy mν3 >mν2 >mν1 and derive the consequences of the hierarchical spectra on the fermionic mixing patterns. the quark and lepton mixing matrices are built in a general framewo... | the double mass hierarchy pattern: simultaneously understanding quark and lepton mixing |
extended scalar and fermion sectors offer new opportunities for generating the observed strong hierarchies in the fermion mass and mixing patterns of the standard model (sm). in this work, we elaborate on the prospects of a particular extension of the inert higgs doublet model where the sm hierarchies are generated seq... | sequentially loop-generated quark and lepton mass hierarchies in an extended inert higgs doublet model |
the r-parity violating decays of bino neutralino lsps are analyzed within the context of the b - l mssm "heterotic standard model". these lsps correspond to statistically determined initial soft supersymmetry breaking parameters which, when evolved using the renormalization group equations, lead to an effective theory ... | r-parity violating decays of bino neutralino lsps at the lhc |
in a model of warped extra-dimensions with all matter fields in the bulk, we propose a scenario which explains all the masses and mixings of the sm fermions. in this scenario, the same flavor symmetric structure is imposed on all the fermions of the standard model (sm), including neutrinos. due to the exponential sensi... | unified flavor symmetry from warped dimensions |
a modest extension of the standard model by two additional higgs doublets—the higgs troika model—can provide a well-motivated scenario for successful baryogenesis if neutrinos are dirac fermions. adapting the "spontaneous flavor violation" framework, we consider a version of the troika model where light quarks have sig... | multi-tev signals of baryogenesis in a higgs troika model |
the damping on the fluctuation spectrum and the presence of thermal velocities as properties of warm dark matter particles like sterile neutrinos imprint a distinct signature found from the structure formation mechanisms to the internal structures of halos. using warm dark matter simulations we explore these effects on... | structure formation in warm dark matter cosmologies: top-bottom upside-down |
the appealing feature of inverse seesaw models is that the standard model (sm) neutrino mass emerges from the exchange of tev scale singlets with sizable yukawa couplings, which can be tested at colliders. however, the tiny majorana mass splitting between tev singlets, introduced to accommodate small neutrino masses, i... | hybrid seesaw leptogenesis and tev singlets |
we make a scalar extension of the b-l gauge model where the ${\bf s}_{3}$ non-abelian discrete group drives mainly the yukawa sector. motived by the large and small hierarchies among the quark and active neutrino masses respectively, the quark and lepton families are not treated on the same footing under the assignment... | b-l model with ${\\bf s}_{3}$ symmetry: nearest neighbor interaction textures and broken $\\mu\\leftrightarrow\\tau$ symmetry |
the minimal seesaw scenario can radiatively generate the higgs potential to induce electroweak symmetry breaking while supplying an origin of the higgs vacuum expectation value from an underlying majorana scale. if the higgs potential and (derived) electroweak scale have this origin, the heavy $\rm su(3) \times su(2) \... | the neutrino option |
we propose a systematic and renormalizable sequential loop suppression mechanism to generate the hierarchy of the standard model fermion masses from one discrete symmetry. the discrete symmetry is sequentially softly broken in order to generate one-loop level masses for the bottom, charm, tau and muon leptons and two-l... | sequentially loop suppressed fermion masses from a single discrete symmetry |
in this work, we explore the proposed mechanism in which the gravitational θ anomaly generates neutrino masses. we highlight that the leading renormalizable interactions of the neutrino condensate forbid the possibility of generating hierarchical masses consistent with observation. this conclusion still holds when stan... | exploring the vacuum structure of gravitationally induced neutrino masses |
we propose a next-to-minimal supersymmetric standard model (nmssm) extended by an a4×z3 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 through type i seesaw mechanism while the ... | neutrino phenomenology in the flavored nmssm without domain wall problems |
in this paper, we investigate whether it is possible to determine the neutrino mass hierarchy via a high-statistics and real-time observation of supernova neutrinos with short-time characteristics. the essential idea is to utilize distinct times-of-flight for different neutrino mass eigenstates from a core-collapse sup... | on the possibility to determine neutrino mass hierarchy via supernova neutrinos with short-time characteristics |
we propose a minimal a4 flavor symmetric model, assisted by z2× z3 symmetry, which can naturally takes care of the appropriate lepton mixing and neutrino masses via type-i seesaw. it turns out that the framework, originated due to a specific flavor structure, favors the normal hierarchy of light neutrinos and simultane... | flavored leptogenesis and neutrino mass with a4 symmetry |
motivated by a possible interplay between the mechanism of dynamical symmetry breaking and the seesaw mechanism for generating fermion masses, we present a scale-invariant model that extends the gauge symmetry of the standard model electroweak sector to su(3 ) l⊗ u (1 )x⊗u (1 )n , with a built-in b -l symmetry. the mod... | scale-invariant 3-3-1-1 model with b -l symmetry |
the iron calorimeter (ical) detector at the india-based neutrino observatory (ino) will be used to measure neutrino mass hierarchy. the magnet in the ical detector will be used to distinguish the {\mu^-} and {\mu^+} events induced by {\nu_{\mu}} and {\bar{\nu_{\mu}}}, respectively. due to the importance of the magnet i... | simulation studies for electromagnetic design of ino ical magnet and its response to muons |
we study the geometric phase for neutrinos at various man-made facilities, such as the reactor and accelerator neutrino experiments. the analysis is done for the three flavor neutrino scenario, in the presence of matter and for general, noncyclic paths. the geometric phase is seen to be sensitive to the cp violating ph... | geometric phase and neutrino mass hierarchy problem |
the clockwork mechanism provides a natural way to obtain hierarchical masses and couplings in a theory. we propose a clockwork model that has nine clockwork generations. in this model, the candidates of the origin of the neutrino mixings are nine yukawa mass matrix elements yaβ that connect neutrinos and clockwork ferm... | clockwork origin of neutrino mixings |
every second greater than 1025 antineutrinos radiate to space from earth, shining like a faint antineutrino star. underground antineutrino detectors have revealed the rapidly decaying fission products inside nuclear reactors, verified the long-lived radioactivity inside our planet, and informed sensitive experiments fo... | agm2015: antineutrino global map 2015 |
we perform a comprehensive analysis of several phenomenological aspects of the renormalizable extension of the inert 3-3-1 model with sequentially loop-generated standard model fermion mass hierarchy. special attention is paid to the study of the constraints arising from the experimental data on the ρ parameter, as wel... | some phenomenological aspects of the 3-3-1 model with the cárcamo-kovalenko-schmidt mechanism |
we study s4 flavor symmetric inverse seesaw model which has the possibility of simultaneously addressing neutrino phenomenology, dark matter (dm) and baryon asymmetry of the universe (bau) through leptogenesis. the model is the extension of the standard model by the addition of two (rh) neutrinos and three sterile ferm... | neutrino mass, leptogenesis and sterile neutrino dark matter in inverse seesaw framework |
the relation between quark masses and ckm mixing is studied based on an approximate chiral $so(2)_{l}\times so(2)_{r}$ ?> flavor symmetry of quark mass matrix. in mass hierarchy limit, the mass ratio effect on ckm mixing is suppressed, which separates mass hierarchy and quark flavor mixing into two independent probl... | ckm and pmns mixing matrixes from so(2) flavor symmetry |
we present a systematic study of leptogenesis in neutrino mass models with μτ-flavoured cp symmetry. in addition to the strong hierarchical n1-dominated scenario (n1ds) in the `two flavour regime' of leptogenesis, we show that one may choose the right-handed (rh) neutrino mass hierarchy as mild as m2 ≃ 4.7m1 for a perf... | flavoured leptogenesis and cpμτ symmetry |
the extensions of the standard model based on the su(3)c × su(3)l × u(1)x gauge group (331-models) have been advocated to explain the number of fermion families in nature. it has been recently shown that the froggatt-nielsen mechanism, a popular way to explain the mass hierarchy of the charged fermions, can be incorpor... | natural neutrino sector in a 331-model with froggatt-nielsen mechanism |
the standard model of particle physics (sm) is presently the best description of nature at small distances and high energies. however, with tiny but nonzero neutrino masses, a higgs boson mass unstable under radiative corrections, and little guidance on understanding the hierarchy of fermion masses, the sm remains an u... | hadron collider tests of neutrino mass-generating mechanisms |
we investigate scaling ansatz with texture zeros within the framework of linear seesaw mechanism. in this variant of seesaw mechanism a simplified expression of effective neutrino mass matrix mν containing two dirac type matrices (md and mds) and one majorana type matrix (mrs) is obtained by virtue of neglecting the gl... | scaling ansatz with texture zeros in linear seesaw |
we present simple and predictive realizations of neutrino masses in theories based on the s u (6 ) grand unifying group. at the level of the lowest-dimension operators, this class of models predicts a skew-symmetric flavor structure for the dirac mass term of the neutrinos. in the case that neutrinos are dirac particle... | predictive dirac and majorana neutrino mass textures from s u (6 ) grand unified theories |
in this study, a gauge b − l model with δ(27) × z4 symmetry is suggested to explain the fermion masses, mixings and hierarchies. we show that the yukawa couplings in the lepton and quark sectors reach a range only about two orders of magnitude. the smallness of the light neutrino masses, fermion masses and mixings is o... | fermion mass hierarchies and mixings in b − l model with δ(27) × z4 symmetry |
we have investigated the phenomenological implications of texture one-zero neutrino mass matrix under the lamp post of the latest data on neutrino mass and mixings. in particular, we have obtained the predictions of the model for, yet unknown observables like neutrino mass hierarchy, 𝜃23-octant and cp violation. out o... | ramifications of texture one-zero neutrino mass model in coherence with the latest neutrino data |
we discuss the higgs mass and cosmological constant hierarchy puzzles with emphasis on the interplay of poincaré invariance, mass generation and renormalization group invariance. a plausible explanation involves an emergent standard model with the cosmological constant scale suppressed by power of the large scale of em... | vacuum energy with mass generation and higgs bosons |
a study on the use of a machine learning algorithm for the level 1 trigger decision in the juno experiment ispresented. juno is a medium baseline neutrino experiment in construction in china, with the main goal of determining the neutrino mass hierarchy. a large liquid scintillator (ls)volume will detect the electron a... | study of using machine learning for level 1 trigger decision in juno experiment |
in this contribution to the snowmass 2021 process, we outline models with two or three higgs doublets that address open questions of particle physics and cosmology. in particular, we show that with two additional higgs doublets one can provide a mechanism for the generation of lepton asymmetry and hence baryon asymmetr... | good things to do with extra higgs doublets |
we provide a complete answer to the following question: what are the flavour groups and representations providing, in the symmetric limit, an approximate description of lepton masses and mixings? we assume that neutrino masses are described by the weinberg operator. we show that the pattern of lepton masses and mixings... | can an unbroken flavour symmetry provide an approximate description of lepton masses and mixing? |
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