期刊文献+
共找到53篇文章
< 1 2 3 >
每页显示 20 50 100
Standard Model Fermion Masses and Charges from Holographic Analysis
1
作者 T. R. Mongan 《Journal of Modern Physics》 2024年第6期796-803,共8页
The Standard Model of particle physics involves twelve fundamental fermions, treated as point particles, in four charge states. However, the Standard Model does not explain why only three fermions are in each charge s... The Standard Model of particle physics involves twelve fundamental fermions, treated as point particles, in four charge states. However, the Standard Model does not explain why only three fermions are in each charge state or account for neutrino mass. This holographic analysis treats charged Standard Model fermions as spheres with mass 0.187 g/cm<sup>2</sup> times their surface area, using the proportionality constant in the holographic relation between mass of the observable universe and event horizon radius. The analysis requires three Standard Model fermions per charge state and relates up quark and down quark masses to electron mass. Holographic analysis specifies electron mass, to six significant figures, in terms of fundamental constants α,ℏ,G,Λ and Ω Λ . Treating neutrinos as spheres and equating electron neutrino energy density with cosmic vacuum energy density predicts neutrino masses consistent with experiment. 展开更多
关键词 Electron Mass Up Quark Mass Down Quark Mass Neutrino masses
下载PDF
Dirac Neutrino Masses in NCG
2
作者 LIChang-Hui DINGHao-Gang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2001年第4期441-446,共6页
Several models in noncommutative geometry (NCG) with mild changes to the standard model are introduced to discuss the neutrino mass problem. We use two constraints, Poincaré duality and gauge anomaly free, to dis... Several models in noncommutative geometry (NCG) with mild changes to the standard model are introduced to discuss the neutrino mass problem. We use two constraints, Poincaré duality and gauge anomaly free, to discuss the possibility of containing right-handed neutrinos in them. Our work shows that no model in this paper, with each generation containing a right-handed neutrino, can satisfy these two constraints at the same time. So, to consist with neutrino oscillation experiment results, maybe fundamental changes to the present version of NCG are usually needed to include Dirac massive neutrinos. 展开更多
关键词 neutrino mass noncommutative geometry
下载PDF
Characterizations That Help Explain Particle and Cosmic Data
3
作者 Thomas Joel Buckholtz 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2024年第3期1304-1357,共54页
This paper suggests explanations for otherwise seemingly unexplained data about elementary particles and cosmology. The explanations have bases in coordinate-based modeling and in integer-based characterizations for s... This paper suggests explanations for otherwise seemingly unexplained data about elementary particles and cosmology. The explanations have bases in coordinate-based modeling and in integer-based characterizations for some catalogs. One catalog features properties—including charge, mass, and angular momentum—of objects. Another catalog features all known and some possible elementary particles. Assumptions include that multipole-expansion mathematics has uses regarding long-range interactions, such as gravity, and that nature includes six isomers of all elementary particles other than long-range-interaction bosons. One isomer associates with ordinary matter. Five isomers are associated with dark matter. Multipole notions help explain large-scale aspects such as the rate of expansion of the universe. 展开更多
关键词 Elementary Particles Dark Matter Rate of Expansion of the Universe Galaxy Formation Neutrino masses Vacuum Energy Dark Energy Quantum Gravity
下载PDF
Neutrinos Described as Vacuum Energy Excitations Predict Observed Neutrino Mass Sum
4
作者 T. R. Mongan 《Journal of Modern Physics》 2024年第12期1999-2006,共8页
Reliable observations find only three neutrino mass eigenstates, oscillating between each other as neutrinos travel through space, and limit the sum of the three neutrino masses. At a minimum, any reliable description... Reliable observations find only three neutrino mass eigenstates, oscillating between each other as neutrinos travel through space, and limit the sum of the three neutrino masses. At a minimum, any reliable description of neutrinos must allow only three neutrino mass eigenstates and predict a neutrino mass sum consistent with observations. This paper describes neutrinos as spheres, with radius one quarter of their Compton wavelength and thickness of the Planck length, surrounding a central core along their rotation axis, with diameter of the Planck length. This description of neutrinos as excitations of the vacuum energy allows only three neutrino mass eigenstates and predicts a neutrino mass sum consistent with observations. 展开更多
关键词 Neutrino Mass Sum Prediction Electron Neutrino Mass from Vacuum Energy Density
下载PDF
Determining the Neutrino Mass Eigenstates and the Effective Majorana Mass 被引量:1
5
作者 Zoran B. Todorovic 《Journal of High Energy Physics, Gravitation and Cosmology》 CAS 2022年第3期593-622,共30页
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), th... 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 presented in this paper, we have shown that the precise definition of the mass splittings between neutrino mass eigenstates, done in the latest analysis of experimental data, can be of crucial importance for defining the nature of neutrino mass hierarchy. The Standard Model has three generations of fundamental matter particles. Three generations of the charged lepton mass show a hierarchical structure: m<sub>τ</sub> > m<sub>μ</sub> > m<sub>e</sub>. Owing to that, there is a belief and it is considered that neutrinos may follow such hierarchical structure. In our calculations, we have also included the latest data obtained, based on the processing of measurement results, which showed that even with such data, obtained results favor the normal neutrino mass hierarchy. As for the individual neutrino mass calculated in this paper, in today’s neutrino physics it is only known that neutrino mass scale is bounded only from above, and both the Dirac and the Majorana character of neutrinos are compatible with all observations. Among some of the questions resolved in this paper, which are related to the properties of neutrinos, a positive answer was also given to the question of whether light neutrinos are self-conjugate particles or not. 展开更多
关键词 Special Relativity LEPTONS Ordinary Neutrino Neutrino Mass and Mixing PMNS Matrix Jarlskog Invariant Majorana Mass
下载PDF
Constraining Neutrino Mass in Dynamical Dark Energy Cosmologies with the Logarithm Parametrization and the Oscillating Parametrization 被引量:2
6
作者 Tian-Ying Yao Rui-Yun Guo Xin-Yue Zhao 《Journal of High Energy Physics, Gravitation and Cosmology》 2023年第4期1044-1061,共18页
We constrain two dynamical dark energy models that are parametrized by the logarithm form of and the oscillating form of . Comparing with the Chevallier-Polarski-Linder (CPL) model, the two parametrizations for dark e... We constrain two dynamical dark energy models that are parametrized by the logarithm form of and the oscillating form of . Comparing with the Chevallier-Polarski-Linder (CPL) model, the two parametrizations for dark energy can explore the whole evolution history of the universe properly. Using the current mainstream observational data including the cosmic microwave background data and the baryon acoustic oscillation data as well as the type Ia supernovae data, we perform the X<sup>2</sup> statistic analysis to global fit these models, finding that the logarithm parametrization and the oscillating parameterization are almost as well as the CPL scenario in fitting these data. We make a comparison for the impacts of the dynamical dark energy on the cosmological constraints on the total mass of active neutrinos. We find that the logarithm parametrization and the oscillating parameterization can increase the fitting values of Σm<sub>v</sub>. Looser constraints on Σm<sub>v</sub> are obtained in the logarithm and oscillating models than those derived in the CPL model. Consideration of the possible mass ordering of neutrinos reveals that the most stringent constraint on Σm<sub>v</sub> appears in the degenerate hierarchy case. 展开更多
关键词 Dynamical Dark Energy Neutrino Mass Observational Constraints
下载PDF
Neutrino Mass Generation in SO(4) Model
7
作者 Indranath Bhattacharyya 《Communications in Theoretical Physics》 SCIE CAS CSCD 2010年第8期305-307,共3页
Generation of neutrino mass in SO(4) model is proposed here. The algebraic structure of SO (4) is same as to that ofSU(2)L x SU(2)R. It is shown that the spontaneous symmetry breaking results three massive as ... Generation of neutrino mass in SO(4) model is proposed here. The algebraic structure of SO (4) is same as to that ofSU(2)L x SU(2)R. It is shown that the spontaneous symmetry breaking results three massive as well as three massless gauge bosons. The standard model theory according to which there exist three massive gauge bosons and a massless one is emerged from this model. In the framework ofSU(2)L x SU(2)R a small Dirac neutrino mass is derived. It is also shown that such mass term may vanish with a special choice. The Majorana mass term is not considered here and thus in this model the neutrino mass does not follow seesaw structure. 展开更多
关键词 left right symmetry S0(4) modei extension of electroweak gauge sectors neutrino mass generation Dirac neutrino mass
下载PDF
Phenomenology of Friedberg-Lee Texture in Left-Right Symmetric Model
8
作者 LUO Min-Jie LIU Qiu-Yu 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第8期451-458,共8页
We consider that the Higgs triplet Yukawa coupling takes the Friedberg-Lee texture, and the Higgs doublet Yukawa coupling simply identifies with the diagonal Yutawa coupling of charged lepton in the context of left-ri... We consider that the Higgs triplet Yukawa coupling takes the Friedberg-Lee texture, and the Higgs doublet Yukawa coupling simply identifies with the diagonal Yutawa coupling of charged lepton in the context of left-right symmetric model. In this scenario, the phenomenology, including effective neutrino masses, mixings, and thermal flavor-dependent leptogenesis and lepton flavor violation decays are studied. We investigate the combined constrain of the parameters in this scenario and test its consistency with present data. 展开更多
关键词 neutrino mass neutrino mixing flavor-dependent leptogenesis lepton flavor violation Friedberg-Lee texture
下载PDF
Bi-large Neutrino Mixing See-Saw Mass Matrix with Texture Zeros and Leptogenesis
9
作者 CHAO Wei HE Xiao-Gang LI Xue-Qian 《Communications in Theoretical Physics》 SCIE CAS CSCD 2006年第6期1073-1084,共12页
We study constraints on neutrino properties for a class of bi-large mixing See-Saw mass matrices with texture zeros and with the related Dirac neutrino mass matrix to be proportional to a diagonal matrix of the form d... We study constraints on neutrino properties for a class of bi-large mixing See-Saw mass matrices with texture zeros and with the related Dirac neutrino mass matrix to be proportional to a diagonal matrix of the form diag (e, 1, 1). Texture zeros may occur in the light (class a)) or in the heavy (class b)) neutrino mass matrices. Each of these two classes has 5 different forms which can produce non-trivial three generation mixing with at least one texture zero. We tind that two types of texture zero mass matrices in both class a and class b can be consistent with present data on neutrino masses and mixing. None of the neutrinos can have zero masses and the lightest of the light neutrinos has a mass larger than about 0.046 eV for class a and 0.0027 eV for class b. In these models although the CK.M CP violating phase vanishes, the non-zero Majorana phases can exist and can play an important role in producing the observed baryon asymmetry in our universe through leptogenesis mechanism. The requirement of producing the observed baryon asymmetry can further distinguish different models and also restrict the See-Saw scale to be in the range of 10^12- 10^15 GeV. We also discuss RG effects on V^13. 展开更多
关键词 NEUTRINO neutrino mass matrix neutrino masses and mixing bi-large mixing matrix
下载PDF
Quantum Mechanics and General Relativity Identify Standard Model Particles as Black Holes 被引量:1
10
作者 T. R. Mongan 《Journal of Modern Physics》 2022年第6期992-1000,共9页
The Standard Model of particle physics does not account for charged fermion mass values and neutrino mass, or explain why only three particles are in each charge state 0, -e/3, 2e/3, and -e. These issues are addressed... The Standard Model of particle physics does not account for charged fermion mass values and neutrino mass, or explain why only three particles are in each charge state 0, -e/3, 2e/3, and -e. These issues are addressed by treating Standard Model particles with mass m as spheres with diameter equal to their Compton wavelength l =&#295;/mc, where &#295;is Planck’s constant and c the speed of light, and any charge in diametrically opposed pairs ±ne/6 with n = 1, 2, or 3 at the axis of rotation on the sphere surface. Particles are ground state solutions of quantized Friedmann equations from general relativity, with differing internal gravitational constants. Energy distribution within particles identifies Standard Model particles with spheres containing central black holes with mass m, and particle spin resulting from black hole angular momentum. In each charge state, energy distribution within particles satisfies a cubic equation in l, allowing only three particles in the charge state and requiring neutrino mass. Cosmic vacuum energy density is a lower limit on energy density of systems in the universe, and setting electron neutrino average energy density equal to cosmic vacuum energy density predicts neutrino masses consistent with experiment. Relations between charged fermion wavelength solutions to cubic equations in different charge states determine charged fermion masses relative to electron mass as a consequence of charge neutrality of the universe. An appendix shows assigning charge ±e/6 to bits of information on the event horizon available for holographic description of physics in the observable universe accounts for dominance of matter over anti-matter. The analysis explains why only three Standard Models are in each charge state and predicts neutrino masses based on cosmic vacuum energy density as a lower bound on neutrino energy density. 展开更多
关键词 Standard Model Particles Black Holes From Internal Gravity Neutrino Mass Prediction
下载PDF
A PHOTOEMISSIVE MONOENERGETIC ELECTRON SOURCE FOR CALIBRATING THE BETA-MAGNETIC SPECTROMETER
11
作者 陈志才 孙汉城 冒亚军 《Nuclear Science and Techniques》 SCIE CAS CSCD 1994年第2期100-108,共9页
A new kind of electron source, the photoemissive monoenergetic electron source has been invented for calibrating the beta--magnetic spectrometer. It produceselectrons in the form of simulating a radioactive monoenerge... A new kind of electron source, the photoemissive monoenergetic electron source has been invented for calibrating the beta--magnetic spectrometer. It produceselectrons in the form of simulating a radioactive monoenergetic electron source andcan be made in any shape and size according tO the demands of experimentS. In thispaper, the principles and basic constructions of the photoemissive monoenergeticelectron source are described, the resultS of calibrating our 2’l’x bead--magneticspectrometer with a single strip arc shaped photoemissive monoenergetic electronsource are listed, a new way for determining resolution function of experimentslsystem in the research of neutrino rest mass has been posed and one of its actualapplications is also given. 展开更多
关键词 PHOTOEMISSION Monoenergetic electron sources Beta-magneticspectrometer Resolution function Neutrino rest mass
下载PDF
Interference phase of mass neutrino in CM space-time
12
作者 陈霞 王永久 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第4期1707-1710,共4页
In the gravitational field of central mass with electric and magnetic charges and magnetic moment (CM spacetime), this paper calculates the interference phase of mass neutrino along geodesic in the radial direction,... In the gravitational field of central mass with electric and magnetic charges and magnetic moment (CM spacetime), this paper calculates the interference phase of mass neutrino along geodesic in the radial direction, and discusses the contribution of the electric and magnetic charges and magnetic moment of the central mass to the phase. 展开更多
关键词 interference phase CM space-time mass neutrino
下载PDF
Mass neutrino oscillations in Robertson-Walker space-time
13
作者 黄秀菊 李泽军 王永久 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第1期229-231,共3页
Along the geodesic we calculate the interference phase of the mass neutrinos propagating in the radial direction in Robertson-Walker space-time. Since our universe is expanding, the phase factor Ф is increasing under... Along the geodesic we calculate the interference phase of the mass neutrinos propagating in the radial direction in Robertson-Walker space-time. Since our universe is expanding, the phase factor Ф is increasing under the condition of the same proper physical distance l. Different values of curvature parameter k in Robertson Walker metric represent different cosmological models, correspondingly, we obtain the different interference phases. 展开更多
关键词 interference phase mass neutrino Robertson-Walker space-time
下载PDF
Interference phase of mass neutrino in Reissner-Nordstrm-de Sitter space-time
14
作者 黄河 王永久 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第9期664-667,共4页
In Reissner-NordstrSm-de Sitter space-time, we calculate the interference phase of mass neutrino along geodesic in the radial direction, and then investigate the effects of the cosmological constant A on the phase. Mo... In Reissner-NordstrSm-de Sitter space-time, we calculate the interference phase of mass neutrino along geodesic in the radial direction, and then investigate the effects of the cosmological constant A on the phase. Morever, the expression of the interference phase can be reduced to that in Reissner-Nordstrom space-time when A approaches to zero. 展开更多
关键词 interference phase Reissner NordstrSm de Sitter space-time mass neutrino
下载PDF
Rotating Lepton Model of Pions and Kaons: Mechanics at fm Distances
15
作者 Constantinos G. Vayenas Dionysios Tsousis +2 位作者 Dimitrios Grigoriou Konstantinos Parisis Elias C. Aifantis 《Journal of Applied Mathematics and Physics》 2022年第9期2805-2819,共15页
The present article is a continuation of a recently published paper [1] in which we have modeled the composition and structure of neutrons and other hadrons using the Rotating Lepton Model (RLM) which is a Bohr type m... The present article is a continuation of a recently published paper [1] in which we have modeled the composition and structure of neutrons and other hadrons using the Rotating Lepton Model (RLM) which is a Bohr type model employing the relativistic gravitational attraction between three ultrafast rotating neutrinos as the centripetal force. The RLM accounts for special relativity and also for the De Broglie equation of quantum mechanics. In this way this force was shown to reach the value of the Strong Force while the values of the masses of the rotating relativistic neutrinos reach those of quarks. Masses computed for twelve hadrons and bosons are in very close (~2%) agreement with the experimental values. Here we use the same RLM approach to describe the composition and structure and to compute the masses of Pions and Kaons which are important zero spin mesons. Contrary to hadrons and bosons which have been found via the RLM to comprise the heaviest neutrino eigenmass m<sub>3</sub>, in the case of mesons the intermediate neutrino mass eigenstate m<sub>2</sub> is found to play the dominant role. This can explain why the lowest masses of mesons are generally smaller than those of hadrons and bosons. Thus in the case of Pions it is found that they comprise three rotating m<sub>2</sub> mass eigenstate neutrinos and the computed mass of 136.6 MeV/c<sup>2</sup> is in good agreement with the experimental value of 134.977 MeV/c<sup>2</sup>. The Kaon structure is found to consist of six m<sub>2</sub> mass eigenstate neutrinos arranged in two parallel pion-type rotating triads. The computed Kaon mass differs less that 2% from the experimental K<sup>±</sup> and K&#176;values of 493.677 MeV/c<sup>2</sup> and 497.648 MeV/c<sup>2</sup> respectively. This, in conjunction with the experimentally observed decay products of the Kaons, provides strong support for the proposed K structure. 展开更多
关键词 Pions and Kaons-Structure and masses Gravitational Bohr-de Broglie-Newton-Einstein Type Models Rotating Lepton Model (RLM) HADRONIZATION Neutrino masses Special Relativity Gravitational Force Quantum Mechanics
下载PDF
Confining Potential and Mass of Elementary Particles
16
作者 Lev I. Buravov 《Journal of Modern Physics》 2016年第1期129-133,共5页
In this paper we consider a model in which the masses of elementary particles are formed and stabilized thanks to confining potential, which is caused by recoil momentum at emission of specific virtual bosons by parti... In this paper we consider a model in which the masses of elementary particles are formed and stabilized thanks to confining potential, which is caused by recoil momentum at emission of specific virtual bosons by particle itself. The calculation of this confining potential Ф(R) is carried out. It is shown that Ф(R) may be in the form const or const depending on continuous or discrete nature of the spectrum of emitted bosons. 展开更多
关键词 Confining Potential Origin of Mass of Particle Stabilizing of Particle Mass Virtual Bosons Spherical Bosonic Wave Origin of Neutrino masses Neutrino Mass Formula Calculation of Neutrino masses
下载PDF
Prospects for weighing neutrinos in interacting dark energy models using joint observations of gravitational waves andγ-ray bursts
17
作者 Lu Feng Tao Han +1 位作者 Jing-Fei Zhang Xin Zhang 《Chinese Physics C》 SCIE CAS CSCD 2024年第9期225-233,共9页
Cosmological observations can be used to weigh neutrinos,but this method is model-dependent,with results relying on the cosmological model considered.If we consider interactions between dark energy and dark matter,the... Cosmological observations can be used to weigh neutrinos,but this method is model-dependent,with results relying on the cosmological model considered.If we consider interactions between dark energy and dark matter,the neutrino mass constraints differ from those derived under the standard model.On the contrary,gravitational wave(GW)standard siren observations can measure absolute cosmological distances,helping to break parameter degeneracies inherent in traditional cosmological observations,thereby improving constraints on neutrino mass.This paper examines the constraints on neutrino mass within interacting dark energy(IDE)models and explores how future GW standard siren observations could enhance these results.For multi-messenger GW observations,we consider the joint observations of binary neutron star mergers by third-generation ground-based GW detectors and shortγ-ray burst observations by missions similar to the THESEUS satellite project.Using current cosmological observations(CMB+BAO+SN),we obtain an upper limit on the neutrino mass in the IDE models of 0.15(or 0.16)eV.With the inclusion of GW data,the upper limit on the neutrino mass improves to 0.14 eV.This indicates that in the context of IDE models,the improvement in neutrino mass constraints from GW observations is relatively limited.However,GW observations significantly enhance the constraints on other cosmological parameters,such as matter density parameter,the Hubble constant,and coupling strength between dark energy and dark matter. 展开更多
关键词 interacting dark energy neutrino mass gravitational wave standard siren COSMOLOGY
原文传递
Constraints on active and sterile neutrinos in an interacting dark energy cosmology 被引量:1
18
作者 Lu Feng Dong-Ze He +2 位作者 Hai-Li Li Jing-Fei Zhang Xin Zhang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2020年第9期16-29,共14页
We investigate the impacts of dark energy on constraining massive(active/sterile)neutrinos in interacting dark energy(IDE)models by using the current observations.We employ two typical IDE models,the interacting w col... We investigate the impacts of dark energy on constraining massive(active/sterile)neutrinos in interacting dark energy(IDE)models by using the current observations.We employ two typical IDE models,the interacting w cold dark matter(IwCDM)model and the interacting holographic dark energy(IHDE)model,to make an analysis.To avoid large-scale instability,we use the parameterized post-Friedmann approach to calculate the cosmological perturbations in the IDE models.The cosmological observational data used in this work include the Planck cosmic microwave background(CMB)anisotropies data,the baryon acoustic oscillation data,the type Ia supernovae data,the direct measurement of the Hubble constant,the weak lensing data,the redshift-space distortion data,and the CMB lensing data.We find that the dark energy properties could influence the constraint limits of active neutrino mass and sterile neutrino parameters in the IDE models.We also find that the dark energy properties could influence the constraints on the coupling strength parameterβ,and a positive coupling constant,β>0,can be detected at the 2.5σstatistical significance for the IHDE+νs model by using the all-data combination.In addition,we also discuss the"Hubble tension"issue in these scenarios.We find that the H0 tension can be effectively relieved by considering massive sterile neutrinos,and in particular in the IHDE+νsmodel the H0 tension can be reduced to be at the 1.28σlevel. 展开更多
关键词 interacting dark energy neutrino mass active neutrinos sterile neutrinos Hubble tension
原文传递
Forecast for weighing neutrinos in cosmology with SKA 被引量:1
19
作者 Jing-Fei Zhang Bo Wang Xin Zhang 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2020年第8期53-60,共8页
We investigate what role the SKA neutral hydrogen(HI)intensity mapping(IM)and galaxy sky surveys will play in weighing neutrinos in cosmology.We use the simulated data of the baryon acoustic oscillation(BAO)measuremen... We investigate what role the SKA neutral hydrogen(HI)intensity mapping(IM)and galaxy sky surveys will play in weighing neutrinos in cosmology.We use the simulated data of the baryon acoustic oscillation(BAO)measurements from the HI surveys based on SKA1(IM)and SKA2(galaxy)to do the analysis.For the current observations,we use the Planck 2015 cosmic microwave background(CMB)anisotropies observation,the optical BAO measurements,the type Ia supernovae(SN)observation(Pantheon compilation),and the latest H0 measurement.We consider three mass ordering cases for massive neutrinos,i.e.,the normal hierarchy(NH),inverted hierarchy(IH),and degenerate hierarchy(DH)cases.It is found that the SKA observation can significantly improve the constraints on?m and H0.Compared to the current observation,the SKA1 data can improve the constraints on?m by about 33%,and on H0 by about 36%;the SKA2 data can improve the constraints on?m by about 58%,and on H0 by about 66%.It is also found that the SKA observation can only slightly improve the constraints on∑mν.Compared to the current observation,the SKA1 data can improve the constraints on∑mνby about 4%,3%,and 10%,for the NH,IH,and DH cases,respectively;the SKA2 data can improve the constraints on∑mνby about 7%,7%,and 16%,for the NH,IH,and DH cases,respectively. 展开更多
关键词 21 cm observation intensity mapping survey Square Kilometre Array baryon acoustic oscillations neutrino mass
原文传递
Multiscalar B-L extension based on S_(4)flavor symmetry for neutrino masses and mixing 被引量:1
20
作者 V.V.Vien H.N.Long 《Chinese Physics C》 SCIE CAS CSCD 2021年第4期181-191,共11页
A multiscalar and nonrenormalizable B-L extension of the standard model(SM)with S_(4)symmetry which successfully explains the recently observed neutrino oscillation data is proposed.The tiny neutrino masses and their ... A multiscalar and nonrenormalizable B-L extension of the standard model(SM)with S_(4)symmetry which successfully explains the recently observed neutrino oscillation data is proposed.The tiny neutrino masses and their hierarchies are generated via the type-I seesaw mechanism.The model reproduces the recent experiments of neutrino mixing angles and Dirac CP violating phase in which the atmospheric angle(θ_(23))and the reactor angle(θ_(13))get the best-fit values while the solar angle(θ_(12))and Dirac CP violating phase(δ)are in 3σrange of the best-fit value for the normal hierarchy(NH).For the inverted hierarchy(IH),θ13 gets the best-ft value andθ_(23)together withδare in the lσrange,whileθ12 is in 3δrange of the best-fit value.The effective neutrino masses are pre-dicted to be(m_(ee))=6.81 meV for the NH and(m_(ee))=48.48 meV for the IH,in good agreement with the most re-cent experimental data. 展开更多
关键词 neutrino mass and mixing extensions of electroweak Higgs sector flavor symmetries
原文传递
上一页 1 2 3 下一页 到第
使用帮助 返回顶部