Active Dirac neutrinos via SU(2) L doublets in 5d

Fujimoto, Yukihiro; Hasegawa, K.; Nagasawa, Tomoaki; Nishiwaki, Kenji; Sakamoto, Makoto; Tatsumi, Kentaro

doi:10.1007/jhep06(2016)178

Cited by 7 publications

(6 citation statements)

References 104 publications

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“…The results are in great agreement with experimental values [9,10] and for the mass of the Z boson M Z = 91.1876(21) GeV, when Q = M Z we obtain the value:…”

Section: Running Of the Fine Structure Constant And The Yukawa Couplingsupporting

confidence: 90%

Supersymmetry is Not Dead

Perkovic¹

2018

Preprint

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After the recent runs of the Large Hadron Collider failed to find any trace of sparticles predicted by the MSSM, the plurality of scientists went as far as to proclaim Supersymmetry dead. This paper will give strong arguments, all of which are supported by experimental evidence, to the contrary. The problem that led to the failure to detect the sought after sparticles in the LHC probes of new physics beyond the Standard Model was in the low 1 TeV energy scale of the spontaneous Supersymmetry breaking and this paper will present a formula that sets the scale above 10 TeV and bellow 100 TeV. The formula in question unites the running values of the fine structure constant, the strong coupling constant and the electron Yukawa coupling. The results obtained for the fine structure constant when the Q scale equals the Z boson mass is in full agreement with the experimental results as is the world average for the strong coupling constant as well. The predictions of the formula for the running of the strong coupling constant are also in great agreement with experimental result on all measured values of Q, including the most recent CMS collaboration measurements that used the double-differential inclusive jet cross section as a function of the jet transverse momentum and the absolute jet rapidity where they collected the data from LHC pp collisions at 8 TeV. The formula will also eliminate the problem of infinities in calculations of the running of the fine structure constant, known as the Landau Pole, and it will set the mass of the observable universe as the natural UV cutoff.

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“…The results are in great agreement with experimental values [9,10] and for the mass of the Z boson M Z = 91.1876(21) GeV, when Q = M Z we obtain the value:…”

Section: Running Of the Fine Structure Constant And The Yukawa Couplingsupporting

confidence: 90%

Supersymmetry is Not Dead

Perkovic¹

2018

Preprint

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“…Finally, we reemphasize that it is quite difficult to understand why the Yukawa couplings of Dirac neutrinos are six orders of magnitude smaller than those of charged leptons, if they acquire their masses in the same way as in the SM. In this regard it has been shown that a relatively natural generation of tiny Dirac neutrino masses is not impossible in some models involving extra spacial dimensions [435,793,794,795,796], supersymmetry or stringy symmetries [199,797,798,799,800], radiative mechanisms [801,802,803,804,805] or some flavor symmetries [806,807,808,809,810,811,812,813]. That is why some attention has been paid to massive Dirac neutrinos and their phenomenological consequences.…”

Section: Model Building Based On a 4 Flavor Symmetrymentioning

confidence: 99%

Flavor structures of charged fermions and massive neutrinos

Xing

2019

Preprint

116

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Most of the free parameters in the Standard Model (SM) -a quantum field theory which has successfully elucidated the behaviors of strong, weak and electromagnetic interactions of all the known fundamental particles, come from the lepton and quark flavors. The discovery of neutrino oscillations has proved that the SM is incomplete, at least in its lepton sector; and thus the door of opportunity is opened to exploring new physics beyond the SM and solving a number of flavor puzzles. In this review article we give an overview of important progress made in understanding the mass spectra, flavor mixing patterns, CP-violating effects and underlying flavor structures of charged leptons, neutrinos and quarks in the past twenty years. After introducing the standard pictures of fermion mass generation, flavor mixing and CP violation in the SM extended with the presence of massive Dirac or Majorana neutrinos, we briefly summarize current experimental knowledge about the flavor parameters of quarks and leptons. Various ways of describing flavor mixing and CP violation are discussed, the renormalization-group evolution of flavor parameters is illuminated, and the matter effects on neutrino oscillations are interpreted. Taking account of possible extra neutrino species, we propose a standard parametrization of the 6 × 6 flavor mixing matrix and comment on the phenomenological aspects of heavy, keV-scale and light sterile neutrinos. We pay particular attention to those novel and essentially model-independent ideas or approaches regarding how to determine the Yukawa textures of Dirac fermions and the effective mass matrix of Majorana neutrinos, including simple discrete and continuous flavor symmetries. An outlook to the future development in unravelling the mysteries of flavor structures is also given.

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“…It would, however, be of great interest to embed our setups into superstring theories. Although it is known that U (N ) gauge groups are hard to be obtained in 10D type II string theory with D-branes, our results will be still useful because some properties with respect to zero-mode wave functions, their degeneracies and Yukawa couplings induced by magnetic fluxes are the same as those even in cases of other gauge groups.2 Another attractive direction is considering various boundary conditions of fields on point interactions (zerothickness branes) in the bulk space of a five-dimensional theory on S 1 (or a line segment)[47][48][49][50].3 Note that only T 2 -related cases were discussed in[61]. But, addressing other higher-dimensional tori is possible in principle in a similar method.…”

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confidence: 89%

Comprehensive analysis of Yukawa hierarchies onT2/ZNwith magnetic fluxes

et al. 2016

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Based on the result of classification in Ref.[1], we exhaustively investigate Yukawa sector of U (8) model on magnetized orbifolds T 2 /Z 2 , T 2 /Z 3 , T 2 /Z 4 and T 2 /Z 6 by evaluating ratios of the mass eigenvalues of the three states in all the possible configurations with one and two Higgs pairs where three generations are realized in fermions. Because of smearing effect via kinetic mixing, one can realize a hierarchy such as 10 −2 -10 −3 , but it is very difficult to achieve the mass ratio between the up and top quarks (m up /m top ∼ 10 −5 ) on the complicated magnetized orbifolds T 2 /Z N (N = 3, 4, 6).a

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Active Dirac neutrinos via SU(2) L doublets in 5d

Cited by 7 publications

References 104 publications

Supersymmetry is Not Dead

Supersymmetry is Not Dead

Flavor structures of charged fermions and massive neutrinos

Comprehensive analysis of Yukawa hierarchies onT2/ZNwith magnetic fluxes

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