<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>P</mml:mi><mml:mo>,</mml:mo></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>T</mml:mi></mml:math>-violating electron-nucleon interactions in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>R</mml:mi></mml:math>-parity violating minimal supersymmetric standard model

Herczeg, P.

doi:10.1103/physrevd.61.095010

Cited by 23 publications

(38 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Again, we perform a fictitious manipulation by setting G 2 (p 2 ) = 0 and/or G 3 (p 2 ) = 0 when solving the SDE (26), (27), and (28). The result is plotted in Fig.…”

Section: B Quark Axial Charge: Analysismentioning

confidence: 99%

“…Phenomenologically, the pseudoscalar content of the nucleon N |qiγ 5 q|N is known to be large, due to the pion-pole contribution (see Fig. 21) [12,19,26,27]. This can be estimated phenomenologically as…”

Section: Quark Pseudoscalar Densitymentioning

confidence: 99%

“…This large value can make the observable effects of the quark pseudoscalar density important, although N |qiγ 5 q|N is suppressed nonrelativistically [26,27]. The expression of Eq.…”

Section: Quark Pseudoscalar Densitymentioning

confidence: 99%

“…The final charge of interest is the quark pseudoscalar density. Despite its nonrelativistic suppression, the effect of the pseudoscalar density is phenomenologically known to be sizable due to the large value of the matrix element itself [4,12,19,26,27]. This matrix element is also an important input in the search for new physics beyond the standard model [4,10,12,26].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism

et al. 2014

View full text Add to dashboard Cite

We calculate the scalar, axial, and pseudoscalar charges of the quark in the Schwinger-Dyson formalism of Landau gauge QCD. It is found that the dressed quark scalar density of the valence quark is significantly enhanced against the bare quark contribution, and the result explains qualitatively the phenomenologically known value of the pion-nucleon sigma term and also that given by lattice QCD. Moreover, we show that the Richardson's interquark potential suppresses the quark scalar density in the Higashjima-Miransky approximation. This fact suggests that the quark scalar density is an observable that is sensitive to quark confinement. For the quark axial charge, we find that it is suppressed due to the gluon dynamics. The result of the quenched analysis agrees qualitatively with the experimental data of the isovector axial coupling constant gA. We show that the suppression of the quenched axial charge is due to a mechanism similar to that of the quark tensor charge. In the Schwinger-Dyson equation with the leading unquenching quark-loop contribution the quark axial charge is more suppressed, due to the anomaly effect. The quark pseudoscalar density is found to be large, and is divergent as the bare quark becomes massless. This result is in agreement with the phenomenological current algebraic analysis, and explains well the dominance of the pion-pole contribution.

show abstract

“…Again, we perform a fictitious manipulation by setting G 2 (p 2 ) = 0 and/or G 3 (p 2 ) = 0 when solving the SDE (26), (27), and (28). The result is plotted in Fig.…”

Section: B Quark Axial Charge: Analysismentioning

confidence: 99%

Section: Quark Pseudoscalar Densitymentioning

confidence: 99%

“…This large value can make the observable effects of the quark pseudoscalar density important, although N |qiγ 5 q|N is suppressed nonrelativistically [26,27]. The expression of Eq.…”

Section: Quark Pseudoscalar Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism

et al. 2014

View full text Add to dashboard Cite

show abstract

“…Second, it has a very small SM contribution [4], so that any observation of finite EDM will be a direct indication of new physics. Finally, the EDM is sensitive to many new physics, in particular the supersymmetry, and many supersymmetric models with [5][6][7][8] and without [9][10][11][12][13][14][15][16] the conservation of R-parity have been studied.…”

mentioning

confidence: 99%

Sfermion loop contribution to the two-loop level fermion electric dipole moment inR-parity violating supersymmetric models

Yamanaka

2012

Phys. Rev. D

View full text Add to dashboard Cite

We evaluate the Barr-Zee type two-loop level contribution to the fermion electric and chromoelectric dipole moments with sfermion loop in R-parity violating supersymmetric models. It is found that the Barr-Zee type fermion dipole moment with sfermion loop acts destructively to the currently known fermion loop contribution, and that it has small effect when the mass of squarks or charged sleptons in the loop is larger than or comparable to that of the sneutrinos, but cannot be neglected if the sneutrinos are much heavier than loop sfermions.PACS numbers: 12.60. Jv, 11.30.Er, 13.40.Em, 14.80.Ly The supersymmetric extension of the standard model is one of the favored candidates of new physics. It has many advantages which resolve theoretical and observational problems of the standard model (SM), and has been exhaustively studied over decades [1]. The supersymmetric SM allows also baryon number or lepton number violating interactions, known as the R-parity violating (RPV) interactions. The RPV effects have also been constrained from the analysis of various phenomena [2].In searching for new physics beyond the SM, the electric dipole moment (EDM) plays a very important role. The EDM is an observable sensitive to the P and CP violations of the underlying theory, and provides excellent information about the new physics for many reasons. First, it can be measured in many systems and many accurate experimental data are available [3]. Second, it has a very small SM contribution [4], so that any observation of finite EDM will be a direct indication of new physics. Finally, the EDM is sensitive to many new physics, in particular the supersymmetry, and many supersymmetric models with [5][6][7][8] and without [9-16] the conservation of R-parity have been studied.In the RPV supersymmetric model with trilinear RPV interactions, it has been found that the fermion (quark or lepton) EDM does not receive any one-loop level contribution [10], and the two-loop level contribution has been analyzed in detail to give the Barr-Zee type diagram [17] with fermion loops as the leading contribution [12,15]. In previous works however, Barr-Zee type process with sfermion loops has not been considered so far, although it involves the same set of coupling constants. In this paper we will evaluate the Barr-Zee type diagrams with sfermion loop generated by RPV interactions to clarify the relative size between the currently known fermion loop contribution. It is actually found that the sfermion loop effect acts destructively to the fermion loop one, and that it can be significant in some situation.The RPV interactions are generated by the following superpotential:In the first line are written RPV terms, and in the last two lines the standard R-parity conserving Higgs-matter interactions. Indices i, j, k = 1, 2, 3 indicate the generation, and a, b = 1, 2 the SU (2) L indices. L and E c denote the lepton doublet and singlet left-chiral superfields. Q, U c and D c denote respectively the quark doublet, up quark singlet and down quark singlet left-c...

show abstract

CP-Violating Electron-Nucleon Interactions and CP-Violation Beyond the Standard Model

Herczeg¹

2004

Beyond the Desert 2003

View full text Add to dashboard Cite

P,T-violating electron-nucleon interactions in theR-parity violating minimal supersymmetric standard model

Cited by 23 publications

References 51 publications

Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism

Quark scalar, axial, and pseudoscalar charges in the Schwinger-Dyson formalism

Sfermion loop contribution to the two-loop level fermion electric dipole moment inR-parity violating supersymmetric models

CP-Violating Electron-Nucleon Interactions and CP-Violation Beyond the Standard Model

Contact Info

Product

Resources

About