THE SUPERSYMMETRIC TWO-LOOP CORRECTIONS TO MUON MAGNETIC DIPOLE MOMENTS IN THE CP-VIOLATING MSSM

2012 ◽  
Vol 27 (14) ◽  
pp. 1250045 ◽  
Author(s):  
SHU-MIN ZHAO ◽  
TAI-FU FENG ◽  
TONG LI ◽  
XUE-QIAN LI ◽  
KE-SHENG SUN
Keyword(s):  
Dipole Moment ◽  
Magnetic Dipole ◽  
Magnetic Dipole Moment ◽  
Dipole Moments ◽  
Ultra Violet ◽  
Supersymmetric Extension ◽  
Effective Lagrangian ◽  
The Standard Model ◽  
Zero Momentum ◽  
Minimal Supersymmetric Extension

Using the effective Lagrangian method, we study the electroweak corrections to the magnetic dipole moment of muon from some special two-loop topological diagrams which are composed of chargino–sneutrino, neutralino–slepton, slepton–sneutrino, in the CP-violating minimal supersymmetric extension of the standard model. Considering the electromagnetic gauge invariance, we obtain the Wilson coefficients of those dimension 6 operators which induce the magnetic dipole moment of leptons. Adopting the zero-momentum substraction scheme, we remove the ultra-violet divergences induced by the divergent sub-diagrams. The numerical results indicate that the two-loop supersymmetric corrections from this sector to the muon magnetic dipole moment can exceed 10-10, which is the same order of present experimental precision.

SOME TWO-LOOP CONTRIBUTIONS TO MUON MAGNETIC DIPOLE MOMENT IN THE CP-VIOLATING MSSM

2013 ◽  
Vol 28 (40) ◽  
pp. 1350173 ◽  
Author(s):  
SHU-MIN ZHAO ◽  
FANG WANG ◽  
BIAO CHEN ◽  
TAI-FU FENG ◽  
HAI-BIN ZHANG ◽  
...  
Keyword(s):  
Dipole Moment ◽  
Magnetic Dipole ◽  
Gauge Invariance ◽  
Magnetic Dipole Moment ◽  
Ultra Violet ◽  
Supersymmetric Extension ◽  
Self Energy ◽  
The Standard Model ◽  
The One ◽  
Minimal Supersymmetric Extension

In the CP-violating minimal supersymmetric extension of the Standard Model (MSSM), we study the two-loop diagrams without the one-loop self-energy, and they are composed of virtual neutralino–slepton-Z. We obtain electroweak corrections to the anomalous magnetic dipole moment (MDM) of muon. With electromagnetic gauge invariance, the Wilson coefficients of dimension-5 operators contributing to the MDM of muon are deduced. To remove the ultra-violet divergences induced by the divergent sub-diagrams, we use the on-shell scheme. The numerical results are about 8.8×10-11, i.e. at the same order of present experimental precision, which indicates these two-loop diagrams are important.

HQC with the AC setup associated with topological defects

2011 ◽  
Vol 11 (5&6) ◽  
pp. 444-455
Author(s):  
Knut Bakke ◽  
Cláudio Furtado
Keyword(s):  
Dipole Moment ◽  
Electric Field ◽  
Magnetic Dipole ◽  
Magnetic Dipole Moment ◽  
Topological Defect ◽  
Dipole Moments ◽  
Topological Defects ◽  
Quantum Phases ◽  
Neutral Particles ◽  
New Formulation

In this work, we propose a new formulation allowing to realize the holonomic quantum computation with neutral particles with a permanent magnetic dipole moments interacting with an external electric field in the presence of a topological defect. We show that both the interaction of the electric field with the magnetic dipole moment and the presence of topological defect generate independent contributions to the geometric quantum phases which can be used to describe any arbitrary rotation on the magnetic dipole moment without using the adiabatic approximation.

scholarly journals Magnetic dipole moments of the hidden-charm pentaquark states: $$P_c(4440)$$, $$P_c(4457)$$ and $$P_{cs}(4459)$$

2021 ◽  
Vol 81 (4) ◽  
Author(s):  
Ulaş Özdem
Keyword(s):  
Dipole Moment ◽  
Magnetic Dipole ◽  
Magnetic Dipole Moment ◽  
Molecular Form ◽  
Dipole Moments ◽  
Electric Quadrupole ◽  
Spherical Charge ◽  
Photon Distribution ◽  
Sum Rule ◽  
Quantum Numbers

AbstractIn this work, we employ the light-cone QCD sum rule to calculate the magnetic dipole moments of the $$P_c(4440)$$ P c ( 4440 ) , $$P_c(4457)$$ P c ( 4457 ) and $$P_{cs}(4459)$$ P cs ( 4459 ) pentaquark states by considering them as the diquark–diquark–antiquark and molecular pictures with quantum numbers $$J^P = \frac{3}{2}^-$$ J P = 3 2 - , $$J^P = \frac{1}{2}^-$$ J P = 1 2 - and $$J^P = \frac{1}{2}^-$$ J P = 1 2 - , respectively. In the analyses, we use the diquark–diquark–antiquark and molecular form of interpolating currents, and photon distribution amplitudes to obtain the magnetic dipole moment of pentaquark states. Theoretical examinations on magnetic dipole moments of the hidden-charm pentaquark states, are essential as their results can help us better figure out their substructure and the dynamics of the QCD as the theory of the strong interaction. As a by product, we extract the electric quadrupole and magnetic octupole moments of the $$P_c(4440)$$ P c ( 4440 ) pentaquark. These values show a non-spherical charge distribution.

scholarly journals Muon (g − 2) in the B-LSSM

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Jin-Lei Yang ◽  
Hai-Bin Zhang ◽  
Chang-Xin Liu ◽  
Xing-Xing Dong ◽  
Tai-Fu Feng
Keyword(s):  
Dipole Moment ◽  
Higgs Boson ◽  
Standard Model ◽  
Magnetic Dipole ◽  
Magnetic Dipole Moment ◽  
Standard Model Prediction ◽  
Boson Mass ◽  
Experimental Result ◽  
Supersymmetric Model ◽  
The Standard Model

Abstract The difference between the updated experimental result on the muon anomalous magnetic dipole moment and the corresponding theoretical prediction of the standard model on that is about 4.2 standard deviations. In this work, we calculate the muon anomalous MDM at the two-loop level in the supersymmetric B − L extension of the standard model. Considering the experimental constraints on the lightest Higgs boson mass, Higgs boson decay modes h → γγ, WW, ZZ, $$ b\overline{b} $$ b b ¯ , $$ \tau \overline{\tau} $$ τ τ ¯ , B rare decay $$ \overline{B} $$ B ¯ → Xsγ, and the transition magnetic moments of Majorana neutrinos, we analyze the theoretical predictions of the muon anomalous magnetic dipole moment in the B − L supersymmetric model. The numerical analyses indicate that the tension between the experimental measurement and the standard model prediction is remedied in the B − L supersymmetric model.

scholarly journals τ−→ ℓi−ℓi+ℓj−ν̄jντ decays with a magnetic dipole term

2017 ◽  
Vol 32 (33) ◽  
pp. 1750195 ◽  
Author(s):  
M. A. Arroyo-Ureña ◽  
E. Díaz ◽  
O. Meza-Aldama ◽  
G. Tavares-Velasco
Keyword(s):  
Dipole Moment ◽  
Standard Model ◽  
Magnetic Dipole ◽  
Magnetic Dipole Moment ◽  
Branching Ratio ◽  
Experimental Measurements ◽  
Helicity Formalism ◽  
The Standard Model ◽  
Dipole Term

Using the massive helicity formalism, we calculate the five-body average square amplitude of the decays [Formula: see text] [Formula: see text] within the Standard Model (SM), we then introduce a dimension-five effective vertex [Formula: see text] in order to determine the feasibility of imposing limits on the tau anomalous magnetic dipole moment [Formula: see text] via the current or future experimental measurements of the branching ratio for the decay [Formula: see text].

The nuclear magnetic dipole moments of the stable isotopes of europium and the hyperfine structure anomaly

1960 ◽  
Vol 257 (1289) ◽  
pp. 277-282 ◽  
Keyword(s):  
Stable Isotopes ◽  
Dipole Moment ◽  
Hyperfine Structure ◽  
Magnetic Dipole ◽  
Atomic Beam ◽  
Magnetic Dipole Moment ◽  
Dipole Moments ◽  
New Method ◽  
Hyperfine Structures ◽  
Nuclear Magnetic

The nuclear magnetic dipole moment of 151 Eu and the ratio of the moments of 151 Eu and 153 Eu have been measured by the new method of resonance in three loops in a short atomic beam. The results are: μ ( 151 Eu) = 3·419 ± 0·004 n.m.; μ ( 151 Eu) / μ ( 153 Eu)= 2·2686 ± 0·0015. The result, taken together with the ratio of the hyperfine structures of europium, gives a hyperfine structure anomaly of (1·0 + 0·23)%. A theoretical value of the anomaly is estimated.

scholarly journals THE HIGGS PENGUIN AND ITS APPLICATIONS: AN OVERVIEW

2003 ◽  
Vol 18 (37) ◽  
pp. 2627-2644 ◽  
Author(s):  
ATHANASIOS DEDES
Keyword(s):  
Standard Model ◽  
B Meson ◽  
Higgs Sector ◽  
Complete List ◽  
Supersymmetric Extension ◽  
B Meson Decays ◽  
Meson Decays ◽  
Effective Lagrangian ◽  
The Standard Model ◽  
Minimal Supersymmetric Extension

We review the effective Lagrangian of the Higgs penguin in the Standard Model and its minimal supersymmetric extension (MSSM). As a master application of the Higgs penguin, we discuss in some detail the B-meson decays into a lepton–antilepton pair. Furthermore, we explain how this can probe the Higgs sector of the MSSM provided that some of these decays are seen at Tevatron Run II and B-factories. Finally, we present a complete list of observables where the Higgs penguin could be strongly involved.

scholarly journals Phenomenology of the new physics coming from 2HDMs to the neutrino magnetic dipole moment

2017 ◽  
Vol 32 (10) ◽  
pp. 1750050
Author(s):  
Carlos G. Tarazona ◽  
Rodolfo A. Diaz ◽  
John Morales ◽  
Andrés Castillo
Keyword(s):  
Dipole Moment ◽  
Magnetic Dipole ◽  
Magnetic Dipole Moment ◽  
Higgs Mass ◽  
Dipole Moments ◽  
Vacuum Expectation ◽  
Higgs Doublet ◽  
New Physics ◽  
Charged Higgs ◽  
Two Higgs Doublet Models

In several frameworks for leptons sectors of Two Higgs Doublet Models, we calculate the magnetic dipole moment for different flavor types of neutrino. Computations are carried out by assuming a normal hierarchy for neutrino masses, and analyzing the process [Formula: see text] with a charged Higgs boson into the loop. The analysis was performed by sweeping the charged Higgs mass and taking into account the experimental constraints for relevant parameters in Two Higgs Doublet Models with and without flavor changing neutral currents; obtaining magnetic dipole moments close to the experimental thresholds for tau neutrinos in type II and lepton-specific cases. In the neutrino-specific scenario, the contribution of new physics could be sizeable to the current measurement for flavor magnetic dipole moment. This fact leads to excluding possible zones in the parameter space of charged Higgs mass and vacuum expectation value of the second doublet.

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