scholarly journals High-Precision Microwave Spectroscopy of Muonium for Determination of Muonic Magnetic Moment

2016 ◽  
Vol 40 ◽  
pp. 1660076 ◽  
Author(s):  
H. A. Torii ◽  
Y. Higashi ◽  
T. Higuchi ◽  
Y. Matsuda ◽  
T. Mizutani ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Quantum Electrodynamics ◽  
Microwave Spectroscopy ◽  
Muonium Atom ◽  
Fundamental Properties ◽  
Systematic Uncertainties ◽  
Resonance Frequencies ◽  
Spectroscopy Experiment ◽  
Muon Intensity

The muonium atom is a system suitable for precision measurements for determination of muon’s fundamental properties as well as for the test of quantum electrodynamics (QED). A microwave spectroscopy experiment of this exotic atom is being prepared at J-PARC, jointly operated by KEK and JAEA in Japan, aiming at an improved relative precision at a level of [Formula: see text] in determination of the muonic magnetic moment. A major improvement of statistical uncertainty is expected with the higher muon intensity of the pulsed beam at J-PARC, while reduction of various sources of systematic uncertainties are being studied: those arising from microwave power fluctuations, magnetic field inhomogeneity, muon stopping distribution and atomic collisional shift of resonance frequencies. Experimental strategy and methods are presented in this paper, with an emphasis on our recent development of apparatuses and evaluation of systematic uncertainties.

scholarly journals STATUS AND PROSPECTS OF THE MUONIUM EXPERIMENT AT J-PARC

2014 ◽  
Vol 35 ◽  
pp. 1460435
Author(s):  
H. A. TORII ◽  
K. S. TANAKA ◽  
M. TAJIMA ◽  
T. MIZUTANI ◽  
Y. MATSUDA ◽  
...  
Keyword(s):  
Microwave Spectroscopy ◽  
Magnetic Field Inhomogeneity ◽  
Field Inhomogeneity ◽  
Relative Precision ◽  
Systematic Uncertainties ◽  
Resonance Frequencies ◽  
Spectroscopy Experiment ◽  
Muon Intensity ◽  
Density Shift

A microwave spectroscopy experiment of muonium atoms are being prepared at J-PARC in Japan, aiming at an improved relative precision at a level of 10-8 in determination of the muonic magnetic moment. A major improvement of statistical uncertainty is due to higher muon intensity of the pulsed beam at J-PARC, while further improvements are expected for systematic uncertainties. Reduction of sources of systematic uncertainties are being studied: those arising from microwave power fluctuations, magnetic field inhomogeneity, muon stopping distribution and gas-density shift of resonance frequencies. Status and prospects of studies and developments of the experiment is presented in this paper.

scholarly journals Quantum electrodynamics with self-conjugated equations with spinor wave functions for fermion fields

2021 ◽  
pp. 2150086
Author(s):  
V. P. Neznamov ◽  
V. E. Shemarulin
Keyword(s):  
Cross Sections ◽  
Magnetic Moment ◽  
Anomalous Magnetic Moment ◽  
Quantum Electrodynamics ◽  
Lamb Shift ◽  
Wave Functions ◽  
Self Energy ◽  
Fermion Fields ◽  
Spinor Wave

Quantum electrodynamics (QED) with self-conjugated equations with spinor wave functions for fermion fields is considered. In the low order of the perturbation theory, matrix elements of some of QED physical processes are calculated. The final results coincide with cross-sections calculated in the standard QED. The self-energy of an electron and amplitudes of processes associated with determination of the anomalous magnetic moment of an electron and Lamb shift are calculated. These results agree with the results in the standard QED. Distinctive feature of the developed theory is the fact that only states with positive energies are present in the intermediate virtual states in the calculations of the electron self-energy, anomalous magnetic moment of an electron and Lamb shift. Besides, in equations, masses of particles and antiparticles have the opposite signs.

scholarly journals Systematic uncertainties in the precise determination of the strangeness magnetic moment of the nucleon

2005 ◽  
Vol 24 (S2) ◽  
pp. 79-84 ◽  
Author(s):  
D.B. Leinweber ◽  
S. Boinepalli ◽  
A.W. Thomas ◽  
A.G. Williams ◽  
R.D. Young ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Precise Determination ◽  
Systematic Uncertainties

scholarly journals DETERMINATION OF THE PROPERTIES OF ELEMENTARY PARTICLES

2021 ◽  
Vol 7 (3(39)) ◽  
pp. 37-38
Author(s):  
Evgeny Georgievich Yakubovsky
Keyword(s):  
Standard Model ◽  
Magnetic Moment ◽  
Quantum Electrodynamics ◽  
Elementary Particles ◽  
The Standard Model

Particles of vacuum make it possible to determine the properties of elementary particles, but there is still a lot of work to develop the properties of particles of vacuum. The development of quantum electrodynamics and the standard model goes back 100 years. Meanwhile, the description of a lower level of masses and energies is 10 years old, and that is through the efforts of one person. When calculating the mass of elementary particles and their magnetic moment, linear formulas are used, which reduces the accuracy of the calculation. One must think about nonlinear corrections.

scholarly journals Systematic uncertainties in the precise determination of the strangeness magnetic moment of the nucleon

2005 ◽  
pp. 79-84
Author(s):  
D.B. Leinweber ◽  
S. Boinepalli ◽  
A.W. Thomas ◽  
A.G. Williams ◽  
R.D. Young ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Precise Determination ◽  
Systematic Uncertainties

scholarly journals Systematic uncertainties in the precise determination of the strangeness magnetic moment of the nucleon

2005 ◽  
Vol 141 ◽  
pp. 287-294
Author(s):  
D.B. Leinweber ◽  
S. Boinepalli ◽  
A.W. Thomas ◽  
A.G. Williams ◽  
R.D. Young ◽  
...  
Keyword(s):  
Magnetic Moment ◽  
Precise Determination ◽  
Systematic Uncertainties

STRUCTURE DETERMINATION OF 5 MEMBERED SILANE RINGS USING MICROWAVE SPECTROSCOPY

2018 ◽  
Author(s):  
Frank Marshall ◽  
G. Grubbs II ◽  
Gamil Guirgis ◽  
Theodore Carrigan-Broda ◽  
Grier Jones ◽  
...  
Keyword(s):  
Structure Determination ◽  
Microwave Spectroscopy

scholarly journals Probing neutrino magnetic moment at the Jinping neutrino experiment

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Baobiao Yue ◽  
Jiajun Liao ◽  
Jiajie Ling
Keyword(s):  
Magnetic Moment ◽  
Liquid Scintillator ◽  
Solar Neutrinos ◽  
Electron Neutrino ◽  
Neutrino Experiment ◽  
Neutrino Magnetic Moment ◽  
Systematic Uncertainties ◽  
Electron Recoil ◽  
Massive Neutrinos ◽  
Highly Correlated

Abstract Neutrino magnetic moment (νMM) is an important property of massive neutrinos. The recent anomalous excess at few keV electronic recoils observed by the XENON1T collaboration might indicate a ∼ 2.2 × 10−11μB effective neutrino magnetic moment ($$ {\mu}_{\nu}^{\mathrm{eff}} $$ μ ν eff ) from solar neutrinos. Therefore, it is essential to carry out the νMM searches at a different experiment to confirm or exclude such a hypothesis. We study the feasibility of doing νMM measurement with 4 kton fiducial mass at Jinping neutrino experiment (Jinping) using electron recoil data from both natural and artificial neutrino sources. The sensitivity of $$ {\mu}_{\nu}^{\mathrm{eff}} $$ μ ν eff can reach < 1.2 × 10−11μB at 90% C.L. with 10-year data taking of solar neutrinos. Besides the abundance of the intrinsic low energy background 14C and 85Kr in the liquid scintillator, we find the sensitivity to νMM is highly correlated with the systematic uncertainties of pp and 85Kr. Reducing systematic uncertainties (pp and 85Kr) and the intrinsic background (14C and 85Kr) can help to improve sensitivities below these levels and reach the region of astrophysical interest. With a 3 mega-Curie (MCi) artificial neutrino source 51Cr installed at Jinping neutrino detector for 55 days, it could give us a sensitivity to the electron neutrino magnetic moment ($$ {\mu}_{\nu_e} $$ μ ν e ) with < 1.1 × 10−11μB at 90% C.L. . With the combination of those two measurements, the flavor structure of the neutrino magnetic moment can be also probed at Jinping.

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