A NEW METHOD TO MEASURE THE ELECTROMAGNETIC PROPERTY OF THE W BOSON IN e+e− COLLISIONS

1992 ◽  
Vol 07 (14) ◽  
pp. 3291-3310 ◽  
Author(s):  
HIROTOMO IWASAKI
Keyword(s):  
W Boson ◽  
Event Rate ◽  
Electromagnetic Property ◽  
Electric Quadrupole ◽  
Systematic Errors ◽  
New Method ◽  
Quadrupole Moments ◽  
Energy Distributions ◽  
Background Elimination ◽  
Magnetic Quadrupole

With the effective WW γ couplings incorporating the magnetic dipole, electric dipole, magnetic quadrupole and electric quadrupole moments of the W boson, the cross-section of e+e− → e±νe W ∓ is evaluated exactly and its sensitivity to these moments is investigated. The background elimination is discussed for the measurement of the WW γ couplings, and the resulting event rate of the single-W production is evaluated at [Formula: see text] and 500 GeV. Also, a new method for the precision measurement of the WW γ coupling is proposed: it utilizes the distinction of the W boson energy distributions of the annihilation and nonannihilation contributions and reduces the systematic errors.

Hyperfine structures of the resonance lines of indium 115

1957 ◽  
Vol 241 (1226) ◽  
pp. 283-298 ◽  
Keyword(s):  
Electric Quadrupole ◽  
Systematic Errors ◽  
Coupling Factor ◽  
Probable Error ◽  
Microwave Measurements ◽  
Doppler Width ◽  
Quadrupole Moments ◽  
Quadrupole Coupling ◽  
Fabry Perot ◽  
Hyperfine Structures

The hyperfine structures of the two visible resonance lines of the arc spectrum of indium 115 have been measured in the absorption of a multiple atomic beam of high collimation by means of a double Fabry-Perot interferometer; the combined instrumental and Doppler width of the absorption lines was less than 5 mK (0∙005 cm -1 ). By taking the necessary precautions to avoid systematic errors and by measuring a large number of different interferograms to reduce the random error it has been possible to measure the h. f. s. of the lines 4101 and 4511 Å with an accuracy sufficient to allow the intervals of the terms 5 2 P 3/2 , 5 2 P ½ and 6 S ½ to be determined with a probable error of 0∙07 mK. The ratios of the three h. f. s. intervals of the term 5 2 P 3/2 are in agreement, within the limits of the probable error, with those required on the assumption that the h. f. s. is due to nuclear magnetic dipole and electric quadrupole moments; the value found for the dipole coupling factor, A , is 8∙083 ± 0∙01 mK and for the quadrupole coupling factor, B , is 15∙10 ± 0∙1 mK. A comparison is made between the values of the h. f. s. intervals found in this work and those found by microwave measurements, since one of the principal aims of this research is to test the agreement between the results found by optical spectroscopic methods and by microwave methods.

The Deformation Structure of the Nuclei 32S and 36Ar

2017 ◽  
Vol 13 (2) ◽  
pp. 4678-4688
Author(s):  
K. A. Kharroube
Keyword(s):  
Single Particle ◽  
Electric Quadrupole ◽  
Quadrupole Moments ◽  
Moments Of Inertia ◽  
Deformation Structures ◽  
Particle Potential ◽  
Nilsson Model ◽  
Single Particle Potential ◽  
Axes Of Symmetry ◽  
Good Agreement

We applied two different approaches to investigate the deformation structures of the two nuclei S32 and Ar36 . In the first approach, we considered these nuclei as being deformed and have axes of symmetry. Accordingly, we calculated their moments of inertia by using the concept of the single-particle Schrödinger fluid as functions of the deformation parameter β. In this case we calculated also the electric quadrupole moments of the two nuclei by applying Nilsson model as functions of β. In the second approach, we used a strongly deformed nonaxial single-particle potential, depending on Î² and the nonaxiality parameter γ , to obtain the single-particle energies and wave functions. Accordingly, we calculated the quadrupole moments of S32 and Ar36 by filling the single-particle states corresponding to the ground- and the first excited states of these nuclei. The moments of inertia of S32 and Ar36 are then calculated by applying the nuclear superfluidity model. The obtained results are in good agreement with the corresponding experimental data.

scholarly journals Thermodynamic approach to electric quadrupole moments

2020 ◽  
Vol 102 (23) ◽  
Author(s):  
Akito Daido ◽  
Atsuo Shitade ◽  
Youichi Yanase
Keyword(s):  
Electric Quadrupole ◽  
Thermodynamic Approach ◽  
Quadrupole Moments

scholarly journals The Molecular Zeeman Effect of Imines. I. Methanimine, its Molecular g-Tensor, its Magnetic Susceptibility Anisotropies, its Molecular Electric Quadrupole Moment, its Electric Field Gradient at the Nitrogen Nucleus, and its Nitrogen Spin-Rotation Coupling

1989 ◽  
Vol 44 (11) ◽  
pp. 1063-1078 ◽  
Author(s):  
H. Krause ◽  
D. H. Sutter
Keyword(s):  
Magnetic Susceptibility ◽  
Zeeman Effect ◽  
Electric Quadrupole ◽  
Spin Rotation ◽  
Coupling Constants ◽  
Zero Field ◽  
Quadrupole Moments ◽  
Magnetic Susceptibility Tensor ◽  
State Expectation ◽  
The Individual

Abstract The rotational Zeeman effect has been observed in methanimine which was produced from ethylenediamine by flash pyrolysis. The observed vibronic ground state expectation values of the molecular g-values, the magnetic susceptibility anisotropies and the molecular electric quadrupole moments are: gaa = -1.27099(22), gbb= -0.18975(7), gcc= -0.03440(8), 2ξaa-ξbb-ξcc = 12.49(19) · 10-6 ergG-2mol-1, 2ξbb-ξcc-ξaa = 5.22(11) · 10-6 ergG-2 mol-1 Qaa = 0.43(17) · 10-26esu cm2, Qbb= 1.08(10) · 10-26 esu cm2, and Qcc= -1.51 (26) . 10-26 esu cm2. With the TZVP ab initio value for the out-off plane electronic second moment as additional input, reliable values can be given also for the individual components of the magnetic susceptibility tensor and for the bulk susceptibility:ξ = (ξaa + ξbb + ξcc)/3=-13.13(88) · 10-6 erg G -2 mol-1. From low-J a-and b-type zero field transitions the spin-rotation coupling constants and the 14N nuclear quadrupole coupling constants could be redetermined with improved accuracy. These data are compared with our new theoretical results.

Electric quadrupole moments of the first excited states of 28Si, 32S and 34S

1980 ◽  
Vol 349 (1-2) ◽  
pp. 271-284 ◽  
Author(s):  
G.C. Ball ◽  
O. Häusser ◽  
T.K. Alexander ◽  
W.G. Davies ◽  
J.S. Forster ◽  
...  
Keyword(s):  
Excited States ◽  
Electric Quadrupole ◽  
Quadrupole Moments

Systematic description of nuclear electric quadrupole moments

2018 ◽  
Vol 42 (12) ◽  
pp. 124105
Author(s):  
Xiao-Jun Sun ◽  
Chun-Xing Chen ◽  
Ning Wang ◽  
Hou-Bing Zhou
Keyword(s):  
Electric Quadrupole ◽  
Quadrupole Moments ◽  
Systematic Description

ELECTROWEAK BOSON SELF-COUPLINGS AND THE SCALE OF COMPOSITENESS

1988 ◽  
Vol 03 (01) ◽  
pp. 225-242 ◽  
Author(s):  
J.A. GRIFOLS ◽  
S. PERIS ◽  
J. SOLÅ
Keyword(s):  
Magnetic Dipole ◽  
Electric Quadrupole ◽  
Quadrupole Moments ◽  
Weak Boson ◽  
Experimental Rate ◽  
Experimental Constraint ◽  
Electroweak Boson

The experimental constraint on [Formula: see text] and the experimental rate of the process KL→μμ are used to bound hypothetical nonstandard self-interactions of the electroweak bosons. In particular, we give bounds on anomalous magnetic dipole and electric quadrupole moments of the charged weak boson.

INELASTIC PHOTOPRODUCTION OF W-BOSON

1998 ◽  
Vol 13 (25) ◽  
pp. 2013-2020
Author(s):  
S. M. KHAIRUL ALAM ◽  
A. M. HARUN AR RASHID
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
W Boson ◽  
Electric Quadrupole ◽  
Parton Model ◽  
High Energy ◽  
Electric Quadrupole Moment ◽  
Photoproduction Process ◽  
Quark Parton Model ◽  
High Energy Collider

We study the WWγ vertex through the process γq→Wq′ where q denotes the quark at a future high energy collider. The differential cross-section for the photoproduction process γq→Wq′ is computed with both anomalous magnetic moment κ and electric quadrupole moment λ for the W-boson. The deep inelastic photoproduction of W± is also calculated in a quark-parton model.

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