scholarly journals Effect of neutrino electromagnetic form factors on the neutrino cross section in dense matter

2006 ◽  
Vol 73 (2) ◽  
Author(s):  
A. Sulaksono ◽  
C. K. Williams ◽  
P. T. P. Hutauruk ◽  
T. Mart
Keyword(s):  
Cross Section ◽  
Form Factors ◽  
Dense Matter ◽  
Electromagnetic Form Factors ◽  
Neutrino Cross Section

scholarly journals Multipole expansion for the electron-nucleus scattering at high energies in the unified electroweak theory

2014 ◽  
Vol 4 (4) ◽  
pp. 38-44
Author(s):  
Zuyen Phu Luong ◽  
Huu Ha Nguyen
Keyword(s):  
Cross Section ◽  
Weak Interactions ◽  
Form Factors ◽  
Multipole Expansion ◽  
Electromagnetic Form Factors ◽  
Electroweak Theory ◽  
High Energies ◽  
Nucleus Scattering ◽  
Partial Form ◽  
Definite Angular Momentum

The article presents the multipole expansion for the electron-nucleus scattering cross-section at high energies within framework of the unified electroweak theory. The electroweak currents of  the nucleus is expanded into simple components with definite angular momentum, which are called the multipole form factors. The multipole expansion of the cross-section is a consequence of the above expansion. Besides the familiar electromagnetic form factors FxL , there are new form factors VLX and ALX related to weak interactions, corresponding to the vector and axial weak currents. The obtained general expressions are applied to the nucleus 36Li , where the partial form factors are computed in the multiparticle shell model.

N* RESONANCES IN NEUTRINO INTERACTIONS

2014 ◽  
Vol 26 ◽  
pp. 1460111
Author(s):  
L. ALVAREZ-RUSO
Keyword(s):  
Cross Section ◽  
Form Factors ◽  
Experimental Information ◽  
Transition Form ◽  
Neutrino Interactions ◽  
Neutrino Cross Section ◽  
The Cross

The role of N* resonances in neutrino interactions with nucleons is discussed, stressing the relevance for neutrino cross-section and oscillation experiments. The cross section for single N* weak excitation is expressed in terms of vector and axial transition form factors, which can be partially constrained using the available experimental information from photon, electron and pion reactions on the nucleon. New measurements on hydrogen and deuterium are necessary to reduce further the uncertainties.

scholarly journals Polarization Effects in the Reaction d+eˉ → d+eˉ

2021 ◽  
Keyword(s):  
Differential Cross Section ◽  
Cross Section ◽  
Differential Cross ◽  
Beam Energy ◽  
Deuteron Beam ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Tensor Polarization ◽  
Analyzing Powers ◽  
Polarization Observables

The differential cross section and polarization observables for the elastic reaction induced by deuteron scattering off electrons at rest, are calculated in the one-photon-exchange approximation. The following polarization observables were calculated: 1- the analyzing powers (asymmetries) due to the tensor polarization of the deuteron beam, 2 - the spin correlation coefficients caused by the arbitrarily polarized electron target and the vector polarized deuteron beam, 3 - the coefficients of the polarization transfer from the arbitrarily polarized target electron to the recoil electrons. The differential cross section and polarization observables have been expressed in terms of the deuteron electromagnetic form factors: (charge monopole), (magnetic dipole) and (charge quadrupole). Numerical estimations are given for the analyzing powers (asymmetries) due to the tensor polarization of the deuteron beam. They are calculated as functions of the deuteron beam energy for some values of the scattering angle (the angle between the deuteron beam and the recoil electron momenta). For the numerical calculation we use the existing phenomenological parametrization of the deuteron electromagnetic form factors. It turns out that the analyzing powers (asymmetries) are increasing with the growth of the deuteron beam energy and they have appreciable sensitivity to the value of the scattering angle. The specific interest of this reaction is to investigate the possibility to use this reaction for the measurement of the polarization of the high energy deuteron beams.

scholarly journals Production Mechanism of the Charmed Baryon Λc+

Symmetry ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 5
Author(s):  
Weiping Wang ◽  
Xiaorong Zhou ◽  
Rinaldo Baldini Ferroli ◽  
Guangshun Huang
Keyword(s):  
Cross Section ◽  
Production Cross ◽  
Center Of Mass ◽  
Polar Angle ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Production Mechanism ◽  
Charmed Baryon ◽  
Electron Positron ◽  
State Radiation

As the lightest charmed baryon, precision measurement of the pair production cross section of provides unprecedented experimental information for the investigation of baryon production mechanism. In addition, the extraction of the polar angle distributions of the outgoing in the annihilation of the electron–positron help to determine its electromagnetic form factors, which is currently the unique key to access the internal structure of the baryons. In this article, the measurement of process via the initial state radiation technique at Belle detector and direct electron–positron annihilation at BESIII with discrete center-of-mass energies near threshold are briefly reviewed. In addition, the electromagnetic form factor ratios of measured by BESIII are also investigated. A few theoretical models that parameterize the center-of-mass energy dependence of the cross section and electromagnetic form factors of baryon are introduced and the contributions of data to them are discussed.

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