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.

The award of medals by the President, Lord Porter, O.M., at the Anniversary Meeting, 30 November 1990

1991 ◽  
Vol 432 (1885) ◽  
pp. 147-151
Keyword(s):  
Elementary Particle ◽  
Parity Violation ◽  
Quantum Electrodynamics ◽  
Weak Interactions ◽  
Laws Of Nature ◽  
Dispersion Relations ◽  
Electroweak Theory ◽  
Particle Theory ◽  
Intermediate Bosons ◽  
Weak Forces

The Copley Medal is awarded to Professor A. Salam, K.B.E., F.R.S., in recognition of his work on the symmetries of the laws of nature, and especially the unification of the electromagnetic and weak forces. Professor Salam has made outstanding and influential contributions to elementary particle theory over a period of 40 years. His early work included the completion of Dyson's proof of the renormalization of quantum electrodynamics, and his work on parity violation, dispersion relations and SU(3) invariance. This work contributed greatly to the development of elementary particle theory, but his major contribution was the proposal, in parallel with S. Weinberg, of the electroweak theory, unifying quantum electrodynamics with the weak interactions between atomic particles. That theory, the first to bring together the theories of the atomic forces, received spectacular confirmation through the discovery at CERN in 1983 of W + and Z intermediate bosons.

Two [Ln4] molecular rings folded as compact tetrahedra

2020 ◽  
Vol 49 (21) ◽  
pp. 7182-7188
Author(s):  
Jorge Salinas-Uber ◽  
Leoní A. Barrios ◽  
Olivier Roubeau ◽  
Guillem Aromí
Keyword(s):  
Weak Interactions ◽  
Molecular Rings

A new highly photo-switchable ligand furnishes supramolecular tetrahedral nanomagnets with Ln(iii) ions (Ln = Dy, Tb). Intramolecular weak interactions define the conformation of the ligand, quenching the photochromic activity.

BETA DECAY OPENS THE WAY TO WEAK INTERACTIONS

1982 ◽  
Vol 43 (C8) ◽  
pp. C8-261-C8-300
Author(s):  
E. Amaldi
Keyword(s):  
Beta Decay ◽  
Weak Interactions ◽  
The Way

scholarly journals The effect of weak interactions on the shape of cadmium(II) coordination polymers with pyridine-based hydrazines

2015 ◽  
Vol 71 (a1) ◽  
pp. s434-s435
Author(s):  
Boris-Marko Kukovec ◽  
Nikolina Penić ◽  
Nives Matijaković ◽  
Marijana Đaković
Keyword(s):  
Coordination Polymers ◽  
Weak Interactions

scholarly journals Functionalised Terpyridines and Their Metal Complexes—Solid-State Interactions

Chemistry ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 199-227
Author(s):  
Young Hoon Lee ◽  
Jee Young Kim ◽  
Sotaro Kusumoto ◽  
Hitomi Ohmagari ◽  
Miki Hasegawa ◽  
...  
Keyword(s):  
Solid State ◽  
Metal Complexes ◽  
Crystal Structures ◽  
Weak Interactions ◽  
Dispersion Interactions ◽  
Derivatives Of

Analysis of the weak interactions within the crystal structures of 33 complexes of various 4′-aromatic derivatives of 2,2′:6′,2″-terpyridine (tpy) shows that interactions that exceed dispersion are dominated, as expected, by cation⋯anion contacts but are associated with both ligand–ligand and ligand–solvent contacts, sometimes multicentred, in generally complicated arrays, probably largely determined by dispersion interactions between stacked aromatic units. With V(V) as the coordinating cation, there is evidence that the polarisation of the ligand results in an interaction exceeding dispersion at a carbon bound to nitrogen with oxygen or fluorine, an interaction unseen in the structures of M(II) (M = Fe, Co, Ni, Cu, Zn, Ru and Cd) complexes, except when 1,2,3-trimethoxyphenyl substituents are present in the 4′-tpy.

scholarly journals Studies of Conformational Changes of Tubulin Induced by Interaction with Kinesin Using Atomistic Molecular Dynamics Simulations

2021 ◽  
Vol 22 (13) ◽  
pp. 6709
Author(s):  
Xiao-Xuan Shi ◽  
Peng-Ye Wang ◽  
Hong Chen ◽  
Ping Xie
Keyword(s):  
Molecular Dynamics ◽  
High Resolution ◽  
Binding Energy ◽  
Molecular Dynamics Simulations ◽  
Conformational Changes ◽  
Weak Interactions ◽  
Molecular Motor ◽  
Structural Data ◽  
Calculated Binding Energy ◽  
Dynamics Simulations

The transition between strong and weak interactions of the kinesin head with the microtubule, which is regulated by the change of the nucleotide state of the head, is indispensable for the processive motion of the kinesin molecular motor on the microtubule. Here, using all-atom molecular dynamics simulations, the interactions between the kinesin head and tubulin are studied on the basis of the available high-resolution structural data. We found that the strong interaction can induce rapid large conformational changes of the tubulin, whereas the weak interaction cannot. Furthermore, we found that the large conformational changes of the tubulin have a significant effect on the interaction of the tubulin with the head in the weak-microtubule-binding ADP state. The calculated binding energy of the ADP-bound head to the tubulin with the large conformational changes is only about half that of the tubulin without the conformational changes.

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