Results 331 to 340 of about 3,312,964 (370)

The nature of elementary particles

Physics Today, 1976
The question, “What is an elementary particle?” must find its answer primarily in experiment, although it must also be confronted with philosphical considerations. I will therefore begin by giving a short survey of the important experimental results of the last fifty years.
openaire   +2 more sources

Introduction to Elementary Particle Physics

, 2009
This is a short review of Particle Physics and the most widely accepted theory, the Standard Model, with its questions and limitations. We also show a quick review of some of te theories beyonf the Standard Model.
C. J. S. Salinas, K. Hurtado, C. Romero, C. J. S. Salinas, J. Bellido, D. Wahl, Oscar Saavedra   +6 more
semanticscholar   +1 more source

Molecules and elementary particles

Biosystems, 1977
A new field theory based on a generalization of Einstein's general theory of relativity is briefly discussed and some of its predictions and their comparisons with recent experiments are presented.
openaire   +3 more sources

Bremsstrahlung of very low-energy quanta in elementary particle collisions

, 1958
It is shown that the first two terms in the series expansion of the differential bremsstrahlung cross section (in powers of the energy loss) may be calculated exacthy in terms of the corresponding elastic amplitude and the electromagnetic constants of ...
F. Low
semanticscholar   +1 more source

Theory of Elementary Particles

Science, 1955
It is obvious that at the present state of our knowledge it would be hopeless to try to find the correct theory of the elementary particles. On the other hand, one may try to form some kind of picture of how such a future theory of elementary particles will look, because, even if we realize that we know only very few details about the elementary ...
openaire   +3 more sources

Elementary Particle Theory of Composite Particles

, 1963
Any nonrelativistic theory may be rewritten by introducing fictitious elementary particles with arbitrary properties. No physical predictions are affected, provided that the interaction part of the Hamiltonian is correspondingly modified.
S. Weinberg
semanticscholar   +1 more source

Elementary particles

Journal of the Franklin Institute, 1967
Elementary particles are marvelous bits of matter out of which the whole universe is made, including us; each one exhibits everywhere the same properties, whether in the laboratory or in distant galaxies. We know that there are a number of different kinds of these elementary bits of matter interacting and transforming into one another under the ...
openaire   +2 more sources

Unified Model of the Nambu-Jona-Lasinio Type for All Elementary Particle Forces

, 1977
The unified model for all elementary-particle forces recently proposed by us is discussed in detail. Starting with a nonlinear fermion Lagrangian of the Nambu-Jona-Lasinio type and imposing the massless conditions of Bjorken on vector fields, we ...
H. Terazawa, Y. Chikashige, Keiichi Akama   +2 more
semanticscholar   +1 more source

Evidence That the Deuteron Is Not an Elementary Particle

, 1965
If the deuteron were an elementary particle then the triplet n−p effective range would be approximately −ZR(I−Z), where R=4.31 F is the usual deuteron radius and Z is the probability of finding the deuteron in a bare elementary-particle state.
S. Weinberg
semanticscholar   +1 more source

Recoil effects in allowed beta decay: The elementary particle approach

, 1974
Allowed beta decay is studied using the elementary particle approach including all second forbidden terms. Model independent forms are given for various spectrum and correlation effects with parent polarization and/or orientation and for delayed particle
B. Holstein
semanticscholar   +1 more source