نتایج جستجو برای: elementary particle interaction

تعداد نتایج: 768607  

2003
J.-M. Frère Ernest Ma

It has recently been proposed that all fundamental fermion masses (whether Dirac or Majorana) come from effective dimension-five operators in the context of a truly minimal left-right model. We show how a particularly economical scheme emerges in a supersymmetric framework, where chiral symmetry breaking originates in the gaugino sector. In the Standard Model of particle interactions, the spont...

2003
J.-M. Frère Ernest Ma

It has recently been proposed that all fundamental fermion masses (whether Dirac or Majorana) come from effective dimension-five operators in the context of a truly minimal left-right model. We show how a particularly economical scheme emerges in a supersymmetric framework, where chiral symmetry breaking originates in the gaugino sector. In the standard model of particle interactions, the spont...

2010
John March-Russell Stephen M. West

We argue that WIMP dark matter can annihilate via long-lived “WIMPonium” bound states in reasonable particle physics models of dark matter (DM). WIMPonium bound states can occur at or near threshold leading to substantial enhancements in the DM annihilation rate, closely related to the Sommerfeld effect. Large “boost factor” amplifications in the annihilation rate can thus occur without large d...

2017
Claude Elbaz

The Standard Model of particles, experimentally validated by the Higgs boson detection, represents the crowning of quantum theory. It is admitted that the whole universe is composed of fundamental particles, at one and the same time for matter and for three out of the four different interactions. They all manifest experimentally either as waves or as particles, justifying that they leans upon a...

1998
J. C. Fabris

In the very early Universe the matter may be described by the free radiation, that is by the set of massless fields with negligible interactions between them. Then the dominating quantum effect is the trace anomaly which comes from the renormalization of the conformal invariant part of the vacuum action. The anomaly-induced effective action can be found with accuracy to an arbitrary conformal f...

2013
M R Tarbutt B E Sauer J J Hudson E A Hinds

We propose an experiment to measure the electric dipole moment (EDM) of the electron using ultracold YbF molecules. The molecules are produced as a thermal beam by a cryogenic buffer gas source, and brought to rest in an optical molasses that cools them to the Doppler limit or below. The molecular cloud is then thrown upward to form a fountain in which the EDM of the electron is measured. A non...

2016
Takaaki Kajita

Neutrinos are a type of fundamental particles, like electrons and quarks. They have no electric charge and they come in three types (flavors), namely the electron neutrino (νe), the muon neutrino (νμ) and the tau neutrino (ντ). They are produced in various places such as in the Earth’s atmosphere and in the center of the Sun. The interactions of neutrinos with matter are so weak that they easil...

2008
Andre Gsponer

We discuss the physical nature of elementary singularities arising in the complexified Maxwell field extended into complex spacetime, i.e., in Lanczos-Newman electrodynamics. We show that the translation of the world-line of a bare electric-monopole singularity into imaginary space is adding a magnetic-dimonopole component to it, so that it may be interpreted as a pseudo-scalar pion-proton inte...

2003
V. M. MOSTEPANENKO

Corrections to Newton's gravitational law inspired by extra dimensional physics and by the exchange of light and massless elementary particles between the atoms of two macrobodies are considered. These corrections can be described by the potentials of Yukawa-type and by the power-type potentials with different powers. The strongest up to date constraints on the corrections to Newton's gravitati...

1998
M. Pawlowski

The unification of general relativity and standard model for strong and electroweak interactions is considered on the base of the conformal symmetry principle. The Penrose-Chernikov-Tagirov Lagrangian is used to describe the Higgs scalar field modulus and gravitation. We show that the procedure of the Hamiltonian reduction converts the homogeneous part of the Higgs field into the dynamical para...

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