نتایج جستجو برای: elementary

تعداد نتایج: 50717  

2005
Thorsten Ohl Jürgen Reuter

Extensions of the Standard Model of elementary particle physics to noncommutative geometries have been proposed as a low energy limit of string models. Independent of this motivation, one may consider such a model as an effective field theory with higher-dimensional operators containing an antisymmetric rank-two background field. We study the signals of such a Noncommutative Standard Model (NCS...

2003
C. Burgess

We re-examine the sensitivity of solar neutrino oscillations to noise in the solar interior using the best current estimates of neutrino properties. Our results show that the measurement of neutrino properties at KamLAND provides new information about fluctuations in the solar environment on scales to which standard helioseismic constraints are largely insensitive. We also show how the determin...

2003
B. G. Sidharth B. M. Birla

Using the interquark potential we obtain a formula for the mass spectrum of elementary particles. The simple formula gives the masses of all known elementary particles with an error of about three percent or less. This includes the recently discovered Ds(2317) and 1.5GeV Pentaquark particles. One of the problems that has eluded a solution is that of a mass spectrum for elementary particles. Suc...

2011
Takuya KASHIMURA Tomonari SEI Akimichi TAKEMURA Kentaro TANAKA Takuya Kashimura Tomonari Sei Akimichi Takemura Kentaro Tanaka

We study properties of semi-elementary imsets and elementary imsets introduced by Studený [10]. The rules of the semi-graphoid axiom (decomposition, weak union and contraction) for conditional independence statements can be translated into a simple identity among three semi-elementary imsets. By recursively applying the identity, any semi-elementary imset can be written as a sum of elementary i...

1969
Robert H. Risch M. H. Protter

Introduction. The problem of integration in finite terms asks for an algorithm for deciding whether an elementary function has an elementary indefinite integral and for finding the integral if it does. "Elementary" is used here to denote those functions built up from the rational functions using only exponentiation, logarithms, trigonometric, inverse trigonometric and algebraic operations. This...

2015
Patrick Koppenburg Vincenzo Vagnoni

The understanding of flavour dynamics is one of the key aims of elementary particle physics. The last 15 years have witnessed the triumph of the Kobayashi-Maskawa mechanism, which describes all flavour changing transitions of quarks in the Standard Model. This important milestone has been reached owing to a series of experiments, in particular to those operating at the so-called B factories, at...

2014
Erhard Scholz

It is discussed how the Weyl geometric generalization of Riemannian geometry relates to Jordan-Brans-Dicke theory and how it leads to a weak generalization of Einstein gravity. The generalization of geometry goes back to Weyl’s proposal of 1918; the generalization of gravity was proposed by Omote, Utiyama, Dirac and others in the 1970s. Here we reconsider the conceptual potential of this approa...

2002
ANIRUDH PRADHAN

Several modification of Einstein’s general relativity have been proposed and extensively studied so far by many cosmologists to unify gravitation and many other effects in the universe. Barber 1 has produced two continuous self-creation theories by modifying the Brans-Dicke theory and general relativity. The modified theories create the universe out of self-contained gravitational and matter fi...

1997
Stephen Parke

The top quark, the W-boson and the Higg boson form an interesting triptych of elementary particles. In the Standard Model knowing the mass of two of these particles, usually the top quark and W-boson, we can predict the mass of the third, the Higgs boson. Therefore in this proceedings I will primarily cover the following topics, top quark physics, W-boson mass and the light Higgs boson at the p...

2012
Tian Ma Shouhong Wang TIAN MA SHOUHONG WANG

The main motivation of this article is to try to address such questions as why our universe is as it is from the smallest elementary particles to stars, galaxies and the largest cosmos. We attempt to offer our view on this fundamental problem by introducing energy levels for leptons and quarks as well as for hadrons, and by exploring both essential characteristics of four forces derived using t...

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