The Colt line now includes a new scattergun, the Standard or Custom Pump Model ( about $90 and $150, respectively ) in 12, 16 and 20.

* Alain Connes ' Standard Model

In the Standard Model of physics, electrons are truly elementary particles with no internal structure.

Dark energy in its simplest formulation takes the form of the cosmological constant term in Einstein's field equations of general relativity, but its composition and mechanism are unknown and, more generally, the details of its equation of state and relationship with the Standard Model of particle physics continue to be investigated both observationally and theoretically.

Precise modern models of the Big Bang appeal to various exotic physical phenomena that have not been observed in terrestrial laboratory experiments or incorporated into the Standard Model of particle physics.

Within the prevailing Standard Model of particle physics, the number of baryons may change in multiples of three due to the action of sphalerons, although this is rare and has not been observed under experiment.

In the 1950s – 1970s, Caltech was the home of Murray Gell-Mann and Richard Feynman, whose work was central to the establishment of the Standard Model of particle physics.

* Conservation of lepton number ( In the Standard Model )

In the Standard Model, the

The Standard Model of elementary particles, with the fermions in the first three columns and the gauge bosons in the fourth column.

Standard Model of elementary particles

In the Standard Model of particle physics, the elementary particles include the fundamental fermions ( including quarks, leptons, and their antiparticles ), and the fundamental bosons ( including gauge bosons and the Higgs boson ).

According to the Standard Model, all elementary particles are either bosons or fermions ( depending on their spin ).

Such particles lie beyond the Standard Model.

The Standard Model of particle physics contains 12 flavors of elementary fermions, plus their corresponding antiparticles, as well as elementary bosons that mediate the forces and the Higgs boson, which was reported on July 4th, 2012, as having been likely detected by the two main experiments at the LHC ( ATLAS and CMS ).

However, the Standard Model is widely considered to be a provisional theory rather than a truly fundamental one, since it is not known if it is compatible with Einstein's general relativity.

There may be hypothetical elementary particles not described by the Standard Model, such as the graviton, the particle that would carry the gravitational force, and sparticles, supersymmetric partners of the ordinary particles.

Gravitons are postulated because of the great success of quantum field theory ( in particular, the Standard Model ) at modeling the behavior of all other known forces of nature as being mediated by elementary particles: electromagnetism by the photon, the strong interaction by the gluons, and the weak interaction by the W and Z bosons.

In contrast, the Standard Model is not background independent, with Minkowski space enjoying a special status as the fixed background space-time.

Attempts to extend the Standard Model or other quantum field theories by adding gravitons run into serious theoretical difficulties at high energies ( processes involving energies close to or above the Planck scale ) because of infinities arising due to quantum effects ( in technical terms, gravitation is nonrenormalizable ).

A Grand Unified Theory, ( GUT ), is a model in particle physics in which at high energy, the three gauge interactions of the Standard Model which define the electromagnetic, weak, and strong interactions, are merged into one single interaction characterized by one larger gauge symmetry and thus one unified coupling constant.

In contrast, the experimentally verified Standard Model of particle physics is based on three independent interactions, symmetries and coupling constants.

, all GUT models which aim to be completely realistic are quite complicated, even compared to the Standard Model, because they need to introduce additional fields and interactions, or even additional dimensions of space.

The fact that the electric charges of electrons and protons seem to cancel each other exactly to extreme precision is essential for the existence of the macroscopic world as we know it, but this important property of elementary particles is not explained in the Standard Model of particle physics.

The Standard Model of particle physics recognizes three kinds of gauge bosons: Photons, which carry the electromagnetic interaction ; W and Z bosons, which carry the weak interaction ; and gluons, which carry the strong interaction.

* Standard Seven: The student who contributes positively to the learning community and to society is information literate and recognizes the importance of information to a democratic society.

The American Standard of Perfection recognizes three Brahma varieties: light, dark, and buff.

High Standard has also added two models to its line.

`` Standard years -- eighty-four years, seven months, three days, two hours, eleven and one half minutes.

Received Pronunciation ( RP ) refers to a way of pronouncing Standard English that is actually used by about two percent of the UK population.

The group is usually divided into two sub-groups: Western Baltic, containing only extinct languages, and Eastern Baltic, containing both extinct and the two living languages in the group: Lithuanian ( including both Standard Lithuanian and Samogitian ) and Latvian ( including both literary Latvian and Latgalian ).

Some of the masterpieces include the ' Standard of Ur ', the ' Ram in a Thicket ', the ' Royal Game of Ur ', and two bull-headed lyres.

According to ANSI Standard 1100, a professional certifying organization must meet two requirements:

Standard CDs are available in two sizes.

Standard Danish has two genders and the definite form of nouns is formed by the use of suffixes, while Western Jutlandic has only one gender and the definite form of nouns uses an article before the noun itself, in the same fashion as West Germanic languages.

The most common tuning, known as " Standard Tuning ," has the strings tuned from a low E, to a high E, traversing a two octave range — EADGBE.

As part of school work, Blair wrote two poems that were published in the Henley and South Oxfordshire Standard, He came second to Connolly in the Harrow History Prize, had his work praised by the school's external examiner, and earned scholarships to Wellington and Eton Colleges.

The latter two are phonetically indistinguishable ; in writing, capitalization differs: " Ich war am essen " vs. " Ich war am Essen " ( I was eating, compared to the Standard German approximation: " Ich war beim Essen "); yet these forms are not standardized and thus are relatively infrequently written down or printed, even in quotations or direct speech.

The IESG can reclassify an old Draft Standard as Proposed Standard after two years ( October 2013 ).

A specification for which at least two independent and interoperable implementations and successful operational experience has been obtained may be elevated to the Internet Standard level.

MySQL Workbench is available in two editions, the regular free and open source Community Edition which may be downloaded from the MySQL website, and the proprietary Standard Edition which extends and improves the feature set of the Community Edition.

In 1940, under the pen-name " Cato " he and two other Beaverbrook journalists ( Frank Owen, editor of the Standard, and Peter Howard of the Daily Express ) published Guilty Men, a Left Book Club book attacking the appeasement policy of the Chamberlain government that became a run-away best-seller.

The C ++' s Standard Template Library has the function, which merges two sorted ranges of iterators, and, which merges two consecutive sorted ranges in-place.

Today there are several languages in the ML family ; the two major dialects are Standard ML ( SML ) and Caml, but others exist, including F # — a language that Microsoft supports for their. NET platform.

The standard library has two modules ( itertools and functools ) that implement functional tools borrowed from Haskell and Standard ML.

According to The Unicode Standard, plain text has two main properties in regard to rich text:

Industrial, mining, and other uses of mercury have resulted in a widespread distribution in the bay, with uptake in the bay's phytoplankton and contamination of its sportfish. In January 1971, two Standard Oil tankers collided in the bay, creating an 800, 000 gallon oil spill disaster, which spurred environmental protection of the bay.