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We consider a quark-lepton symmetry model of unification of the strong and electromagnetic interactions. The model has the gauge group $SU(4)\times U(1)_{Y}$ and the minimal Higgs structure consisting of one complex quartet of scalar…

High Energy Physics - Phenomenology · Physics 2009-04-09 E. K. Loginov

Despite its role in the continuing evolution of the Universe, only a small fraction of the mass of visible material can be attributed to the Higgs boson alone. The overwhelmingly dominant share may/should arise from the strong interactions…

High Energy Physics - Phenomenology · Physics 2024-03-11 K. Raya , A. Bashir , D. Binosi , C. D. Roberts , J. Rodríguez-Quintero

A model is presented of the leptons, quarks and bosons as non-elementary particles being composed of spinons. They are defined as massless fermions obeying the Weyl equations, but in addition are charged and assumed to have two internal…

General Physics · Physics 2019-08-27 Eckart Marsch

The weak bosons, leptons and quarks are considered as composite particles. The interaction of the constituents is a confining gauge interaction. The standard electroweak model is a low energy approximation. The mixing of the neutral weak…

High Energy Physics - Phenomenology · Physics 2010-11-05 Harald Fritzsch

Atomic nuclei lie at the core of everything visible; and at the first level of approximation, their atomic weights are simply the sum of the masses of all the neutrons and protons (nucleons) they contain. Each nucleon has a mass $m_N…

High Energy Physics - Phenomenology · Physics 2023-05-03 Craig D. Roberts

The nucleons (protons and neutrons) are by far the most abundant form of matter in our visible Universe; they are composite particles made of quarks and gluons, the fundamental quanta of Quantum Chromo Dynamics (QCD). The usual…

High Energy Physics - Phenomenology · Physics 2020-08-17 Mauro Anselmino , Asmita Mukherjee , Anselm Vossen

A nucleus is a quantum many body system made of strongly interacting Fermions, protons and neutrons (nucleons). This produces a rich Nuclear Equation of State whose knowledge is crucial to our understanding of the composition and evolution…

Nuclear Theory · Physics 2014-03-07 G. Giuliani , H. Zheng , A. Bonasera

The quark masses evaluated by the Particle Data Group are consistent with terms in a geometric progression of mass values descending from the Planck Mass. The common ratio of the sequence is 2/pi. The quarks occupy the 'principal' levels of…

General Physics · Physics 2007-05-23 B. F. Riley

In this chapter we give a pedagogical introduction to the constituent quark model. The explanation of magnetic moments of the nucleons was crucial to introduce an effective quark mass for light quarks that nowadays are understood as an…

High Energy Physics - Phenomenology · Physics 2025-04-11 D. R. Entem , F. Fernández , P. G. Ortega , J. Segovia

Quarks and gluons are the fundamental constituents of nucleons. Their interactions rather than their mass, is responsible for $99\%$ of the mass of all visible matter in the universe. Measuring the fundamental properties of matter has had a…

Nuclear Experiment · Physics 2019-05-06 Astrid Morreale

We note that in general there exist two basic aspects in any branch of physics, including cosmology - one dealing with the attributes of basic constituents and forces of nature, the other dealing with how structures arise from them and how…

General Relativity and Quantum Cosmology · Physics 2007-05-23 B. L. Hu

We introduce the standard model of elementary particles and discuss the reasons why we have to modify it. Emphasis is put on the indications from the neutrinos and on the role of the Higgs particle; some promising theoretical ideas, like…

High Energy Physics - Phenomenology · Physics 2007-05-23 Francesco Vissani

The standard model of elementary interactions has long qualified as a theory of matter, in which the postulated conservation laws (one baryonic and three leptonic) acquire theoretical meaning. However, recent observations of lepton number…

High Energy Physics - Phenomenology · Physics 2021-03-05 Francesco Vissani

If the preon structure of quarks, leptons and gauge bosons will be proved then in the Universe during relativistic phase transition the production of nonperturbative preon condensates has been occured collective excitations of which are…

High Energy Physics - Phenomenology · Physics 2009-09-25 V. Burdyuzha , O. Lalakulich , Yu. Ponomarev , G. Vereshkov

Extension of particle symmetry implies new conserved charges and the lightest particles, possessing such charges, should be stable. Created in early Universe, stable charged heavy leptons and quarks can exist and, hidden in elusive atoms…

Astrophysics · Physics 2007-05-23 Maxim Yu. Khlopov

One of the key assumptions of the Standard Model of fundamental particles is that the interactions of the charged leptons, namely electrons, muons, and taus, differ only because of their different masses. While precision tests have not…

High Energy Physics - Experiment · Physics 2018-12-05 Vera Lüth

In the 1930's, nuclear physicists developed the first realistic atomic models, showing that nuclei were made up of protons and neutrons. In the 1960's, Deep Inelastic Scattering experiments showed that protons and neutrons had internal…

High Energy Physics - Experiment · Physics 2019-10-30 Spencer R. Klein , Heikki Mantysaari

Dark matter is a fundamental constituent of the universe, which is needed to explain a wide variety of astrophysical and cosmological observations. Although the existence of dark matter was first postulated nearly a century ago and its…

Cosmology and Nongalactic Astrophysics · Physics 2025-09-23 Csaba Balazs , Torsten Bringmann , Felix Kahlhoefer , Martin White

A number of characteristics of the new fundamental interaction are described. The interaction is carried by a massless pseudoscalar boson and extends to at least the electron neutrino, proton, and neutron. A substantiation of the existence…

High Energy Physics - Phenomenology · Physics 2021-06-22 L. M. Slad

We set out a fundamental ontology of atomism in terms of matter points. While being most parsimonious, this ontology is able to match both classical and quantum mechanics, and it remains a viable option for any future theory of cosmology…

History and Philosophy of Physics · Physics 2015-10-14 Michael Esfeld , Dirk-André Deckert , Andrea Oldofredi