Leptons and quarks

Part 1 book "Introduction to particle physics" includes content: Overview, symmetry and conservation law, the classification and properties of particles - lepton and hadron, isospin and g-parity, quark model of hadrons, electromagnetic interaction, weak interactions.

265p muasambanhan09 16-03-2024 4 1   Download

Part 3 book "Fundamentals of physics" includes content: Induction and inductance, electromagnetic oscillations and alternating current, Maxwell’s equations - Magnetism of matter, electromagnetic waves, images, interference, diffraction, relativity, photons and matter waves, more about matter waves, all about atoms, conduction of electricity in solids, nuclear physics, energy from the nucleus, quarks, leptons, and the big bang.

562p muasambanhan08 01-03-2024 7 1   Download

Part 3 book "Fundamentals of physics" includes content: Induction and inductance; electromagnetic oscillations and alternating current; Maxwell’s equations - magnetism of matter; electromagnetic waves; images; interference; diffraction; relativity; photons and matter waves; more about matter waves; all about atoms; conduction of electricity in solids; nuclear physics; energy from the nucleus; quarks, leptons, and the big bang.

561p muasambanhan06 03-02-2024 2 1   Download

This paper investigate an extension of the standard model with vector-like fermions and an extra Abelian gauge symmetry. The particle mass spectrum is calculated explicitly. The Lagrangian terms for all the gauge interactions of leptons and quarks in the model are derived. Observe that while there is no new mixing in the lepton sector, the quark mixing plays an important role in the magnitudes of gauge interactions for quarks, particularly the interactions with massive W, Z and Z0 bosons.

14p nguyenxuankha_bevandan 14-08-2020 11 1   Download

The squareness factor γ, defined as the ratio BHc/iHc, plays very importance role. This factor reflects the magnetization process under a reversed magnetic field in magnet. So the factor γ can be used as the critical parameter for estimating the magnet quality. For the powder compaction of 6.48 g/cm3 mass density, if γ is less than 0.48 then the preparation conditions were far from the optimal ones. The value higher than 0.48 of factor γ proves that in prepared powder the coupling between grains is enhanced.

6p 12120609 01-06-2020 9 0   Download

Axion in PQWW model and axion production in e+e− collision Properties of the axion in PQWW model is considered. In this model, axion appears as a new phase of the Higgs field. From a general Higgs potential which is renormalizable and invariant under UPQ(1) transformation, we consider the interaction of the axion with leptons and quarks. Based on these results, axion production in e+e− collision is calculated in detail. The numerical evaluation shows that the axion can be detected in experimental conditions.

5p 12120609 01-06-2020 10 0   Download

This work is devoted for gauge boson sector of the recently proposed model based on SU(3)C ⊗ SU(3)L ⊗ U(1)X group with minimal content of leptons and Higgses. The limits on the masses of the bilepton gauge bosons and on the mixing angle among the neutral ones are deduced. Using the Fritzsch anzats on quark mixing, we show that the third family of quarks should be different from the first two. We obtain a lower bound on mass of the new heavy neutral gauge boson as 4.032 TeV. Using data on branching decay rates of the Z boson, we can fix the limit to the Z and Z 0 mixing angle φ as −0.

16p thuyliebe 09-10-2018 36 0   Download