Lorentz violating field theories and nonperturbative physics
... The coefficients need not be diagonal in flavor space either. Like neutrino masses, they may mix different species. In fact, three-parameter Lorentz-violating models can explain all observed neutrino oscillations (including LSND). However, many possible parameters have not been probed. The “full” n ...
... The coefficients need not be diagonal in flavor space either. Like neutrino masses, they may mix different species. In fact, three-parameter Lorentz-violating models can explain all observed neutrino oscillations (including LSND). However, many possible parameters have not been probed. The “full” n ...
some aspects of strange matter : stars and strangelets
... Moseley, Rutherford and others, the existence of protons as constituent particles was confirmed (1913 1919). Experiments involved anode rays, Xrays and scattering of α particles. Thereafter the conflict of atomic mass with the number of protons for various nuclei gave rise to the idea of a ne ...
... Moseley, Rutherford and others, the existence of protons as constituent particles was confirmed (1913 1919). Experiments involved anode rays, Xrays and scattering of α particles. Thereafter the conflict of atomic mass with the number of protons for various nuclei gave rise to the idea of a ne ...
Standard A
... positively charged alpha particles through a thin piece of gold foil. He expected the alpha particles to pass straight through or get struck in the positive part. Instead most alpha particles passed straight through but a few were deflected or bounced straight back. This lead to the conclusion that ...
... positively charged alpha particles through a thin piece of gold foil. He expected the alpha particles to pass straight through or get struck in the positive part. Instead most alpha particles passed straight through but a few were deflected or bounced straight back. This lead to the conclusion that ...
Charged Particles in Magnetic Fields
... Suppose a particle with charge q and mass m moves with velocity vector v. If a force F acts in the same direction as the velocity v then the particle continues to move in the same direction, but it speeds up. This is what an electric field can do to charged particles. We can describe it a bit differ ...
... Suppose a particle with charge q and mass m moves with velocity vector v. If a force F acts in the same direction as the velocity v then the particle continues to move in the same direction, but it speeds up. This is what an electric field can do to charged particles. We can describe it a bit differ ...
ParticleZoo
... The quark model represents a relatively simple picture of the internal structure of subatomic particles and makes predictions of their production and decay. It uses a minimum of adjusted quark parameters and has great predictive power, e.g., for the composite-particle masses, magnetic moments, and l ...
... The quark model represents a relatively simple picture of the internal structure of subatomic particles and makes predictions of their production and decay. It uses a minimum of adjusted quark parameters and has great predictive power, e.g., for the composite-particle masses, magnetic moments, and l ...
Exercise Sheet 1 to Particle Physics I
... Γ = τ −1 ) of the neutron (n), muon (µ− ), the pions (π +,−,0 ) and the rho meson (ρ). Search through the PDG particle listings to get the information. Compare the results with the masses of these particles. Think of what one may learn from the numbers? 3) Yukawa hypothesized a so-called meson parti ...
... Γ = τ −1 ) of the neutron (n), muon (µ− ), the pions (π +,−,0 ) and the rho meson (ρ). Search through the PDG particle listings to get the information. Compare the results with the masses of these particles. Think of what one may learn from the numbers? 3) Yukawa hypothesized a so-called meson parti ...
Conception of Generations
... Rochester and Butler14) observed two decay events in a cloud chamber experiment on the ground level. One of them was identified as a decay of a neutral particle and the other as that of a charged one. It was just the time when pions started to be identified and the time was not yet ripe to identify th ...
... Rochester and Butler14) observed two decay events in a cloud chamber experiment on the ground level. One of them was identified as a decay of a neutral particle and the other as that of a charged one. It was just the time when pions started to be identified and the time was not yet ripe to identify th ...
Inverse b Processes and Nonconservation
... from the corresponding antiparticle. It was noted that neutrino may be such a particle mixture and consequently that there is a possibility of real transitions neutrino antineutrino in vacuum, provided that the lepton (neutrino) charge [3] is not conserved. In the present note we consider in more ...
... from the corresponding antiparticle. It was noted that neutrino may be such a particle mixture and consequently that there is a possibility of real transitions neutrino antineutrino in vacuum, provided that the lepton (neutrino) charge [3] is not conserved. In the present note we consider in more ...
efectos de la presión hidrostática sobre la energía de enlace para
... FLAVOUR VIOLATING CHARGED LEPTON DECAYS The set of Yukawa interactions induced by the right-handed neutrinos and ...
... FLAVOUR VIOLATING CHARGED LEPTON DECAYS The set of Yukawa interactions induced by the right-handed neutrinos and ...
QuestionSheet
... For each invalid process, give a reason why this is so. For each valid process, draw at least one Feynman diagram to illustrate it. At a given interaction energy, how would you expect the annihilation rates to compare for the different valid processes ? 4. In electron positron colliders, leptons sca ...
... For each invalid process, give a reason why this is so. For each valid process, draw at least one Feynman diagram to illustrate it. At a given interaction energy, how would you expect the annihilation rates to compare for the different valid processes ? 4. In electron positron colliders, leptons sca ...
Section 25.2 Name_____________________
... Nuclei with too many neutrons undergo ______________ emission as neutrons are converted to protons and give off a high-speed electron. A ____________________ is a particle with a positive charge and the mass of an electron. Every radioisotope decays at a characteristic _______________. A ___________ ...
... Nuclei with too many neutrons undergo ______________ emission as neutrons are converted to protons and give off a high-speed electron. A ____________________ is a particle with a positive charge and the mass of an electron. Every radioisotope decays at a characteristic _______________. A ___________ ...
The list of publications
... the neutrinoless double в-process, it means that neutrino is a Majorana particle, and that the total lepton number is not conserved. In this master degree thesis we consider the possibility of the resonant neutrinoless double electron capture by nuclide 124Xe. The main parameter determining the poss ...
... the neutrinoless double в-process, it means that neutrino is a Majorana particle, and that the total lepton number is not conserved. In this master degree thesis we consider the possibility of the resonant neutrinoless double electron capture by nuclide 124Xe. The main parameter determining the poss ...
Law of Conservation of Muons
... This argument therefore leads directly to a multiplicative conservation law of "muon parity. If no particular model is assumed for the weak interactions, no stronger, additive, conservation law is implied. Of course, we cannot rule out the possibility that there is an additive quantum number, which ...
... This argument therefore leads directly to a multiplicative conservation law of "muon parity. If no particular model is assumed for the weak interactions, no stronger, additive, conservation law is implied. Of course, we cannot rule out the possibility that there is an additive quantum number, which ...
subatomic particle
... How to detect neutrinos? • Their existence was inferred by Pauli in 1930. Without neutrinos, radioactive decays would not conserve energy or momentum. • The 2002 Physics Nobel prize to Davis & Koshiba was for detecting neutrinos emitted by fusion in our sun. ...
... How to detect neutrinos? • Their existence was inferred by Pauli in 1930. Without neutrinos, radioactive decays would not conserve energy or momentum. • The 2002 Physics Nobel prize to Davis & Koshiba was for detecting neutrinos emitted by fusion in our sun. ...
Lepton
A lepton is an elementary, half-integer spin (spin 1⁄2) particle that does not undergo strong interactions, but is subject to the Pauli exclusion principle. The best known of all leptons is the electron, which is directly tied to all chemical properties. Two main classes of leptons exist: charged leptons (also known as the electron-like leptons), and neutral leptons (better known as neutrinos). Charged leptons can combine with other particles to form various composite particles such as atoms and positronium, while neutrinos rarely interact with anything, and are consequently rarely observed.There are six types of leptons, known as flavours, forming three generations. The first generation is the electronic leptons, comprising the electron (e−) and electron neutrino (νe); the second is the muonic leptons, comprising the muon (μ−) and muon neutrino (νμ); and the third is the tauonic leptons, comprising the tau (τ−) and the tau neutrino (ντ). Electrons have the least mass of all the charged leptons. The heavier muons and taus will rapidly change into electrons through a process of particle decay: the transformation from a higher mass state to a lower mass state. Thus electrons are stable and the most common charged lepton in the universe, whereas muons and taus can only be produced in high energy collisions (such as those involving cosmic rays and those carried out in particle accelerators).Leptons have various intrinsic properties, including electric charge, spin, and mass. Unlike quarks however, leptons are not subject to the strong interaction, but they are subject to the other three fundamental interactions: gravitation, electromagnetism (excluding neutrinos, which are electrically neutral), and the weak interaction. For every lepton flavor there is a corresponding type of antiparticle, known as antilepton, that differs from the lepton only in that some of its properties have equal magnitude but opposite sign. However, according to certain theories, neutrinos may be their own antiparticle, but it is not currently known whether this is the case or not.The first charged lepton, the electron, was theorized in the mid-19th century by several scientists and was discovered in 1897 by J. J. Thomson. The next lepton to be observed was the muon, discovered by Carl D. Anderson in 1936, which was classified as a meson at the time. After investigation, it was realized that the muon did not have the expected properties of a meson, but rather behaved like an electron, only with higher mass. It took until 1947 for the concept of ""leptons"" as a family of particle to be proposed. The first neutrino, the electron neutrino, was proposed by Wolfgang Pauli in 1930 to explain certain characteristics of beta decay. It was first observed in the Cowan–Reines neutrino experiment conducted by Clyde Cowan and Frederick Reines in 1956. The muon neutrino was discovered in 1962 by Leon M. Lederman, Melvin Schwartz and Jack Steinberger, and the tau discovered between 1974 and 1977 by Martin Lewis Perl and his colleagues from the Stanford Linear Accelerator Center and Lawrence Berkeley National Laboratory. The tau neutrino remained elusive until July 2000, when the DONUT collaboration from Fermilab announced its discovery.Leptons are an important part of the Standard Model. Electrons are one of the components of atoms, alongside protons and neutrons. Exotic atoms with muons and taus instead of electrons can also be synthesized, as well as lepton–antilepton particles such as positronium.