Quantum Reality
... If one boson is in a particular quantum state, all other bosons are "invited in" to share the same state. The more bosons that pile into the state, the stronger becomes the tendency for others to join them. In such a state, a very large number of particle will have a single quantum ...
... If one boson is in a particular quantum state, all other bosons are "invited in" to share the same state. The more bosons that pile into the state, the stronger becomes the tendency for others to join them. In such a state, a very large number of particle will have a single quantum ...
subatomic particle
... • 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. ...
... • 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. ...
Concepts of Modern Physics Presentations
... SPH4U: Concepts of Modern Physics Presentations Guidelines: You will choose a topic in modern physics from the list below. Each topic is a basic concept or idea in modern physics (related to quantum mechanics, general relativity, particle physics, or theories of everything) You will be allotted 10 m ...
... SPH4U: Concepts of Modern Physics Presentations Guidelines: You will choose a topic in modern physics from the list below. Each topic is a basic concept or idea in modern physics (related to quantum mechanics, general relativity, particle physics, or theories of everything) You will be allotted 10 m ...
Explaining matter/antimatter asymmetries
... expressions for particle masses. In quantum mechanics, a massive particle is a quantum state, which may be a mixture of some more basic states. CP violation results from such mixing, when the mixing amplitudes are complex numbers with different phases. But which specific particles give the CP violat ...
... expressions for particle masses. In quantum mechanics, a massive particle is a quantum state, which may be a mixture of some more basic states. CP violation results from such mixing, when the mixing amplitudes are complex numbers with different phases. But which specific particles give the CP violat ...
The Standard Model - Stony Brook University
... atomic nuclei, and your physics and chemistry teachers talk about them a lot. ...
... atomic nuclei, and your physics and chemistry teachers talk about them a lot. ...
Search for Heavy, Long-Lived Neutral Particles that Decay to
... versions of Supersymmetry, and even be produced as the decay of a Higgs boson. Since the photons that may have come from such events will arrive at the surface of the detector later than photons produced directly from the primary collision, they can be separated in time and analyzed for significance ...
... versions of Supersymmetry, and even be produced as the decay of a Higgs boson. Since the photons that may have come from such events will arrive at the surface of the detector later than photons produced directly from the primary collision, they can be separated in time and analyzed for significance ...
212 Particle Physics Lecture 1 - X-ray and Observational Astronomy
... An elementary particle is a point particle without structure that is not constructed from more elementary entities With the advent of particle accelerator in the 1950’s many new elementary particles were discovered. The question arose whether perhaps there were too many to all be elementary. ...
... An elementary particle is a point particle without structure that is not constructed from more elementary entities With the advent of particle accelerator in the 1950’s many new elementary particles were discovered. The question arose whether perhaps there were too many to all be elementary. ...
Classification of the Elementary Particles
... integral spins are called fermions while mesons with zero or integral spins are called bosons. Thus the muon (m meson) is really a lepton with spin 1/2 and therefore a fermion , whereas the photon is a fundamental boson with spin 1. Based on these definitions it is possible to classify some 32 of th ...
... integral spins are called fermions while mesons with zero or integral spins are called bosons. Thus the muon (m meson) is really a lepton with spin 1/2 and therefore a fermion , whereas the photon is a fundamental boson with spin 1. Based on these definitions it is possible to classify some 32 of th ...
Particle Physics
... with determinant one). How many such matrices are there? Eight! (The Gell-Mann matrices.) There are therefore eight force particles for the strong force, gluons : ...
... with determinant one). How many such matrices are there? Eight! (The Gell-Mann matrices.) There are therefore eight force particles for the strong force, gluons : ...
Evolution of the Atomic Theory
... • 1. a large majority of alpha particles passed directly through the foil. • 2. few particles were deflected when shot at the foil. • 3. rarely, one particle would come back almost directly at the alpha source ...
... • 1. a large majority of alpha particles passed directly through the foil. • 2. few particles were deflected when shot at the foil. • 3. rarely, one particle would come back almost directly at the alpha source ...
From the last time… - UW High Energy Physics
... • The first string excitation is a particle with imaginary mass — a tachyon (negative mass squared = negative energy) – Could go backwards in time: seems unlikely! ...
... • The first string excitation is a particle with imaginary mass — a tachyon (negative mass squared = negative energy) – Could go backwards in time: seems unlikely! ...
History of Particle Physics (lecture notes)
... Since then the Standard Model has gone from triumph to triumph. The Cabibbo-‐Kobayashi-‐Maskawa theory of CP violation anticipated the existence of a third family -‐ an anticipation eventually fulfilled ...
... Since then the Standard Model has gone from triumph to triumph. The Cabibbo-‐Kobayashi-‐Maskawa theory of CP violation anticipated the existence of a third family -‐ an anticipation eventually fulfilled ...
Heisenburg uncertainty principle
... Scientists are trying to find a “Theory of Everything” which can connect General Relativity (the current theory of gravity) to the other 3 forces There is no accepted Theory of Everything ...
... Scientists are trying to find a “Theory of Everything” which can connect General Relativity (the current theory of gravity) to the other 3 forces There is no accepted Theory of Everything ...
UvA-DARE (Digital Academic Repository)
... As mentioned above, all matter consists only of quarks and leptons. All detectable matter that is. In 1980 measurements of velocity curves in spiral galaxies first showed that there is much more matter in such galaxies than can be accounted for by direct observation2 [4]. At this moment the amount o ...
... As mentioned above, all matter consists only of quarks and leptons. All detectable matter that is. In 1980 measurements of velocity curves in spiral galaxies first showed that there is much more matter in such galaxies than can be accounted for by direct observation2 [4]. At this moment the amount o ...
e - X-ray and Observational Astronomy Group
... Leptons interact through weak interactions, but not via the strong force. All leptons have spin of 1/2. There are six kinds of lepton: electron e-, muon m-, and tau t -, and 3 neutrinos ne, nm, nt ...
... Leptons interact through weak interactions, but not via the strong force. All leptons have spin of 1/2. There are six kinds of lepton: electron e-, muon m-, and tau t -, and 3 neutrinos ne, nm, nt ...
Chapter 29 - Wayne State University Physics and Astronomy
... force, an interaction between colored quarks is the result of color force – 8 colored gluons. The general theory is complex but explains experimental results better. Numerical results can be very hard to calculate Opposite colors attract, red-antired, in analogy with electromagnetism. Different colo ...
... force, an interaction between colored quarks is the result of color force – 8 colored gluons. The general theory is complex but explains experimental results better. Numerical results can be very hard to calculate Opposite colors attract, red-antired, in analogy with electromagnetism. Different colo ...
Standard Model
The Standard Model of particle physics is a theory concerning the electromagnetic, weak, and strong nuclear interactions, as well as classifying all the subatomic particles known. It was developed throughout the latter half of the 20th century, as a collaborative effort of scientists around the world. The current formulation was finalized in the mid-1970s upon experimental confirmation of the existence of quarks. Since then, discoveries of the top quark (1995), the tau neutrino (2000), and more recently the Higgs boson (2013), have given further credence to the Standard Model. Because of its success in explaining a wide variety of experimental results, the Standard Model is sometimes regarded as a ""theory of almost everything"".Although the Standard Model is believed to be theoretically self-consistent and has demonstrated huge and continued successes in providing experimental predictions, it does leave some phenomena unexplained and it falls short of being a complete theory of fundamental interactions. It does not incorporate the full theory of gravitation as described by general relativity, or account for the accelerating expansion of the universe (as possibly described by dark energy). The model does not contain any viable dark matter particle that possesses all of the required properties deduced from observational cosmology. It also does not incorporate neutrino oscillations (and their non-zero masses).The development of the Standard Model was driven by theoretical and experimental particle physicists alike. For theorists, the Standard Model is a paradigm of a quantum field theory, which exhibits a wide range of physics including spontaneous symmetry breaking, anomalies, non-perturbative behavior, etc. It is used as a basis for building more exotic models that incorporate hypothetical particles, extra dimensions, and elaborate symmetries (such as supersymmetry) in an attempt to explain experimental results at variance with the Standard Model, such as the existence of dark matter and neutrino oscillations.