Lecture notes
... • These are supposed to be suppressed by some high mass scale • But all high mass scales present in any RS Lagrangian are warped down to the TeV scale. • ⇒ There is no mechanism to suppress these dangerous operators! • Could employ discrete symmetries ala SUSY – but there is a more elegant solution… ...
... • These are supposed to be suppressed by some high mass scale • But all high mass scales present in any RS Lagrangian are warped down to the TeV scale. • ⇒ There is no mechanism to suppress these dangerous operators! • Could employ discrete symmetries ala SUSY – but there is a more elegant solution… ...
String Theory
... String Theory is believed to bridge the gap between General Relativity and Quantum Mechanics This is because Relativistic Quantum Field Theory only works when gravity is ignored (very weak) General Relativity only works when we can assume the universe can be described by classical physics (no quantu ...
... String Theory is believed to bridge the gap between General Relativity and Quantum Mechanics This is because Relativistic Quantum Field Theory only works when gravity is ignored (very weak) General Relativity only works when we can assume the universe can be described by classical physics (no quantu ...
History of the Atom File
... centimeter in diameter, then the electrons and quarks would be less than the diameter of a hair and the entire atom's diameter would be greater than the length of thirty football fields! 99.999999999999% of an atom's volume is just empty space! ...
... centimeter in diameter, then the electrons and quarks would be less than the diameter of a hair and the entire atom's diameter would be greater than the length of thirty football fields! 99.999999999999% of an atom's volume is just empty space! ...
pptx file - Northwestern University
... (electromagnetic, weak & strong – not gravity). • The Higgs field is special – it gives mass. 7 - November - 2012 ...
... (electromagnetic, weak & strong – not gravity). • The Higgs field is special – it gives mass. 7 - November - 2012 ...
ALICE Poster
... The ALICE Collaboration is building a dedicated heavy-ion detector to exploit the unique physics potential of nucleus-nucleus interactions at LHC energies. Our aim is to study the physics of strongly interacting matter at extreme energy densities, where the formation of a new phase of matter, the qu ...
... The ALICE Collaboration is building a dedicated heavy-ion detector to exploit the unique physics potential of nucleus-nucleus interactions at LHC energies. Our aim is to study the physics of strongly interacting matter at extreme energy densities, where the formation of a new phase of matter, the qu ...
The Standard Model of Particle Physics Piet Mulders
... • Oscillations arise because the interaction of ne with matter differs from the interaction of nm (ne ‘feels’ electrons, nm doesn’t!) • SNO showed that what is missing on ne appears as a different kind of neutrino • Most probably these are oscillations of the type ne nm ...
... • Oscillations arise because the interaction of ne with matter differs from the interaction of nm (ne ‘feels’ electrons, nm doesn’t!) • SNO showed that what is missing on ne appears as a different kind of neutrino • Most probably these are oscillations of the type ne nm ...
non-relativistic Breit
... create a beam of neutrinos which is well enough focused. Instead at LEP2 (1996–2000) they used the processes e+ e− → W + W − (exchanging a neutrino) and e+ e− → Z ⋆ /γ ⋆ → W + W − (via an off-shell Z 0 or γ). The latter uses the fact that SU (2) is a non-abelian theory so that we have terms in the L ...
... create a beam of neutrinos which is well enough focused. Instead at LEP2 (1996–2000) they used the processes e+ e− → W + W − (exchanging a neutrino) and e+ e− → Z ⋆ /γ ⋆ → W + W − (via an off-shell Z 0 or γ). The latter uses the fact that SU (2) is a non-abelian theory so that we have terms in the L ...
Fundamental Physics - Physics Seminar
... • The Standard Model has many free parameters: O(30) • Naturalness problems. Finetuning. Examples: Higgs mass, θ-angle (strong CP-problem) • Gravity separate, i.e. not unified. ...
... • The Standard Model has many free parameters: O(30) • Naturalness problems. Finetuning. Examples: Higgs mass, θ-angle (strong CP-problem) • Gravity separate, i.e. not unified. ...
Fundamental Particles
... • For centuries, scientists searched for the fundamental particles of matter and the “glue” that holds them together. At first, scientists thought that atoms were the fundamental particles. Now they know that there are smaller, simpler particles than atoms that make up matter and carry the forces th ...
... • For centuries, scientists searched for the fundamental particles of matter and the “glue” that holds them together. At first, scientists thought that atoms were the fundamental particles. Now they know that there are smaller, simpler particles than atoms that make up matter and carry the forces th ...
Nuclear Physics
... For atomic nuclei, such a symbol can be pronounced and written using the name of the element and its mass number, so C, which is used in carbon dating, is “carbon-14”. For other particles, we use the names listed in the table below (even those whose symbols look like atomic nuclei, such as the deute ...
... For atomic nuclei, such a symbol can be pronounced and written using the name of the element and its mass number, so C, which is used in carbon dating, is “carbon-14”. For other particles, we use the names listed in the table below (even those whose symbols look like atomic nuclei, such as the deute ...
Chapter 30
... are accelerated into it. • When the protons is at the end of one tube, the potential of the second tube is negative with respect to the first tube. • This accelerates the proton into the second tube. • This continues, and the proton keeps accelerating, gaining 105 eV every time. • Linear accelerator ...
... are accelerated into it. • When the protons is at the end of one tube, the potential of the second tube is negative with respect to the first tube. • This accelerates the proton into the second tube. • This continues, and the proton keeps accelerating, gaining 105 eV every time. • Linear accelerator ...
here
... • Our knowledge of the universe spans 45 orders of magnitude. • We are edging into the 46th, exploring the TeV energy scale. • The Standard Model of elementary particles is 50 years old. • It is alive and kicking. • The last missing piece of the SM been found. • The SM is not a complete theory! • We ...
... • Our knowledge of the universe spans 45 orders of magnitude. • We are edging into the 46th, exploring the TeV energy scale. • The Standard Model of elementary particles is 50 years old. • It is alive and kicking. • The last missing piece of the SM been found. • The SM is not a complete theory! • We ...
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.