Phenomenology Beyond the Standard Model
... • No problem if I = J = 0 bosons • Estimate scattering cross section: where: with ...
... • No problem if I = J = 0 bosons • Estimate scattering cross section: where: with ...
Precision EWK - Durham University
... The Higgs mechanism lets us generate a massive W and Z naturally. – This is at a cost of one (not two) extra parameters • Either the Higgs mass or its self-coupling – It leaves the photon massless – It keeps gauge invariance – Weinberg and Salam knew all about this ...
... The Higgs mechanism lets us generate a massive W and Z naturally. – This is at a cost of one (not two) extra parameters • Either the Higgs mass or its self-coupling – It leaves the photon massless – It keeps gauge invariance – Weinberg and Salam knew all about this ...
Future Directions in Particle Physics
... •Dine: one of the first to build models of supersymmetry and consider their phenomenology at accelerators; developed the theory of supersymmetry breaking •Haber: developed the phenomenology of supersymmetry at accelerators in some detail •Banks: models of supersymmetry, supersymmetry breaking, conne ...
... •Dine: one of the first to build models of supersymmetry and consider their phenomenology at accelerators; developed the theory of supersymmetry breaking •Haber: developed the phenomenology of supersymmetry at accelerators in some detail •Banks: models of supersymmetry, supersymmetry breaking, conne ...
Tau_Leptons_in_the_Quest_for_New_Physics
... (it is now generated by the new field) Resolves many of the “naturalness” problems in SUSY ...
... (it is now generated by the new field) Resolves many of the “naturalness” problems in SUSY ...
Summer_Talk_new - University of Toronto, Particle Physics and
... • Three forces never have same strength ...
... • Three forces never have same strength ...
The Standard Model (SM) describes the fundamental particles of the
... not act as a mediating particle for one of the three fundamental forces of the SM is the Higgs boson. The Higgs boson is theoretically responsible for giving mass to other particles through interactions with the Higgs field. Yet to be discovered, the Higgs boson is a major focus of research at the T ...
... not act as a mediating particle for one of the three fundamental forces of the SM is the Higgs boson. The Higgs boson is theoretically responsible for giving mass to other particles through interactions with the Higgs field. Yet to be discovered, the Higgs boson is a major focus of research at the T ...
The Family Problem: Extension of Standard Model with a Loosely
... supersymmetry, we try to think about “why not”, rather than proceeding to speculate. So, in our Universe there is 25% dark matter vs 5% ordinary matter – this is taken as a fact to ...
... supersymmetry, we try to think about “why not”, rather than proceeding to speculate. So, in our Universe there is 25% dark matter vs 5% ordinary matter – this is taken as a fact to ...
shp_09 - Nevis Laboratories
... MW 100 GeV, the measured values of 1/a are rather different: 137, 29, 10. However, their energy dependences suggest that they approach (sort of!) a common value near 1016 GeV. This is an insanely high energy! The Standard Model provides no explanation for what may happen beyond this unification scal ...
... MW 100 GeV, the measured values of 1/a are rather different: 137, 29, 10. However, their energy dependences suggest that they approach (sort of!) a common value near 1016 GeV. This is an insanely high energy! The Standard Model provides no explanation for what may happen beyond this unification scal ...
What is the Higgs? - University of Manchester
... Higgs proposed that empty space (vacuum) is not really empty. Some particles move around unhindered (massless) whilst others are dragged back by the vacuum (massive). In this way the gauge symmetry is more “hidden” rather than “broken”. ...
... Higgs proposed that empty space (vacuum) is not really empty. Some particles move around unhindered (massless) whilst others are dragged back by the vacuum (massive). In this way the gauge symmetry is more “hidden” rather than “broken”. ...
Print/Download as PDF - Youth Science Canada
... City: Shuniah, ON School: Claude E. Garton Abstract: This project is about dark matter and how it could account for the missing gravity needed to hold the galaxies in orbit. No one knows exactly what dark matter is. Some of the possible explanations include MOND, axions, WIMPs, MACHOs, neutrinos and ...
... City: Shuniah, ON School: Claude E. Garton Abstract: This project is about dark matter and how it could account for the missing gravity needed to hold the galaxies in orbit. No one knows exactly what dark matter is. Some of the possible explanations include MOND, axions, WIMPs, MACHOs, neutrinos and ...
PowerPoint ******
... of the Higgs field. The latter constitutes a scalar field, with two neutral and two electrically charged components, and forms a complex doublet of the weak isospin SU(2) symmetry. The field has a "Mexican hat" shaped potential with nonzero strength everywhere (including otherwise empty space), whic ...
... of the Higgs field. The latter constitutes a scalar field, with two neutral and two electrically charged components, and forms a complex doublet of the weak isospin SU(2) symmetry. The field has a "Mexican hat" shaped potential with nonzero strength everywhere (including otherwise empty space), whic ...
LHC Physics - UCL HEP Group
... N.B. Our example here was for a single complex scalar and for a U(1) field. In the Standard Model the Higgs is an electroweak SU(2) doublet field, with 4 degrees of freedom. 3 of these are ‘eaten’ by W±, Z0, mass terms leaving a single scalar for the physical Higgs boson. For full SU(2) treatment se ...
... N.B. Our example here was for a single complex scalar and for a U(1) field. In the Standard Model the Higgs is an electroweak SU(2) doublet field, with 4 degrees of freedom. 3 of these are ‘eaten’ by W±, Z0, mass terms leaving a single scalar for the physical Higgs boson. For full SU(2) treatment se ...
Higgs-Boson-Arraigned
... Critically acclaimed as “the missing piece of the theory of everything” and “the God particle,” the boson seemed humbled and restrained as the Los Angeles County Superior Court read out the charges. It wore a pair of dark Oakley sunglasses and a sweater that rendered the subatomic particle almost vi ...
... Critically acclaimed as “the missing piece of the theory of everything” and “the God particle,” the boson seemed humbled and restrained as the Los Angeles County Superior Court read out the charges. It wore a pair of dark Oakley sunglasses and a sweater that rendered the subatomic particle almost vi ...
Natural Sciences
... • Theory à predictive power (“Laws of Nature”) - Use of Mathematics (“The language of Nature“) - Exploit Symmetries, aim for unifying principles ...
... • Theory à predictive power (“Laws of Nature”) - Use of Mathematics (“The language of Nature“) - Exploit Symmetries, aim for unifying principles ...
Outstanding questions: physics beyond the Standard Model
... unification of the fundamental forces. Measuring the masses of supersymmetric particles, if they exist, would be a great way of testing predictions based on such theories. Finally, supersymmetry and extra dimensions are key aspects of string theory, the only promising candidate for a consistent quant ...
... unification of the fundamental forces. Measuring the masses of supersymmetric particles, if they exist, would be a great way of testing predictions based on such theories. Finally, supersymmetry and extra dimensions are key aspects of string theory, the only promising candidate for a consistent quant ...
x 1 , x 2
... Parity, charge conjugation, CP Weak decays of quarks Charmonium and upsilon systems ...
... Parity, charge conjugation, CP Weak decays of quarks Charmonium and upsilon systems ...
Fundamental Particles, Fundamental Questions
... • The Standard Model does not predict how heavy the Higgs boson is, but it does predict how strongly it interacts with all the known particles. For fermions, the interaction is proportional to mass: ...
... • The Standard Model does not predict how heavy the Higgs boson is, but it does predict how strongly it interacts with all the known particles. For fermions, the interaction is proportional to mass: ...
CMSSM
... such terms is that of Minimal Supergravity (mSUGRA), often called the Constrained MSSM (CMSSM) (with minor differences). • This is a four parameter model, with one sign that must be chosen. ...
... such terms is that of Minimal Supergravity (mSUGRA), often called the Constrained MSSM (CMSSM) (with minor differences). • This is a four parameter model, with one sign that must be chosen. ...
CMSSM A profile likelihood analysis of the with Genetic Algorithms
... mSUGRA/CMSSM • Weak-scale supersymmetry provides a well-known solution to the technical hierarchy problem. • Specializing to a minimal extension of the Standard Model, the MSSM, one can provide a weakly interacting massive particle (WIMP) dark matter candidate, provided R−parity is respected by the ...
... mSUGRA/CMSSM • Weak-scale supersymmetry provides a well-known solution to the technical hierarchy problem. • Specializing to a minimal extension of the Standard Model, the MSSM, one can provide a weakly interacting massive particle (WIMP) dark matter candidate, provided R−parity is respected by the ...
The LHC Experiment at CERN
... All are experimental inputs! • Mass of the Higgs boson itself is not known from theory. Higgs particle has to be hunted out! experimentalists’ job! SM is NOT the complete description of physics at very high energies. e.g., corrections to Higgs mass grows beyond control unless some New Physics, whi ...
... All are experimental inputs! • Mass of the Higgs boson itself is not known from theory. Higgs particle has to be hunted out! experimentalists’ job! SM is NOT the complete description of physics at very high energies. e.g., corrections to Higgs mass grows beyond control unless some New Physics, whi ...
Supersymmetry and Lorentz Invariance as Low-Energy
... problems, since the response of the vacuum would consist of the EinsteinHilbert action plus a term that would have the form of a cosmological constant.) We have also not derived Yukawa couplings, scalar boson mass terms, and gaugino masses, so it is necessary to assume that these terms arise from ...
... problems, since the response of the vacuum would consist of the EinsteinHilbert action plus a term that would have the form of a cosmological constant.) We have also not derived Yukawa couplings, scalar boson mass terms, and gaugino masses, so it is necessary to assume that these terms arise from ...
Minimal Supersymmetric Standard Model
The Minimal Supersymmetric Standard Model (MSSM) is an extension to the Standard Model that realizes supersymmetry. MSSM is the minimal supersymmetrical model as it considers only ""the [minimum] number of new particle states and new interactions consistent with phenomenology"". Supersymmetry pairs bosons with fermions; therefore every Standard Model particle has a partner that has yet to be discovered. If the superparticles are found, it may be analogous to discovering dark matter and depending on the details of what might be found, it could provide evidence for grand unification and might even, in principle, provide hints as to whether string theory describes nature. The failure to find evidence for supersymmetry using the Large Hadron Collider since 2010 has led to suggestions that the theory should be abandoned.