N =1
... how SUSY breaking is fed (mediated) to the light particles determines their spectrum. This will be studied at the LHC. • Today, we’ll focus on supersymmetry breaking. ...
... how SUSY breaking is fed (mediated) to the light particles determines their spectrum. This will be studied at the LHC. • Today, we’ll focus on supersymmetry breaking. ...
Metastable Supersymmetry Breaking
... • Assuming that W is generic (and a few other minor assumptions), supersymmetry is spontaneously broken, iff the theory has a global R-symmetry. • This result applies also when supersymmetry is dynamically broken – the theory has a strongly coupled gauge theory – because the low energy theory can b ...
... • Assuming that W is generic (and a few other minor assumptions), supersymmetry is spontaneously broken, iff the theory has a global R-symmetry. • This result applies also when supersymmetry is dynamically broken – the theory has a strongly coupled gauge theory – because the low energy theory can b ...
I. What is String Theory?
... In addition to fundamental strings, superstring theory predicts the existence of objects with p spatial dimensions, called p-branes. (The fundamental string is a 1-brane.) The values of p that can occur depend on the theory. Since the dimension of space is large (9 or 10), the allowed values of p ca ...
... In addition to fundamental strings, superstring theory predicts the existence of objects with p spatial dimensions, called p-branes. (The fundamental string is a 1-brane.) The values of p that can occur depend on the theory. Since the dimension of space is large (9 or 10), the allowed values of p ca ...
String Theory - Santa Rosa Junior College
... Swedish physicist Oskar Klein suggests extra dimensions can exist if understood as being “wrapped” into a small circle (1926) ...
... Swedish physicist Oskar Klein suggests extra dimensions can exist if understood as being “wrapped” into a small circle (1926) ...
Summer_Talk_new - University of Toronto, Particle Physics and
... Higgs Boson • Electromagnetism on its own can be made to give finite results for all calculations. ...
... Higgs Boson • Electromagnetism on its own can be made to give finite results for all calculations. ...
1 - VideoLectures.NET
... Discover physics beyond the Standard Model Reminder: The Standard Model - tells us how but not why 3 flavour families? Mass spectra? Hierarchy? - needs fine tuning of parameters to level of 10-30 ! - has no connection with gravity - no unification of the forces at high energy ...
... Discover physics beyond the Standard Model Reminder: The Standard Model - tells us how but not why 3 flavour families? Mass spectra? Hierarchy? - needs fine tuning of parameters to level of 10-30 ! - has no connection with gravity - no unification of the forces at high energy ...
Sizes in the Universe - Indico
... “Constants of Nature are what they are (very big or very small) because if they weren’t, we wouldn’t be here to observe them …” ...
... “Constants of Nature are what they are (very big or very small) because if they weren’t, we wouldn’t be here to observe them …” ...
HillCTEQ2
... Testable in the Weak Interactions? Weyl Gravity in D=4 is QCD-like: Is the Higgs technically natural? On naturalness in the standard model. ...
... Testable in the Weak Interactions? Weyl Gravity in D=4 is QCD-like: Is the Higgs technically natural? On naturalness in the standard model. ...
Supersymmetry
... electron is a boson called the selectron: m (e)=m(se). However, there is no experimental (or observational) indication about the existence of the selectron. Interpretation ! ...
... electron is a boson called the selectron: m (e)=m(se). However, there is no experimental (or observational) indication about the existence of the selectron. Interpretation ! ...
PHY492: Nuclear & Particle Physics Lecture 22 Way Beyond the Standard Model
... – Heavy supersymmetric particles decays ( A --> B + A) ( –1 = –1 x +1 – Lightest supersymmetic particle cannot decay (might be stop quark) – Good Dark Matter candidate April 4, 2007 ...
... – Heavy supersymmetric particles decays ( A --> B + A) ( –1 = –1 x +1 – Lightest supersymmetic particle cannot decay (might be stop quark) – Good Dark Matter candidate April 4, 2007 ...
The Big Bang, the LHC and the Higgs boson
... etc. In hadron colliders these modes are difficult to extract because of the large QCD jet background. The silver detection mode in this mass range is the two photons mode: h , which like the gluon fusion is a loop-induced process. ...
... etc. In hadron colliders these modes are difficult to extract because of the large QCD jet background. The silver detection mode in this mass range is the two photons mode: h , which like the gluon fusion is a loop-induced process. ...
Supersymmetry: what? why? when?
... etc., do not have any special values. But just as coupling strengths change when examined at diVerent distance or energy scales, so do masses. In the supersymmetric case the entire potential energy is calculable from the basic Lagrangian. One identi® es the (mass)2 quantity that corresponds to the l ...
... etc., do not have any special values. But just as coupling strengths change when examined at diVerent distance or energy scales, so do masses. In the supersymmetric case the entire potential energy is calculable from the basic Lagrangian. One identi® es the (mass)2 quantity that corresponds to the l ...
superstring theory: past, present, and future john h. schwarz
... 2. Understand empty space The vacuum energy density, called dark energy, is observed to be about 70% of the total energy of the present Universe. It causes the expansion of the Universe to accelerate. This energy density is only about 10-122 when expressed in Planck units. Anthropic explanation: If ...
... 2. Understand empty space The vacuum energy density, called dark energy, is observed to be about 70% of the total energy of the present Universe. It causes the expansion of the Universe to accelerate. This energy density is only about 10-122 when expressed in Planck units. Anthropic explanation: If ...
Life in the Higgs condensate, where electrons have mass
... in the laboratory or the universe expands and cools after the Big Bang. Because of a quadratic divergence of radiative corrections to its mass, the Higgs boson appears to require new physics such as supersymmetry, potentially opening the door to a plethora of new effects and new particles, such as a ...
... in the laboratory or the universe expands and cools after the Big Bang. Because of a quadratic divergence of radiative corrections to its mass, the Higgs boson appears to require new physics such as supersymmetry, potentially opening the door to a plethora of new effects and new particles, such as a ...
Journey into the Microcosm – The Story of Elementary Particles
... entities mankind has probed, has attained a stage where there is a ‘standard model’ – a God of small things, so to speak – in excellent agreement with experiments, so much so that any tiny deviation, for example, a small non-zero neutrino mass, is considered a major breakthrough. There is no competi ...
... entities mankind has probed, has attained a stage where there is a ‘standard model’ – a God of small things, so to speak – in excellent agreement with experiments, so much so that any tiny deviation, for example, a small non-zero neutrino mass, is considered a major breakthrough. There is no competi ...
String Theory
... In string theory, particles come from excitations of the string The theorized particle with gravitational force, with zero mass and two units of spin, is called the Graviton Even though the graviton is compatible with quantum theory, the mathematics of the interactions does not follow String Theory ...
... In string theory, particles come from excitations of the string The theorized particle with gravitational force, with zero mass and two units of spin, is called the Graviton Even though the graviton is compatible with quantum theory, the mathematics of the interactions does not follow String Theory ...
Daniel Heineman Prize: The Quest for Quantum Gravity
... • New ideas about the nature of `string’ theory: strings are present only in certain classical limits, Dbranes seem to come closer to the fundamental degrees of freedom. ...
... • New ideas about the nature of `string’ theory: strings are present only in certain classical limits, Dbranes seem to come closer to the fundamental degrees of freedom. ...
Lecture 1 - Particle Physics Group
... Lagrangian (the formulation of the theory which is the starting point for QFT calculations). FDs are used to organise the terms in a perturbative solution of the Lagrangian. There are rules for transforming any FDk into a probability amplitude, ak. As usual in the quantum world, the total amplitude ...
... Lagrangian (the formulation of the theory which is the starting point for QFT calculations). FDs are used to organise the terms in a perturbative solution of the Lagrangian. There are rules for transforming any FDk into a probability amplitude, ak. As usual in the quantum world, the total amplitude ...
Effective Quantum Gravity and Inflation
... nonminimal coupling of the Higgs boson H to the Ricci scalar (ξH † HR) and Starobinsky’s inflation model based on R2 gravity are both minimalistic and perfectly compatible with the latest Planck data. The aim of this talk is to point out an intriguing distinct possibility, namely that Starobinsky in ...
... nonminimal coupling of the Higgs boson H to the Ricci scalar (ξH † HR) and Starobinsky’s inflation model based on R2 gravity are both minimalistic and perfectly compatible with the latest Planck data. The aim of this talk is to point out an intriguing distinct possibility, namely that Starobinsky in ...
Natural Sciences
... - However, “old theories” may be contained as border cases in the new theories - Theories may be falsified (Karl Popper) ...
... - However, “old theories” may be contained as border cases in the new theories - Theories may be falsified (Karl Popper) ...
Document
... data and rigorous statistical calculation of significance means it is impossible (and stupid) to conclude a Higgs was seen. Lower mass limit MH > 113.5 GeV (15.02) ...
... data and rigorous statistical calculation of significance means it is impossible (and stupid) to conclude a Higgs was seen. Lower mass limit MH > 113.5 GeV (15.02) ...
Particle Physics Matter, Energy, Space, Time
... neutral, weakly interacting, TeV-scale particles • There are no such WIMPs in the Standard Model • But most theories of electroweak unification have ...
... neutral, weakly interacting, TeV-scale particles • There are no such WIMPs in the Standard Model • But most theories of electroweak unification have ...
