Phenomenology Beyond the Standard Model
... • Two main parameters: mρ and coupling gρ • Equivalently ratio weak/strong scale: g ρ / mρ Grojean, Giudice, Pomarol, Rattazzi ...
... • Two main parameters: mρ and coupling gρ • Equivalently ratio weak/strong scale: g ρ / mρ Grojean, Giudice, Pomarol, Rattazzi ...
QCD meets gravity and inertia
... – valid in NP QCD – zero quark mass limit is safe due to chiral symmetry breaking Gravity proofed confinement (also when falling to Black Hole?) - gravity does not “unbalance” quark and gluon angular momenta Supported by smallness of E (isoscalar AMM) ...
... – valid in NP QCD – zero quark mass limit is safe due to chiral symmetry breaking Gravity proofed confinement (also when falling to Black Hole?) - gravity does not “unbalance” quark and gluon angular momenta Supported by smallness of E (isoscalar AMM) ...
An Introduction to the Standard Model and the Electroweak Force
... This Thesis is brought to you for free and open access by the Carl Goodson Honors Program at Scholarly Commons @ Ouachita. It has been accepted for inclusion in Honors Theses by an authorized administrator of Scholarly Commons @ Ouachita. For more information, please contact ...
... This Thesis is brought to you for free and open access by the Carl Goodson Honors Program at Scholarly Commons @ Ouachita. It has been accepted for inclusion in Honors Theses by an authorized administrator of Scholarly Commons @ Ouachita. For more information, please contact ...
Ioan Muntean - International Society for the Advanced Study of
... electroweak unification: the V-A model and the Glashow model (1961). ...
... electroweak unification: the V-A model and the Glashow model (1961). ...
Transparencies
... Is there a spin statistics theorem? There are many LQG/spin foam models. Are there criteria to pick out one that should describe nature? If LQG is even roughly right, the right version should have implications for the problem of unification. ...
... Is there a spin statistics theorem? There are many LQG/spin foam models. Are there criteria to pick out one that should describe nature? If LQG is even roughly right, the right version should have implications for the problem of unification. ...
Gravity, Particle Physics and Their Unification 1 Introduction
... know yet how to solve the third challenge. Maybe string theory is the solution and we just have to understand it better or maybe we have to modify it in some way. String theory is a theory under construction. We know several limits and aspects of the theory, but we still do not know the fundamental ...
... know yet how to solve the third challenge. Maybe string theory is the solution and we just have to understand it better or maybe we have to modify it in some way. String theory is a theory under construction. We know several limits and aspects of the theory, but we still do not know the fundamental ...
Particle Physics on Noncommutative Spaces
... • Furthermore, the Standard Model needs to be extended if it is coupled to gravity since it is then inconsistent: noncommutative gauge theories are a natural candidate to solve this problem. ...
... • Furthermore, the Standard Model needs to be extended if it is coupled to gravity since it is then inconsistent: noncommutative gauge theories are a natural candidate to solve this problem. ...
Untitled - School of Natural Sciences
... Planck length (10 –33 centimeter), quantum principles imply that spacetime itself should be a seething foam, similar to the sea of virtual particles that fills empty space. When matter and spacetime are so protean, what do the equations of general relativity predict? The answer is that the equations ...
... Planck length (10 –33 centimeter), quantum principles imply that spacetime itself should be a seething foam, similar to the sea of virtual particles that fills empty space. When matter and spacetime are so protean, what do the equations of general relativity predict? The answer is that the equations ...
Supersymmetry: what? why? when?
... That is, from the point of view of quantum theory, our familiar space-time coordinates commute and are bosonic operators. New coordinates h a are `superpartners’ of the usual xl , leading to a formulation of the theory in `superspace’ . These extra dimensions are not related to the extra dimensions ...
... That is, from the point of view of quantum theory, our familiar space-time coordinates commute and are bosonic operators. New coordinates h a are `superpartners’ of the usual xl , leading to a formulation of the theory in `superspace’ . These extra dimensions are not related to the extra dimensions ...
Standard Model
... any given time (they follow the Pauli exclusion principle). If more than one fermion occupies the same physical space, at least one property of each fermion, such as its spin, must be different. Fermions are usually associated with matter. ...
... any given time (they follow the Pauli exclusion principle). If more than one fermion occupies the same physical space, at least one property of each fermion, such as its spin, must be different. Fermions are usually associated with matter. ...
quantum field theory, effective potentials and determinants of elliptic
... All of non-gravitational interactions of the particles we have seen so far can be explained by a quantum gauge theory with the symmetry group SU(3)c × SU(2)L × U(1)Y (c is colour, L is left handed and Y is hypercharge) which is broken spontaneously to SU(3)c × U(1)em . When this symmetry is gauged, ...
... All of non-gravitational interactions of the particles we have seen so far can be explained by a quantum gauge theory with the symmetry group SU(3)c × SU(2)L × U(1)Y (c is colour, L is left handed and Y is hypercharge) which is broken spontaneously to SU(3)c × U(1)em . When this symmetry is gauged, ...
String Theory - Indico
... • In 1997 Maldacena made this duality very concrete and began the construction of the dictionary between gravity and gauge theories. ...
... • In 1997 Maldacena made this duality very concrete and began the construction of the dictionary between gravity and gauge theories. ...
Ross.pdf
... The laws that govern the strong and weak interactions follow from the same local gauge principle applied to a relativistic field theory that led to Quantum Electrodynamics (QED), the quantum version of Maxwell’s theory of electromagnetism. The underlying ingredient is the recognition of a symmetry re ...
... The laws that govern the strong and weak interactions follow from the same local gauge principle applied to a relativistic field theory that led to Quantum Electrodynamics (QED), the quantum version of Maxwell’s theory of electromagnetism. The underlying ingredient is the recognition of a symmetry re ...
Non-Equilibrium Dynamics and Physics of the Terascale
... NEFT is slowly reaching maturity and its current status is “work in progress”. We emphasize here that, regarding b), e), f) and h), a number of introductory contributions have been initiated by the author over the last decade or so. Main highlights are listed below: 1) Hierarchical structure of ele ...
... NEFT is slowly reaching maturity and its current status is “work in progress”. We emphasize here that, regarding b), e), f) and h), a number of introductory contributions have been initiated by the author over the last decade or so. Main highlights are listed below: 1) Hierarchical structure of ele ...
String and the Strong Force Summary/Review
... – If you try to pull the meson apart, in the QCD picture you end up producing another quark/antiquark pair, which results in having two mesons. This could equally be explained if the mesons are really strings: if you pull apart a string, what you get is two smaller strings. – Proton and neutron inte ...
... – If you try to pull the meson apart, in the QCD picture you end up producing another quark/antiquark pair, which results in having two mesons. This could equally be explained if the mesons are really strings: if you pull apart a string, what you get is two smaller strings. – Proton and neutron inte ...
Exotic Goldstone Particles: Pseudo-Goldstone Boson and Goldstone
... So G̃ is a massless Weyl fermion with the same quantum number of the broken supersymmetry generator, which implies it is proportional to the goldstino wavefunction. From the derivation above, we find that if global supersymmetry is spontaneously broken, then there must be a massless goldstino, and i ...
... So G̃ is a massless Weyl fermion with the same quantum number of the broken supersymmetry generator, which implies it is proportional to the goldstino wavefunction. From the derivation above, we find that if global supersymmetry is spontaneously broken, then there must be a massless goldstino, and i ...
E-Infinity theory and the Higgs field - SelectedWorks
... (1) If we regard the Higgs field, we see that it has eight degrees of freedom. They could be all or some of them particles. At present we think five may be particles of the Higgs type and the other three do not appear directly as any kinds of particles. (2) The Higgs field is a substitute for gravity, ...
... (1) If we regard the Higgs field, we see that it has eight degrees of freedom. They could be all or some of them particles. At present we think five may be particles of the Higgs type and the other three do not appear directly as any kinds of particles. (2) The Higgs field is a substitute for gravity, ...
Slide sem título - Instituto de Física / UFRJ
... of MW (DMWW=+-1: +-4 MeV) and fermionic two-loop calculations of sin2teff (DSWW=+-1: +-4.9D-5). The theory uncertainty for the Higgs-mass prediction is dominated by DSWW. The blue band will be the area enclosed by the two ...
... of MW (DMWW=+-1: +-4 MeV) and fermionic two-loop calculations of sin2teff (DSWW=+-1: +-4.9D-5). The theory uncertainty for the Higgs-mass prediction is dominated by DSWW. The blue band will be the area enclosed by the two ...
here:
... in a collaboration with Gell-Mann in 1961 . From the recently developing ideas of current algebra we showed that a gauge theory of weak interactions would inevitably run into the problem of strangeness-changing neutral currents. We concluded that something essential was missing. Indeed it was. Only ...
... in a collaboration with Gell-Mann in 1961 . From the recently developing ideas of current algebra we showed that a gauge theory of weak interactions would inevitably run into the problem of strangeness-changing neutral currents. We concluded that something essential was missing. Indeed it was. Only ...
UNSTRUNG
... String theory came into existence by accident. In the late nineteen-sixties, a couple of young physicists thumbing through mathematics books came upon a centuries-old formula that, miraculously, seemed to fit the latest experimental data about elementary particles. At first, no one had a clue why th ...
... String theory came into existence by accident. In the late nineteen-sixties, a couple of young physicists thumbing through mathematics books came upon a centuries-old formula that, miraculously, seemed to fit the latest experimental data about elementary particles. At first, no one had a clue why th ...
TRImP Trapped Radioactive Isotopes
... open to outside users (first users from France already in 2004!) will concentrate first on CP/ T violation – electroweak tests ...
... open to outside users (first users from France already in 2004!) will concentrate first on CP/ T violation – electroweak tests ...
Precision EWK - Durham University
... To simplify, one usually talks about 5 independent, CP conserving, EM gauge invariance preserving couplings: g1Z, kg, kZ, g, Z – In the SM, g1Z = kg = kZ = 1 and g = Z = 0 • Often useful to talk about g, k and instead. • Convention on quoting sensitivity is to hold the other 4 couplings a ...
... To simplify, one usually talks about 5 independent, CP conserving, EM gauge invariance preserving couplings: g1Z, kg, kZ, g, Z – In the SM, g1Z = kg = kZ = 1 and g = Z = 0 • Often useful to talk about g, k and instead. • Convention on quoting sensitivity is to hold the other 4 couplings a ...
An Exceptionally Simple Theory of Everything
""An Exceptionally Simple Theory of Everything"" is a physics preprint proposing a basis for a unified field theory, very often referred to as ""E8 Theory"", which attempts to describe all known fundamental interactions in physics and to stand as a possible theory of everything. The paper was posted to the physics arXiv by Antony Garrett Lisi on November 6, 2007, and was not submitted to a peer-reviewed scientific journal. The title is a pun on the algebra used, the Lie algebra of the largest ""simple"", ""exceptional"" Lie group, E8. The paper's goal is to describe how the combined structure and dynamics of all gravitational and Standard Model particle fields, including fermions, are part of the E8 Lie algebra. In the paper, Lisi states that all three generations of fermions do not directly embed in E8 with correct quantum numbers and spins, but that they might be described via a triality transformation, noting that the theory is incomplete and that a correct description of the relationship between triality and generations, if it exists, awaits a better understanding.The theory received accolades from a few physicists amid a flurry of media coverage, but also met with widespread skepticism. Scientific American reported in March 2008 that the theory was being ""largely but not entirely ignored"" by the mainstream physics community, with a few physicists picking up the work to develop it further.In a follow-up paper, Lee Smolin proposed a spontaneous symmetry breaking mechanism for obtaining the classical action in Lisi's model, and speculated on the path to its quantization.In July 2009, Jacques Distler and Skip Garibaldi published a critical paper in Communications in Mathematical Physics called ""There is no 'Theory of Everything' inside E8"", arguing that Lisi's theory, and a large class of related models, cannot work. They offer a direct proof that it is impossible to embed all three generations of fermions in E8, or to obtain even the one-generation Standard Model without the presence of an antigeneration. In response to Distler and Garibaldi's paper, Lisi argued, in a new paper ""An Explicit Embedding of Gravity and the Standard Model in E8"", peer reviewed and published in a conference proceedings, that some assumptions about fermion embeddings are unnecessary and that the antigeneration is not by itself a problem sufficient to rule out the one-generation Standard Model. In December 2010 and May 2011, Lisi wrote in the popular magazine Scientific American a feature article on the E8 Theory of Everything and an entry in the blog section of the magazine addressing some of the criticism of his theory and how it has progressed, noting that the theory is still incomplete and makes only tenuous predictions, with the three generation issue remaining as a significant problem.