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... A hypothesis is an idea or suggestion that has been put forward to explain a set of observations. It may be expressed in terms of a mathematical model. The model makes a number of predictions that can be tested in experiments. After many tests have been made, if the model can be refined to correctly ...
... A hypothesis is an idea or suggestion that has been put forward to explain a set of observations. It may be expressed in terms of a mathematical model. The model makes a number of predictions that can be tested in experiments. After many tests have been made, if the model can be refined to correctly ...
Spin tune in the single resonance model with a pair of
... obtained which is valid at first order in h̄ [9]. This emphasises again that, as with all action–angle formulations, the spin frequency cannot depend on orbital phases. Moreover, it is easy to show that at orbital resonance, ( i.e. k 0 + k1 Q1 + k2 Q2 + k3 Q3 = 0 for suitable integers k) the “diagon ...
... obtained which is valid at first order in h̄ [9]. This emphasises again that, as with all action–angle formulations, the spin frequency cannot depend on orbital phases. Moreover, it is easy to show that at orbital resonance, ( i.e. k 0 + k1 Q1 + k2 Q2 + k3 Q3 = 0 for suitable integers k) the “diagon ...
Document
... a formal construction (Lovelock 1971; Navarro 2010). In the present approach, it is determined up to a constant g0 times the scalar curvature s. This indeterminacy differs from the cosmological constant by the factor s. That may provide a testable condition. The present geometric approach suggests t ...
... a formal construction (Lovelock 1971; Navarro 2010). In the present approach, it is determined up to a constant g0 times the scalar curvature s. This indeterminacy differs from the cosmological constant by the factor s. That may provide a testable condition. The present geometric approach suggests t ...
Topological Charges, Prequarks and Presymmetry: a
... As it is shown above, standard bare quarks instead of prequarks are the fermions to start with in the quantum field theory treatment. The novel news is that bare quarks have fractional charges owing to a universal contribution from a classical gauge field configuration with specific topological properti ...
... As it is shown above, standard bare quarks instead of prequarks are the fermions to start with in the quantum field theory treatment. The novel news is that bare quarks have fractional charges owing to a universal contribution from a classical gauge field configuration with specific topological properti ...
PowerPoint Presentation - Gravity on quantized space-times
... Scale invariance is broken spontaneously and explicitly by logarithmic quantum corrections, , – dimensional transmutation Interesting model building/pheno [R. Foot, A.K., K.L. McDonalds, R.R. Volkas] CoEPP-2013 Cairns, July 2013 ...
... Scale invariance is broken spontaneously and explicitly by logarithmic quantum corrections, , – dimensional transmutation Interesting model building/pheno [R. Foot, A.K., K.L. McDonalds, R.R. Volkas] CoEPP-2013 Cairns, July 2013 ...
Overview of Neutrino Physics Issues and Opportunities Andr´ e de Gouvˆ
... SLAC National Accelerator Laboratory, October 28–31, 2008 ...
... SLAC National Accelerator Laboratory, October 28–31, 2008 ...
PARTICLE PHYSICS BEYOND THE STANDARD MODEL
... dark matter density in the universe. Moreover, the flavor or generation structure of the quark and lepton sector with its observed symmetry structure is not explained by the Standard Model. This includes the generation of light neutrino masses for essentially left-handed fields. Pointing towards hig ...
... dark matter density in the universe. Moreover, the flavor or generation structure of the quark and lepton sector with its observed symmetry structure is not explained by the Standard Model. This includes the generation of light neutrino masses for essentially left-handed fields. Pointing towards hig ...
Calculation of the nucleon axial charge in lattice QCD
... We use the gluon configurations from the MILC collaboration [4] for the evaluation of the lattice QCD integrals. Additionally we use domain wall fermions to represent the quarks inside the nucleon. Our current calculation is done at five quark masses, equivalently pion masses, at one volume and addi ...
... We use the gluon configurations from the MILC collaboration [4] for the evaluation of the lattice QCD integrals. Additionally we use domain wall fermions to represent the quarks inside the nucleon. Our current calculation is done at five quark masses, equivalently pion masses, at one volume and addi ...
Effective Field Theories, Reductionism and Scientific Explanation Stephan Hartmann
... quantum physics. They are almost everywhere, and everything is considered to be an effective field theory (EFT). Particle physicists, for example, even take a supposed-tobe fundamental theory such as the celebrated Standard Model of the electromagnetic, weak, and strong interactions to be an EFT (Meis ...
... quantum physics. They are almost everywhere, and everything is considered to be an effective field theory (EFT). Particle physicists, for example, even take a supposed-tobe fundamental theory such as the celebrated Standard Model of the electromagnetic, weak, and strong interactions to be an EFT (Meis ...
The Internal and External Problems of String Theory
... and it is completely unknown which physically interpretable principles could form the basis of string theory. At the moment, "string theory" is no theory at all, but rather a labyrinthic structure of mathematical procedures and intuitions. The only motivations for string theory consist in the mutual ...
... and it is completely unknown which physically interpretable principles could form the basis of string theory. At the moment, "string theory" is no theory at all, but rather a labyrinthic structure of mathematical procedures and intuitions. The only motivations for string theory consist in the mutual ...
Fermi and the Theory of Weak Interactions
... the ¯eld operators p; n; º and e and their barred counterparts. These create or annihilate the corresponding particle or antiparticle as explained above. Hence LF leads to many related weak processes apart from the decay of proton and neutron. Particles or quanta of ¯elds come in two varieties, boso ...
... the ¯eld operators p; n; º and e and their barred counterparts. These create or annihilate the corresponding particle or antiparticle as explained above. Hence LF leads to many related weak processes apart from the decay of proton and neutron. Particles or quanta of ¯elds come in two varieties, boso ...
![[σB] i - CERN Indico](http://s1.studyres.com/store/data/013801061_1-ecc77d1819831bdb318bf6696c3f29f2-300x300.png)
[σB] i - CERN Indico
... topologies within a complicated model and track them all the way through publication and follow-up pheno analyses. Get much more mileage out of a model/topology by providing sigma*Br’ s for exclusive internal channels. Doing so makes it easy to combine pieces within and between experiments. At ...
... topologies within a complicated model and track them all the way through publication and follow-up pheno analyses. Get much more mileage out of a model/topology by providing sigma*Br’ s for exclusive internal channels. Doing so makes it easy to combine pieces within and between experiments. At ...
Fermi and the Theory of Weak Interactions
... In general, a ¯eld operator such as p can either annihilate a particle or create the corresponding antiparticle while a ¯eld operator with a bar above such as p¹ can either annihilate an antiparticle or create a particle. The antielectron is the positron. In general the antiparticle is di®erent from ...
... In general, a ¯eld operator such as p can either annihilate a particle or create the corresponding antiparticle while a ¯eld operator with a bar above such as p¹ can either annihilate an antiparticle or create a particle. The antielectron is the positron. In general the antiparticle is di®erent from ...
Lecture 5: Physics Beyond the Standard Model and Supersymmetry
... Infinities in the Standard Model • Importance of Hierarchy Problem related to infinities–look closer at those • The ’Higgs bath’, along with the scale of W and Z masses, is determined by a dynamically generated potential for the Higgs field • This potential is determined by quantum effects involving ...
... Infinities in the Standard Model • Importance of Hierarchy Problem related to infinities–look closer at those • The ’Higgs bath’, along with the scale of W and Z masses, is determined by a dynamically generated potential for the Higgs field • This potential is determined by quantum effects involving ...
![arXiv:1412.5987v1 [hep-ex] 18 Dec 2014](http://s1.studyres.com/store/data/008057205_1-733500b8b6bd2637f9a7ffd625392271-300x300.png)
arXiv:1412.5987v1 [hep-ex] 18 Dec 2014
... a factor of 2 with respect to pp. Since the kinematic distributions of gluons producing the J/ψ or the ψ(2S) are rather similar and since the coherent energy loss does not depend on the final quantum numbers of the resonances, the same theoretical calculations hold for both J/ψ and ψ(2S). Theoretica ...
... a factor of 2 with respect to pp. Since the kinematic distributions of gluons producing the J/ψ or the ψ(2S) are rather similar and since the coherent energy loss does not depend on the final quantum numbers of the resonances, the same theoretical calculations hold for both J/ψ and ψ(2S). Theoretica ...
Beyond the Standard Model - Particle Physics Department (PPD)
... • Unification of the fundamental forces? at very high energy? explore indirectly via particle masses, couplings ...
... • Unification of the fundamental forces? at very high energy? explore indirectly via particle masses, couplings ...
Phenomenology of Higgs Bosons Beyond the Standard Model
... run. Up to date one has found, depending how one counts, seventeen particles which are classified as elementary, and where applicable, also their corresponding antiparticles. The latest particle to be found was a Higgs boson, in the autumn of 2012 [3, 4, 5]. Theoretically, particles are described as ...
... run. Up to date one has found, depending how one counts, seventeen particles which are classified as elementary, and where applicable, also their corresponding antiparticles. The latest particle to be found was a Higgs boson, in the autumn of 2012 [3, 4, 5]. Theoretically, particles are described as ...
Lecture Notes on the Standard Model of Elementary Particle Physics
... Model of Glashow, Salam and Weinberg: fields and gauge symmetries, Lie groups and Lie algebras, gauge-invariant Lagrangian field theories and the spontaneous breaking of continuous symmetries. The notes include a discussion of spinor fields since relativistic quantum mechanics is not always known to ...
... Model of Glashow, Salam and Weinberg: fields and gauge symmetries, Lie groups and Lie algebras, gauge-invariant Lagrangian field theories and the spontaneous breaking of continuous symmetries. The notes include a discussion of spinor fields since relativistic quantum mechanics is not always known to ...
Nanostructured Carbon Allotropes as Weyl
... much richer field and experimental test should be easier. → An emerging battlefield of particle physics. Good condensed matter physicist needs to be intradisplinary! ...
... much richer field and experimental test should be easier. → An emerging battlefield of particle physics. Good condensed matter physicist needs to be intradisplinary! ...
Oxford Master Course in Mathematical and Theoretical Physics
... areas and to those who have already firmly set their sights on one of the three subject areas (although they too are encouraged to explore across sub-field boundaries). Studies can be pursued with stronger emphasis on mathematical or on physical aspects. Appendix B gives examples of different pathwa ...
... areas and to those who have already firmly set their sights on one of the three subject areas (although they too are encouraged to explore across sub-field boundaries). Studies can be pursued with stronger emphasis on mathematical or on physical aspects. Appendix B gives examples of different pathwa ...
Some basics of discrete space
... Understand the matter-anti-matter asymmetry problem, new physics is needed. More experimental data needed. • No direct evidence for CPT symmetry breaking. Further test of CPT needed. • The studies of C, P, T symmetries have provided many understandings of the laws of nature. Future studies will ...
... Understand the matter-anti-matter asymmetry problem, new physics is needed. More experimental data needed. • No direct evidence for CPT symmetry breaking. Further test of CPT needed. • The studies of C, P, T symmetries have provided many understandings of the laws of nature. Future studies will ...
Some Problems in String Cosmology
... Understand the matter-anti-matter asymmetry problem, new physics is needed. More experimental data needed. • No direct evidence for CPT symmetry breaking. Further test of CPT needed. • The studies of C, P, T symmetries have provided many understandings of the laws of nature. Future studies will ...
... Understand the matter-anti-matter asymmetry problem, new physics is needed. More experimental data needed. • No direct evidence for CPT symmetry breaking. Further test of CPT needed. • The studies of C, P, T symmetries have provided many understandings of the laws of nature. Future studies will ...
In search of symmetry lost
... three ‘standard systems’. These are the gauge system, the gravity system and the Higgs system. Each of these systems concerns the interactions of a specific kind of particle: gauge bosons, gravitons and Higgs particles, respectively. It is remarkable that everything we know, or reliably infer, about ...
... three ‘standard systems’. These are the gauge system, the gravity system and the Higgs system. Each of these systems concerns the interactions of a specific kind of particle: gauge bosons, gravitons and Higgs particles, respectively. It is remarkable that everything we know, or reliably infer, about ...
ibm_seminar - Stony Brook University
... The prototype candidate was a new interaction similar to QCD (“Technicolor”) with new particles at O(few TeV). The simplest of these models would however produce deviations from the SM that are not seen, but many more complex variants exist. These models give new quarks, bosons, ‘leptoquarks’, etc. ...
... The prototype candidate was a new interaction similar to QCD (“Technicolor”) with new particles at O(few TeV). The simplest of these models would however produce deviations from the SM that are not seen, but many more complex variants exist. These models give new quarks, bosons, ‘leptoquarks’, etc. ...
yale - Particle Theory Group
... ….accuracy is a virtue and inquiry is a moral imperative To the hegemony of science we owe a feeling for which there is no name, but which is akin to the faith of the innocent that the truth will out and vindication will follow. In its purest form science is justice as well as reason. ...
... ….accuracy is a virtue and inquiry is a moral imperative To the hegemony of science we owe a feeling for which there is no name, but which is akin to the faith of the innocent that the truth will out and vindication will follow. In its purest form science is justice as well as reason. ...
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.