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Search Results: 1 - 10 of 507532 matches for " E. -M. Kabub "
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Measurement of the Transverse Beam Spin Asymmetry in Elastic Electron Proton Scattering and the Inelastic Contribution to the Imaginary Part of the Two-Photon Exchange Amplitude
F. E. Maas,K. Aulenbacher,S. Baunack,L. Capozza,J. Diefenbach,B. Gl?ser,Y. Imai,T. Hammel,D. von Harrach,E. -M. Kabub,R. Kothe,J. H. Lee,A. Sanchez-Lorente,E. Schilling,D. Schwaab,G. Stephan,G. Weber,C. Weinrich,I. Altarev,J. Arvieux,M. Elyakoubi,R. Frascaria,R. Kunne,M. Morlet,S. Ong,J. Vandewiele,S. Kowalski,R. Suleiman,S. Taylor
Physics , 2004, DOI: 10.1103/PhysRevLett.94.082001
Abstract: We report on a measurement of the asymmetry in the scattering of transversely polarized electrons off unpolarized protons, A$_\perp$, at two Q$^2$ values of \qsquaredaveragedlow (GeV/c)$^2$ and \qsquaredaveragedhighII (GeV/c)$^2$ and a scattering angle of $30^\circ < \theta_e < 40^\circ$. The measured transverse asymmetries are A$_{\perp}$(Q$^2$ = \qsquaredaveragedlow (GeV/c)$^2$) = (\experimentalasymmetry alulowcorr $\pm$ \statisticalerrorlow$_{\rm stat}$ $\pm$ \combinedsyspolerrorlowalucor$_{\rm sys}$) $\times$ 10$^{-6}$ and A$_{\perp}$(Q$^2$ = \qsquaredaveragedhighII (GeV/c)$^2$) = (\experimentalasymme tryaluhighcorr $\pm$ \statisticalerrorhigh$_{\rm stat}$ $\pm$ \combinedsyspolerrorhighalucor$_{\rm sys}$) $\times$ 10$^{-6}$. The first errors denotes the statistical error and the second the systematic uncertainties. A$_\perp$ arises from the imaginary part of the two-photon exchange amplitude and is zero in the one-photon exchange approximation. From comparison with theoretical estimates of A$_\perp$ we conclude that $\pi$N-intermediate states give a substantial contribution to the imaginary part of the two-photon amplitude. The contribution from the ground state proton to the imaginary part of the two-photon exchange can be neglected. There is no obvious reason why this should be different for the real part of the two-photon amplitude, which enters into the radiative corrections for the Rosenbluth separation measurements of the electric form factor of the proton.
Contradiction between Conservation Laws and Orthodox Quantum Mechanics  [PDF]
M. E. Burgos
Journal of Modern Physics (JMP) , 2010, DOI: 10.4236/jmp.2010.12019
Abstract: In this paper, it showed that the orthodox version of quantum mechanics contradicts the idea that conservation laws are valid in individual processes of measurement.
Proposing a novel, efficient measure for assessing glade restoration efficacy: wildflower presence and abundance  [PDF]
Adam E. M. Eltorai
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.23026
Abstract: Human presence is detrimentally affecting natural environments. Glades are an example of such envi-ronments. As glades diminish in number, proper restoration efforts are essential for the preservation of the habitats’ unique ecosystems, biodiversity and natural processes. To ensure glade survivorship, evaluation of glade restoration efforts is critical. As indicators of the trophic level of producers in a food chain, wildflowers can serve as overall indicators of the restoration process. A comparison of wildflower species presence and abundance between recently restored and control glades offer insights into the restoration progress. In this paper, I propose the us-age of a novel method for assessing restoration effi-cacy. I outline step-by-step how to apply such a method. I then explain how the implementation of such a method can be used to address questions re-garding the restoration effort’s efficacy.
On Some Properties of the Heisenberg Laplacian  [PDF]
M. E. Egwe
Advances in Pure Mathematics (APM) , 2012, DOI: 10.4236/apm.2012.25051
Abstract: Let IHn be the (2n+1) -dimensional Heisenberg group and let Lα and be the sublaplacian and central element of the Lie algebra of IHn respectively. Forα=0 denote by L0=L the Heisenberg Laplacian and let K ∈Aut(IHn) be a compact subgroup of Au-tomorphism of IHn. In this paper, we give some properties of the Heisenberg Laplacian and prove that L and T generate the K-invariant universal enveloping algebra, U(hn)k of IHn.
Letter to the Editor  [PDF]
Amosy E. M’Koma
Advances in Enzyme Research (AER) , 2013, DOI: 10.4236/aer.2013.14008
Abstract: Advances in Enzyme Research
Opening of a Gap in Graphene Due to Supercell Potential: Group Theory Point of View  [PDF]
E. Kogan, M. Kaveh
Graphene (Graphene) , 2014, DOI: 10.4236/graphene.2014.32004
Abstract:

We analyze in the framework of the space group theory the change of the dispersion law in grapenein and the vicinity of the (former) Dirac points due to application of supercell potential with the \"\" space priodicity and the same point symmetry as graphene.

Two Low Profile Unbalanced Fed Inverted L Elements on Square Conducting Plane for MIMO Applications  [PDF]
E. Rohadi, M. Taguchi
Wireless Engineering and Technology (WET) , 2014, DOI: 10.4236/wet.2014.52005
Abstract:

Two ultra low profile inverted L antennas located on the square conducting plane are numerically and experimentally analyzed as the multiple input multiple output (MIMO) antenna system. When the size of conducting plane is 0.45 λ by 0.45 λ and the height of antenna is 0.03 λ, the directive gain of 4.12 dBi and the return loss bandwidth of 3.67% are achieved. The proposed antenna has good diversity gain shown by the correlation coefficient, and becomes less than 0.02 at the frequency of 2.45 GHz band when the distance between inverted L elements is 0.33 λ. The results show the weak mutual coupling of the proposed antenna and its performances are promising as MIMO antenna applications.

Evidence of Action-at-a-Distance in Experiments with Individual Particles  [PDF]
M. E. Burgos
Journal of Modern Physics (JMP) , 2015, DOI: 10.4236/jmp.2015.611168
Abstract: We make a brief historical revision of action-at-a-distance in quantum mechanics. Non-locality has been mostly related to systems of two particles in an entangled state. We show that this effect is also apparent in some experiments with individual particles. An easily performed experiment in this regard is introduced.
Success and Incoherence of Orthodox Quantum Mechanics  [PDF]
M. E. Burgos
Journal of Modern Physics (JMP) , 2016, DOI: 10.4236/jmp.2016.712132
Abstract: Orthodox quantum mechanics is a highly successful theory despite its serious conceptual flaws. It renounces realism, implies a kind of action-at-a-distance and is incompatible with determinism. Orthodox quantum mechanics states that Schrödinger’s equation (a deterministic law) governs spontaneous processes while measurement processes are ruled by probability laws. It is well established that time dependent perturbation theory must be used for solving problems involving time. In order to account for spontaneous processes, this last theory makes use of laws valid only when measurements are performed. This incoherence seems absent from the literature.
On the Structure of Electrons and Other Charged Leptons  [PDF]
M. E. Shulman
Journal of High Energy Physics, Gravitation and Cosmology (JHEPGC) , 2017, DOI: 10.4236/jhepgc.2017.33039
Abstract: A model of the electron is examined, allowing us to obtain its mass, spin and magnetic moment. The electron is represented as a sphere of classical radius (protoelektron) with zero rest mass, the rotating orbit radius of which is reduced value of the Compton wavelength of the electron. The ratio of the radius of the sphere to the radius of the orbit is equal to the fine structure constant. The sphere has a single charge distributed over its surface. Due mutual repulsion of parts of charge sphere acquires a mass equal to half of the rest mass of an electron, rotating mechanical mass protoelektron on orbit provides its characteristic electron spin 1/2 and kinetic energy, which creates 1/4 of the rest mass. Rotation of charge, similar to the ring current generates a magnetic moment equal to the Bohr magneton and magnetic energy, creating 1/4 of the rest mass of an electron. The total energy of the electron is the sum of its electrostatic, magnetic and kinetic energy. Accordingly, the total mass of the electron is the sum of the masses of electrostatic, magnetic and kinetic origin. The model is applicable to the muon and tau leptons. The correct ratio between the mass, spin and magnetic moment for them observed under the condition in the ratio of the radius of the charged sphere to the radius of the orbit equal to the fine structure constant. The model allows us to understand the physical nature of a number of problems: the Heisenberg uncertainty principle, Lorentz transformations and wave properties of the electron. The cause of the orbital rotation proto-particles is a magnetic field which creates self-acting rotation proto-particles around its own axis.
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