# Physics Commons™

Selected Works

High energy physics phenomenology

Allan Widom

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Articles 1 - 8 of 8

## Full-Text Articles in Physics

Electric Dipole Moments And Polarizability In The Quark-Diquark Model Of The Neutron, Y. Srivastava, A. Widom, J. Swain, O. Panella Feb 2011

#### Electric Dipole Moments And Polarizability In The Quark-Diquark Model Of The Neutron, Y. Srivastava, A. Widom, J. Swain, O. Panella

##### Allan Widom

For a bound state internal wave function respecting parity symmetry, it can be rigorously argued that the mean electric dipole moment must be strictly zero. Thus, both the neutron, viewed as a bound state of three quarks, and the water molecule, viewed as a bound state of ten electrons two protons and an oxygen nucleus, both have zero mean electric dipole moments. Yet, the water molecule is said to have a nonzero dipole moment strength $d=e\Lambda$ with $\Lambda_{H_2O} \approx 0.385\ \dot{A}$. The neutron may also be said to have an electric dipole moment strength with ...

Electron Neutrino Sources From The Core Of The Earth, A. Widom, E. Sassaroli, Y. N. Srivastava Feb 2011

#### Electron Neutrino Sources From The Core Of The Earth, A. Widom, E. Sassaroli, Y. N. Srivastava

##### Allan Widom

The physical interpretation of extensive measurements of electron neutrinos (in laboratories located on or somewhat below the Earth's surface) often require geophysical notions concerning the possible neutrino sources. Here, we discuss the notion that the Earth's core is a substantial source of low energy electron neutrinos.

Dispersive Techniques For $\Alpha_S$, $R_{Had}$ And Instability Of The Perturbative Vacuum, Y. Srivastava, S. Pacetti, G. Pancheri, A. Widom Feb 2011

#### Dispersive Techniques For $\Alpha_S$, $R_{Had}$ And Instability Of The Perturbative Vacuum, Y. Srivastava, S. Pacetti, G. Pancheri, A. Widom

##### Allan Widom

Recent dispersive techniques developed by us are applied to discuss three problems: 1. A long standing discrepan-cy between the measurements of $R(s)$ for $\sqrt{s} = (5\div 7.5)GeV$ by Crystal Ball and MARK I has been analyzed and its consequences analyzed for the number of contributing quarks. 2. Noting that the perturbative $\alpha_s$ has the wrong analyticity, analytic models consistent with asymptotic freedom (AF) and confinement have been constructed and applied to discuss $\tau$ decay. 3. It is shown that AF leads to a wrong sign for $\im\big(\alpha(s)\big)$ which signals an instability of ...

Electric Field Effects And The Experimental Value Of The Muon G-2 Anomaly, A. Widom, Y. N. Srivastava Feb 2011

#### Electric Field Effects And The Experimental Value Of The Muon G-2 Anomaly, A. Widom, Y. N. Srivastava

##### Allan Widom

The electric field corrections to the recently measured muon magnetic moment g-2 anomaly are considered from both the classical (BMT) and the quantum mechanical (Dirac) viewpoints. In both views, we prove that the electric field inducing the horizontal betatron tune does not renormalize the anomaly frequency. With this result kept in mind, the experimental muon magnetic moment anomaly is in closer agreement with standard model predictions than has been previously reported.

Compact Lattice Qed And The Coulomb Potential, Y. N. Srivastava, A. Widom, M. H. Friedman, O. Panella Jan 2011

#### Compact Lattice Qed And The Coulomb Potential, Y. N. Srivastava, A. Widom, M. H. Friedman, O. Panella

##### Allan Widom

The potential energy of a static charge distribution on a lattice is rigorously computed in the standard compact quantum electrodynamic model. The method used follows closely that of Weyl for ordinary quantum electrodynamics in continuous space-time. The potential energy of the static charge distribution is independent of temperature and can be calculated from the lattice version of Poisson’s equation. It is the usual Coulomb potential.

Breakdown Of The Kln Theorem For Charged Particles In Condensed Matter, Y. N. Srivastava, A. Widom Jan 2011

#### Breakdown Of The Kln Theorem For Charged Particles In Condensed Matter, Y. N. Srivastava, A. Widom

##### Allan Widom

The Kinoshita-Lee-Nauenberg (KLN) theorem describes the fact that inclusive electromagnetic and weak production processes in the vacuum do not contain singularities in the ultra-relativistic limit of zero mass. When these production processes occur in condensed matter, the KLN theorem fails. One consequence of this failure is that precision lifetime determinations of stopped muons will depend on the nature of the surrounding material.

Coherent Betatron Oscillation And Induced Errors In The Experimental Determination Of The Muon G-2 Factor, Y. N. Srivastava, A. Widom Jan 2011

#### Coherent Betatron Oscillation And Induced Errors In The Experimental Determination Of The Muon G-2 Factor, Y. N. Srivastava, A. Widom

##### Allan Widom

Precision measurements of the anomalous magnetic moment of the muon depend on the correct collective mode assignment of the coherent betatron oscillations in the beam. Presently, there is a disagreement between experiment and theory for the horizontal betatron frequency. The discrepancy is here resolved by our computations of electrostatic beam focusing. The correct treatment of the betatron effects renders less likely the need for non-standard model corrections to the muon g-2.

Concerning The Differences Between Zero Mass Dirac And Zero Mass Majorana Neutrinos, Y. Srivastava, A. Widom Jan 2011

#### Concerning The Differences Between Zero Mass Dirac And Zero Mass Majorana Neutrinos, Y. Srivastava, A. Widom

##### Allan Widom

That a Majorana neutrino theory is different from a Dirac neutrino theory (even in the zero mass limit) is proved in two sentences.