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Full-Text Articles in Physics
Higgs-Boson-Exchange Models Of Cp Violation And K-]2pi, Jf Donoghue, Js Hagelin, Br Holstein
Higgs-Boson-Exchange Models Of Cp Violation And K-]2pi, Jf Donoghue, Js Hagelin, Br Holstein
Barry R Holstein
Work by Deshpande and Sanda, which appears to invalidate Higgs-boson-exchange models of CP noninvariance, is buttressed by (i) use of the MIT bag model to calculate matrix elements, (ii) use of experimental rather than calculated numbers for the K→2π decay amplitude and the KL-KS mass difference, and (iii) inclusion of possible t-quark effects. We conclude that, barring accidental cancellations, such Higgs-boson-exchange models are incompatible with experiment.
Derivation Of The Weak Quark-Model Interaction Between Nucleons, Br Holstein
Derivation Of The Weak Quark-Model Interaction Between Nucleons, Br Holstein
Barry R Holstein
No abstract provided.
Neutrons And Hadronic Parity Violation, Br Holstein
Neutrons And Hadronic Parity Violation, Br Holstein
Barry R Holstein
The history and phenomenology of hadronic parity violation are reviewed, and the important role of the neutron in unlocking the physics of this subject is outlined.
Hadronic Parity Violation And Effective Field Theory, Br Holstein
Hadronic Parity Violation And Effective Field Theory, Br Holstein
Barry R Holstein
The history and phenomenology of hadronic parity violation is reviewed and a new modelindependent approach based on effective field theory is developed. Possible future developments are discussed.
The Mysterious Disappearance Of Ettore Majorana - Art. No. 012019, Br Holstein
The Mysterious Disappearance Of Ettore Majorana - Art. No. 012019, Br Holstein
Barry R Holstein
We review the short but interesting life of Ettore Majorana.
Chiral Perturbation Theory: An Effective Field Theory, Br Holstein
Chiral Perturbation Theory: An Effective Field Theory, Br Holstein
Barry R Holstein
The concept of an effective field theory (EFT), i.e. a theory which is valid only in a limited range of parameter space, is one which has become highly developed recently. After presenting familiar examples from the realms of classical and quantum mechanics together with condensed matter physics, we show that QCD has an intriguing parallel with superconductivity in that, by using quark–antiquark (mesonic) degrees of freedom and exploiting the symmetries of the theory, a useful and powerful theory–chiral perturbation theory–results, which offers a complete and rigorous description of low energy particle and nuclear physics.
Spin Effects In The Effective Quantum Field Theory Of General Relativity, A Ross, Br Holstein
Spin Effects In The Effective Quantum Field Theory Of General Relativity, A Ross, Br Holstein
Barry R Holstein
The calculation of gravitational scattering of particles with various spin configurations in the framework of effective quantum field theory of general relativity is presented. We find that the long-range quantum and classical corrections to the spin-independent piece and the spin–orbit coupling piece of the scattering amplitude and the scattering potential are universal for different spin configurations, which leads us to propose this universality to be true for arbitrary spins. Furthermore, we give the leading corrections to the spin–spin coupling, and a comparison with scattering in QED is made.
Gyroscope Precession And General Relativity, Br Holstein
Gyroscope Precession And General Relativity, Br Holstein
Barry R Holstein
Precession of a gyroscope in the presence of a gravitational field is of considerable interest, on account of the soon to be launched satellite test and because of its connection to Mach's principle. Nevertheless, this topic is not generally covered in the curriculum because of the mathematical sophistication required. We examine some of the simple physics involved and argue that by examining simple graviton-elementary particle couplings one can easily understand this phenomenon.
Comment On "The Van Der Waals Interaction," By Barry R. Holstein [Am. J. Phys. 69 (4), 441-449 (2001)], Br Holstein
Comment On "The Van Der Waals Interaction," By Barry R. Holstein [Am. J. Phys. 69 (4), 441-449 (2001)], Br Holstein
Barry R Holstein
No abstract provided.
Evaluating The Effective Action, Br Holstein
Evaluating The Effective Action, Br Holstein
Barry R Holstein
The use of effective field theory, in situations wherein the energy-momentum of light particles is much lower than the rest mass of heavy degrees of freedom, has become an important one in contemporary physics. Herein we examine various means by which this effective action can be evaluated, using the effective photon–photon interaction—the Euler–Heisenberg Lagrangian—as a pedagogical example.
Improved Treatment Of Loop Diagrams In Su(3) Baryon Chiral Perturbation Theory, Jf Donoghue, Br Holstein
Improved Treatment Of Loop Diagrams In Su(3) Baryon Chiral Perturbation Theory, Jf Donoghue, Br Holstein
Barry R Holstein
Baryon chiral perturbation theory as conventionally applied has a well-known problem with the SU(3) chiral expansion in that loop diagrams generate very large SU(3) breaking corrections and greatly upset the subsequent phenomenology. We argue that the problem comes from the portions of loop integrals corresponding to propagation at such short distances that the effective theory is not valid. One can reformulate the theory equally rigorously by regulating the loop integrals using a momentum-space cutoff which removes the spurious short-distance physics. We show that this reformulation improves the phenomenology for reasonable values of the cutoff.
The Harmonic Oscillator Propagator, Br Holstein
The Harmonic Oscillator Propagator, Br Holstein
Barry R Holstein
The Feynman propagator for the harmonic oscillator is evaluated by a variety of path-integral-based means.
Answer To Question #76. Neutrino Mass And Helicity, Br Holstein
Answer To Question #76. Neutrino Mass And Helicity, Br Holstein
Barry R Holstein
No abstract provided.
The Linear Potential Propagator, Br Holstein
The Linear Potential Propagator, Br Holstein
Barry R Holstein
The Feynman propagator for the case of a linear potential is evaluated by a variety of means.
Answer To Question #26. Electromagnetic Field Momentum, Br Holstein
Answer To Question #26. Electromagnetic Field Momentum, Br Holstein
Barry R Holstein
No abstract provided.
Understanding Alpha Decay, Br Holstein
Understanding Alpha Decay, Br Holstein
Barry R Holstein
The subject of alpha decay is an important part of a course in modern physics, as it provides a clear experimental manifestation of the phenomenon of barrier penetration. The traditional approach, based on Gamow's complex eigenvalue method, raises a number of questions which can be answered by employing the older but less well-known procedure of summing over scattering states. Additional insights are gained by examination of the alpha decay system via more contemporary path integral based techniques.
Quark Masses And Binding-Energy In A Proton - Answer To Question Number-2a, Br Holstein
Quark Masses And Binding-Energy In A Proton - Answer To Question Number-2a, Br Holstein
Barry R Holstein
No abstract provided.
Anomalies For Pedestrians, Br Holstein
Anomalies For Pedestrians, Br Holstein
Barry R Holstein
The subject of anomalies, i.e., quantum mechanical symmetry breaking, is addressed using only basic quantum mechanics. Examples from different areas of physics are examined
Study Of The Violation Of Parity In Nuclear Beta-Decay Via A Relative Beta-Polarization Measurement With Polarized In-107 Nuclei, N Severijns, R Prieels, M Allet, J Camps, P Demoor, J Deutsch, F Gimenonogues, Br Holstein, Bh King, O Naviliatcuncici, I Pepe, Pa Quin, P Schuurmans, R Siebelink, W Vanderpoorten, J Vanhaverbeke, L Vanneste, J Wouters
Study Of The Violation Of Parity In Nuclear Beta-Decay Via A Relative Beta-Polarization Measurement With Polarized In-107 Nuclei, N Severijns, R Prieels, M Allet, J Camps, P Demoor, J Deutsch, F Gimenonogues, Br Holstein, Bh King, O Naviliatcuncici, I Pepe, Pa Quin, P Schuurmans, R Siebelink, W Vanderpoorten, J Vanhaverbeke, L Vanneste, J Wouters
Barry R Holstein
No abstract provided.
Quantum Correlations And 3 Body Decays At A Phi-Factory, Jf Donoghue, Br Holstein, Af Perez
Quantum Correlations And 3 Body Decays At A Phi-Factory, Jf Donoghue, Br Holstein, Af Perez
Barry R Holstein
No abstract provided.
Chiral Invariance And Electroweak Interactions Of Pions And Kaons, Br Holstein
Chiral Invariance And Electroweak Interactions Of Pions And Kaons, Br Holstein
Barry R Holstein
Electroweak interactions of pions and kaons are studied in the context of chiral perturbation theory. We demonstrate that the effective Lagrangian framework allows a consistent and predictive picture of such processes as well as a succinct way in which to represent the many previous studies of these reactions which have been performed using chiral models.
Observability Of The Anapole Moment And Neutrino Charge Radius, Mj Musolf, Br Holstein
Observability Of The Anapole Moment And Neutrino Charge Radius, Mj Musolf, Br Holstein
Barry R Holstein
The properties of the neutrino charge radius (NCR) and anapole moments (AM's) of elementary fermions, nucleons, and nuclei are discussed. The dependence of these off-shell electromagnetic couplings on the weak gauge parameter is explicitly demonstrated by a calculation performed in the Rξ gauge. The gauge dependence of the AM's and NCR implies that they cannot be observed in isolation from other second-order, electroweak effects. It is shown, however, that the AM's of various hadronic systems having an SU(2)L quantum number TL3=0 can be considered ``observables'' in certain formal, though unphysical, limits. It is argued that, apart from these special limits, …
The Zero Momentum Limit Of The Vacuum Polarization At Finite Temperature, Ps Gribosky, Br Holstein
The Zero Momentum Limit Of The Vacuum Polarization At Finite Temperature, Ps Gribosky, Br Holstein
Barry R Holstein
We examine the zero momentum limit of the finite temperature vacuum polarization for a quantized scalar field coupled to a classical external field. Ordinarily, this type of Feynman diagram is plagued by nonanalytic behaviour when the external momentum tends to zero. Using imaginary-time, we show that this behaviour is not present in an exact background field solution and how the Feynman diagram calculation may be trivially modified to match the exact solution. Comparisons with recent real-time results are also made.
Radiative K13 Decays And Chiral Symmetry, Br Holstein
Radiative K13 Decays And Chiral Symmetry, Br Holstein
Barry R Holstein
No abstract provided.
Kaon Transitions And Predictions Of Chiral Symmetry, Jf Donoghue, Br Holstein
Kaon Transitions And Predictions Of Chiral Symmetry, Jf Donoghue, Br Holstein
Barry R Holstein
We describe a set of kaonic electromagnetic and semileptonic weak decay processes which are completely predicted within the framework of chiral symmetry (and, therefore, of low-energy QCD), emphasizing where present problems exist and suggesting future experiments.
The Adiabatic Propagator, Br Holstein
The Adiabatic Propagator, Br Holstein
Barry R Holstein
The Feynman propagator is expanded in the adiabatic limit, wherein the time scale over which the potential varies is long compared to typical quantum mechanical oscillation times in the problem. Comparison with known exact results is made for two simple models.
The Adiabatic Theorem And Berry's Phase, Br Holstein
The Adiabatic Theorem And Berry's Phase, Br Holstein
Barry R Holstein
A study is presented of Berry's observation that when a quantum-mechanical system is transported on a closed adiabatic journey, a topological phase arises in addition to the usual dynamical phase expected from the adiabatic theorem. Consequences are explored in the case of a simple magnetic moment-magnetic field interaction and are shown to lead, among other things, to Dirac's famous relation between electric and magnetic charges.
Constraints On Left-Right-Symmetric Models From Neutron Decay, As Carnoy, J Deutsch, Br Holstein
Constraints On Left-Right-Symmetric Models From Neutron Decay, As Carnoy, J Deutsch, Br Holstein
Barry R Holstein
The implications for left-right-symmetric models of recent neutron-β-decay asymmetry and lifetime measurements are analyzed. The significance of forthcoming high-precision lifetime measurements is stressed.
Gauge-Invariance And Quantization, Br Holstein
Gauge-Invariance And Quantization, Br Holstein
Barry R Holstein
Quantizing theories such as quantum electrodynamics that contain a gauge invariance are discussed via a simple pedagogical example. Canonical and path integral quantization methods are compared.
Semiclassical Treatment Of The Double Well, Br Holstein
Semiclassical Treatment Of The Double Well, Br Holstein
Barry R Holstein
The double well potential V(x)= 1/4 λ(x2-α2)2 is addressed using both semiclassical path integral and instanton techniques. The basic physics of the two-state system is shown to arise, and energy levels calculated via the two methods are compared.