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Where is the ?c?
The ηc is predicted to have a large width (35 MeV) and a high mass near the J/ψ by extrapolating a model consistent with a large class of theories for the interaction that raises the masses of the ηExpand
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Validity of many-body approximation methods for a solvable model: (I). Exact solutions and perturbation theory
In order to test the validity of various techniques and formalisms developed for treating many-particle systems, a model is constructed which is simple enough to be solved exactly in some cases, butExpand
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VALIDITY OF MANY-BODY APPROXIMATION METHODS FOR A SOLVABLE MODEL. III. DIAGRAM SUMMATIONS
Abstract The model N -fermion system studied in two previous papers is reconsidered in order to investigate the range of validity of diagrammatic many-body perturbation theory and various selectiveExpand
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New possibilities for exotic hadrons - anticharmed strange baryons
Abstract A new candidate for an exotic hadron is presented: an anticharmed strange baryon denoted by P cs , a bound state of a nucleon and an F (now called D s ). Theoretical estimates of the bindingExpand
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Lie groups for pedestrians
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Quantum theory of neutrino oscillations for pedestrians: simple answers to confusing questions
A simple rigorous calculation confirms the standard formula and clarifies some confusing difficulties arising in the standard textbook recipe converting the unobserved frequency of time oscillationsExpand
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Quantum Mechanics: New Approaches to Selected Topics
Preface. Polarized Photons for Pedestrians. 1. Polarized photons and quantum theory. Momentum Transfer to Bound Systems and the Mossbauer Effect. 2. The Mossbauer effect. 3. The Mossbauer effect in aExpand
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Theories of non-experiments in coherent decays of neutral mesons
Abstract Many theoretical calculations of subtle coherent effects in quantum mechanics do not carefully consider the interface between their calculations and experiment. Calculations for gedankenExpand
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Magnetic Monopoles and Dipoles in Quantum Mechanics a
The force on and the energy of a ''di-monopole'', which is the limiting case of a dipole made from two monopoles at zero separation and finite magnetic moment, interacting with an externally fixedExpand
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Quantum Mechanics of Neutrino Oscillations - Hand Waving for Pedestrians
Why Hand Waving? All calculations in books describe oscillations in time. But real experiments don't measure time. Hand waving is used to convert the results of a ''gedanken time experiment'' to theExpand
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