다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

[신간의 별자리x] 우리/미술, 그리고 ‘슬픔의 박물관’

Statistical physics has proven to be a fruitful framework to describe phenomena outside the realm of traditional physics. Recent years have witnessed an attempt by physicists to study collective phenomena emerging from the interactions of individuals as elementary units in social structures. A wide list of topics are reviewed ranging from opinion and cultural and language dynamics to crowd behavior, hierarchy formation, human dynamics, and social spreading. The connections between these problems and other, more traditional, topics of statistical physics are highlighted. Comparison of model results with empirical data from social systems are also emphasized.

Statistical physics of social dynamics

We have studied the three quark system in a relativized version of the quark potential model with chromodynamics. With parameters consistent with those of an analogous study of meson spectroscopy we obtain a successful description of the spectrum of baryons. The model naturally explains the apparent absence of spin‐orbit interactions in baryons.

Baryons in a relativized quark model with chromodynamics

Monthly Notices is one of the three largest general primary astronomical research publications. It is an international journal, published by the Royal Astronomical Society. This article 1 describes its publication policy and practice.

Monthly Notices of the Royal Astronomical Society

We argue that the exact degeneracy of vacua in N=1 supergravity can shed light on the smallness of the cosmological constant. The presence of such vacua, which are degenerate to very high accuracy, may also result in small values of the quartic Higgs coupling and its beta function at the Planck scale in the phase in which we live.

On the smallness of the cosmological constant in SUGRA models with Planck scale SUSY breaking and degenerate vacua

We review recent calculations using the quark meson coupling model which should be of particular interest at Jefferson Lab. In particular, we discuss the change in the proton electric and magnetic form factors when it is bound in a specific shell model orbit. Modern quasi-elastic electron scattering experiments should be able to detect effects of the size predicted. We also examine the mean field potential felt by an $\omega$ in a finite nucleus, concluding that the $\omega$ should be bound by between 50 and 100 MeV.

Recent results from QMC relevant to TJNAF

We study the production of Ξ−-hypernuclei, ${^{12}{_{\Xi^-}}}$ Be and ${^{28}{_{\Xi^-}}}$ Mg, via the (K−, K+) reaction within a covariant effective Lagrangian model, employing the bound Ξ− and proton spinors calculated by the latest quark-meson coupling model. The present treatment yields the 0° differential cross sections for the formation of simple s-state Ξ− particle-hole states peak at a beam momentum around 1.0 GeV/c with a value in excess of 1 μb.

Production of Ξ − -Hypernuclei via the ( K − , K + ) Reaction in a Quark-Meson Coupling Model

Proceedings of the workshop on lepton scattering, hadrons and QCD

In generating a charge-symmetry breaking potential using ρ-ω mixing it is usually assumed that the mixing amplitude is constant (at the on-mass-shell value). Since the exchanged meson is actually far off-shell one must question the validity of this assumption. By constructing a simple quark model in which the mixing is generated by the u-d quark mass difference, we find that the assumption seems to be a very poor one.

Anthony W. Thomas

Papers

On the smallness of the cosmological constant in SUGRA models with Planck scale SUSY breaking and degenerate vacua

Recent results from QMC relevant to TJNAF

Production of Ξ − -Hypernuclei via the ( K − , K + ) Reaction in a Quark-Meson Coupling Model

Proceedings of the workshop on lepton scattering, hadrons and QCD

Substructure Effect on ρ-ω Mixing in Charge-Symmetry Violation