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 discuss the saturation mechanism for the nuclear matter equation of state in a chiral effective quark theory. The importance of the scalar polarizability of the nucleon is emphasized. The phase transition to color superconducting quark matter is also discussed.

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On the equation of state in effective quark theories

The calculation of the strangeness content of the nucleon and its experimental verification is a fundamental step in establishing non-perturbative QCD as the correct theory describing the structure of hadrons. It holds a role in QCD analogous to the correct calculation of the Lamb shift in QED. We review the latest developments in the vector and scalar matrix elements of the strange quarks in the proton, where there has recently been considerable progress.

Overview of Issues Surrounding Strangeness in the Nucleon

We explore further the idea that the lattice QCD data for hadron properties in the region m_\pi^2 > 0.2 GeV^2 can be described by the constituent quark model. This leads to a natural explanation of the fact that nucleon excited states are generally stable for pion masses greater than their physical excitation energies. Finally we apply these same ideas to the problem of how pentaquarks might behave in lattice QCD, with interesting conclusions.

Baryon Spectroscopy and the Constituent Quark Model

We revisit the constraints on the parameter space for dark photons arising from electroweak precision observables in light of the recent W boson mass anomaly reported by the CDF Collaboration. We also extend previous work by placing the first electroweak precision observable constraints on the coupling of dark photons to the fermionic dark matter sector.

Constraints on the dark sector from electroweak precision observables

We calculate the direct CP violating asymmetry parameter, a CP , for B → π + π − π and B → π + π − K decays, in the case where ρ 0 − ω mixing eﬀects are taken into account. We ﬁnd that the direct CP asymmetry for B − → π + π − π − , ¯ B 0 → π + π − π 0 , B − → π + π − K − and ¯ B 0 → π + π − ¯ K 0 , reaches its maximum when the invariant mass π + π − is in the vicinity of the ω meson mass. The inclusion of ρ 0 − ω mixing provides an opportunity to erase, without ambiguity, the phase uncertainty mod( π ) in the determination of the CKM angles α in case of b → u and γ in case of b → s .

Anthony W. Thomas

Papers

On the equation of state in effective quark theories

Overview of Issues Surrounding Strangeness in the Nucleon

Baryon Spectroscopy and the Constituent Quark Model

Constraints on the dark sector from electroweak precision observables

Direct CP violation in B → ρ 0 ( ω ) P S