Peter Arnold

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Scenarios for electroweak baryogenesis require an understanding of the effective potential at finite temperature near a first-order electroweak phase transition. Working in Landau gauge, we present a calculation of the dominant two-loop corrections to the ring-improved one-loop potential in the formal limit g 4 ≪ λ ≪ g 2 , where λ is the Higgs self-coupling(More)
Many aspects of high-temperature gauge theories, such as the electroweak baryon number violation rate, color conductivity, and the hard gluon damping rate, have previously been understood only at leading logarithmic order (that is, neglecting effects suppressed only by an inverse logarithm of the gauge coupling). We discuss how to systematically go beyond(More)
A proper sequence of effective theories, corresponding to larger and larger distance scales, is crucial for analyzing real-time equilibrium physics in hot non-Abelian plasmas. For the study of color dynamics (by which I mean physics involving long wavelength gauge fluctuations), an important stepping stone in the sequence of effective theories is to have a(More)
It has recently been argued that the rate per unit volume of baryon number violation (topological transitions) in the hot, symmetric phase of electroweak theory is of the form η α 5 w T 4 in the weak-coupling limit, where η is a non-perturbative numerical coefficient. Over the past several years, there have been attempts to extract the rate of baryon number(More)
OBJECTIVES To examine the effect of demographic change on employment patterns for general practitioners, medical specialists and nurses since 1986, and to compare their patterns of retirement. DESIGN AND SETTING Secondary analysis of previously unpublished Australian Bureau of Statistics Census data for the years 1986, 1991, 1996 and 2001. MAIN OUTCOME(More)
The non-Abelian analog of electrical conductivity at high temperature has previously been known only at leading logarithmic order: that is, neglecting effects suppressed only by an inverse logarithm of the gauge coupling. We calculate the first sub-leading correction. This has immediate application to improving, to next-to-leading log order, both effective(More)
OBJECTIVE To investigate whether late referral to a nephrologist of patients with chronic renal insufficiency influences the likelihood of both transplantation and mortality among those who survive at least one year on dialysis. DESIGN Retrospective national cohort study, using data from the Australia and New Zealand Dialysis and Transplant Registry(More)