Correspondence principle in quantum gravity

The problem of consistent formulation of the correspondence principle in quantum gravity is considered. The usual approach based on the use of the two-particle scattering amplitudes is shown to be in disagreement with the classical result of General Relativity given by the Schwarzschild solution. It is shown also that this approach fails to describe whatever non-Newtonian interactions of macroscopic bodies. An alternative interpretation of the correspondence principle is given directly in terms of the effective action. Gauge independence of the \hbar^0 part of the one-loop radiative corrections to the gravitational form factors of the scalar particle is proved, justifying the interpretation proposed. Application to the black holes is discussed.Comment: Talk presented at the international meeting "Quantum Gravity and Spectral Geometry", Naples, July 2001. 4 pages, 1 figur

Dispersive calculation of B_7^{3/2} and B_8^{3/2} in the chiral limit

We show how the isospin vector and axialvector current spectral functions rho_V and rho_A can be used to determine in leading chiral order the low energy constants B_7^{3/2} and B_8^{3/2}. This is accomplished by matching the Operator Product Expansion to the dispersive analysis of vacuum polarization functions. The data for the evaluation of these dispersive integrals has been recently enhanced by the ALEPH measurement of spectral functions in tau decay, and we update our previous phenomenological determination. Our calculation yields in the NDR renormalization scheme and at renormalization scale mu = 2 GeV the values B_7^{3/2} = 0.55 +- 0.07 +- 0.10 and B_8^{3/2} = 1.11 +- 0.16 +- 0.23 for the quark mass values m_s + m = 0.1 GeV.Comment: 16 pages, 1 figur

The reactions \gwl\ and \gzl\ in SU(N)SU(N) strongly interacting theories

Building on recent phenomenology of \gpi, we discuss the expectation for two photon production of longitudinal gauge boson pairs in $SU(N)$ technicolor theories. The treatment involves a matching of dispersive techniques with the methodology of chiral perturbation theory.Comment: 25 LaTeX pages (incl. 10 figures on 7 pages, also in plain LaTeX, also available from the authors in PostScript form via regular E_mail), UMHEP-39

William Thomas Thornton’s family, ancestry, and early years: Some findings from recently discovered manuscripts and letters

The article discusses information about the family, life, and ancestry of economist William Thomas Thornton found in some of his manuscripts and letters. The importance of the lack of information surrounding Thornton\u27s personal life is explored. The available sources on Thornton\u27s life are described, including the book Collected Works of John Stuart Mill, which contains letters between Mill and Thornton. The discovery of the Thornton family letters is discussed and the usefulness of these documents to the study of Thornton\u27s life is also examined

The early economic writings of William Thomas Thornton

The aim of this article is to evaluate Thornton’s early contributions to the great public debates of the mid-Victorian period. Specifically, it reveals his methods for resolving pressing public concerns of the day through the application of the postulates of classical economics. It also highlights the divergence of his conclusions from the orthodox formulations prescribed by some leading classical writers. The remainder of the article is organized as follows. The first section covers briefly Thornton’s views on the causes of and remedies for overpopulation and poverty in rural Britain. Sections 2 and 3 discuss his views, respectively, on the Old Poor Laws and the New Poor Laws. Section 4 reviews his recommendations on the reform of the industrial workplace and factory system. Section 5 covers his views on land tenure reform, with special reference to the so-called Irish land question. The next section presents a variety of responses by leading Victorian figures to Thornton’s early economic writings. It also highlights the pastoral verse he published in the 1850s as a literary device intended to extol the virtues of a bygone agrarian era. Some concluding remarks follow in section 7

We need a minimum standard of living for all citizens if we wish to achieve community cohesion

Many debates about welfare policy rest on implicit or explicit claims about the social ramifications of welfare spending. Matthew Donoghue suggests that community cohesion is a crucial issue to be considered as part of such debates. He argues that individual autonomy, ensured by a minimum standard of living, stands as a necessary condition for community cohesion

Review of \u3cem\u3eWhen the Devil Knocks: The Congo Tradition and the Politics of Blackness in Twentieth-Century Panama\u3c/em\u3e

Roll 91. New York - SLU at St. John's. Image 3 of 20. (28 December, 1953) [PHO 1.91.3]The Boleslaus Lukaszewski (Father Luke) Photographs contain more than 28,000 images of Saint Louis Univrsity people, activities, and events between 1951 and 1970. The photographs were taken by Boleslaus Lukaszewski (Father Luke), a Jesuit priest and member of the University's Philosophy Department faculty

Human tuberculosis - an ancient disease, as elucidated by ancient microbial biomolecules

Tuberculosis is a major cause of death but infected people with effective immunity may remain healthy for years, suggesting long-term coexistence of host and pathogen. Direct detection and characterisation of ancient microbial DNA and lipid biomarkers confirms palaeopathological diagnoses. Archaeological Mycobacterium tuberculosis resembles extant lineages indicating the timescale for evolutionary changes is considerably longer than originally believed. (C) 2009 Elsevier Masson SAS. All rights reserved

The leading chiral electromagnetic correction to the nonleptonic Delta I = 3/2 amplitude in kaon decays

In kaon decay, electromagnetic radiative corrections can generate shifts in the apparent Delta I = 3/2 amplitude of order alpha A_0/A_2 ~ 22 alpha. In order to know the true Delta I = 3/2 amplitude for comparison with lattice calculations and phenomenology, one needs to subtract off this electromagnetic effect. We provide a careful estimate of the electromagnetic shift in the amplitude, which shows that it is smaller than naive expectations, with a fractional shift of delta A_2/A_2 = -0.016 +- 0.01.Comment: 13 pages, 5 figures Revised comments and titl