We present preliminary results of the first π interferometry (HBT) excitation function at intermediate AGS energies. The beam energy evolution of the correlations' dependence on m T , centrality, and emission angle with respect to the reaction plane are discussed. Comparisons with predictions of the RQMD cascade model are made. Two-particle intensity interferometry (HBT) measurements have long been used to study the geometry and dynamics of heavy ion collisions (see, e.g. [1]). Pion correlation functions are sensitive to the pion source size, shape, decay-time, and long-lived particle (e.g. Λ) production. In addition, dynamic effects such as flow produce space-momentum correlations resulting in dependences of the correlation functions on π momentum.In this paper, we discuss an excitation function (2-8 AGeV) of π − HBT measurements. Studying the evolution of the correlations as a function of E beam is important for two reasons. Firstly, a sudden increase, at some E beam , in the lifetime of the hadronic fireball has long been proposed as a robust signal of the onset of QGP formation [2][3][4]. Secondly, the sensitivity of correlation functions to the underlying physics makes such measurements potent tools to test the dynamics of microscopic models of heavy ion collisions. Many models attempt to extrapolate to the RHIC energies. Confidence in the ability to extrapolate (determined by the correct underlying physics and its evolution with energy) would be enhanced if the model reproduces an excitation function of detailed HBT systematics.Using the large-acceptance EOS Time Projection Chamber [5] the E895 collaboration measured charged particles from Au+Au collisions at 2, 4, 6, and 8 AGeV at the Brookhaven AGS. Good particle identification minimized e − contamination of the π − sample. Momentum resolution, largely due to multiple Coulomb scattering and straggling in the 3% interaction length target, was on the order of 1.5-3%. The experimental correlation functions have been corrected for the momentum resolution with an iterative method similar to that employed by the NA44 collaboration [6]. This correction typically increases the fitted λ parameter by 15%, and the radii by 5%.Track merging and splitting effects were eliminated by a two-track geometrical cut based on the tracking algorithm. As expected, this cut discards some pairs (in the "real" and event-mixed distributions) at low relative momentum, q. However, due to detector geometry, this cut preferentially discards low-q pairs at high p T ; thus, to minimize phasespace bias effects, we restrict our analysis to low p T and use narrow windows in p T .A full Coulomb-wave integration [7,8] over a spatial source of 5-fm Gaussian radius was used to generate the Coulomb correction, which was applied pair-wise to the event-mixed
This article addresses limitations in the scholarship on the Edwardian editions of the Book of Common Prayer (1549 and 1552) and contributes to the growing body of research on early modern technical communication by approaching the Prayer Book as technical writing for a primarily oral–aural culture. I examine three sample texts from the Prayer Book to showcase their oral qualities and how these oral qualities contribute to the utility of the book. This examination shows that the Prayer Book played a role in the development of technical writing in the early modern period and that its oral features contribute to the success of its technical aims.
This article explores the catechism in the Book of Common Prayer, shedding light on the emergence of instructional writing from oral instruction. The 1549 text evinces qualities of preliterate oral communication identified by Ong. By contrast, the 1604 addendum reveals a trend toward modern plain style, which is even more pronounced in the 1647 Westminster Shorter Catechism. The evidence indicates the oral features were useful to the text’s technical aims. What Ramist plain style gains in precision and objectivity comes at the cost of other useful features, such as reiteration, contextualization, and agonism, which (in Tannen's phrase) involve a greater relative focus on interpersonal involvement between speaker and auditor/ reader.
Many Episcopal liturgists argue for the elimination of confirmation. This essay explores the reformed rite of confirmation, the doctrine of the Book of Common Prayer (1979), and considers objections to the rite involving its relationship to the sacraments of baptism and communion. I argue that it is a nuanced application of the New Testament's teaching on baptism to a context in which infant baptism is normative. The supposed redundancy and theological untidiness of confirmation prove, in fact, to be its strength.
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