[Book Review] D. Xygalatas, The Burning Saints: Cognition and Culture in the Fire-Walking Rituals of the Anastenaria

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Historicity and Anthropology

Historicity has emerged within anthropology to refer to cultural perceptions of the past. It calls attention to the techniques such as rituals that people use to learn about the past, the principles that guide them, and the performances and genres in which information about the past can be presented. The concept is in essential tension with the meaning of the term as “factuality” within the discipline of history and in wider society. Anthropologists also sometimes compose histories within this Western paradigm, but historicity in anthropology orientates a different objective, namely to discover the ways (beyond Western historicism) in which people, whether within or outside the West, construe and represent the past. Historicity, which is grounded in a notion of temporality, offers a framework for approaching time as nonlinear and may thus be suited to studying other histories without fundamentally measuring how well they conform to Western history

Non-global Structure of the O({\alpha}_s^2) Dijet Soft Function

High energy scattering processes involving jets generically involve matrix elements of light- like Wilson lines, known as soft functions. These describe the structure of soft contributions to observables and encode color and kinematic correlations between jets. We compute the dijet soft function to O({\alpha}_s^2) as a function of the two jet invariant masses, focusing on terms not determined by its renormalization group evolution that have a non-separable dependence on these masses. Our results include non-global single and double logarithms, and analytic results for the full set of non-logarithmic contributions as well. Using a recent result for the thrust constant, we present the complete O({\alpha}_s^2) soft function for dijet production in both position and momentum space.Comment: 55 pages, 8 figures. v2: extended discussion of double logs in the hard regime. v3: minor typos corrected, version published in JHEP. v4: typos in Eq. (3.33), (3.39), (3.43) corrected; this does not affect the main result, numerical results, or conclusion

Uncanny History: Temporal Topology in the Post-Ottoman World

Post-Ottoman temporal topologies—cases where the past, present, and future may be bent around one another rather than ordered linearly—may produce uncanny histories. The uncanny is activated, as Freud noted, when something secret comes to light, but also when the expectations of a given genre are exceeded. In these cases, the genre of historicism has been violated. Rather than contending that the post-Ottoman world is entirely different from Western Europe, the examples here alert one to the presence of uncanny histories in many other places since historicism has nowhere managed to eradicate its alternatives. Unsettled pasts of violence and displacement and presents beset by ongoing tensions (political, economic, religious/ethnic) do contribute, however, to a particular vitality and saliency of uncanny histories in the post-Ottoman sphere

Fully-Unintegrated Parton Distribution and Fragmentation Functions at Perturbative k_T

We define and study the properties of generalized beam functions (BFs) and fragmenting jet functions (FJFs), which are fully-unintegrated parton distribution functions (PDFs) and fragmentation functions (FFs) for perturbative k_T. We calculate at one loop the coefficients for matching them onto standard PDFs and FFs, correcting previous results for the BFs in the literature. Technical subtleties when measuring transverse momentum in dimensional regularization are clarified, and this enables us to renormalize in momentum space. Generalized BFs describe the distribution in the full four-momentum k_mu of a colliding parton taken out of an initial-state hadron, and therefore characterize the collinear initial-state radiation. We illustrate their importance through a factorization theorem for pp -> l^+ l^- + 0 jets, where the transverse momentum of the lepton pair is measured. Generalized FJFs are relevant for the analysis of semi-inclusive processes where the full momentum of a hadron, fragmenting from a jet with constrained invariant mass, is measured. Their significance is shown for the example of e^+ e^- -> dijet+h, where the perpendicular momentum of the fragmenting hadron with respect to the thrust axis is measured.Comment: Journal versio

The Quark Beam Function at NNLL

In hard collisions at a hadron collider the most appropriate description of the initial state depends on what is measured in the final state. Parton distribution functions (PDFs) evolved to the hard collision scale Q are appropriate for inclusive observables, but not for measurements with a specific number of hard jets, leptons, and photons. Here the incoming protons are probed and lose their identity to an incoming jet at a scale \mu_B << Q, and the initial state is described by universal beam functions. We discuss the field-theoretic treatment of beam functions, and show that the beam function has the same RG evolution as the jet function to all orders in perturbation theory. In contrast to PDF evolution, the beam function evolution does not mix quarks and gluons and changes the virtuality of the colliding parton at fixed momentum fraction. At \mu_B, the incoming jet can be described perturbatively, and we give a detailed derivation of the one-loop matching of the quark beam function onto quark and gluon PDFs. We compute the associated NLO Wilson coefficients and explicitly verify the cancellation of IR singularities. As an application, we give an expression for the next-to-next-to-leading logarithmic order (NNLL) resummed Drell-Yan beam thrust cross section.Comment: 54 pages, 9 figures; v2: notation simplified in a few places, typos fixed; v3: journal versio

[Translation] Crisis of Presence and Religious Reintegration by Ernesto de Martino. Translated and with a Foreword by Charles Stewart and Tobia Farnetti

This article is a translation of Ernesto de Martino’s “Crisi della presenza e reintegrazione religiosa,” which originally appeared in Aut Aut 31 (1956). De Martino’s publications combine social scientific methods and interrogatives with deep humanistic learning in philosophy, history, and literature. Drawing on materials from Greek tragedy, the Icelandic Poetic Edda, and ethnographic reports from Australia, this article illuminates one of de Martino’s most central and enduring ideas: the “crisis of presence,” a momentary failure of the Hegelian synthesis according to which the givens of the past and the present should become something novel in the future. Philosophically robust and ethnographically informed, this newly translated text will inspire a new generation of anthropologists in the English-speaking world and help initiate a new appreciation for the work of Ernesto de Martino

Traumatic brain injury: Age at injury influences dementia risk after TBI

Traumatic brain injury (TBI) is increasingly recognized as a risk factor for dementia. New data provide further support for this association and demonstrate the influence of age at injury and injury severity on dementia risk after TBI, revealing that even mild TBI increases dementia risk in those aged ≥65 years