Photon-Photon and Photon-Hadron Interactions at Relativistic Heavy Ion Colliders

In central collisions at relativistic heavy ion colliders like the Relativistic Heavy Ion Collider RHIC/Brookhaven and the Large Hadron Collider LHC (in its heavy ion mode) at CERN/Geneva, one aims at detecting a new form of hadronic matter --- the Quark Gluon Plasma. We discuss here a complementary aspect of these collisions, the very peripheral ones. Due to coherence, there are strong electromagnetic fields of short duration in such collisions. They give rise to photon-photon and photon-nucleus collisions with high flux up to an invariant mass region hitherto unexplored experimentally. After a general survey photon-photon luminosities in relativistic heavy ion collisions are discussed. Then photon-photon physics at various gamma-gamma-invariant mass scales is discussed. The region of several GeV, relevant for RHIC is dominated by QCD phenomena (meson and vector meson pair production). Invariant masses of up to about 100 GeV can be reached at LHC, and the potential for new physics is discussed. Lepton-pair production, especially electron-positron pair production is copious. Due to the strong fields there will be new phenomena, especially multiple e+e- pair production.Comment: 10 pages, Proceedings of the Erice Summer School on Heavy Ion Physics 199

Decalogue Five: A Short Film about Killing, Sin, and Community

Decalogue Five tells the story of Waldemar Rekowski (Jan Tesarz), a jaded taxi driver, Piotr Balicki (Krzysztof Globisz), an idealistic, newly-licensed attorney, and Jacek Lazar (Mirosław Baka), a young and troubled drifter, whose lives intersect with one another as a result of fate, or contingent circumstance, or some combination of both. With brutal detail and detachment, the film depicts Jacek’s seemingly aimless wanderings through Warsaw, his senseless killing of Waldemar, his interactions with Piotr (his court-appointed attorney), and his eventual execution after a failed defense in court. Like other films within the Decalogue series, Five illustrates what happens when human beings are forced to confront ethical dilemmas (and thus are forced to confront themselves as responsible moral decision makers) in a world that seems to offer little in the way of moral direction, meaning, purpose, and community with others. Discussing the overarching aim of the Decalogue series as a whole, Krzysztof Kies´lowski refers to the sense of alienation, aimlessness, and loneliness that often describes the human conditio

Can Natural Law Thinking be Made Credible in our Contemporary Context?

One of the best-known members of the United Nations Commission which drafted the 1948 "Universal Declaration of Human Rights," Jacques Maritain, famously held that the "natural rights" or "human rights" possessed by every human being are grounded and justified by reference to the natural law.' In many quarters today, the notion of the natural law, and arguments for a set of natural rights grounded in the natural law, have come under fierce attack. One common line of attack is illustrated by the arguments of some utilitarians, for whom "natural law thinking" is mistaken insofar as it implies that there is an absolute moral prohibition against violating any human being's "natural rights." Even if there is such a thing as "natural rights," these utilitarians argue, such rights - including even the natural "right to life" - are necessarily relational, and thus have meaning only within the context of a larger social whole. As a result, the argument goes, the supposed "natural rights" possessed by individual human beings are never inviolable or unconditional, but instead always negotiable and subject to being "traded away" for the sake of greater social utility. Consider just one alleged counter-example to the notion that there are inviolable or unconditional "natural rights": it is well-known that approximately 36,000 people in the United States die every year as a result of influenza infections or influenza-related complications.' There is little doubt that hundreds, and probably even thousands, of human lives would be saved every year if local governments were to pass laws requiring flu vaccinations for all members of at-risk populations (e.g., the very young and the very elderly). It would seem that there would be broad support for mandated flu vaccinations- no matter what the expense - if human lives would be saved and if the natural "right to life" is inviolable or unconditional.' And yet no such life-saving laws exist, apparently because citizens and legislators believe that the social costs and inconveniences would be too great. According to the utilitarian position, this demonstrates - contrary to what Ronald Dworkin and others say about rights' - that rights do not trump utility, but in fact are quite regularly and reasonably trumped by utility. In light of such contemporary understandings and policies, can natural law thinking about natural rights be made credible? In what follows, I shall argue that utilitarian thinkers are correct to hold that rights are intrinsically relational; but they are wrong to conclude that the relational character of rights entails that "natural rights" are not inviolable or not unconditional

Measuring the W Boson Mass at Hadron Colliders

We discuss the prospects for measuring the W mass in Run II of the Tevatron and at the LHC. The basic techniques used to measure M_W are described and the statistical, theoretical and detector-related uncertainties are discussed in detail.Comment: Latex, 13 pages, 6 figures, 1 table, invited talk presented at the Mini-Workshop ``Electroweak Precision Data and the Higgs Mass'', DESY Zeuthen, Germany, February 28 - March 1, 2003, to appear in the Proceeding

The Language of Rights: Towards an Aristotelian-Thomistic Analysis

Alasdair MacIntyre has argued that our contemporary discourse about “rights,” and “natural rights” or “human rights,” is alien to the thought of Aristotleand Aquinas. His worry, it seems, is that our contemporary language of rights is often taken to imply that individuals may possess certain entitlement-conferringproperties or powers entirely in isolation from other individuals, and outside the context of any community or common good. In thispaper, I accept MacIntyre’s worries about our contemporary language of “rights”; however, I seek to show that some of our contemporary language or discourseabout “justice” and “rights” is not altogether misguided, but does—in fact—reflect a properly critical understanding of what is meant by“justice” and “rights.

A Conversation With Hans-georg Gadamer

By way of engagement with the thought of Plato, Aristotle, Aquinas, Heidegger, Lonergan, and neo-Thomism more broadly, Michael Baur and Gadamer discuss historicity, the Enlightenment and scientism, the epistemic implications of hylomorphism, and the nature of human finitude and death

“The Authority to Interpret, the Purpose of Universities, and the Giving of Awards, Honors, or Platforms by Catholic Universities: Some Thoughts on ‘Catholics in Political Life’,”

With its June 2004 statement Catholics in Political Life, the United States Conference of Catholic Bishops opened an important and far-reaching discussion about how Catholic individuals ought to comport themselves in political life, and-indirectly-about how Catholic institutions-including Catholic law schools-ought to decide whether or not to give awards, honors, or platforms to those whose views about key moral and political issues may differ from the views expressed in the teachings of the Catholic Church. On the basis of a simple and straightforward reading of the 2004 statement, it might appear that the bishops wanted to say that no Catholic institution-and thus no Catholic law school-should give awards, honors, or platforms to those who endorse or promote views that differ from the fundamental moral teachings of the Church. An important part of the statement plainly declares: "The Catholic community and Catholic institutions should not honor those who act in defiance of our fundamental moral principles. They should not be given awards, honors or platforms which would suggest support for their actions." A few moments of reflection will reveal, however, that the issue here is somewhat more complicated than what one might infer from a simple and straightforward reading of the statement. The aim of the present paper is not to settle the question of whether and how a Catholic law school ought to give awards, honors, or platforms to certain individuals or groups. Instead, the aim is to begin articulating some of the underlying conceptual issues that perhaps ought to be addressed in preparation for answering the further question of whether and how a Catholic law school ought to give awards, honors, or platforms to certain individuals or groups