Particle Correlations at LEP

Particle correlations are extensively studied to obtain information about the dynamics of hadron production. From 1989 to 2000 the four LEP collaborations recorded more than 16 million hadronic Z0 decays and several thousand W+W- events. In Z0 decays, two-particle correlations were analysed in detail to study Bose-Einstein and Fermi-Dirac correlations for various particle species. In fully-hadronic W+W- decays, particle correlations were used to study whether the two W bosons decay independently. A review of selected results is presented.Comment: To appear in the proceedings of the first High-Energy Physics Conference in Madagascar (HEP-MAD'01), Antananarivo, Madagascar, 27 Sep - 5 Oct 2001 OPAL conference report CR48

Polarization and Spin Alignment in Multihadronic Z0 Decays

The large statistics of millions of hadronic Z0 decays, accumulated by the four LEP experiments between 1989 and 1995, allowed for detailed investigations of the fragmentation process. Inclusive Lambda_b baryons and Lambda hyperons at intermediate and high momentum have been found to show longitudinal polarization. This may be related to the primary quark and antiquark polarization and the hadronization mechanism which produces the leading baryons. Helicity density-matrix elements have been measured for a variety of vector mesons produced inclusively in hadronic Z0 decays. The diagonal elements of some of the light mesons and the D*+- show a preference for a helicity-zero state if the meson carries a large fraction of the available energy. The mechanism which produces such spin alignment in the non-perturbative hadronization of the primary partons to the vector mesons is so far unexplained. For the B* the results are consistent with no spin alignment, which is expected in a picture based on HQET. For some meson species non-diagonal elements have been measured indicating coherence phenomena due to final-state interaction between the primary quark and antiquark.Comment: Jan 2001. 6pp. To be published in the proceedings of 30th International Symposium on Multiparticle Dynamics (ISMD 2000), Tihany, Lake Balaton, Hungary, 9-15 Oct 2000 ;updated version: minor stylistic modifications as suggested by the edito

Particle Correlations in Z and WW Events

Important information about the dynamics of hadron production can be obtained by the study of particle correlations. More than 16 million hadronic Z0 decays and several thousand W+W- events have been recorded from the four LEP collaborations between 1989 and 2000. Recently, in Z0 decays, new results of Bose-Einstein correlations in pairs of pions and Fermi-Dirac correlations for antiproton pairs were reported. In fully-hadronic W+W- decays particle correlations were used to study whether the two W bosons decay independently.Comment: To appear in the proceedings of XXXVIIth Rencontres de Moriond: QCD and High Energy Hadronic Interactions, March 16-23, 2002, Les Arcs, Franc

University Scholar Series: Monika Kress

Meteorites and the Origin of Habitable Worlds On November 30, 2011, Dr. Monika Kress spoke in the University Scholar Series hosted by Provost Gerry Selter at the Dr. Martin Luther King, Jr. Library. Monika Kress is an Associate Professor of Physics and Astronomy at SJSU and also a member of the NASA Astrobiology Institute\u27s Virtual Planetary Laboratory. In this seminar, she presents the theory of solar system formation, focusing on meteorites. Dr. Kress also describes a first-hand account of how meteorites are recovered from the most fertile meteorite-hunting ground on Earth: Antarcticahttps://scholarworks.sjsu.edu/uss/1010/thumbnail.jp

A Copyright Right of Publicity

This Article identifies a striking asymmetry in the law’s disparate treatment of publicity-rights holders and copyright holders. State-law publicity rights generally protect individuals from unauthorized use of their name and likeness by others. Publicity-claim liability, however, is limited by the First Amendment’s protection for expressive speech embodying a “transformative use” of the publicity-rights holder’s identity. This Article examines for the first time a further limitation imposed by copyright law: when a publicity-rights holder’s identity is transformatively depicted in a copyrighted work without consent, the author’s copyright can produce the peculiar result of enjoining the publicity-rights holder from using or engaging in speech about her own depiction. This Article offers novel contributions to the literature on copyright overreach and: (1) identifies a legal asymmetry produced in the interplay of publicity rights, copyright law, and the First Amendment; (2) examines the burdens on constitutionally protected speech, autonomy, and liberty interests of publicity-rights holders when copyright law prevents or constrains use of their own depiction; and (3) outlines a framework for recognizing a “copyright right of publicity” to exempt the publicity-rights holder’s use from copyright infringement liability. Notably, this Article contributes uniquely to the literature by revealing new insights gained from an exclusive first-hand perspective of an internationally recognized celebrity whose persona was prominently depicted without prior notice or consent in a wide-release feature film

Causation and the Law: Preemption, Lawful Sufficiency, and Causal Sufficiency

This article briefly describes the normative/nonnormative distinction, and how one might invoke this distinction to locate a nonnormative dimension of actual causation. After briefly introducing Richard Wright\u27s concept of a necessary element in a set of conditions for an effect, the article notes ambiguities in the critical concepts of necessity and sufficiency that he deploys. The article suggests the most plausible interpretation of Wright\u27s use of different modal concepts

The inverse electromagnetic scattering problem in a piecewise homogeneous medium

This paper is concerned with the problem of scattering of time-harmonic electromagnetic waves from an impenetrable obstacle in a piecewise homogeneous medium. The well-posedness of the direct problem is established, employing the integral equation method. Inspired by a novel idea developed by Hahner [11], we prove that the penetrable interface between layers can be uniquely determined from a knowledge of the electric far field pattern for incident plane waves. Then, using the idea developed by Liu and Zhang [21], a new mixed reciprocity relation is obtained and used to show that the impenetrable obstacle with its physical property can also be recovered. Note that the wave numbers in the corresponding medium may be different and therefore this work can be considered as a generalization of the uniqueness result of [20].Comment: 19 pages, 2 figures, submitted for publicatio