36 research outputs found
Nonperturbative proof of the non-Abelian anomalies
No full textWe give a nonperturbative derivation of non-Abelian anomalies
Geographic profiling in Nazi Berlin: fact and fiction
No full textGeographic profiling uses the locations of connected crime sites to make inferences about the probable location of the offender’s ‘anchor point’ (usually a home, but sometimes a workplace). We show how the basic ideas of the method were used in a Gestapo investigation that formed the basis of a classic German novel about domestic resistance to the Nazis during the Second World War. We use modern techniques to re-analyse this case, and show that these successfully locate the Berlin home address of Otto and Elise Hampel, who had distributed hundreds of anti-Nazi postcards, after analysing just 34 of the 214 incidents that took place before their arrest. Our study provides the first empirical evidence to support the suggestion that analysis of minor terrorism-related acts such as graffiti and theft could be used to help locate terrorist bases before more serious incidents occur
Generalized Bohr-Sommerfeld rules for anomalies with applications to symmetry breakdown and decoupling
No full textIn the presence of anomalies, the requirement that a classical symmetry group G has a proper action on the fermion measure or in the effective Lagrangian description imposes Bohr-Sommerfeld conditions on the anomalies, and often implies that G is broken to a subgroup H as well. We show these results in this paper and apply them to QCD and SU(5). In particular, constraints on the QCD order parameter are derived, and an argument is presented which suggests that the breakdown of the chiral flavor symmetry and the emergence of some sort of generation structure in QCD may be natural
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Relational databases for RHIC design and control
No full textThe preliminary organization of data via relational databases for the design and control of the Relativistic Heavy Ion Collider (RHIC) is described
Coloured Monopoles From Fractional Charges in OCD
No full textIn a recent paper, Slansky et al. have suggested that SU(3)c may be broken to SO(3) X Z, in order to explain the possible existence of fractionally charged states. We point out that there are low mass monopoles associated with such a symmetry breakdown and discuss their properties. Such states may be observable at LEP if not at PETRA energies
Aspects of duality in chiral field theories
No full textThe Abelian and non-Abelian gauge potentials Auv are known to describe chiral fields. Here we study their interactions with dual extended objects. The region occupied by these objects is shown to behave like a distinct phase of chiral fields which is nondissipative under suitable geometric conditions. A method for the realization of the \u27t Hooft algebra in these systems is outlined. The concept of electric and magnetic duality in electromagnetism is generalized to chiral fields with values in a symmetric space
Field Quality Evaluation Of The Superconducting Magnets Of The Relativistic Heavy Ion Collider
No full textIn this paper, we first present the procedure established to evaluate the field quality, quench performance, 1 and alignment of the superconducting magnets manufactured for the Relativistic Heavy Ion Collider (RHIC), 2 and then discuss the strategies used to improve the field quality 3 and to minimize undesirable effects by sorting the magnets. The field quality of the various RHIC magnets is briefly summarized. I. INTRODUCTION The RHIC magnet system 2 consists primarily of the superconducting dipole, quadrupole, sextupole and corrector magnets for guiding, focusing, and correcting the counter-circulating ion beams into the design orbits in the regular arcs of the machine lattice. A large complement of special magnets is also required for steering the beams into collisions at the six interaction regions where the ion beams interact. Besides reaching fields with substantial margins above the required range, all of the RHIC magnets must meet stringent requirements on field qua..
