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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik
MP 8: Quantenfeldtheorie II
MP 8.1: Vortrag
Donnerstag, 20. März 2014, 11:50–12:10, SPA SR125
Un-Casimir effect — •antonia micol frassino1, piero nicolini1, and orlando panella2 — 1Frankfurt Institute for Advanced Studies, Ruth-Moufang-Strasse 1, D-60438 Frankfurt am Main, Germany — 2Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Via A. Pascoli, I-06123 Perugia, Italy
Following a recent conjecture, there could be a sector of the Standard Model that, although massive, can preserve scale invariance properties. The topic has intersected a huge variety of fields, from astrophysics to neutrino physics, AdS/CFT duality and quantum gravity. Such unlike kind of particles (shortly unparticles) has to be weakly interacting with the rest of the Standard Model.
In this talk we present the un-Casimir effect, namely the study of the Casimir energy related to the presence of an un-particle component in addition to the electromagnetic field contribution. We derive this result by considering modifications of the Feynman propagator in the unparticle sector.
The un-Casimir effect offers a reliable testbed for unparticle physics. We find bounds on the unparticle scale that are independent on the effective coupling constant describing the interaction between the scale invariant sector and ordinary matter.