Subluminal OPERA Neutrinos

The OPERA collaboration has announced to have observed superluminal neutrinos with a mean energy 17.5 GeV, but afterward the superluminal interpretation of the OPERA results has been refuted theoretically by Cherenkov-like radiation and pion decay. In a recent work, we have proposed a kinematical resolution to this problem. A key idea in our resolution is that the OPERA neutrinos are not superluminal but subluminal since they travel faster than the observed speed of light in vacuum on the earth while they do slower than the true speed of light in vacuum determining the causal structure of events. In this article, we dwell upon our ideas and present some concrete models, which realize our ideas, based on spin 0, 1 and 2 bosonic fields. We also discuss that the principle of invariant speed of light in special relativity can be replaced with the principle of a universal limiting speed.Comment: 17 page

Astrophysical consequences of the OPERA superluminal neutrino

A simple discussion of the recent OPERA result on the apparent critical speed of the muon neutrino is presented. We point out in particular some of the possible consistency problems of such an interpretation of the OPERA data with respect to well-established astrophysical observations.Comment: 3 page

Stefan Themerson’s Opera (St. Francis & The Wolf of Gubbio or Brother Francis’ Lamb Chops)

The paper focuses on the experimental work of Stefan Themerson (St. Francis and The Wolf of Gubbio or Brother Francis’ Lamb Chops, an Opera in 2 Acts, text and music by Stefan Themerson, drawings by Franciszka Themerson, De Harmonie – Gaberbocchus Press, Amsterdam–London 1972) and the question of intermediality in general. An interpretation of the ‘semantic opera’ (written in 1954–1960, as a continuation of Semantic Divertissements [1962] and factor T [1956]), places Themerson’s idea in the context of the aesthetics of intermediality. The author signals a terminological confusion connected with the understanding of St. Francis and The Wolf of Gubbio (semantic opera; hybrid work; intermedial work, etc.) and argues that the aesthetics of intermediality appear to be an important and inspiring context for the interpretation of Themerson’s text and life. In this case, considerations on the subject of textuality show, on the one hand, different relations between literature, painting, music and theatre (artistic intermediality), and, on the other, the phenomenon of intermediality as the aesthetics of existence

The Paramount Role of Translation in Modern Opera Productions

Opera is undoubtedly a particularly high and traditional genre of art, but recently there have been numerous attempts at breaking this stereotype and presenting opera in a contemporary light. The most popular way of achieving this aim is either staging modernized opera productions, i.e. transferring their plot from their traditional setting to the here and now, or considerably changing their interpretation. Staging modernized productions involves, first of all, the issue of stage design, and an alteration in the traditional interpretation is mostly created by acting, but nowadays it is also the translation shown in the form of surtitles that creates the significance of operatic productions

Het is de vrijheid die ons leidt: over de hoop in een duister sprookje

The article offers an interpretation of Tchaikovsky's seldom played and elusive opera "The sorceress". The main argument states that the opera should be seen as a fairy tale rather than a psychological drama and that the main focus lies on the idea of sexual liberty

A search for the analogue to Cherenkov radiation by high energy neutrinos at superluminal speeds in ICARUS

The OPERA collaboration has claimed evidence of superluminal {\nu}{_\mu} propagation between CERN and the LNGS. Cohen and Glashow argued that such neutrinos should lose energy by producing photons and e+e- pairs, through Z0 mediated processes analogous to Cherenkov radiation. In terms of the parameter delta=(v^2_nu-v^2_c)/v^2_c, the OPERA result implies delta = 5 x 10^-5. For this value of \delta a very significant deformation of the neutrino energy spectrum and an abundant production of photons and e+e- pairs should be observed at LNGS. We present an analysis based on the 2010 and part of the 2011 data sets from the ICARUS experiment, located at Gran Sasso National Laboratory and using the same neutrino beam from CERN. We find that the rates and deposited energy distributions of neutrino events in ICARUS agree with the expectations for an unperturbed spectrum of the CERN neutrino beam. Our results therefore refute a superluminal interpretation of the OPERA result according to the Cohen and Glashow prediction for a weak current analog to Cherenkov radiation. In particular no superluminal Cherenkov like e+e- pair or gamma emission event has been directly observed inside the fiducial volume of the "bubble chamber like" ICARUS TPC-LAr detector, setting the much stricter limit of delta < 2.5 10^-8 at the 90% confidence level, comparable with the one due to the observations from the SN1987A.Comment: 17 pages, 6 figure

The Hypothesis of Superluminal Neutrinos: comparing OPERA with other Data

The OPERA Collaboration reported evidence for muonic neutrinos traveling slightly faster than light in vacuum. While waiting further checks from the experimental community, here we aim at exploring some theoretical consequences of the hypothesis that muonic neutrinos are superluminal, considering in particular the tachyonic and the Coleman-Glashow cases. We show that a tachyonic interpretation is not only hardly reconciled with OPERA data on energy dependence, but that it clashes with neutrino production from pion and with neutrino oscillations. A Coleman-Glashow superluminal neutrino beam would also have problems with pion decay kinematics for the OPERA setup; it could be easily reconciled with SN1987a data, but then it would be very problematic to account for neutrino oscillations.Comment: v1: 10 pages, 2 figures; v2: 12 pages, 2 figures, improved discussion of CG case as for pion decay and neutrino oscillations, added reference