Three errors in the article: "The OPERA neutrino velocity result and the synchronisation of clocks"

Besida, Olivier

doi:10.48550/arxiv.1110.2909

Cited by 4 publications

(5 citation statements)

References 2 publications

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“…A large number of theoretical models emerged trying to explain the observed anomaly, for example by Fermi point splitting [2], spontaneous symmetry breaking caused by the existence of a fermionic condensate [3], or a multiple Lorentz group structure [4]. However, the physics community remained sceptical and articles were published trying to explain the result by an error source that had not been taken into account [5][6][7]. Unfortunately, at the 25th International Conference on Neutrino Physics and Astrophysics OPERA announced that their new measurement yields a deviation of the neutrino velocity from the speed of light, which is consistent with zero.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the consistency of parity-odd nonbirefringent modified Maxwell theory

Schreck

2012

Phys. Rev. D

100

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There exist two deformations of standard electrodynamics that describe Lorentz symmetry violation in the photon sector: CPT -odd Maxwell-Chern-Simons theory and CPT -even modified Maxwell theory. In this article, we focus on the parity-odd nonbirefringent sector of modified Maxwell theory. It is coupled to a standard Dirac theory of massive spin-1/2 fermions resulting in a modified quantum electrodynamics (QED). This theory is discussed with respect to properties such as microcausality and unitarity, where it turns out that these hold.Furthermore, a priori, the limit of the theory for vanishing Lorentz-violating parameters seems to be discontinuous. The modified photon polarization vectors are interweaved with preferred spacetime directions defined by the theory and one vector even has a longitudinal part. That structure remains in the limit mentioned. Since it is not clear, whether or not this behavior is a gauge artifact, the cross section for a physical process -modified Compton scattering -is calculated numerically. Despite the numerical instabilities occurring for scattering of unpolarized electrons off polarized photons in the second physical polarization state, it is shown that for Lorentz-violating parameters much smaller than one, the modified cross sections approach the standard QED results. Analytical investigations strengthen the numerical computations.Hence, the theory proves to be consistent, at least with regard to the investigations performed. This leads to the interesting outcome of the modification being a welldefined parity-odd extension of QED.

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Section: Introductionmentioning

confidence: 99%

Analysis of the consistency of parity-odd nonbirefringent modified Maxwell theory

Schreck

2012

Phys. Rev. D

100

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“…Each new coupling of particles to massless gauge bosons 3 opens a new sector with a maximum attainable velocity for these particles from left to right.…”

Section: A Invariant and Maximum Velocitymentioning

confidence: 99%

“…The authors of [2][3][4][5][6][7] tried to figure out how the OPERA result could be explained by possible systematical errors. Beyond that, in [8] a cross-check for the result was proposed.…”

Section: Introductionmentioning

confidence: 99%

Multiple Lorentz Groups—A Toy Model for Superluminal Muon Neutrinos

Schreck¹

2012

JMP

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In this article an idea is presented, which allows for the explanation of superluminal muon neutrinos. It is based on the introduction of a new superluminal, massless gauge boson coupling to the neutrino only, but not to other standard model particles. The model is discussed with regard to the Supernova 1987 (SN 1987) velocity bound on electron antineutrinos and the Cohen-Glashow constraint on superluminal neutrino propagation. The latter can be circumvented ifwithin the framework of the model-a sterile neutrino mixing with the active neutrino mass eigenstates is introduced. The suggestion of a sterile neutrino accounting for superluminal neutrinos has already been proposed in several papers. It is possible to choose mixing angles with the sterile neutrino sector such that the model respects both the SN 1987 bound and the muon neutrino travels superluminally.

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“…The scientific community has produced a plethora of works to interpret the puzzling neutrino speed result. These works were based on some systematic errors caused by the Earth's motion (Monderen 2011) or errors in synchronization of clocks by either a third clock moving into the gravitational field of Earth (Contaldi 2011) or GPS satellites (van Elburg 2011), which were 1 http://proj-cngs.web.cern.ch/proj-cngs/ later reviewed (Besida 2011, Armando V.D.B. Assis 2011 2 ).…”

Section: Introductionmentioning

confidence: 99%

Are OPERA neutrinos faster than light because of non-inertial reference frames?

Germanà

2012

A&A

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Context. Recent results from the OPERA experiment reported a neutrino beam traveling faster than light. The challenging experiment measured the neutrino time of flight (TOF) over a baseline from the CERN to the Gran Sasso site, concluding that the neutrino beam arrives ∼60 ns earlier than a light ray would do. Because the result, if confirmed, has an enormous impact on science, it might be worth double-checking the time definitions with respect to the non-inertial system in which the neutrino travel time was measured. An observer with a clock measuring the proper time τ free of non-inertial effects is the one located at the solar system barycenter (SSB).Aims. Potential problems in the OPERA data analysis connected with the definition of the reference frame and time synchronization are emphasized. We aim to investigate the synchronization of non-inertial clocks on Earth by relating this time to the proper time of an inertial observer at SSB. Methods. The Tempo2 software was used to time-stamp events observed on the geoid with respect to the SSB inertial observer time. Results. Neutrino results from OPERA might carry the fingerprint of non-inertial effects because they are timed by terrestrial clocks. The CERN-Gran Sasso clock synchronization is accomplished by applying corrections that depend on special and general relativistic time dilation effects at the clocks, depending on the position of the clocks in the solar system gravitational well. As a consequence, TOF distributions are centered on values shorter by tens of nanoseconds than expected, integrating over a period from April to December, longer if otherwise. It is worth remarking that the OPERA runs have always been carried out from April/May to November. Conclusions. If the analysis by Tempo2 holds for the OPERA experiment, the excellent measurement by the OPERA collaboration will turn into a proof of the general relativity theory in a weak field approximation. The analysis presented here is falsifiable because it predicts that performing the experiment from January to March/April, the neutrino beam will be detected to arrive ∼50 ns later than light.

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Three errors in the article: "The OPERA neutrino velocity result and the synchronisation of clocks"

Cited by 4 publications

References 2 publications

Analysis of the consistency of parity-odd nonbirefringent modified Maxwell theory

Analysis of the consistency of parity-odd nonbirefringent modified Maxwell theory

Multiple Lorentz Groups—A Toy Model for Superluminal Muon Neutrinos

Are OPERA neutrinos faster than light because of non-inertial reference frames?

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