Lorentz and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi><mml:mi>T</mml:mi></mml:math>invariance violation in high-energy neutrinos

Hooper, Dan; Morgan, Dean; Winstanley, Elizabeth

doi:10.1103/physrevd.72.065009

Cited by 110 publications

(131 citation statements)

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“…Although such an attenuation may be too small to be detected in laboratory experiments, it may nevertheless be appreciable in the case of ultra-high-energy neutrinos, which have travelled cosmological distances before reaching the observation point on Earth [7,21]. From such (non) observations of damping effects, one may place important bounds on quantumgravity effects, information that may prove quite useful in our theoretical quest of understanding space-time.…”

Section: Introductionmentioning

confidence: 99%

“…One of the most sensitive probes of such stochastic quantum-gravity phenomena are neutrinos [7,16,17,18,19,20], in particular high-energy ones [21]. It is the point of this article to present various approaches to gravitationally-induced decoherence of matter and to classify some characteristic experimental predictions that could be falsified in current or near future neutrino experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, for this particular model of QG decoherence, appreciable effects might only be expected in situations involving very high energy cosmological neutrinos. In view of this, the analysis of high-energy neutrinos performed in [21], which was based only on conventional Lindblad decoherence, needs to be repeated in order to incorporate the above effects.…”

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confidence: 99%

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Methods of approaching decoherence in the flavor sector due to space-time foam

Mavromatos

Sarkar

2006

Phys. Rev. D

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In the first part of this work we discuss possible effects of stochastic space-time foam configurations of quantum gravity on the propagation of "flavoured" (Klein-Gordon and Dirac ) neutral particles, such as neutral mesons and neutrinos. The formalism is not the usually assumed Lindblad one, but it is based on random averages of quantum fluctuations of space time metrics over which the propagation of the matter particles is considered. We arrive at expressions for the respective oscillation probabilities between flavours which are quite distinct from the ones pertaining to Lindblad-type decoherence, including in addition to the (expected) Gaussian decay with time, a modification to oscillation behaviour, as well as a power-law cutoff of the time-profile of the respective probability. In the second part we consider space-time foam configurations of quantumfluctuating charged black holes as a way of generating (parts of) neutrino mass differences, mimicking appropriately the celebrated MSW effects of neutrinos in stochastically fluctuating random media. We pay particular attention to disentangling genuine quantum-gravity effects from ordinary effects due to the propagation of a neutrino through ordinary matter. Our results are of interest to precision tests of quantum gravity models using neutrinos as probes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Methods of approaching decoherence in the flavor sector due to space-time foam

Mavromatos

Sarkar

2006

Phys. Rev. D

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“…Besides standard astrophysical mechanisms, exotic scenarios like the annihilation of dark matter (DM) particles in the Milky Way halo could also be probed. Positrons constitute a good channel to search for DM, given their low abundance in cosmic radiation [16][17][18][19]. On top of the antiparticles from standard astrophysical processes, the messengers of DM annihilation would generate distortions in the measured fluxes.…”

Section: The Positron Fraction Measurementmentioning

confidence: 99%

Recent results from the AMS-02 experiment

Vecchi

2015

EPJ Web of Conferences

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Abstract. The AMS-02 detector is a large acceptance magnetic spectrometer operating onboard the International Space Station since May 2011. The main goals of the detector are the search for antimatter and dark matter in space, as well as the measurement of cosmic ray composition and flux. Precise measurements of cosmic ray positrons and electrons are presented in this document, based on 41×10 9 events collected during the first 30 months of operations.

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“…The flavor composition at the Earth thus carries important information on the lepton flavor structure [8], see [9] for a recent review. Furthermore, the long baselines and high energies allow for interesting discussions of exotic possibilities such as neutrino decay [10], pseudo-Dirac neutrinos [11], Lorentz and CPT violation [12], which may show an effect in flavor ratio deformations of the diffuse spectrum [13].…”

Section: Introductionmentioning

confidence: 99%

The Glashow resonance at IceCube: signatures, event rates andppvs.pγ interactions

Bhattacharya¹,

Gandhi²,

Rodejohann³

et al. 2011

J. Cosmol. Astropart. Phys.

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We revisit the signatures of the Glashow resonance processν e e → W in the highenergy astrophysical neutrino observatory IceCube. We note that in addition to the standard hadronic and electromagnetic showers produced by an incoming neutrino at the resonance energy of E ν ≈ 6.3 PeV, there are two clear signals of the process: the "pure muon" fromν e e →ν µ µ and the "contained lollipop" fromν e e →ν τ τ . The event rate and the signal-to-background ratio (the ratio of the resonant to concurrent non-resonant processes) are calculated for each type of interaction, based on current flux limits on the diffuse neutrino flux. Because of the low background in the neighborhood of the resonance, the observation of only one pure muon or contained lollipop event essentially signals discovery of the resonance, even if the expected event numbers are small. We also evaluate the total event rates of the Glashow resonance from the extra-galactic diffuse neutrino flux and emphasize its utility as a discovery tool to enable first observations of such a flux. We find that one can expect 3.6 (0.65) events per year for a pure pp (pγ) source, along with an added contribution of 0.51 (0.21) from non-resonant events. We also give results as a function of the ratio of pp vs pγ sources.

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Lorentz andCPTinvariance violation in high-energy neutrinos

Cited by 110 publications

References 115 publications

Methods of approaching decoherence in the flavor sector due to space-time foam

Methods of approaching decoherence in the flavor sector due to space-time foam

Recent results from the AMS-02 experiment

The Glashow resonance at IceCube: signatures, event rates andppvs.pγ interactions

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