Test of Lorentz Violation with Astrophysical Neutrino Flavor at IceCube

Katori, T.; Argüelles, C.; Farrag, Kareem Ramadan; Mandalia, Shivesh

doi:10.1142/9789811213984_0042

Cited by 7 publications

(12 citation statements)

References 7 publications

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“…At IceCube, the astrophysical flavor studies use a triangle chart to analyze flavor content with or without LV. The triangle representation, shown in References [182,183], is a convenient tool to represent flavor ratios for the three neutrino flavors.…”

Section: Flavor Studies Of Astrophysical Neutrinosmentioning

confidence: 99%

“…A conventional oscillation would be expected to specify a small region in a flavor triangle representation signifying a close to equal ratio of each flavor (φ e :φ µ :φ τ ) = (1:1:1) [183][184][185][186][187][188][189][190]. This is expected over these distances regardless of the understanding of the source of neutrinos.…”

Section: Flavor Studies Of Astrophysical Neutrinosmentioning

confidence: 99%

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Astrophysical Neutrinos in Testing Lorentz Symmetry

Roberts

2021

Galaxies

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An overview of searches related to neutrinos of astronomical and astrophysical origin performed within the framework of the Standard-Model Extension is provided. For this effective field theory, key definitions, intriguing physical consequences, and the mathematical formalism are summarized within the neutrino sector to search for effects from a background that could lead to small deviations from Lorentz symmetry. After an introduction to the fundamental theory, examples of various experiments within the astronomical and astrophysical context are provided. Order-of-magnitude bounds of SME coefficients are shown illustratively for the tight constraints that this sector allows us to place on such violations.

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Section: Flavor Studies Of Astrophysical Neutrinosmentioning

confidence: 99%

Section: Flavor Studies Of Astrophysical Neutrinosmentioning

confidence: 99%

Astrophysical Neutrinos in Testing Lorentz Symmetry

Roberts

2021

Galaxies

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“…where E Pl 10 19 GeV is the Planck energy, which is the characteristic suppression scale for the LIV phenomenon, and k n are positive adimensional coefficients. From the previous relation (92), one can compute the photon propagation velocity as a function of its energy, considering that this particle propagates along the null direction:…”

Section: Time Delaysmentioning

confidence: 99%

“…The possibility of using neutrinos from astrophysical sources to test the hypothesis of theories predicting LIV and eventually also CPT-violation has been widely exploited, not only in the studies that we just discussed (most of which rely on the investigation of 2014 Ice Cube data [82]) and that will also continue in future (concerning these kind of analyses that rely mainly on future Ice Cube data, see also e.g., [92]), but also with the use of other sets of data and considering different astrophysical sources. For instance, the case of the study of the propagation of neutrinos from a Core-Collapse Supernova (looking for variations in time of the order of a few milliseconds [93]).…”

Section: Cpt and LIV In Neutrino Physicsmentioning

confidence: 99%

Phenomenological Effects of CPT and Lorentz Invariance Violation in Particle and Astroparticle Physics

2020

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It is well known that a fundamental theorem of Quantum Field Theory (QFT) set in flat spacetime ensures the CPT invariance of the theory. This symmetry is strictly connected to the Lorentz covariance, and consequently to the fundamental structure of spacetime. Therefore it may be interesting to investigate the possibility of departure from this fundamental symmetry, since it can furnish a window to observe possible effects of a more fundamental quantum gravity theory in a “lower energy limit”. Moreover, in the past, the inquiry of symmetry violations provided a starting point for new physics discoveries. A useful physical framework for this kind of search is provided by astroparticle physics, thanks to the high energy involved and to the long path travelled by particles accelerated by an astrophysical object and then revealed on Earth. Astrophysical messengers are therefore very important probes for investigating this sector, involving high energy photons, charged particles, and neutrinos of cosmic origin. In addition, one can also study artificial neutrino beams, investigated at accelerator experiments. Here we discuss the state of art for all these topics and some interesting new proposals, both from a theoretical and phenomenological point of view.

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“…Here we present some examples from this analysis [28]. The following plots show how the Bayes factor changes with respect to the scale of new physics.…”

Section: Search Of New Physics Through Astrophysical Neutrino Flavormentioning

confidence: 99%

Quest for new physics using astrophysical neutrino flavour in IceCube

Farrag¹,

Argüelles²,

Katori³

et al. 2019

Proceedings of 36th International Cosmic Ray Conference — PoS(ICRC2019)

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We have detected astrophysical neutrinos in IceCube that can be used to probe astrophysical sources at ultra high scales. Here we report a search for anomalous space time effects using astrophysical neutrino flavor data in IceCube. New effective operators are introduced to drive non-standard neutrino flavor mixing which modify the flavor ratios compared to standard cases. Using the High Energy Starting Events sample (HESE) 7.5-year data for this analysis, we found no evidence of such flavor anomalies. However, we are expecting to set limits from this new approach which goes far beyond any known techniques. Importantly, we achieve the necessary precision to probe new physics using neutrino flavor expected by Planck scale theories.

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Test of Lorentz Violation with Astrophysical Neutrino Flavor at IceCube

Cited by 7 publications

References 7 publications

Astrophysical Neutrinos in Testing Lorentz Symmetry

Astrophysical Neutrinos in Testing Lorentz Symmetry

Phenomenological Effects of CPT and Lorentz Invariance Violation in Particle and Astroparticle Physics

Quest for new physics using astrophysical neutrino flavour in IceCube

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