Predictions of Ultra-High Energy Cosmic Ray Propagation in the Context of Homogeneously Modified Special Relativity

Torri, Marco Danilo Claudio; Caccianiga, Lorenzo; Matteo, Armando di; Maino, Andrea; Miramonti, L.

doi:10.3390/sym12121961

Cited by 11 publications

(13 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ultra-high-energy cosmic rays (UHECRs) and the Greisen-Zatsepin-Kuz'min (GZK) cut-off [443,457,458]: UHECRs can interact with the CMB, dissipate energy during their propagation and are attenuated in a way that depends on their energy and nature (see Sec. 3.3.2.2); therefore, the universe is opaque to their propagation (the GZK cut-off).…”

Section: Relative Locality and Born Geometrymentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

View full text Add to dashboard Cite

The exploration of the universe has recently entered a new era thanks to the multi-messenger paradigm, characterized by a continuous increase in the quantity and quality of experimental data that is obtained by the detection of the various cosmic messengers (photons, neutrinos, cosmic rays and gravitational waves) from numerous origins. They give us information about their sources in the universe and the properties of the intergalactic medium. Moreover, multi-messenger astronomy opens up the possibility to search for phenomenological signatures of quantum gravity. On the one hand, the most energetic events allow us to test our physical theories at energy regimes which are not directly accessible in accelerators; on the other hand, tiny effects in the propagation of very high energy particles could be amplified by cosmological distances. After decades of merely theoretical investigations, the possibility of obtaining phenomenological indications of Planck-scale effects is a revolutionary step in the quest for a quantum theory of gravity, but it requires cooperation between different communities of physicists (both theoretical and experimental). This review, prepared within the COST Action CA18108 "Quantum gravity phenomenology in the multi-messenger approach", is aimed at promoting this cooperation by giving a state-of-the art account of the interdisciplinary expertise that is needed in the effective search of quantum gravity footprints in the production, propagation and detection of cosmic messengers.

show abstract

Section: Relative Locality and Born Geometrymentioning

confidence: 99%

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Addazi,

Alvarez-Muniz,

Batista

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…They align well with the source. See for instance [180] for further explanation and connection to LV.…”

Section: Astrophysical Neutrinosmentioning

confidence: 99%

Astrophysical Neutrinos in Testing Lorentz Symmetry

Roberts

2021

Galaxies

View full text Add to dashboard Cite

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.

show abstract

“…The physics correlated with the UHECR propagation can indeed be exploited to investigate new phenomena, such as the supposed quantum structure of the spacetime [3,5,4,6,7,8]. UHECRs propagate for cosmic distances and reach extremely high energies, therefore they can open a window on the Planck scale physics.…”

Section: Introductionmentioning

confidence: 99%

“…The introduction of QG kinematical perturbations can modify the allowed phase space for the interaction with the CMB and the pion creation process. The phenomenological effects are evaluated via numerical simulations conducted using an ad hoc version of the software SimProp [17], modified in order to include the QG kinematical perturbations [7]. The introduction of Lorentz covariance modifications induce an opacity horizon enlargement [6,7], as foreseen even in the case of pure LIV [3,5,4].…”

Section: Introductionmentioning

confidence: 99%

“…The kinematical perturbations modify the allowed phase space for the reaction and may therefore influence the processes involved in UHECR propagation. The introduction of QG phenomenology can indeed affect the photopion production mechanism, the core reaction underlying the GZK phenomenon [4,5,6,7]. The QG-caused reduction of the allowed phase space can modify the inelasticity K eq.…”

Section: Qg Introduced Phenomenology In Uhecr Propagationmentioning

confidence: 99%

See 1 more Smart Citation

Quantum gravity phenomenology induced in the propagation of UHECR, a kinematical solution in Finsler and generalized Finsler spacetime

Torri¹

2021

Preprint

Self Cite

View full text Add to dashboard Cite

It is well-known that the Universe is opaque to the propagation of Ultra-High-Energy Cosmic Rays (UHECRs) since these particles dissipate energy during their propagation interacting with the Cosmic Microwave Background (CMB) mainly in the so-called GZK cut-off phenomenon. Some experimental evidence seems to hint at the possibility of a dilation of the GZK predicted opacity sphere. It is well-known that kinematical perturbations caused by supposed quantum gravity (QG) effects can modify the foreseen GZK opacity horizon.The introduction of Lorentz Invariance Violation (LIV) can indeed reduce, in some cases making negligible, the CMB-UHECRs interaction probability. In this work we explore the effects induced by modified kinematics in the UHE-CRs phenomenology from the QG perspective. We explore the possibility of a geometrical description of the massive fermions interaction with the supposed quantum structure of spacetime in order to introduce a Lorentz covariance modification. The kinematics is amended modifying the Dispersion Relations (DRs) of free particles in the context of a covariance-preserving framework. This spacetime description requires a more general geometry than the usual Riemannian one, indicating for instance the Finsler construction and the related generalized Finsler spacetime as ideal candidates. Finally we investigate the correlation

show abstract

Predictions of Ultra-High Energy Cosmic Ray Propagation in the Context of Homogeneously Modified Special Relativity

Cited by 11 publications

References 53 publications

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review

Astrophysical Neutrinos in Testing Lorentz Symmetry

Quantum gravity phenomenology induced in the propagation of UHECR, a kinematical solution in Finsler and generalized Finsler spacetime

Contact Info

Product

Resources

About