Tests of Lorentz Invariance

Wei, Junjie; Wu, Xue-Feng

doi:10.48550/arxiv.2111.02029

Cited by 4 publications

(9 citation statements)

References 84 publications

(190 reference statements)

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“…Evidence for LIV based on TeV-PeV observations of GRB 221009A has also been claimed (although with caveats) [190]. However, the inferred values of E QG are in conflict some of the most stringent limits obtained [147,148,68] (See Table 3 of [21]). Furthermore, when one combines the data from these disparate datasets, which individually point to LIV, one does not get a consistent picture or a good fit to the combined data [172].…”

Section: Discussionmentioning

confidence: 94%

“…We should also mention that many other reviews focusing on observational tests of LIV have also been written over the years. A non-exhaustive list includes [12,13,14,15,16,17,18,19,20,21,22,23,24,25] (see also references therein). However, since this is a rapidly evolving field, this review will attempt to cover a few topics not mentioned in some of the aforementioned reviews.…”

Section: H(z)mentioning

confidence: 99%

“…1.8, we shall discuss LIV searches with GRBs using polarization measurements. We note that a tabular summary of results for LIV using GRB spectral lags (upto 2021) has also been collated in Table 1 of [21].…”

Section: Gamma-ray Burstsmentioning

confidence: 99%

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Astrophysical and Cosmological Searches for Lorentz Invariance Violation

Desai¹

2023

Preprint

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Lorentz invariance is one of the fundamental tenets of Special Relativity, and has been extensively tested with laboratory and astrophysical observations. However, many quantum gravity models and theories beyond the Standard Model of Particle Physics predict a violation of Lorentz invariance at energies close to Planck scale. This article reviews observational and experimental tests of Lorentz invariance violation (LIV) with photons, neutrinos and gravitational waves. Most astrophysical tests of LIV using photons are based on searching for a correlation of the spectral lag data with redshift and energy. These have been primarily carried out using compact objects such as pulsars, Active Galactic Nuclei (AGN), and Gamma-ray bursts (GRB). There have also been some claims for LIV from some of these spectral lag observations with GRBs, which however are in conflict with the most stringent limits obtained from other LIV searches. Searches have also been carried out using polarization measurements from GRBs and AGNs. For neutrinos, tests have been made using both astrophysical observations at MeV energies (from SN 1987A) as well as in the TeV-PeV energy range based on IceCube observations, atmospheric neutrinos, and long-baseline neutrino oscillation experiments. Cosmological tests of LIV entail looking for a constancy of the speed of light as a function of redshift using multiple observational probes, as well as looking for birefringence in Cosmic Microwave background observations. This article will review all of these aforementioned observational tests of LIV, including results which are in conflict with each other.

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Section: Discussionmentioning

confidence: 94%

Section: H(z)mentioning

confidence: 99%

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Astrophysical and Cosmological Searches for Lorentz Invariance Violation

Desai¹

2023

Preprint

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“…Additionally, the constraints on the mass scale of Lorentz symmetry violation has been discussed based on the LHAASO data. In particular, Lorentz violation due to the subluminal scenario seems to be preferred, and the constraints on the mass scale are stronger in comparison with those that appear in literature [25][26][27][28][29]. One of the main reasons for considering Lorentz symmetry violation arises from the fact that the observed energy of gamma ray photons is significantly higher than the threshold value of pair-production interactions.…”

Section: Introductionmentioning

confidence: 98%

Implications of gamma-ray photon measurements at the LHAASO on Lorentz symmetry *

et al. 2022

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The Large High Altitude Air Shower Observatory (LHAASO) has reported the measurement of photons with high energy up to 1.42 PeV from 12 gamma-ray sources. We are concerned with the implications of LHAASO data on the fate of Lorenz symmetry at such high energy level, thus we consider the interaction of the gamma ray with those photons in cosmic microwave background (CMB), and compute the optical depth, the mean free path as well as the survival probability for photons from all these gamma-ray sources. Employing the threshold value predicted by the standard special relativity, it is found that the lowest survival probability for observed gamma ray photons is about 0.60, which is a fairly high value and implies that abundant photons with energy above the threshold value may reach the Earth without Lorentz symmetry violation. We conclude that it is still far to argue that the Lorentz symmetry would be violated due to the present observations from LHAASO. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

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“…Given that LIV is expected to be amplified over cosmological distances, using high-redshift high-energy astronomical objects is key to trying to measure the small Planckian effect (at E << E Pl ). It is worth noting that studies on LIV effects have a long history in the field [3,4,[4][5][6][7][8][9][10][11][12][13][14][15][16], for reviews on the topic, see [2,[17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Impact of cosmology on Lorentz Invariance Violation constraints from GRB time-delays

Staicova

2023

Class. Quantum Grav.

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Putting constraints on a possible Lorentz Invariance Violation (LIV) from astrophysical sources such as gamma-ray bursts (GRBs) is essential for finding evidences of new theories of quantum gravity (QG) that predict an energy-dependent speed of light. This search has its own difficulties, so usually, the effect of the cosmological model is understudied, with the default model being a fixed-parameters $\Lambda$CDM. In this work, we use various astrophysical datasets to study the effect of a number of dark energy models on LIV constraints. To this end, we combine two public time-delay GRB datasets with the supernovae Pantheon dataset, several measurements of angular baryonic acoustic oscillations (BAO), the cosmic microwave background (CMB) distance prior and an optional GRB or quasars dataset. For the LIV parameter $\alpha$, we find the expected from previous works average value of $\alpha \sim 4 \times 10^{-4}$, corresponding to $E_{QG}\ge 10^{17}$ GeV for both time-delay (TD) datasets, with the second one being more sensitive to the cosmological model. The cosmology results in a minimum 20\% deviation in our constraints on the energy. Interestingly, adding the TD points makes the DE models less-preferable statistically and shifts the value of the parameter $c/(H_0 r_d)$ down, making it smaller than the expected value. We observe that possible LIV measurements critically depend on the transparency of the assumptions behind the published data concerning cosmology, and taking this into account may be an important contribution in the case of possible detection.

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Tests of Lorentz Invariance

Cited by 4 publications

References 84 publications

Astrophysical and Cosmological Searches for Lorentz Invariance Violation

Astrophysical and Cosmological Searches for Lorentz Invariance Violation

Implications of gamma-ray photon measurements at the LHAASO on Lorentz symmetry *

Impact of cosmology on Lorentz Invariance Violation constraints from GRB time-delays

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