Tests of Lorentz Invariance

Wei, Junjie; Wu, Xue-Feng

doi:10.1007/978-981-16-4544-0_132-1

Cited by 8 publications

(6 citation statements)

References 100 publications

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“…( 5) and eq. ( 6) are somewhat weaker compared to some existing constraints in the literature [3,4] (see also a conservative bound E LV,1 ≥ 3.6 × 10 17 GeV in refs. [12][13][14][15][16][17][18][19][20][21]).…”

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confidence: 56%

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Constraint on Lorentz invariance violation from Vela pulsar

Li,

Zhu,

2024

EPL

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The High Energy Stereoscopic System (H.E.S.S.) Collaboration reported the discovery of a novel radiation component from the Vela pulsar by their Cherenkov telescopes. It is of great importance that gamma rays with energies of at least 20 TeV are recorded unexpectedly. The H.E.S.S. Collaboration argued that such results may challenge the state-of-the-art models for the high-energy emission of pulsars. We point out in this work that these results also provide a unique opportunity to constrain certain Lorentz invariance violation parameters, leading to the realization of studying Lorentz invariance violation by using gamma-ray pulsars. The Lorentz invariance violation scale is constrained at the level of E_LV,1 > 1.66 × 10^17GeV for the linear scenario, and E_LV,2 > 3.53 × 10^10GeV for the quadratic scenario. We anticipate that digging into the detailed features of the data of the Vela pulsar and analyzing potentially more very-high-energy photon data from pulsars in the future would improve the constraints on Lorentz invariance violation.

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confidence: 56%

“…Therefore, gamma-ray bursts (GRBs) have long been the central focus for the study of LIV following this method (see refs. [3,4] and references therein). There are also proposals that very-high-energy (VHE) photons from pulsars can be used to study LIV [5][6][7].…”

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confidence: 99%

Constraint on Lorentz invariance violation from Vela pulsar

Li,

Zhu,

2024

EPL

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“…For instance, in [10], ξ E pl ≡ Λ/2 1/n , introducing a factor of (1/2) in the expression of the time delay. 5 Let us note that we are using the fiducial value of the Hubble constant H 0 = 70 km s −1 Mpc −1 , given the still on going discrepancy between the value derived from direct measurements using Cepheid variables, leading to H 0 = 73.04 ± 1.04 km s −1 Mpc −1 [20], and the value derived from the ΛCDM model and the Cosmic Microwave Background observations, H 0 = 67.4 ± 0.5 km s −1 Mpc −1 [21]. The other numerical values of the constants that appear in this work are taken from [22].…”

Section: Time Of Flight Formula In LIVmentioning

confidence: 99%

“…The best candidates to look for these departures from SR are the astrophysical messengers [2][3][4][5], where we encounter energies orders of magnitude greater than those achievable with Earth-based accelerators. However, the use of observations of these messengers to reveal new physics is limited by uncertainties in their production mechanisms and in the description of the backgrounds through which they propagate.…”

Section: Introductionmentioning

confidence: 99%

Consistency of Lorentz-invariance violation neutrino scenarios in time delay analyses

Carmona,

Cortés,

Reyes

2024

Class. Quantum Grav.

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Modifications inspired by quantum gravity in the kinematics of special relativity can manifest in various ways, including anomalies in the time of flight of massless particles and the emergence of decay channels for otherwise stable particles. Typically, these effects are studied independently; however, it may be necessary to combine both to perform a consistent analysis. In this work, we study the interplay between time-of-flight anomalies and neutrino instability in the context of a flavor-independent high-energy Lorentz-invariance violation (LIV) in the neutrino sector. Ensuring compatibility between both types of effects imposes strong constraints on the existence of early neutrinos with energies exceeding a maximum value determined by the scale of new physics. Such constraints depend on the specific LIV scenario and should be integrated into searches for high-energy neutrinos from gamma-ray bursts exhibiting LIV time shifts.

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“…This has led to different theories in quantum gravity (QG) as well as various cosmological models beyond ΛCDM [7][8][9][10][11][12][13][14][15][16][17][18]. At energies close to the Planck energy scale, E P ∼ 1.2 × 10 19 GeV, some of the fundamental concepts in physics such as Lorentz symmetry can be broken as predicted by various QG theories [5,[19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Such very large energies are unreachable by currently available facilities and instrumentation.…”

Section: Introductionmentioning

confidence: 99%

Investigating the Lorentz invariance violation effect using different cosmological backgrounds

Abdalla,

Cotter,

Backes

et al. 2023

Class. Quantum Grav.

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Familiar concepts in physics, such as Lorentz symmetry, are expected to be broken at energies approaching the Planck energy scale as predicted by several quantum-gravity theories. However, such very large energies are unreachable by current experiments on Earth. Current and future Cherenkov telescope facilities may have the capability to measure the accumulated deformation from Lorentz symmetry for photons traveling over large distances via energy-dependent time delays. One of the best natural laboratories to test Lorentz invariance violation (LIV) signatures are gamma-ray bursts. The calculation of time delays due to the LIV effect depends on the cosmic expansion history. In most of the previous works calculating time lags due to the LIV effect, the standard ΛCDM (or concordance) cosmological model is assumed. In this paper, we investigate whether the LIV signature is significantly different when assuming alternatives to the ΛCDM cosmological model. Specifically, we consider cosmological models with a non-trivial dark-energy equation of state (EoS) (w≠−1), such as the standard Chevallier–Polarski–Linder parameterization, the quadratic parameterization of the dark-energy EoS, and the Pade parameterizations. We find that the relative difference in the predicted time lags is small, of the order of at most a few percent, and thus likely smaller than the systematic errors of possible measurements currently or in the near future.

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Tests of Lorentz Invariance

Cited by 8 publications

References 100 publications

Constraint on Lorentz invariance violation from Vela pulsar

Constraint on Lorentz invariance violation from Vela pulsar

Consistency of Lorentz-invariance violation neutrino scenarios in time delay analyses

Investigating the Lorentz invariance violation effect using different cosmological backgrounds

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