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Limits on Neutrino Lorentz Violation from Multimessenger Observations of TXS 0506+056
/ Ellis, John (King's Coll. London ; CERN ; NICPB, Tallinn) ; Mavromatos, Nikolaos E. (King's Coll. London) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington)
The observation by the IceCube Collaboration of a high-energy ($E \gtrsim 200$ TeV) neutrino from the direction of the blazar TXS 0506+056 and the coincident observations of enhanced $\gamma$-ray emissions from the same object by MAGIC and other experiments can be used to set stringent constraints on Lorentz violation in the propagation of neutrinos that is linear in the neutrino energy: $\Delta v = - E/M_1$, where $\Delta v$ is the deviation from the velocity of light, and $M_1$ is an unknown high energy scale to be constrained by experiment. Allowing for a difference in neutrino and photon propagation times of $\sim 10$ days, we find that $M_1 \gtrsim 3 \times 10^{16}$ GeV. [...]
arXiv:1807.05155; KCL-PH-TH/2018-37; CERN-TH/2018-166; KCL-PH-TH-2018-37; CERN-TH-2018-166.-
2019-02-10 - 4 p.
- Published in : Phys. Lett. B 789 (2019) 352-355
Article from SCOAP3: PDF; Fulltext: PDF; Preprint: PDF;
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Robust Constraint on Lorentz Violation Using Fermi-LAT Gamma-Ray Burst Data
/ Ellis, John (King's Coll. London ; CERN) ; Konoplich, Rostislav (New York U. (main) ; Manhattan Coll., Riverdale) ; Mavromatos, Nikolaos E. (King's Coll. London ; U. Valencia (main)) ; Nguyen, Linh (Manhattan Coll., Riverdale) ; Sakharov, Alexander S. (New York U. (main) ; Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington (main))
Models of quantum gravity suggest that the vacuum should be regarded as a medium with quantum structure that may have non-trivial effects on photon propagation, including the violation of Lorentz invariance. Fermi Large Area Telescope (LAT) observations of gamma-ray bursts (GRBs) are sensitive probes of Lorentz invariance, via studies of energy-dependent timing shifts in their rapidly-varying photon emissions. [...]
arXiv:1807.00189; KCL-PH-TH/2018-28; CERN-TH/2018-138; IFIC/17-62; CERN-TH-2018-138.-
2019-04-16 - 22 p.
- Published in : Phys. Rev. D 99 (2019) 083009
Fulltext: PDF; Fulltext from Publisher: PDF;
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Higgs Induced Triboluminescence in Binary Black Hole Mergers
/ Chitishvili, Mariam (Javakhishvili State U.) ; Gogberashvili, Merab (Javakhishvili State U. ; Tbilisi, Inst. Phys.) ; Konoplich, Rostislav (Manhattan Coll., Riverdale) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN)
We conjecture that the Higgs potential can be significantly modified when it is in close proximity to the horizon of an astrophysical black hole, leading to the destabilization of the electroweak vacuum. In this situation, the black hole should be encompassed by a shell consisting of a "bowling substance" of the nucleating new phase bubbles. [...]
arXiv:2111.07178.-
2023-06-22 - 43 p.
- Published in : : 9 (2023) , pp. 301
- Published in : Universe: 9 (2023) , pp. 301
Fulltext: 2111.07178 - PDF; document - PDF;
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Possible Manifestation of a Non-Pointness of the Electron in $e^+e^-$ Annihilation Reaction at Centre of Mass Energies 55-207 GeV
/ Chen, Yutao (Hefei, CUST) ; Lin, Chih-Hsun (Taiwan, Inst. Phys.) ; Liu, Minghui (Hefei, CUST) ; Sakharov, Alexander S. (Manhattan Coll., Riverdale ; CERN) ; Ulbricht, Jürgen (Zurich, ETH) ; Zhao, Jiawei (Hefei, CUST)
The experimental data from VENUS, TOPAS, OPAL, DELPHI, ALEPH and L3 collaborations, collected from 1989 to 2003, are applied to study the QED framework through direct contact interaction terms approach, using the annihilation reaction $\rm e^+ e^-\rightarrow \gamma\gamma(\gamma)$. The analysis involves performing of a $\chi^{2}$ test to detect the presence of an excited electron $e^{*}$ and evidence of non-point like behavior in the $e^+e^-$ annihilation zone. [...]
arXiv:2210.11149.-
2023-07-10 - 32 p.
- Published in : Physics 5 (2023) 752-783
Fulltext: 2210.11149 - PDF; Publication - PDF;
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FRB 121102 Casts New Light on the Photon Mass
/ Bonetti, Luca (Orleans U. ; LPC2E, Orleans) ; Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nikolaos E. (King's Coll. London ; CERN) ; Sakharov, Alexander S. (New York U. ; Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K. (CERN ; Texas U., Arlington) ; Spallicci, Alessandro D. A. M. (Orleans U. ; LPC2E, Orleans)
The photon mass, $m_\gamma$, can in principle be constrained using measurements of the dispersion measures (DMs) of fast radio bursts (FRBs), once the FRB redshifts are known. The DM of the repeating FRB 121102 is known to $< 1$\%, a host galaxy has now been identified with high confidence,and its redshift, $z$, has now been determined with high accuracy: $z = 0.19273(8)$. [...]
arXiv:1701.03097; KCL-PH-TH-2017-01; CERN-TH-2017-007.-
2017-05-10 - 4 p.
- Published in : Phys. Lett. B 768 (2017) 326-329
Article from SCOAP3: PDF; Fulltext: PDF;
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Photon Mass Limits from Fast Radio Bursts
/ Bonetti, Luca (Orleans U. ; LPCE, Orleans) ; Ellis, John (King's Coll. London ; CERN) ; Mavromatos, Nikolaos E. (King's Coll. London ; CERN) ; Sakharov, Alexander S. (New York U. ; Manhattan Coll., Riverdale ; CERN) ; Sarkisyan-Grinbaum, Edward K.G. (CERN ; Texas U., Arlington) ; Spallicci, Alessandro D.A.M. (Orleans U. ; LPCE, Orleans)
The frequency-dependent time delays in fast radio bursts (FRBs) can be used to constrain the photon mass, if the FRB redshifts are known, but the similarity between the frequency dependences of dispersion due to plasma effects and a photon mass complicates the derivation of a limit on $m_\gamma$. The redshift of FRB 150418 has been measured to $\sim 2$% and its dispersion measure (DM) is known to $\sim 0.1$%, but the strength of the constraint on $m_\gamma$ is limited by uncertainties in the modelling of the host galaxy and the Milky Way, as well as possible inhomogeneities in the intergalactic medium (IGM). [...]
arXiv:1602.09135; KCL-PH-TH-2016-08; LCTS-2016-06; CERN-TH-2016-044; KCL-PH-TH-2016-08; LCTS-2016-06; CERN-TH-2016-044.-
Geneva : CERN, 2016-06-10 - 5 p.
- Published in : Phys. Lett. B 757 (2016) 548-552
Article from SCOAP3: PDF; Elsevier Open Access article: PDF; Fulltext: PDF; External link: Preprint
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