Results 51 to 60 of about 37,959 (230)

CPT/Lorentz invariance violation and neutrino oscillation

Physics Letters B, 2007
Several portions of the paper was completely re-written and new references added.
Arias, Paola, Gamboa, J., Méndez, F., Das, Ashok, López-Sarrión, J.   +4 more
openaire   +4 more sources

LORENTZ INVARIANCE VIOLATION MATRIX FROM A GENERAL PRINCIPLE [PDF]

Modern Physics Letters A, 2010
We show that a general principle of physical independence or physical invariance of mathematical background manifold leads to a replacement of the common derivative operators by the covariant co-derivative ones. This replacement naturally induces a background matrix, by means of which we obtain an effective Lagrangian for the minimal standard model ...
Zhou, Lingli, Ma, Bo-Qiang
openaire   +2 more sources

Cosmic rays and TeV photons as probes of quantum properties of space-time [PDF]

, 2000
It has been recently observed that small violations of Lorentz invariance, of a type which may arise in quantum gravity, could explain both the observations of cosmic rays above the GZK cutoff and the observations of 20-TeV gamma rays from Markarian 501.
Ahluwalia, Alfaro, Aloisio, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Amelino-Camelia, Bertolami, Biller, Coleman, Ellis, Ellis, Gambini, Gasperini, Gaul, Giovanni Amelino-Camelia, Jackiw, Kifune, Kluzniak, Kostelecky, Lukierski, Lukierski, Majid, Piran, Piran, Protheroe, Sato, Schaefer, Seiberg, Smolin, Thiemann, Tsvi Piran, Yu   +36 more
core   +2 more sources

Constraints on Lorentz invariance violation from the extraordinary Mrk 421 flare of 2014 using a novel analysis method [PDF]

Journal of Cosmology and Astroparticle Physics
The Lorentz Invariance Violation (LIV), a proposed consequence of certain quantum gravity (QG) scenarios, could instigate an energy-dependent group velocity for ultra-relativistic particles.
M. Abe, J. Abhir, A. Abhishek, V. Acciari, A. Aguasca-Cabot, I. Agudo, T. Aniello, S. Ansoldi, L. A. Antonelli, A. Engels, C. Arcaro, M. Artero, K. Asano, A. Babi'c, A. Baquero, U. D. Almeida, J. Barrio, I. Batkovi'c, A. Bautista, J. Baxter, J. B. Gonz'alez, W. Bednarek, E. Bernardini, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, vZ. Bovsnjak, E. Bronzini, I. Burelli, G. Busetto, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. Castro-Tirado, D. Cerasole, G. Ceribella, Y. Chai, A. Cifuentes, E. Colombo, J. Contreras, J. Cortina, S. Covino, G. D'Amico, V. D’Elia, P. D. Vela, F. Dazzi, A. D. Angelis, B. Lotto, R. Menezes, A. Popolo, M. Delfino, J. Delgado, C. Mendez, F. Pierro, R. Tria, L. Venere, A. Donini, D. Dorner, M. Doro, D. Elsaesser, G. Emery, J. Escudero, L. Fariña, A. Fattorini, L. Foffano, L. Font, S. Frose, S. Fukami, Y. Fukazawa, R. L'opez, M. Garczarczyk, S. Gasparyan, M. Gaug, J. Paiva, N. Giglietto, F. Giordano, P. Gliwny, N. Godinovi'c, T. Gradetzke, R. Grau, D. Green, J. Green, P. Gunther, D. Hadasch, A. Hahn, T. Hassan, L. Heckmann, J. Llorente, D. Hrupec, M. Hutten, R. Imazawa, K. Ishio, I. Mart'inez, J. Jormanainen, S. Kankkunen, T. Kayanoki, D. Kerszberg, G. Kluge, Y. Kobayashi, P. M. Kouch, H. Kubo, J. Kushida, M. L'ainez, A. Lamastra, F. Leone, E. Lindfors, L. Linhoff, S. Lombardi, F. Longo, R. L'opez-Coto, M. L'opez-Moya, A. L'opez-Oramas, S. Loporchio, A. Lorini, E. Lyard, B. Fraga, P. Majumdar, M. Makariev, G. Maneva, M. Manganaro, S. Mangano, K. Mannheim, M. Mariotti, M. Mart'inez, M. Mart'inez-Chicharro, A. Mas-Aguilar, D. Mazin, S. Menchiari, S. Mender, D. Miceli, T. Miener, J. Miranda, R. Mirzoyan, M. M. Gonz'alez, E. Molina, H. A. Mondal, A. Moralejo, D. Morcuende, T. Nakamori, C. Nanci, V. Neustroev, L. Nickel, M. Rosillo, C. Nigro, L. Nikoli'c, K. Nilsson, K. Nishijima, T. Ekoume, K. Noda, L. Nogués, S. Nozaki, Y. Ohtani, A. Okumura, J. Otero-Santos, S. Paiano, M. Palatiello, D. Paneque, R. Paoletti, J. Paredes, M. Peresano, M. Persic, M. Pihet, G. Pirola, F. Podobnik, P. Moroni, E. Prandini, G. Principe, C. Priyadarshi, W. Rhode, M. Rib'o, J. Rico, C. Righi, N. Sahakyan, T. Saito, F. Saturni, B. Schleicher, K. Schmidt, F. Schmuckermaier, J. L. Schubert, T. Schweizer, A. Sciaccaluga, G. Silvestri, J. Sitarek, V. Sliusar, D. Sobczynska, A. Stamerra, J. Strivskovi'c, D. Strom, Y. Suda, H. Tajima, M. Takahashi, R. Takeishi, F. Tavecchio, P. Temnikov, K. Terauchi, T. Terzi'c, M. Teshima, S. Truzzi, A. Tutone, S. Ubach, J. Scherpenberg, M. Acosta, S. Ventura, I. Viale, C. Vigorito, V. Vitale, I. Vovk, R. Walter, M. Will, C. Wunderlich, T. Yamamoto, J. I. F. C. Research, T. U. O. Tokyo, Kashiwa, 277-8582 Chiba, Japan, E. Zurich, CH-8093 Zurich, Switzerland, U. Siena, I. Pisa, I-53100 Siena, Italy, Institut de F'isica d'Altes Energies, T. Z. F. O. Science, Technology, E-08193 Bellaterra, Spain., U. Barcelona, Iccub, IEEC-UB, E. Barcelona, Instituto de Astrof'isica de Andaluc'ia-CSIC, Glorieta de la Astronom'ia sn, 18008, Granada, National Centre for Radio Astrophysics, I-00136 Rome, U. Udine, I. Trieste, I. Udine, M. F. Physik, D. Garching, Germany, U. Padova, Infn, I-35131 Padova, C. Zagreb, Faculty of Electrical Engineering, Computing, 10000 Zagreb, Croatia., I. Institute, Emftel Department, U. Madrid, E. Madrid, Centro Brasileiro de Pesquisas F'isicas, 22290-180 Urca, R. Janeiro, Brazil, Instituto de Astrof'isica de Canarias, D. Astrof'isica, U. L. Laguna, E-38200, La Laguna, Tenerife, U. Lodz, F. O. Physics, Applied Informatics, D. O. Astrophysics, 9. Lodz, Poland., Centro de Investigaciones Energ'eticas, Medioambientales y Tecnol'ogicas, Departament de F'isica, CERES-IEEC, U. Barcelona, U. Pisa, I. Pisa, I. Bari, D. Bari, I. Bari, Department for Physics, Universityof Bergen, Norway, I. Torino, U. Torino, I. Torino, I. Catania, D. Astronomia, U. Catania, I. Catania, U. Wurzburg, D-97074 Wurzburg, Technische Universitat Dortmund, D. Dortmund, U. Geneva, 16 Chemind'Ecogia, CH-1290 Versoix, Japanese Magic Group Physics Program, Graduate School of Science, Engineering, H. University, 739-8526 Hiroshima, D. Elektronen-Synchrotron, D. Zeuthen, Armenian Magic Group ICRANet-Armenia, 0019 Yerevan, Armenia, C. Split, M. Engineering, Naval Architecture, 21000 Split, Croatia Croatian Magic Group Josip Juraj Strossmayer Unive Osijek, Department of Applied Physics, 31000 Osijek, Finnish Magic Consortium Finnish Centre of Astronomy with Eso, Astronomy, U. Turku, F. Turku, Finland, J. D. O. Physics, T. University, Hiratsuka, 259-1292 Kanagawa, S. S. I. O. Physics, A. Institute, Kolkata 700064, West Bengal, India., Inst. for Nucl. Research, Nucl. Energy, B. A. O. Sciences, BG-1784 Sofia, Bulgaria., C. Rijeka, 51000 Rijeka, Yamagata University, Yamagata 990-8560, Finnish Magic Group Space Physics, A. Unit, U. Oulu, F. Oulu, Japanese Magic Group Chiba University, Icehap, 277-8582 Chiba, J. I. F. C. Research, Kobayashi-Maskawa Institute for the Origin of Particles, the Universe, Nagoya University, 464-6801 Nagoya, Kyoto University, 606-8502 Kyoto, I. Vergata, Infn Roma, K. University, Kobe, Hyogo 658-8501, A. M. C. F. Astrophysics, Romé, also at Port d'Informaci'o Cient'ifica, A. D. O. Physics, U. Oslo, A. N. D. D. Fisica, Universita di UdineI.N.F.N. Trieste, I. Trieste, also at Inaf Padova   +371 more
semanticscholar   +1 more source

Vortices, infrared effects and Lorentz invariance violation

Physics Letters B, 2006
La teoría de Yang-Mills con campos no conmutativos se construye siguiendo métodos hamiltonianos y lagrangeanos. Esta modificación de la teoría estándar de Yang-Mills arrojó luz sobre el mecanismo de confinamiento visto como un efecto de violación de la invariancia de Lorentz (LIV).
H. Falomir, J. Gamboa, Justo López-Sarrión, F. Méndez, A.J. da Silva   +4 more
openaire   +7 more sources

Approaches to photon absorption in a Lorentz invariance violation scenario [PDF]

Physical Review D
Very high-energy astrophysical gamma rays suffer a suppression of their flux along their propagation due to their interaction, through the γγ→e+e− pair-production process, with the soft photon backgrounds present in the Universe.
J. Carmona, J. Cortés, F. Rescic, M. Reyes, T. Terzi'c, F. I. Vrban   +5 more
semanticscholar   +1 more source

New limits on the local Lorentz invariance violation of gravity in the standard model extension with pulsars [PDF]

Physical Review D, 2023
Lorentz Violation (LV) is posited as a possible relic effect of quantum gravity at low energy scales. The Standard-Model Extension provides an effective field-theoretic framework for examining possible deviations attributed to LV.
Yiming Dong, Ziming Wang, Lijing Shao
semanticscholar   +1 more source

Crossing of the Phantom Divided Barrier with Lorentz Invariance Violating Fields [PDF]

, 2008
We study possible crossing of the phantom divided barrier in a Lorentz invariance violating dark energy model. Lorentz invariance violation which is achieved by introducing a vector field in the action, incorporates directly in the dynamics of the scalar
Arianto, K. Nozari, Nesseris S., Riess A. G., S. D. Sadatian, Sadatian S. D. Nozari K., Wei H.   +6 more
core   +1 more source

Lorentz invariance violation in the neutrino sector: a joint analysis from big bang nucleosynthesis and the cosmic microwave background

European Physical Journal C: Particles and Fields, 2017
We investigate constraints on Lorentz invariance violation in the neutrino sector from a joint analysis of big bang nucleosynthesis and the cosmic microwave background.
Wei-Ming Dai, Zong-Kuan Guo, Rong-Gen Cai, Yuan-Zhong Zhang   +3 more
doaj   +1 more source

Lorentz invariance and quantum gravity: an additional fine-tuning problem? [PDF]

, 2004
Trying to combine standard quantum field theories with gravity leads to a breakdown of the usual structure of space-time at around the Planck length, 1.6*10^{-35} m, with possible violations of Lorentz invariance.
Collins, John, Perez, Alejandro, Sudarsky, Daniel, Urrutia, Luis, Vucetich, Héctor   +4 more
core   +2 more sources