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- W2012361275 abstract "Does the Special Theory of Relativity (STR) forbid the existence of particles traveling with speed greater than the speed of light in vacuo (Tachyons)? Prof. Sudarshan and collaborators O.M. Bilaniuk and V.K. Despande examined this question in 1962 and concluded that STR does not rule out such objects. Now, the momentum 4-vector of a Tachyon is necessarily space-like and consequently, the sign of energy no longer Lorentz-invariant. Thus a Tachyon will be found to have negative energy in certain inertial frames. The authors noted that in the latter, the sign of time-intervals will also be reversed. A negative energy Tachyon traveling backward in time could now be reinterpreted as a positive energy particle traveling forward in time. This reinterpretation could be done consistently as was shown by several examples. A quantum field theory of free spinless Tachyons was suggested by Feinberg (1967). M. Arons and Sudarshan reexamined this model and showed that the model did not possess invariance under the Poincaré group. An alternative version was constructed by them that possessed the desired invariance property but no local commutativity. Subsequently, Dhar and Sudarshan constructed a model of a neutral scalar Tachyon with Yukawa coupling to Fermions. The model had unusual features such as the emission of a Tachyon by a Fermion as a real process and the need for an additional non-local interaction. Prof. Sudarshan, in association with J. Narlikar, studied Tachyons in the context of cosmology in 1976. One of their conclusions is that any primordial Tachyons that might have been created at the beginning are unlikely to have survived to the present era." @default.
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- W2012361275 date "2009-11-01" @default.
- W2012361275 modified "2023-09-26" @default.
- W2012361275 title "Aspects of Tachyon theory" @default.
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- W2012361275 doi "https://doi.org/10.1088/1742-6596/196/1/012022" @default.
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