Browsing by Author "Ahluwalia, D.V."

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Evidence for majorana neutrinos : Dawn of a new ear in spacetime structure
(2011-07-05) Ahluwalia, D.V.
We show that Majorana particles belong to the Wigner class of fermions in which the charge conjugation and the parity operators commute, rather than anticommute. Rigorously speaking, Majorana spinors do not satisfy the Dirac equation [a result originally due toM. Kirchbach, which we re-render here]. Instead, they satisfy a differentwave equation, which we derive. This allows us to reconcile St ¨uckelberg-Feynman interpretation with the Majorana construct. We present several new properties of neutral particle spinors and argue that discovery of Majorana particles constitutes dawn of a new era in spacetime structure.
On the spin of gravitational bosons
(2002-02-01) Ahluwalia, D.V.; Dadhich, Naresh; Kirchbach, M.
We unearth spacetime structure of massive vector bosons, gravitinos, and gravitons. While the curvatures associated with these particles carry a deﬁnite spin, the un- derlying potentials cannot be, and should not be, interpreted as single spin objects. For instance, we predict that a spin measurement in the rest frame of a massive gravitino will yield the result 3/2 with probability one half, and 1/2 with probabil- ity one half. The simplest scenario leaves the Riemannian curvature unaltered; thus avoiding conﬂicts with classical tests of the theory of general relativity. However, the quantum structure acquires additional contributions to the propagators, and it gives rise to additional phases
Operational indistinguishabilty of doubly special relativities from special relativity
(2011-07-05) Ahluwalia, D.V.
We argue that existing doubly special relativities may not be operationally distinguishable from the special relativity. In the process we point out that some of the phenomenologically motivated modiﬁcations of dispersion relations, and arrived conclusions, must be reconsidered. Finally, we reﬂect on the possible conceptual issues that arise in quest for a theory of spacetime with two invariant scales.