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Schrodinger's Dog
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http://arxiv.org/PS_cache/hep-ph/pdf/0601/0601236.pdf
Anyone seen this?:-
You'll probablly have to read the PDF to get a good view as the layout get's a bit mangled by the forum.
Here's the source paper, sounds interesting if a little speculative? Thoughts?Praise? condemnation, sneering indignation?
edited for length - please only post a brief portion of the article and allow people to download themselves. Thanks.
Anyone seen this?:-
You'll probablly have to read the PDF to get a good view as the layout get's a bit mangled by the forum.
Here's the source paper, sounds interesting if a little speculative? Thoughts?Praise? condemnation, sneering indignation?
arXiv:hep-ph/0601236 v1 27 Jan 2006
Very Special Relativity
Andrew G. Cohen and Sheldon L. Glashow†
Physics Department, Boston University
Boston, MA 02215, USA
(Dated: Jan 26, 2006)
By Very Special Relativity (VSR) we mean descriptions of nature whose space-time symmetries
are certain proper subgroups of the Poincar´e group. These subgroups contain space-time translations
together with at least a 2-parameter subgroup of the Lorentz group isomorphic to that generated
by Kx + Jy and Ky − Jx. We find that VSR implies special relativity (SR) in the context of local
quantum field theory or of CP conservation. Absent both of these added hypotheses, VSR provides
a simulacrum of SR for which most of the consequences of Lorentz invariance remain wholly or
essentially intact, and for which many sensitive searches for departures from Lorentz invariance
must fail. Several feasible experiments are discussed for which Lorentz-violating eects in VSR may
be detectable.
Special relativity (SR) is based on the hypothesis that
the laws of physics share many of the symmetries of
Maxwell’s equations. Whereas the maximal symmetry
group of Maxwell’s equations is the 15-parameter confor-
mal group SU(2, 4), the existence of particles with mass
(and the known violations of P and T ) constrains space-
time symmetry to be no greater than the Poincar´e group
(the connected component of the Lorentz group along
with space-time translations). The special theory of rel-
ativity identifies this group as the symmetry of nature.
Although no decisive departure from exact Lorentz
invariance has yet been detected, ever more sensitive
searches should be and are being carried out. A per-
turbative framework has been developed to investigate a
certain class of departures from Lorentz invariance. For
example, Coleman and Glashow[1, 2] consider the case of
space-time translations along with exact rotational sym-
metry in the rest frame of the cosmic background radia-
tion, but allow small departures from boost invariance
in this frame. Perturbative departures from Lorentz-
invariance are then readily parametrized in terms of a
fixed time-like 4-vector or ‘spurion.’ Others[3, 4] consider
the introduction into the Lagrangian of more general
spurion-mediated perturbations (sometimes referred to
as ‘expectation values of Lorentz tensors following spon-
taneous Lorentz breaking.’)
edited for length - please only post a brief portion of the article and allow people to download themselves. Thanks.
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