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style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none"><B>From:</B>
<A title=David.Duffy@qimr.edu.au href="mailto:David.Duffy@qimr.edu.au">David
Duffy</A> </DIV>
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Hajdukovic concludes:<BR><BR></DIV>
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style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">the
gravitational properties of antimatter [will] be tested in CERN before
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">the
end of the current decade (Kellerbauer et al. 2008) and that the <BR></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">recent
theoretical considerations give some support to the gravitational <BR></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">repulsion
between matter and antimatter (Villata 2011).<BR><BR></DIV>
<DIV style="DISPLAY: inline; FONT-FAMILY: ; COLOR: ; TEXT-DECORATION: ">>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">So,
was this idea already floating around in the 60-70's?</DIV></DIV>
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style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none"> </DIV></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">It’s
been floating around since antimatter was theorised / discovered. It’s
very difficult to test because you really want a heavy antimatter particle with
no electric charge, i.e. a cold antimatter atom. AFAIK they are working on
making them. </DIV></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none"> </DIV></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">It
basically kills general relativity if it’s correct (and not before time
IMO). The interesting thing as I see it is that we know energy (e.g.
light) is definitely attracted / bent towards the gravitational field of
matter. If the opposite applies to antimatter, this is a huge asymmetry,
as there is no anti-light. If it bends towards both, that’s...
puzzling. </DIV></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none"> </DIV></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">One
example of a problem: if antimatter repels matter and you could switch at will
between a mix of matter and antimatter and a box of photons, you could switch
gravity on and off, because a box of light is definitely attracted to
matter. That seems hard to mesh with the concept of gravity as a long
range field. Though maybe I just discovered how flyers work
;-)</DIV></DIV>
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<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">-
Gerry Quinn </DIV></DIV></DIV></DIV></BODY></HTML>