Fifth
Force| Fifth
Force |
In General > s.a. Hyperphoton.
* Idea: A hypothetical force that could be coupled to a combination B cos
+ S sin of baryon number and strangeness (hypercharge
seems antiquated).
* Dependence on the material:
It arises, e.g., because near the center of the periodic table nuclear binding
is tightest, and B/mass highest.
* Potential: Parametrized by a Yukawa-type form; If Y1 and Y2 are the hypercharges of the two particles involved,
U(r) = f 2 Y1 Y2 exp{–r/
}/
r.
Phenomenology and Tests > s.a. Eötvös
Experiment; tests
of general relativity and of newtonian
gravitation.
* History: Some indications
had been coming from geophysical methods of testing newtonian
gravitation,
but it became famous with the reanalysis of the Eötvös data by
Fischbach et al (1986), following anomalous results in neutral K experiments
at Fermilab, which could be explained by a long range force coupled to Y;
It stimulated many new gravitational gradiometer, free fall, Cavendish or
Eötvös-type
experiments.
* Bounds: 2005, At the
au-scale,
planet motion studies constrain the strength of this force to
a
10–12–10–13 level.
@ Tests and bounds:
Iorio gq/05/PSS
[au-scale,
from
planet motion]; Farrar & Rosen PRL(07) + pw(07)may [galaxy cluster-scale, from
Bullet
Cluster].
> Related topics: see dark matter.
References
@ General: Fischbach et al PRL(86),
PRL(86), AP(88);
De Rújula PLB(86);
Eckhardt PRL(86);
Nussinov
PRL(86);
Thieberger PRL(87);
Nieto et al PRD(88);
Burgess & Cloutier PRD(88)
[from binary precession]; Fischbach & Talmadge
Nat(92)mar;
Franklin
93; Romaides et al PRD(97)
[tower experiment].
@ News: Stubbs Nat(89)mar;
Waldrop Sci(89)nov; NS(90)jul21,
p18.
@ From 5th dimension: Wesson et al PLB(99);
Dahia et al MPLA(03).
@ Related topics: Krauss PT(08)oct
[re spoof].
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send feedback and suggestions to bombelli at olemiss.edu – modified 3 oct
2008