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The Rise and Fall of the Fifth Force - Discovery, Pursuit, and Justification in Modern Physics (Paperback, Softcover reprint of the original 2nd ed. 2016)
Loot Price: R2,256
Discovery Miles 22 560
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The Rise and Fall of the Fifth Force - Discovery, Pursuit, and Justification in Modern Physics (Paperback, Softcover reprint of the original 2nd ed. 2016)
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This book provides the reader with a detailed and captivating
account of the story where, for the first time, physicists ventured
into proposing a new force of nature beyond the four known ones -
the electromagnetic, weak and strong forces, and gravitation -
based entirely on the reanalysis of existing experimental data.
Back in 1986, Ephraim Fischbach, Sam Aronson, Carrick Talmadge and
their collaborators proposed a modification of Newton's Law of
universal gravitation. Underlying this proposal were three
tantalizing pieces of evidence: 1) an energy dependence of the CP
(particle-antiparticle and reflection symmetry) parameters, 2)
differences between the measurements of G, the universal
gravitational constant, in laboratories and in mineshafts, and 3) a
reanalysis of the Eoetvos experiment, which had previously been
used to show that the gravitational mass of an object and its
inertia mass were equal to approximately one part in a billion. The
reanalysis revealed that, contrary to Galileo's position, the force
of gravity was in fact very slightly different for different
substances. The resulting Fifth Force hypothesis included this
composition dependence and also added a small distance dependence
to the inverse-square gravitational force. Over the next four years
numerous experiments were performed to test the hypothesis. By 1990
there was overwhelming evidence that the Fifth Force, as initially
proposed, did not exist. This book discusses how the Fifth Force
hypothesis came to be proposed and how it went on to become a
showcase of discovery, pursuit and justification in modern physics,
prior to its demise. In this new and significantly expanded
edition, the material from the first edition is complemented by two
essays, one containing Fischbach's personal reminiscences of the
proposal, and a second on the ongoing history and impact of the
Fifth Force hypothesis from 1990 to the present.
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