TY - GEN digital ID - 131563198 TI - The Rise and Fall of the Fifth Force : Discovery, Pursuit, and Justification in Modern Physics AU - Franklin, Allan AU - Fischbach, Ephraim PY - 2016 SN - 9783319284125 PB - Cham Springer International Publishing DB - UniCat KW - Philosophy of science KW - Space research KW - Astronomy KW - History of physics KW - Measuring methods in physics KW - Theory of relativity. Unified field theory KW - Physics KW - Chemical laboratory practice KW - Geophysics KW - zwaartekracht KW - procescontrole KW - laboratoriuminstrumenten KW - meetkundige instrumenten KW - metingen KW - meettechniek KW - wetenschapsfilosofie KW - fysica KW - relativiteitstheorie KW - ruimte (astronomie) KW - astronomie KW - micro-elektronica KW - elektrische meettechniek UR - https://www.unicat.be/uniCat?func=search&query=sysid:131563198 AB - 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 Eötvos 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. <. ER -