the rise and fall of the fifth force discovery pursuit and justification in modern physics

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The Rise And Fall Of The Fifth Force

Author : Allan Franklin
ISBN : 9783319284125
Genre : Science
File Size : 44. 79 MB
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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 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.

The Rise And Fall Of The Fifth Force

Author : Allan Franklin
ISBN : 3319803484
Genre :
File Size : 24. 87 MB
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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 Eotvos 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.

Beyond Einstein

Author : David E. Rowe
ISBN : 9781493977086
Genre : Science
File Size : 48. 83 MB
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Beyond Einstein: Perspectives on Geometry, Gravitation, and Cosmology explores the rich interplay between mathematical and physical ideas by studying the interactions of major actors and the roles of important research communities over the course of the last century.

Selectivity And Discord

Author : Allan Franklin
ISBN : 9780822970705
Genre : Philosophy
File Size : 81. 42 MB
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Selectivity and Discord addresses the fundamental question of whether there are grounds for belief in experimental results. Specifically, Allan Franklin is concerned with two problems in the use of experimental results in science: selectivity of data or analysis procedures and the resolution of discordant results. By means of detailed case studies of episodes from the history of modern physics, Franklin shows how these problems can be--and are--solved in the normal practice of science and, therefore, that experimental results may be legitimately used as a basis for scientific knowledge.

No Easy Answers

Author : Allan Franklin
ISBN : 0822973278
Genre : Science
File Size : 20. 66 MB
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Offers an accurate picture of science through the examination of nontechnical case studies which illustrate the various roles that experiment plays in science. Examines both sucessful and unsucessful experiments to show how scientists use experimental evidence and critical discussion to expand our knowlege of the natural world.

Can That Be Right

Author : A. Franklin
ISBN : 9789401153348
Genre : Science
File Size : 77. 91 MB
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In this collection of essays Allan Franklin defends the view that science provides us with knowledge about the world which is based on experimental evidence and on reasoned and critical discussion. In short, he argues that science is a reasonable enterprise. He begins with detailed studies of four episodes from the history of modern physics: (1) the early attempts to detect gravity waves, (2) how the physics community decided that a proposed new elementary particle, 17-keV neutrino, did not exist, (3) a sequence of experiments on K meson decay, and (4) the origins of the Fifth Force hypothesis, a proposed modification of Newton's Law of Universal Gravitation. The case studies are then used to examine issues such as how discord between experimental results is resolved, calibration of an experimental apparatus and its legitimate use in validating an experimental result, and how experimental results provide reasonable grounds for belief in both the truth of physical theories and in the existence of the entities involved in those theories. This book is a challenge to the critics of science, both postmodern and constructivist, to provide convincing alternative explanations of the episodes and issues discussed. It should be of interest to philosophers, historians, and sociologists of science, and to scientists themselves.

Are There Really Neutrinos An Evidential History

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ISBN :
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File Size : 50. 17 MB
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Book Review Digest

Author :
ISBN : UOM:39015078261867
Genre : Bibliography
File Size : 85. 90 MB
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Perspectives On Science

Author :
ISBN : UCSD:31822022918981
Genre : Science
File Size : 75. 91 MB
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Contemporary Authors

Author : Gale Group
ISBN : 0787667064
Genre : Biography & Autobiography
File Size : 43. 56 MB
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Your students and users will find biographical information on approximately 300 modern writers in this volume of Contemporary Authors® .

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