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Testing CPT And Antigravity With Trapped Antihydrogen At ALPHA.

2015
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Release : 2015
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Book Synopsis Testing CPT And Antigravity With Trapped Antihydrogen At ALPHA. by : Andrea Capra

Download or read book Testing CPT And Antigravity With Trapped Antihydrogen At ALPHA. written by Andrea Capra. This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: High precision antihydrogen experiments allow tests of fundamental theoretical descriptions of nature. These experiments are performed with the ALPHA apparatus, where ultra-low energy antihydrogen is produced and confined in a magnetic trap. Antihydrogen spectroscopy is of primary interest for precision tests of CPT invariance - one of the most important symmetries of the Standard Model. In particular, the 1S-2S transition frequency in hydrogen is the most precisely known quantity in Physics thus measuring the same quantity with antihydrogen provides the most stringent comparison between matter and antimatter. Antimatter gravity is an open experimental question that deserves to be directly addressed in order to test the foundation of the General Theory of Relativity. Methods to produce, trap, detect and identify antihydrogen are presented in this work, alongside the first high precision measurement of an antihydrogen property, i.e., the electric neutrality of an antiatom. This measurement also constitutes a three-fold improvement to the measured value of the positron charge. The focus is then shifted to the proposed experiment to measure the antihydrogen gravitational acceleration, with particular attention to the antihydrogen detector.

Tests of CPT, Lorentz Invariance and the WEP with Antihydrogen

1999
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Release : 1999
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Book Synopsis Tests of CPT, Lorentz Invariance and the WEP with Antihydrogen by :

Download or read book Tests of CPT, Lorentz Invariance and the WEP with Antihydrogen written by . This book was released on 1999. Available in PDF, EPUB and Kindle. Book excerpt: Antihydrogen atoms, produced near rest, trapped in a magnetic well, and cooled to the lowest possible temperature (kinetic energy) could provide an extremely powerful tool for the search of violations of CPT and Lorentz invariance. Equally well, such a system could be used for searches of violations of the Weak Equivalence Principle (WEP) at high precision. The author describes his plans to form a significant number of cold, trapped antihydrogen atoms for comparative precision spectroscopy of hydrogen and antihydrogen and comment on possible first experiments.

Hypothetical Spacecraft and Interstellar Travel

2015-02-28 Science
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Release : 2015-02-28
Genre : Science
Kind : eBook
Book Rating : 929/5 ( reviews)

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Book Synopsis Hypothetical Spacecraft and Interstellar Travel by : Ezekiel Nygren

Download or read book Hypothetical Spacecraft and Interstellar Travel written by Ezekiel Nygren. This book was released on 2015-02-28. Available in PDF, EPUB and Kindle. Book excerpt: Hypothetical Spacecraft and Interstellar Travel collects information about the latest and greatest hypothetical spacecraft.

Antihydrogen Production, Trapping, and Antimatter Plasmas

2009
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Release : 2009
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Book Synopsis Antihydrogen Production, Trapping, and Antimatter Plasmas by :

Download or read book Antihydrogen Production, Trapping, and Antimatter Plasmas written by . This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt: Since 2002, experiments at CERN have been producing slow, but untrapped, antihydrogen. The ultimate goal of these experiments is to test CPT and the gravitational interactions of matter and antimatter. Most schemes to perform CPT and gravity tests require trapped antihydrogen, but trapping antihydrogen is much more difficult than merely synthesizing it. The principle problems that must be solved before we can trap are how to cool the antiprotons, and how to keep them cold during the synthesis process. While we have already learned how to cool antiprotons by ten orders of magnitude, we must cool them by four more orders of magnitude, a scale set by the relative size of the potentials of the antimatter plasmas from which the antiatoms are synthesized compared to the antihydrogen trap well depth. In this talk, I will discuss antihydrogen synthesis and some of the techniques we are developing to control the energy of the resultant antihydrogen.

Antihydrogen and Fundamental Physics

2020-07-19 Science
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Release : 2020-07-19
Genre : Science
Kind : eBook
Book Rating : 136/5 ( reviews)

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Book Synopsis Antihydrogen and Fundamental Physics by : Michael Charlton

Download or read book Antihydrogen and Fundamental Physics written by Michael Charlton. This book was released on 2020-07-19. Available in PDF, EPUB and Kindle. Book excerpt: The advent of high-precision antihydrogen spectroscopy has opened up the possibility of direct tests with unprecedented accuracy of some of the most fundamental principles of physics, notably Lorentz and CPT symmetry and the Einstein equivalence principle. This book reviews these principles, emphasising their interconnections in quantum field theory and general relativity and the special role of antimatter, and explores how they may be tested in current and forthcoming experiments on antihydrogen. Original research results relevant to the experimental programme of the ALPHA collaboration at CERN are presented, together with the implications for antihydrogen of proposed theories featuring novel `fifth-force' interactions.

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