--- title: "The Physics of the Sagnac-Mashoon Effects • CBPF Index" description: "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." canonical_url: "https://index.cbpf.br/en/publicacoes/6ad2a767639f62b11adbb587" locale: en meta: "og:description": "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." "og:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_The%2BPhysics%2Bof%2Bthe%2BSagnac-Mashoon%2BEffects%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~SXZhbm8gRGFtacOjbyBTb2FyZXM7IEphaW1lIFRpb21ubw%2Cdetalhe_1995%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmI1ODci%2Cs_V1MyzLw6GTwXG6dp.png" "og:image:height": "600" "og:image:type": image/png "og:image:width": "1200" "og:title": "The Physics of the Sagnac-Mashoon Effects • CBPF Index" "twitter:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_The%2BPhysics%2Bof%2Bthe%2BSagnac-Mashoon%2BEffects%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~SXZhbm8gRGFtacOjbyBTb2FyZXM7IEphaW1lIFRpb21ubw%2Cdetalhe_1995%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmI1ODci%2Cs_V1MyzLw6GTwXG6dp.png" --- > Index of every page on this site: [llms.txt](https://index.cbpf.br/llms.txt) **Physics Note****Published** # **The Physics of the Sagnac-Mashoon Effects** **Ivano Damião Soares; Jaime Tiomno** 1995 [**Download PDF **0.1 MB](https://index.cbpf.br/files/publicacao/6ad2a767639f62b11adbb587/pdf) [**Contact owner**](mailto:apub@cbpf.br?subject=The%20Physics%20of%20the%20Sagnac-Mashoon%20Effects) ## **Publication details**
Authors
Ivano Damião Soares; Jaime Tiomno
Type
Physics Note
Status
Published
Publication date
1995
Description
We carry out a complete examination of the effects of rotation on the physics of spin-1/2 particles. The origin of these effects is connected to the fact that the frame of the rotating experiment is Fermi-Walker transported, and is related to the inertia rest frame (with respect to which the apparatus rotates with angular velocity <math>\vec{\omega}</math>) by a Lorentz boost with instantaneous velocity <math>\vec{\omega}\wedge \vec{R}</math> plus a time dependent spatial rotation. Two distinct sets of effects are obtained. The first depends on the spin-rotation interaction, and consists of the Mashoon effect and a mass split effect due to the Lorentz boost mentioned above. In a neutron interferometer the latter effect produces a phase shift smaller than the Mashoon phase shift by a factor of order <math>0(v^2/c^2)\!\,</math> , where v is the velocity of the particles in the beams of the interferometer. The detection of the Mashoon effect is crucial to decide if free spin-1/2 particles actually behave a gyroscopes. The second set appears already in the eikonal approximation and is due to the dragging of the particles by the rotating apparatus, boosting the four momentum of the particles; it results in the Sagnac effect. We also discuss a criterion to fix the frame of the experiment among all mathematically admissible frames in the Brill-Wheeler formulation, and show that frames used in the literature to derive the Sagnac-Mashoon effect cannot be physically realized.
Year
1995
Number
CBPF-NF-051/95
Linked to a thesis
No
Linked to a grant
No
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