تقرير
Time of flight of ultra-relativistic particles in a realistic Universe: a viable tool for fundamental physics?
| العنوان: | Time of flight of ultra-relativistic particles in a realistic Universe: a viable tool for fundamental physics? |
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| المؤلفون: | Fanizza, G., Gasperini, M., Marozzi, G., Veneziano, G. |
| سنة النشر: | 2015 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Theory |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics, General Relativity and Quantum Cosmology, High Energy Physics - Theory |
| الوصف: | Including the metric fluctuations of a realistic cosmological geometry we reconsider an earlier suggestion that measuring the relative time-of-flight of ultra-relativistic particles can provide interesting constraints on fundamental cosmological and/or particle parameters. Using convenient properties of the geodetic light-cone coordinates we first compute, to leading order in the Lorentz factor and for a generic (inhomogeneous, anisotropic) space-time, the relative arrival times of two ultra-relativistic particles as a function of their masses and energies as well as of the details of the large-scale geometry. Remarkably, the result can be written as an integral over the unperturbed line-of-sight of a simple function of the local, inhomogeneous redshift. We then evaluate the irreducible scatter of the expected data-points due to first-order metric perturbations, and discuss, for an ideal source of ultra-relativistic particles, the resulting attainable precision on the determination of different physical parameters. Comment: 6 pages, 2 figures, Typos corrected, clarifications and a reference added. Version accepted for publication in Physics Letter B |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.physletb.2016.04.032 |
| URL الوصول: | http://arxiv.org/abs/1512.08489 |
| رقم الأكسشن: | edsarx.1512.08489 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.physletb.2016.04.032 |
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