کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1848668 1528799 2016 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Time of flight of ultra-relativistic particles in a realistic Universe: A viable tool for fundamental physics?
ترجمه فارسی عنوان
زمان پرواز ذرات فوق العاده نسبیتی در جهان واقعی: ابزار قابل قبول برای فیزیک بنیادی؟
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک هسته ای و انرژی بالا
چکیده انگلیسی

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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters B - Volume 757, 10 June 2016, Pages 505–509
نویسندگان
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