Phenomenological constraints on low-scale gravity
- INFN, Laboratori Nazionali del Gran Sasso, I-67010 Assergi (AQ) (Italy) and Institute for Nuclear Research of the RAS, Moscow (Russian Federation)
We study the constraints on gravity scale M{sub P} in extra-dimension gravitational theory, obtained from gravity-induced processes. The obtained constraints are subdivided into strong (though not robust) and reliable (though less strong). The strong constraints can be in principle relaxed due to some broken gauge symmetries, e.g. family symmetry. The strongest constraint is given by neutrino oscillations. For different assumptions the lower bound on M{sub P} is 10{sup 15}-10{sup 18} GeV. However, it can be, in principle, reduced by broken family symmetry. More reliable bounds are due to flavor-conserved operators or those which change the flavors within one family. These bounds, obtained using the electron mass and width of {pi}{yields}e{nu} decay, are 1x10{sup 5} GeV and 5x10{sup 5} GeV, for these two cases, respectively.
- OSTI ID:
- 20933294
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 10; Other Information: DOI: 10.1103/PhysRevD.75.105001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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