Gravitational Waves as a Probe of the Gravitino Mass
نویسندگان
چکیده
If gaugino condensations occur in the early universe, domain walls are produced as a result of the spontaneous breaking of a discrete R symmetry. Those domain walls eventually annihilate with one another, producing the gravitational waves. We show that the gravitational waves can be a probe for measuring the gravitino mass, if the constant term in the superpotential is the relevant source of the discrete R symmetry breaking.
منابع مشابه
امواج گرانشی حرارتی در فاز شتابدار کیهان
Gravitational waves are considered in thermal vacuum state. The amplitude and spectral energy density of gravitational waves are found enhanced in thermal vacuum state compared to its zero temperature counterpart. Therefore, the allowed amount of enhancement depends on the upper bound of WMAP-5 and WMAP-7 for the amplitude and spectral energy density of gravitational waves. The enhancement of ...
متن کاملGravitational production of gravitinos
It was realized early on [1] that the gravitino could pose a serious cosmological problem in the context of a hot Big-Bang, if it were once in thermal equilibrium. An unstable gravitino, for instance, would decay in the post-BigBang nucleosynthesis era, if its mass m3/2 ∼ 10 GeV, and the entropy produced would ruin the successes of Big-Bang nucleosynthesis. Similarly, if the gravitino were stab...
متن کاملLow-energy Gravitino Interactions *
It is well known that the solution of the hierarchy problem in supersymmetric extensions of the Standard Model (SM) requires a mass splitting ∆m ∼ 1 TeV between ordinary particles and their superpartners. This requirement, however, leaves largely undetermined the supersymmetrybreaking scale √ F , or, equivalenty, the gravitino mass m3/2 = F/( √ 3MP ), MP being the Planck mass. The ratio ∆m /F i...
متن کاملRemarks on Graviton Propagation in Light of GW 150914
The observation of gravitational waves from the Laser Interferometer Gravitational-Wave Observatory (LIGO) event GW150914 may be used to constrain the possibility of Lorentz violation in graviton propagation, and the observation by the Fermi Gamma-Ray Burst Monitor of a transient source in apparent coincidence may be used to constrain the difference between the velocities of light and gravitati...
متن کاملar X iv : h ep - p h / 97 07 53 6 v 2 4 A ug 1 99 7 UAB – FT – 421 July 1997 Gravitinos from Gravitational Collapse
We reanalyse the limits on the gravitino mass m 3/2 in superlight gravitino scenarios derived from arguments on energy-loss during gravitational collapse. We conclude that the mass range 10 −6 eV ≤ m 3/2 ≤ 2.3 × 10 −5 eV is excluded by SN1987A data. In terms of the scale of supersymmetry breaking Λ, the range 70GeV ≤ Λ ≤ 300GeV is not allowed.
متن کامل