The slow gravitino
نویسندگان
چکیده
منابع مشابه
The Gravitino in Gaugino Mediation
We show that for gaugino mediated supersymmetry breaking the gravitino mass is bounded from below. For a size of the compact dimensions of order the unification scale and a cutoff given by the higher-dimensional Planck mass, we find m3/2 & 10GeV. In a large domain of parameter space, the gravitino is the lightest superparticle with a scalar τ̃ -lepton as the next-to-lightest superparticle. Email...
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 کاملModuli-induced gravitino problem.
We investigate the cosmological moduli problem by studying a modulus decay in detail and find that the branching ratio of the gravitino production is generically of O(0.01-1), which causes another cosmological disaster. Consequently, the cosmological moduli problem cannot be solved simply by making the modulus mass heavier than 100 TeV. We also illustrate our results by explicitly calculating t...
متن کاملThe Gravitino-Overproduction Problem in Inflationary Universe
We show that the gravitino-overproduction problem is prevalent among inflation models in supergravity. An inflaton field φ generically acquires (effective) nonvanishing auxiliary field G Φ , if the Kähler potential is non-minimal. The inflaton field then decays into a pair of the gravitinos. We extensively study the cosmological constraints on G Φ for a wide range of the gravitino mass. For man...
متن کاملDetermining the Mass for a Light Gravitino
Gauge mediated supersymmetry breaking scenarios with an ultra-light gravitino of mass m3/2 = 1–10 eV are very interesting, since there is no cosmological gravitino problem. We propose a new experimental determination of the gravitino mass for such an ultra-light gravitino, by measuring a branching ratio of two decay modes of sleptons.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2014
ISSN: 1029-8479
DOI: 10.1007/jhep10(2014)121