Browsing by Author "Iengo, Roberto"

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    Cross sections for production of closed superstrings at high energy colliders in brane world models
    (2005) Chialva, Diego; Iengo, Roberto; Russo, Jorge G.; Physics; Elementary Particle Theory
    In brane world string models with large extra dimensions, there are processes where fermion and antifermion (or two gluons) can annihilate producing a light particle (e.g. gluon) carrying transverse momentum and a Kaluza-Klein graviton or an excited closed string that propagates in the extra dimensions. In high energy colliders, this process gives a missing momentum signature. We compute the total cross section for this process within the context of type II superstring theory in the presence of a D brane. This includes all missing energy sources for this string theory model up to s = 8M2 s , and it can be used to put new limits on the string scale Ms.