Lattices for 8 and 30 GeV proton drivers are described. The former is for a potential upgrade of the ISIS facility at RAL, and the latter for a possible neutrino factory driver in the ISR tunnel at CERN.
We discuss gauge-fixing, propagators and effective potentials for topological A-brane composites in Calabi-Yau compactifications. This allows for the construction of a holomorphic potential describing the low-energy dynamics of such systems, which generalizes the superpotentials known from the ungraded case. Upon using results of homotopy algebra, we show that the string field and low energy descriptions of the moduli space agree, and that the deformations of such backgrounds are described by a certain extended version of 'off-shell Massey products' associated with flat graded superbundles. As examples, we consider a class of graded D-brane pairs of unit relative grade. Upon computing the holomorphic potential, we study their moduli space of composites. In particular, we give a general proof that such pairs can form acyclic condensates, and, for a particular case, show that another branch of their moduli space describes condensation of a two-form.A. The deformed laplacian for a D-brane pair in a scalar background 34 B. Another approach to the tree level potential 35 2 The idea of such a potential goes back to the work of [14], and is also implicit in [25]. 3 We consider the large radius limit only, in order to avoid instanton corrections to the string field action.
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