Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-07-27
Phys.Rev. D71 (2005) 035004
Physics
High Energy Physics
High Energy Physics - Theory
8 pages,latex,revised and typos corrected, To appear in Physical Review D
Scientific paper
10.1103/PhysRevD.71.035004
We investigate the split supersymmetry (SUSY) scenario recently proposed by Arkani-Hamed and Dimopoulos, where the scalars are heavy but the fermions are within the TeV range. We show that the sparticle spectrum in such a case crucially depends on the specific details of the mechanism underlying the SUSY breaking scheme, and the accelerator signals are also affected by it. In particular, we demonstrate in the context of a braneworld-inspired model, used as illustration in the original work, that a new fermion $\psi_X$, arising from the SUSY breaking sector, is shown to control low-energy phenomenology in several cases. Also, SUSY signals are characterised by the associated production of the light neutral Higgs. In an alternative scenario where the gauginos are assumed to propagate in the bulk, we find that gluinos can be heavy and short-lived, and the SUSY breaking scale can be free of cosmological constraints
Mukhopadhyaya Biswarup
SenGupta Soumitra
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