Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-02-24
Phys.Rev. D68 (2003) 035006
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, 2 figures, [v2] reference added, [v3] Eq. (9) corrected, results unaffected, [v4] version to be published in Phys. R
Scientific paper
10.1103/PhysRevD.68.035006
We address the tachyonic slepton problem of anomaly mediated supersymmetry breaking using abelian D-terms. We demonstrate that the most general extra U(1) symmetry that does not disrupt gauge coupling unification has a large set of possible charges that solves the problem. It is shown that previous studies in this direction that added both an extra hypercharge D-term and another D-term induced by B-L symmetry (or similar) can be mapped into a single D-term of the general ancillary U(1)_a. The U(1)_a formalism enables identifying the sign of squark mass corrections which leads to an upper bound of the entire superpartner spectrum given knowledge of just one superpartner mass.
Murakami Brandon
Wells James Daniel
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