Signatures of massive sgoldstinos at e+e- colliders

Details Signatures of massive sgoldstinos at e+e- colliders Signatures of massive sgoldstinos at e+e- colliders

2000-01-04

arxiv.org/abs/hep-ph/0001025v2

Nucl.Phys.B574:3-22,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages, 8 figures. Published version with note added

Scientific paper

10.1016/S0550-3213(00)00055-9

In supersymmetric extensions of the Standard Model with a very light gravitino, the effective theory at the weak scale should contain not only the goldstino G, but also its supersymmetric partners, the sgoldstinos. In the simplest case, the goldstino is a gauge-singlet and its superpartners are two neutral spin-0 particles, S and P. We study possible signals of massive sgoldstinos at e+e- colliders, focusing on those that are most relevant at LEP energies. We show that the LEP constraints on e+e- => photon+S (photon+P), Z+S (Z+P) or e+e-S (e+e-P), followed by S (P) decaying into two gluon jets, can lead to stringent combined bounds on the gravitino and sgoldstino masses.

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