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arXiv · hep-ph/9808423

On the Observability of "Invisible" / "Nearly Invisible" Charginos

Amitava Datta·Shyamapada Maity
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Abstract

It is shown that if the charginos decay into very soft leptons or hadrons + $\not{E}$ due to degeneracy/ near- degeneracy with the LSP or the sneutrino, the observability of the recently proposed signal via the single photon (+ soft particles) + $\not{E}$ channel crucially depends on the magnitude of the $\SNU$ mass due to destructive interferences in the matrix element squared. If the $\SNU$'s and, consequently, left-sleptons are relatively light, the size of the signal, previously computed in the limit $\MSNU \to \infty$ only, is drastically reduced. We present the formula for the signal cross section in a model independent way and discuss the observability of the signal at LEP 192 and NLC energies.

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Amitava Datta, Shyamapada Maity. 1998-08-26. On the Observability of "Invisible" / "Nearly Invisible" Charginos. https://doi.org/10.1103/physrevd.59.055019

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