This is a study of the phenomenology of the neutralino dark matter in the so called deflected anomaly mediation scenario. This scheme is obtained from the minimal anomaly-mediated scenario by introducing a gauge-mediated sector with N-f messenger fields. Unlike the former scheme the latter has no tachyons. We find that the neutralino is still the LSP in a wide region of the parameter space: it is essentially a pure bino in the scenario with N-f=1 while it can also be a pure Higgsino for N-f > 1. This is very different from the naive anomaly-mediated scenario which predicts a wino like neutralino. Moreover we do not find any tachyonic scalars in this scheme. After computing the relic density (considering all the possible coannihilations) we find that there are regions in the parameter space with values compatible with the latest WMAP results with no need to consider moduli fields that decay in the early universe.

Cesarini, A., Fucito, F., Lionetto, A.m. (2007). Deflected anomaly mediation and neutralino dark matter. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 75(2) [10.1103/PhysRevD.75.025026].

Deflected anomaly mediation and neutralino dark matter

LIONETTO, ANDREA MICHELE
2007-01-01

Abstract

This is a study of the phenomenology of the neutralino dark matter in the so called deflected anomaly mediation scenario. This scheme is obtained from the minimal anomaly-mediated scenario by introducing a gauge-mediated sector with N-f messenger fields. Unlike the former scheme the latter has no tachyons. We find that the neutralino is still the LSP in a wide region of the parameter space: it is essentially a pure bino in the scenario with N-f=1 while it can also be a pure Higgsino for N-f > 1. This is very different from the naive anomaly-mediated scenario which predicts a wino like neutralino. Moreover we do not find any tachyonic scalars in this scheme. After computing the relic density (considering all the possible coannihilations) we find that there are regions in the parameter space with values compatible with the latest WMAP results with no need to consider moduli fields that decay in the early universe.
2007
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/01 - FISICA SPERIMENTALE
English
Senza Impact Factor ISI
dynamical supersymmetry breaking; local supersymmetry; n=1 supergravity; renormalization; mass
http://prd.aps.org/pdf/PRD/v75/i2/e025026
Cesarini, A., Fucito, F., Lionetto, A.m. (2007). Deflected anomaly mediation and neutralino dark matter. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 75(2) [10.1103/PhysRevD.75.025026].
Cesarini, A; Fucito, F; Lionetto, Am
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/8026
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