The LEP2 experiments pose a serious naturalness problem for supersymmetric models. The problem is stronger in gauge mediation than in supergravity models. Particular scenarios, like electroweak baryogenesis or gauge mediation with light messengers, are strongly disfavoured. Searching a theoretical reason that naturally explains why supersymmetry has not been found poses strong requests on model building. If instead an unlikely (p\approx 5%) numerical accident has hidden supersymmetry to LEP2, we compute the naturalness distribution of values of allowed sparticle masses and supersymmetric loop effects. We find that b to s gamma remains a very promising signal of minimal supersymmetry even if there is now a 20% (4%) probability that coloured particles are heavier than 1 TeV (3 TeV). We study how much other effects are expected to be detectable.

Giusti, L., Romanino, A., Strumia, A. (1999). Natural ranges of supersymmetric signals. NUCLEAR PHYSICS. B, 550(1-2), 3-31 [10.1016/S0550-3213(99)00153-4].

Natural ranges of supersymmetric signals

GIUSTI, LEONARDO;
1999

Abstract

The LEP2 experiments pose a serious naturalness problem for supersymmetric models. The problem is stronger in gauge mediation than in supergravity models. Particular scenarios, like electroweak baryogenesis or gauge mediation with light messengers, are strongly disfavoured. Searching a theoretical reason that naturally explains why supersymmetry has not been found poses strong requests on model building. If instead an unlikely (p\approx 5%) numerical accident has hidden supersymmetry to LEP2, we compute the naturalness distribution of values of allowed sparticle masses and supersymmetric loop effects. We find that b to s gamma remains a very promising signal of minimal supersymmetry even if there is now a 20% (4%) probability that coloured particles are heavier than 1 TeV (3 TeV). We study how much other effects are expected to be detectable.
Articolo in rivista - Articolo scientifico
supersymmetry, gauge theory, flavor physics
English
1999
550
1-2
3
31
none
Giusti, L., Romanino, A., Strumia, A. (1999). Natural ranges of supersymmetric signals. NUCLEAR PHYSICS. B, 550(1-2), 3-31 [10.1016/S0550-3213(99)00153-4].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/24774
Citazioni
  • Scopus 97
  • ???jsp.display-item.citation.isi??? 96
Social impact