TY - JOUR

T1 - The role of scalar and pseudoscalar fields in determining nucleosynthesis bounds on the scale of supersymmetry breaking

AU - Gherghetta, Tony

PY - 1998/3/26

Y1 - 1998/3/26

N2 - The effect of spin-0 goldstino superpartners is considered on the nucleosynthesis bounds arising when a superlight gravitino appears as an effective massless neutrino species. When the scalar and pseudoscalar superpartners are relativistic they will decouple at much later times than the goldstino and consequently will be the dominant effect when obtaining a nucleosynthesis bound on the scale of supersymmetry breaking. Assuming that the scalar and pseudoscalar fields decouple at a temperature no later than script O sign(100) MeV, then typically the scale of supersymmetry breaking √F ≳ 60 TeV. This corresponds to a lower bound on the gravitino mass m3/2 ≳ 1 eV.

AB - The effect of spin-0 goldstino superpartners is considered on the nucleosynthesis bounds arising when a superlight gravitino appears as an effective massless neutrino species. When the scalar and pseudoscalar superpartners are relativistic they will decouple at much later times than the goldstino and consequently will be the dominant effect when obtaining a nucleosynthesis bound on the scale of supersymmetry breaking. Assuming that the scalar and pseudoscalar fields decouple at a temperature no later than script O sign(100) MeV, then typically the scale of supersymmetry breaking √F ≳ 60 TeV. This corresponds to a lower bound on the gravitino mass m3/2 ≳ 1 eV.

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U2 - 10.1016/S0370-2693(98)00129-4

DO - 10.1016/S0370-2693(98)00129-4

M3 - Article

AN - SCOPUS:0348246069

VL - 423

SP - 311

EP - 318

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 3-4

ER -