Note on the pseudo-Nambu-Goldstone boson of meta-stable SUSY violation

作者：Banks Tom^*; Haber Howard E

来源：The Journal of High Energy Physics, 2009, 2009(11): 097.

DOI：10.1088/1126-6708/2009/11/097

• Supersymmetric gauge theory
• Supersymmetry Breaking
• Global Symmetries
• Rare Decays

Many models of meta-stable supersymmetry (SUSY) breaking lead to a very light scalar pseudo-Nambu Goldstone boson (PNGB), P, associated with spontaneous breakdown of a baryon number like symmetry in the hidden sector. Current particle physics data provide no useful constraints on the existence of P. For example, the predicted decay rates for K -> pi + P, b -> s + P and and (sic) -> gamma + P are many orders of magnitude below the present experimental bounds. We also consider astrophysical implications of the PNGB and find a significant constraint from its effect on the evolution of red giants. This constraint either rules out models with a hidden sector gauge group larger than SU(4), or requires a new intermediate scale, of order at most 10(10) GeV, at which the hidden sector baryon number is explicitly broken.

• 出版日期2009-11