Upper bound on the mass scale of superpartners in minimal N=2 supersymmetry
| dc.creator | Brahmachari, Biswajoy | |
| dc.date | 2005-07-02 | |
| dc.date | 2007-01-03 | |
| dc.date.accessioned | 2026-07-07T07:37:54Z | |
| dc.date.available | 2026-07-07T07:37:54Z | |
| dc.description | If N=2 supersymmetry breaks to N=1 supersymmetry at an intermediate scale $m_2$ and then, later on, N=1 supersymmetry breaks and produces standard model at a scale $m_{susy}$ such that $m_2 > m_{susy}$, renormalization group evolution of three gauge couplings are altered above the scale $m_2$, changing the unification scale and the unified coupling. We show that when we enforce this general condition $m_2 > m_{susy}$ on the solutions of the renormalization group equations, the condition is translated into an upper bound on the scale $m_{susy}$. Using presently favored values of $α_1(m_z),α_2(m_z),α_3(m_z)$, we get $m_{susy} < 4.5 \times 10^9$ GeVs for the central value of $α_3(m_Z)$. When low energy threshold effect is present, this bound gets smeared yet remains generally stable in the $10^9-10^{10}$ GeV range. We also show that if we demand string unification instead of having an unified gauge theory, this constraint can be changed by exotic hypercharge normalizations. | |
| dc.description | Substantially enlarged version. Accepted in Mod. Phys. Lett A | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0507026 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0507026 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/120934 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Upper bound on the mass scale of superpartners in minimal N=2 supersymmetry | |
| dc.type | text |