Discriminating Electroweak-ino Parameter Ordering at the LHC and Its Impact on LFV Studies

Understand

Current limit on the dark matter relic abundance may suggest that $|\mu|$ should be smaller than prediction in the minimal supergravity scenario (mSUGRA) for moderate $m_0$ and $m_{1/2}$.

• The electroweak-ino parameter $M_1, M_2$ and $|\mu|$ are then much closer to each other.
• This can be realized naturally in the non-universal Higgs mass model (NUHM).
• Since the heaviest neutralino ($\tilde\chi^0_4$) and chargino ($\tilde\chi^\pm_2$) have significant gaugino components, they may appear frequently in the left-handed squark decay and then be detectable at the LHC.