https://doi.org/10.1140/epjc/s10052-017-4951-1
Regular Article - Theoretical Physics
Uncover compressed supersymmetry via boosted bosons from the heavier stop/sbottom
1
School of Physics, Korea Institute for Advanced Study, Seoul, 130-722, Korea
2
Center for Theoretical Physics of the Universe, Institute for Basic Science (IBS), Daejeon, 34051, Korea
* e-mail: jmli@kias.re.kr
Received:
31
March
2017
Accepted:
28
May
2017
Published online:
5
June
2017
A light stop around the weak scale is a hopeful messenger of natural supersymmetry (SUSY), but it has not shown up at the current stage of LHC. Such a situation raises the question of the fate of natural SUSY. Actually, a relatively light stop can easily be hidden in a compressed spectra such as mild mass degeneracy between stop and neutralino plus top quark. Searching for such a stop at the LHC is a challenge. On the other hand, in terms of the argument of natural SUSY, other members in the stop sector, including a heavier stop 
and lighter sbottom 
(both assumed to be left-handed-like), are also supposed to be relatively light and therefore searching for them would provide an alternative method to probe natural SUSY with a compressed spectra. In this paper we consider quasi-natural SUSY which tolerates relatively heavy colored partners near the TeV scale, with a moderately large mass gap between the heavier members and the lightest stop. Then W / Z / h as companions of and decaying into 
generically are well boosted, and they, along with other visible particles from decay, are a good probe to study compressed SUSY. We find that the resulting search strategy with boosted bosons can have better sensitivity than those utilizing multi-leptons.
© The Author(s), 2017
