Phenomenology 2025 Symposium

Dark gauge-mediated supersymmetry breaking

19 May 2025, 15:15

15m

David Lawrence Hall 106, University of Pittsburgh

Electroweak, Higgs, and Top Quark Physics Electroweak

Speaker

Jiheon Lee (KAIST)

Description

We investigate dark gauge-mediated supersymmetry breaking with an unbroken $U(1{)}_D$ symmetry and a massless dark photon. Messengers charged under both Standard Model and dark gauge groups generate new soft SUSY-breaking terms via gauge kinetic mixing. Large mixing significantly alters superpartner spectra compared to standard GMSB, reduces the μ parameter, and predicts a relatively light Higgsino detectable at the LHC. Simple messenger scenarios yield a very light bino-dark photino state observable in exotic Higgs decays at future colliders. The cosmological and phenomenological effects of stable, fractionally charged messenger states are also explored.

Presentation materials

PhenoDarkGMSB.pdf