Low Energy Probes of PeV Scale Sfermions

TL;DR

This paper investigates how low energy experiments can set bounds on PeV-scale sfermion masses in mini-split supersymmetry, highlighting the potential of future measurements to probe very heavy superpartners.

Contribution

It provides the first comprehensive analysis of low energy bounds on PeV sfermions in mini-split SUSY, including leading log resummation and projections for future experimental sensitivities.

Findings

Current kaon mixing measurements constrain squark masses to PeV scale.

Future experiments could probe sfermion masses up to 1000 TeV.

EDM and LFV searches are promising for testing models with radiative fermion mass generation.

Abstract

We derive bounds on squark and slepton masses in mini-split supersymmetry scenario using low energy experiments. In this setup gauginos are at the TeV scale, while sfermions are heavier by a loop factor. We cover the most sensitive low energy probes including electric dipole moments (EDMs), meson oscillations and charged lepton flavor violation (LFV) transitions. A leading log resummation of the large logs of gluino to sfermion mass ratio is performed. A sensitivity to PeV squark masses is obtained at present from kaon mixing measurements. A number of observables, including neutron EDMs, mu->e transitions and charmed meson mixing, will start probing sfermion masses in the 100 TeV-1000 TeV range with the projected improvements in the experimental sensitivities. We also discuss the implications of our results for a variety of models that address the flavor hierarchy of quarks and leptons. We find that EDM searches will be a robust probe of models in which fermion masses are generated radiatively, while LFV searches remain sensitive to simple-texture based flavor models.