Aug 4 – 8, 2015
America/Detroit timezone

Anatomy of Coannihilation with a Scalar Top Partner

Aug 7, 2015, 4:20 PM
Vandenberg (Michigan League)


Michigan League

BSM Theory BSM Physics


Prof. Aaron Pierce (University of Michigan)


We present a simplified dark matter model where a Majorana fermion χ coannihilates with a colored scalar top partner t˜. We explore the cosmological history, with particular emphasis on the most relevant low-energy parameters: the mass splitting between the dark matter and the coannihilator, and the Yukawa coupling that connects these fields to the Standard Model top quarks. We also allow a free quartic coupling between a pair of Higgs bosons and t˜ pairs. We pay special attention to the case where the values take on those expected where t˜ corresponds to the superpartner of the right-handed top, and χ is a bino. Direct detection, indirect detection, and colliders are complementary probes of this simple model. We will also discuss implications for stop conannihilations within the MSSM.
Oral or Poster Presentation Oral

Primary author

Prof. Aaron Pierce (University of Michigan)


Prof. Alejandro Ibarra (Munich) Dr Nausheen Shah (University of Michigan) Dr Stefan Vogl (Stockholm)

Presentation materials