https://doi.org/10.1140/epjc/s10052-017-5318-3
Regular Article - Theoretical Physics
The MSSM without gluinos; an effective field theory for the stop sector
1
Albert Einstein Center for Fundamental Physics, Institute for Theoretical Physics, University of Bern, 3012, Bern, Switzerland
2
Paul Scherrer Institut (PSI), 5232, Villigen, Switzerland
3
Department of Physics, Tohoku University, Sendai, 980-8578, Japan
* e-mail: aebischer@itp.unibe.ch
Received:
20
June
2017
Accepted:
17
October
2017
Published online:
6
November
2017
In this article we study the MSSM with stops and Higgs scalars much lighter than gluinos and squarks of the first two generations. In this setup, one should use an effective field theory with partial supersymmetry in which the gluino and heavy squarks are integrated out in order to connect SUSY parameters (given at a high scale) to observables in the stop sector. In the construction of this effective theory, valid below the gluino mass scale, we take into account 
and 
effects and calculate the matching as well as the renormalization group evolution. As a result, the running of the parameters for the stop sector is modified with respect to the full MSSM and SUSY relations between parameters are broken. We show that for some couplings sizable numerical differences exist between the effective field theory approach and the naive calculation based on the MSSM running.
© The Author(s), 2017
