[The University of Texas at Austin: What starts here changes the world]
Theory Group
Theory Group Seminar , 23 February 2016


Peter Graham

Dynamical Relaxation for Fine-Tuning Problems and Precision Measurement

abstract

A new class of solutions to the electroweak hierarchy problem is presented that does not require either weak scale dynamics or anthropics. Dynamical evolution during the early universe drives the Higgs mass to a value much smaller than the cutoff. The simplest model has the particle content of the standard model plus a QCD axion & an inflation sector. The highest cutoff achieved in any technically natural model is 108 GeV. This provides further motivation for precision measurement as a powerful new approach for particle physics. Sensitive technologies enable novel experiments for direct detection of dark matter and gravitational waves. Thus, precision measurement opens new avenues for probing the origin and composition of the universe.




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