SUSY-Yukawa Sum Rule at the LHC

Details SUSY-Yukawa Sum Rule at the LHC SUSY-Yukawa Sum Rule at the LHC

2010-04-29

arxiv.org/abs/1004.5350v2

Phys.Rev.D82:035020,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures (final version accepted for publication in PRD; extended discussion of Upsilon and Upsilon_prime)

Scientific paper

10.1103/PhysRevD.82.035020

We propose the "supersymmetric (SUSY) Yukawa sum rule", a relationship between physical masses and mixing angles of the third-generation quarks and squarks. The sum rule follows directly from a relation between quark and squark couplings to the Higgs, enforced by SUSY. It is exactly this relation that ensures the cancellation of the one-loop quadratic divergence in the Higgs mass from the top sector. Testing the sum rule experimentally would thus provide a powerful consistency check on SUSY as the solution to the gauge hierarchy problem. While such a test will most likely have to await a future next-generation lepton collider, the LHC experiments may be able to make significant progress towards this goal. If some of the terms entering the sum rule are measured at the LHC, the sum rule can be used (within SUSY framework) to put interesting constraints on the other terms, such as the mixing angles among third-generation squarks. We outline how the required mass measurements could be performed, and estimate the accuracy that can be achieved at the LHC.

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