1 research outputs found
Precise measurement of at a PLC and theoretical consequences
With the LEP II Higgs search approaching exclusion limits on low values of
it becomes increasingly important to investigate physical
quantities sensitive to large masses of a pseudoscalar Higgs mass. This regime
is difficult and over a large range of impossible to cover at the
LHC proton proton collider. In this paper we focus on the achievable
statistical precision of the Higgs decay into two photons at a future collider (PLC) in the MSSM mass range below 130 GeV. The MSSM and SM
predictions for can differ by up to
10 % even in the decoupling limit of large . We summarize recent progress
in both the theoretical understanding of the background process , , and in the expected detector
performance allow for a high accuracy of the lightest MSSM or SM Higgs boson
decay into a pair. We find that for optimized but still realistic
detector and accelerator assumptions, statistically a 1.4% accuracy is feasible
after about four years of collecting data for a Higgs boson mass which excludes
.Comment: 14 pages, 7 figures, contributed to LP99 at Stanford, C