2009/05/29 by U. Baur
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle Detector Development and Performance #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.80.013012
published as Phys.Rev.D80:013012,2009 · revtex3, 38 pages, 12 figures, 6 tables
arxiv created 2009/05/29 · openalex publication_date 2009/07/28 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Standard model Higgs pair production at e+e^\ensuremath- colliders has the capability to determine the Higgs boson self-coupling \ensuremathλ. I present a detailed analysis of the e+e^\ensuremath-\ensuremath→ZHH and e+e^\ensuremath-\ensuremath→\ensuremathν\ensuremathνHH signal channels, and the relevant background processes, for future e+e^\ensuremath- linear colliders with center of mass energies of √(s)=0.5 TeV, 1 TeV, and 3 TeV. Special attention is given to the role nonresonant Feynman diagrams play, and the theoretical uncertainties of signal and background cross sections. I also derive quantitative sensitivity limits for \ensuremathλ. I find that an e+e^\ensuremath- collider with √(s)=0.5 TeV can place meaningful bounds on \ensuremathλ only if the Higgs boson mass is relatively close to its current lower limit. At an e+e^\ensuremath- collider with √(s)=1 TeV (3 TeV), \ensuremathλ can be determined with a precision of 20%--80% (10%--20%) for integrated luminosities in the few ab^\ensuremath-1 range and Higgs boson masses in the range mH=120--180 GeV.