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Phys. Rev. D 73, 055010 (2006) [19 pages]

Anomalous gauge couplings of the Higgs boson at high energy photon colliders

Tao Han,1,3,4 Yu-Ping Kuang,2,3 and Bin Zhang3,1
1Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA
2CCAST (World Laboratory), P.O. Box 8730, Beijing 100080, China
3Center for High Energy Physics, Tsinghua University, Beijing 100084, China
4Institute of Theoretical Physics, Academia Sinica, Beijing 100080, China

Received 15 December 2005; published 22 March 2006

We study the sensitivity of testing the anomalous gauge couplings gHVV's of the Higgs boson in the formulation of linearly realized gauge symmetry via the processes gammagamma-->ZZ and gammagamma-->WWWW at polarized and unpolarized photon colliders based on e+e- linear colliders of c.m. energies 500 GeV, 1 TeV, and 3 TeV. Signals beyond the standard model (SM) and SM backgrounds are carefully studied. We propose certain kinematic cuts to suppress the standard model backgrounds. For an integrated luminosity of 1 ab-1, we show that (a) gammagamma-->ZZ can provide a test of gHgammagamma to the 3sigma sensitivity of O(10-3–10-2) TeV-1 at a 500 GeV ILC, and O(10-3) TeV-1 at a 1 TeV ILC and a 3 TeV CLIC, and (b) gammagamma-->WWWW at a 3 TeV CLIC can test all the anomalous couplings gHVV's to the 3sigma sensitivity of O(10-3–10-2) TeV-1.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevD.73.055010
DOI: 10.1103/PhysRevD.73.055010
PACS: 12.60.Fr; 13.88.+e; 14.80.Cp
  • 12.60.Fr
    Extensions of electroweak Higgs sector
  • 13.88.+e
    Polarization in elementary particle interactions and scattering
  • 14.80.Cp
    Non-standard-model Higgs bosons
  • YEAR: 2006

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