Z gamma H vertex effects in Higgs production at future e gamma linear colliders

Gabrielli, E.; Ilyin, V.A.; Mele, B.

doi:10.1103/PhysRevD.56.5945

Z gamma H vertex effects in Higgs production at future e gamma linear colliders

Feb, 1997

31 pages

Published in:

Phys.Rev.D 56 (1997) 5945-5961,
Phys.Rev.D 58 (1998) 119902 (erratum)

e-Print:

hep-ph/9702414 [hep-ph]

DOI:

Report number:

ROME1-1165-1997,
NDU-HEP-97-EG01

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Abstract: (arXiv)

One-loop production of a Higgs boson in electro-photon collisions at future accelerators is studied via the process (e gamma -> e H), for intermediate Higgs masses. Exact cross sections, including the possibility of longitudinally polarized initial beams, are presented. Confirming previous estimates made in the Weizs\"acker-Williams approximation, they are found to be more than two orders of magnitude larger than the cross sections for the crossed process (e e-> gamma H), in the energy range

\sqrt{s}=(0.5-2)

TeV. We show that, not only (e gamma -> e H) has a similar potential as the (gamma gamma -> H) process for testing the one-loop gamma-gamma-H vertex, but, by requiring a final electron tagged at large angle in (e gamma -> e H), the (H e) production provides an excellent way of testing the Z-gamma-H vertex, too. Kinematical distributions for the (e gamma -> e H -> e bb) process with a tagged final electron are analyzed, and strategies for controlling the main irreducible background are found. Initial-state-radiation effects are checked to be within a few percent.

Note:

36 pages, 14 figures. Small differences with the published paper corrected

13.88.+e
14.80.Bn
12.15.Lk
photon electron: exclusive reaction
Higgs particle: photoproduction
Higgs particle: mass
photon: polarized beam
electron: polarized beam
polarization: longitudinal
vertex function: (Higgs particle Z0 photon)

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