Electron-electron-photon polarization correlations in high-energy bremsstrahlung

In this paper the analysis of W-boson production process in high-energy electron-photon collisions as a tool to search for deviations from the Standard Model is considered. In particular, a set of extended gauge models, including anomalous multi-boson interactions, are discussed as a promising way for «new physics» study. A numerical analysis of the total cross sections of the processes was carried out. The lowest order radiative corrections in the soft-photon approximation within the Standard Model are taken into account. Calculations beyond the Standard Model was performed, the kinematic features of the cross sections were identified. The restrictions on the anomalous triple gauge boson coupling constants were analyzed and the kinematic areas to the search for their manifestations were obtained during the experiments at the International Linear Collider. The paper shows that the search for «new physics» effects based on electron-photon collisions around the W-boson production peak is the maximal promising. It was also shown that future experiments at high luminosity linear colliders will significantly clarify the constraints on anomalous gauge coupling constants.

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Electron - photon polarization correlation study of the state of Ca atoms excited by electron impact

Journal of Physics B Atomic Molecular and Optical Physics ◽

10.1088/0953-4075/29/23/031 ◽

1996 ◽

Vol 29 (23) ◽

pp. 5919-5926 ◽

Cited By ~ 8

Author(s):

S Chwirot ◽

D Dziczek ◽

R Srivastava ◽

D Dyl ◽

R S Dygdala

Keyword(s):

Electron Impact ◽

Correlation Study ◽

The State ◽

Photon Polarization ◽

Electron Photon ◽

Polarization Correlation

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Physics Opportunities at a Photon–Photon Collider

International Journal of Modern Physics A ◽

10.1142/s0217751x03016343 ◽

2003 ◽

Vol 18 (16) ◽

pp. 2871-2892 ◽

Cited By ~ 9

Author(s):

Stanley J. Brodsky

Keyword(s):

Deeply Virtual Compton Scattering ◽

Virtual Compton Scattering ◽

High Energy ◽

Quadrupole Moments ◽

Spin Asymmetries ◽

Polarized Beams ◽

Single Spin ◽

Single Spin Asymmetries ◽

Photon Collider ◽

Electron Photon

The advent of back-scattered laser beams for e±e-colliders will allow detailed studies of a large array of high energy γγ and γe collision processes with polarized beams. These include tests of electroweak theory in photon-photon annihilation such as γγ → W+W-, γγ → Higgs bosons, and higher-order loop processes, such as γγ → γγ, Zγ, H0Z0and ZZ. Methods for measuring the anomalous magnetic and quadrupole moments of the W and Z gauge bosons to high precision in polarized electron-photon and photon-photon collisions are discussed. Since each photon can be resolved into a W+W-pair, high energy photon-photon collisions can also provide a remarkably background-free laboratory for studying WW collisions and annihilation. I also review high energy γγ and eγ tests of quantum chromodynamics, including the production of two gluon jets in photon-photon collisions, deeply virtual Compton scattering on a photon target, and leading-twist single-spin asymmetries for a photon polarized normal to a production plane. Exclusive hadron production processes in photon-photon collisions provide important tests of QCD at the amplitude level, particularly as measures of hadron distribution amplitudes which are also important for the analysis of exclusive semi-leptonic and two-body hadronic B-decays.

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