Bounds on the non-standard W+W-γ couplings at the LHeC and the FCC-he

We examine the potential of the e(-)p -> e(-)gamma* p -> e(-)W(-) q' X(gamma* is the Weizsacker-Williams photon) reaction to probe the non-standard W+W-gamma couplings at the Large Hadron electron Collider (LHeC) and the Future Circular Collider-hadron electron (FCC-he). Using the effective Lagrangian approach with various values of the center-of-mass energy and integrated luminosity, we find 95% confidence level bounds on the anomalous coupling Delta kappa gamma and lambda gamma parameters. We assume center-of-mass energies of the electron-proton system root s = 1.30, 1.98, 7.07, 10 TeV and luminosities L = 10 - 1000 fb(-1). The best limits obtained from the process e(-)p -> e(-)gamma* p -> e(-)W(-) q'X on the anomalous Delta kappa gamma and lambda gamma couplings are Delta kappa gamma = vertical bar 0.00069 vertical bar and lambda gamma = [-0.0099, 0.0054]. These bounds show that the process under consideration is a very promising option to probe the non-standard Delta kappa gamma and lambda gamma couplings at the LHeC and the FCC-he. Our results also provide complementary information on other results for Delta kappa gamma and lambda gamma couplings. (C) 2020 The Author(s). Published by Elsevier B.V.