Optimizing Photon Collider Through Scattering Laser Wavelength Selection

A -collider to access the 10 TeV parton-center-of-momentum (pCM) energy frontier of particle physics may enable the study of physics phenomena beyond the Standard Model. This collider, based on compact linear wakefield accelerator technology, could be realized through Compton scattering of multi-TeV lepton beams and moderate intensity laser pulses close to the collider interaction point. It is shown that for a large range of scattering laser wavelengths, even for those that cause prolific conversion of high energy photons into electron-positron pairs, -collisions at the interaction point meet the luminosity requirements for novel particle physics studies. This is notable since the electron-positron pair production during the interaction of the scattering laser with the multi-TeV lepton beam leads to a natural limit on the maximum achievable photon luminosity. Moreover, these secondary pairs themselves can be utilized in physics studies since their luminosity is sufficiently high to produce heavy particles at rates needed for discoveries well beyond the reach of existing colliders.

Acknowledgements: This research was supported by LDRD funding from LBNL provided by the Director and the U.S. DOE Office of Science Office of HEP under Contract No. DE-AC02-05CH11231.