Probing {ital CP} violation in {gamma}{gamma}{r_arrow}{ital W}{sup +}{ital W}{sup {minus}} with polarized photon beams
- Theory Group, KEK, Tsukuba, Ibaraki 305 (Japan)
- Department of Physics and Center for Theoretical Physics, Seoul National University, Seoul 151-742 (Korea)
We demonstrate in a general framework that polarized photons by backscattered laser beams of adjustable frequencies at a TeV linear {ital e}{sup +}{ital e}{sup {minus}} collider provide us with a very efficient mechanism to probe {ital CP} violation in two-photon collisions. {ital CP} violation in the process {gamma}{gamma}{r_arrow}{ital W}{sup +}{ital W}{sup {minus}} is investigated in detail with linearly polarized photon beams. There are two useful {ital CP}-odd asymmetries that do not require detailed information on {ital W} decay products. The sensitivity to the {ital CP}-odd form factors are studied quantitatively by assuming a perfect {ital e}-{gamma} conversion and the 20 fb{sup {minus}1} {ital e}{sup +}{ital e}{sup {minus}} integrated luminosity at the {ital e}{sup +}{ital e}{sup {minus}} c.m. energies {radical}{ital s}=0.5 and 1.0 TeV. The sensitivity is so high that such experiments will allow us to probe new {ital CP} violation effects beyond the limits from some specific models with reasonable physics assumptions. We find that a counting experiment of {ital W}{sup +}{ital W}{sup {minus}} events in the two-photon mode with adjustable laser frequencies can have much stronger sensitivity to the {ital CP}-odd {gamma}({gamma}){ital WW} form factors than can a {ital W}{sup +}{ital W}{sup {minus}} decay-correlation experiment with a perfect detector achieve in the {ital e}{sup +}{ital e}{sup {minus}} mode. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 397746
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 11 Vol. 54; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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