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- W1963629202 abstract "S-wave and P-wave production cross sections of top quarks in the threshold region are obtained from perturbative QCD in terms of mt, Γt and αS. S-wave production is described in terms of the Green function for the tt̄ system whereas P-wave production depends on the second space derivatives of the tt̄ Green function. We show by explicit calculation that those relativistic corrections that a priori could affect specifically the non-S-wave production are quite insignificant if top decays mainly like t → bW or t → bH with H denoting a charge Higgs state. A comparison of the S-wave and P-wave case thus provides a novel probe of QCD as it affects top dynamics. Collisions of polarized photons off each other allow us to extract separately the S-wave and P-wave production cross section. Such polarized photon beams can be generated by Compton backscattering laser light off polarized electron and positron beams." @default.
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- W1963629202 date "1993-09-01" @default.
- W1963629202 modified "2023-09-26" @default.
- W1963629202 title "Photon linear colliders as Aladdin's lamp - novel probes of QCD in tt̄ physics" @default.
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- W1963629202 doi "https://doi.org/10.1016/0550-3213(93)90158-l" @default.
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