4 research outputs found
Full one-loop QCD and electroweak corrections to sfermion pair production in collisions
We have calculated the full one-loop electroweak (EW) and QCD corrections to
the third generation scalar-fermion pair production processes at an
electron-positron linear collider(LC) in the minimal supersymmetric standard
model (MSSM). We analyze the dependence of the radiative corrections on the
parameters such as the colliding energy and the SUSY
fundamental parameters , , , and so forth. The
numerical results show that the EW corrections to the squark-, stau-pair
production processes and QCD corrections to the squark-pair production
processes give substantial contributions in some parameter space. The EW
relative corrections to squark-pair production processes can be comparable with
QCD corrections at high energies. Therefore, these EW and QCD corrections
cannot be neglected in precise measurement of sfermion pair productions via
collision at future linear colliders.Comment: to be appeared in Phys. Rev.
The SUSY EW-like corrections to top pair production in photon-photon collisions
We studied the one-loop contributions of the gaugino-Higgsino-sector to the
process of top-pair production via fusion at NLC in frame of
the Minimal Supersymmetric Model(MSSM). We find that the corrections to and are found to
be significant and can approach to a few percent and one percent, respectively.
Furthermore, the dependences of the corrections on the supersymmetric
parameters are also investigated. The corrections are not sensitive to
(or ) when
(or ) and are weakly dependent on the with
(or ) being large enough. But they are sensitive to the c.m.s.
energy of the incoming photons.Comment: LaTex, 33 pages, 8 Eps figuer
Top quark pair production via polarized and unpolarized photons in Supersymmetric QCD
QCD corrections to top quark pair production via fusion of both polarized and
unpolarized photons are calculated in Supersymmetric Model. The corrections are
found to be sizable. The dependence of the corrections on the masses of the
supersymmetric particles is also investigated. Furthermore, we studied CP
asymmetry effects arising from the complex couplings in the MSSM. The CP
violating parameter can reach for favorable parameter values.Comment: 26 pages, LaTex, including 12 figures in 12 eps files. submitted to
Phys. Rev.