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1. chinaXiv:201612.00392 [pdf]

Top squark mixing effects in the supersymmetric electroweak corrections to top quark production at the Tevatron

Yang,JM; Li,CS
Subjects:

Taking into account the mixing effects between left- and right-handed top-squarks, we calculate the genuine supersymmetric eletroweak correction to top quark pro- duction at the Tevatron in the minimal supersymmetric model. The analytic ex- pressions of the corrections to both the parton level cross section and the total hadronic cross section are presented. Some numerical examples are also given to show the size of the corrections.

submitted time 2016-12-28 Hits1200Downloads667 Comment 0

2. chinaXiv:201612.00390 [pdf]

One loop QCD corrections to top quark decay into neutralino and light stop

Li,CS; Oakes,RJ; Yang,JM
Subjects:

We calculate the one-loop QCD corrections to t → t ? χ ?0 using dimensional reduction scheme, including QCD and supersymmetric QCD corrections. The analytic expressions for the corrections to the decay width are given, which can easily be extended to t → χ ?+j ?bi. The numerical results show that the correction amounts to more than a 10% reduction in the partial width relative to the tree level result. We also compare the corrections in the no-mixing stop case with those in the mixing stop case.

submitted time 2016-12-28 Hits1225Downloads687 Comment 0

3. chinaXiv:201612.00388 [pdf]

Yukawa corrections to single top quark production at the Fermilab Tevatron in the two Higgs doublet models

Li,CS; Oakes,RJ; Yang,JM
Subjects:

We calculate Yukawa corrections of order αewMt 2/MW 2αewMt 2/MW 2\alpha_{ew} M_t~2/M_W~2 to single top quark production via qq?′→tb?qq?′→tb?q \bar q'\rightarrow t \bar b at the Fermilab Tevatron in the two-Higgs-doublet models. In our calculation we also

submitted time 2016-12-28 Hits1170Downloads669 Comment 0

4. chinaXiv:201612.00387 [pdf]

Supersymmetric electroweak corrections to single top quark production at the Fermilab Tevatron

Li,CS; Oakes,RJ; Yang,JM
Subjects:

We have calculated the O(αewMt 2/MW 2)O(αewMt 2/MW 2)O(\alpha_{ew} M_t~2/M_W~2) supersymmetric electroweak corrections to single top quark production via qq?′→tb?qq?′→tb?q\bar q' \to t\bar b at the Fermilab Tevatron in the minimal supersymmetric model. Th

submitted time 2016-12-28 Hits1238Downloads704 Comment 0

5. chinaXiv:201605.01792 [pdf]

Supersymmetric electroweak corrections to single top quark production at the Fermilab Tevatron

Li, CS; Oakes, RJ; Yang, JM; Zhou, HY
Subjects: Physics >> The Physics of Elementary Particles and Fields

We calculate the O(alpha(cw)M(t)(2)/M-W(2)) supersymmetric (SUSY) electroweak corrections to single top quark production via --> at the Fermilab Tevatron in the minimal supersymmetric model. The supersymmetric electroweak corrections to the cross section are at most a few percent for tan beta > 1, but can exceed 10% for tan beta < 1. The combined effects of SUSY electroweak corrections and the Yukawa corrections can exceed 10% for favorable parameter values, which might be observable at a high-luminosity Tevatron.

submitted time 2016-05-16 Hits1412Downloads718 Comment 0

6. chinaXiv:201605.01791 [pdf]

Yukawa corrections to top quark pair production in photon-photon collisions

Li, CS; Yang, JM; Zhu, YL; Zhou, HY
Subjects: Physics >> The Physics of Elementary Particles and Fields

The O(alpha m(t)(2)/m(w)(2)) Yukawa corrections to top quark pair production in photon-photon collisions ate calculated in the standard model (SM), the general two-Higgs-doublet model (2HDM), as well as the minimal supersymmetric model (MSSM). We found that the correction to the cross section can only reach a few percent in the SM, but can be quite significant (> 10%) in the 2HDM and MSSM for favorable parameter values, which may be observable at high energy e(+)e(-) colliders.

submitted time 2016-05-16 Hits1123Downloads565 Comment 0

7. chinaXiv:201605.01790 [pdf]

One-loop QCD corrections to top quark decay into a neutralino and light stop squark

Li, CS; Oakes, RJ; Yang, JM; Zhou, HY
Subjects: Physics >> The Physics of Elementary Particles and Fields

We calculate the one-loop QCD corrections to t-->(t) over tilde(1)<(chi)over tilde>(0)(j) using the dimensional reduction scheme, including QCD and supersymmetric QCD corrections. The analytic expressions for the corrections to the decay width are given, which can easily be extended to t--><(chi)over tilde>(+)(j)(b) over tilde(i). The numerical results show that the correction amounts to more than a 10% reduction in the partial width relative to the tree level result. We also compare the corrections in the no-mixing top squark case with those in the mixing top squark case.

submitted time 2016-05-16 Hits1309Downloads622 Comment 0

8. chinaXiv:201605.01789 [pdf]

Top quark at the upgraded Tevatron to probe new physics

Datta, A?; Hosch, M; Li, CS; Oakes, RJ; Whisnant, K; Young, BL; Zhang, X
Subjects: Physics >> The Physics of Elementary Particles and Fields

This talk is a review of the recent studies on probing new physics through single top quark processes and probing exotic top quark decays at the upgraded Tevatron.

submitted time 2016-05-16 Hits1126Downloads604 Comment 0

9. chinaXiv:201605.01788 [pdf]

Supersymmetric QCD corrections to single top quark production at the Fermilab tevatron

Li, CS; Oakes, RJ; Yang, JM; Zhou, HY
Subjects: Physics >> The Physics of Elementary Particles and Fields

We evaluate the supersymmetric QCD corrections to single top quark production via q (q) over bar'-->t (b) over bar at the Fermilab Tevatron in the minimal supersymmetric model. We find that within the allowed range of squark and gluino masses the supersymmetric QCD corrections can enhance the cross section by a few percent. The combined effects of SUSY QCD, SUSY EW, and the Yukawa couplings can exceed 10% for the smallest allowed tan beta(similar or equal to 0.25) but are only a few percent for tan beta>1.

submitted time 2016-05-16 Hits1351Downloads652 Comment 0

10. chinaXiv:201605.01785 [pdf]

Supersymmetric electroweak parity nonconservation in top quark pair production at the Fermilab Tevatron

Li, CS; Oakes, RJ; Yang, JM; Yuan, CP
Subjects: Physics >> The Physics of Elementary Particles and Fields

We evaluate the supersymmetric (SUSY) electroweak corrections to the effect of parity nonconservation in --> production at the Fermilab Tevatron predicted by the Minimal Supersymmetric Model (MSSM). We find that the parity nonconserving asymmetry from the SUSY electroweak and SUSY Yukawa loop corrections predicted by the minimal supergravity (mSUGRA) model and the MSSM models with scenarios motivated by current data is about one percent. It will be challenging to observe such a small asymmetry at the Tevatron with 10 fb(-1) of luminosity, It could however be observable if both the top- and bottom-squarks are light and tan beta is smaller than 1, though theses parameters are not favored by mSUGRA. (C) 1997 Elsevier Science B.V.

submitted time 2016-05-16 Hits1023Downloads527 Comment 0

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