Rare decays of the top quark in the minimal supersymmetric model

Since the top quark FCNC processes are extremely supressed in the Standard Model (SM) but could be greatly enhanced in some new physics models, they could serve as a smoking gun for new physics hunting at the LHC. In this brief review we summarize the new physics predictions for various top quark FCNC processes at the LHC by focusing on two typical models: the minimal supersymmetric model (MSSM) and the topcolor-assisted technicolor (TC2) model. The conclusion is: (1) Both new physics models can greatly enhance the SM predictions by several orders; (2) The TC2 model allows for largest enhancement, and for each channel the maximal prediction is much larger than in the MSSM; (3) Compared with the 3σ sensitivity at the LHC, only a couple of channels are accessible for the MSSM while most channles are accesible for the TC2 model.

Download Full-text

Erratum: Top quark rare decayt→cHiin the minimal supersymmetric model

Physical Review D ◽

10.1103/physrevd.51.3974 ◽

1995 ◽

Vol 51 (7) ◽

pp. 3974-3974 ◽

Cited By ~ 14

Author(s):

Jin Min Yang ◽

Chong Sheng Li

Keyword(s):

Top Quark ◽

Supersymmetric Model ◽

Minimal Supersymmetric Model

Download Full-text

Top decay in the minimal supersymmetric model

Physics Letters B ◽

10.1016/0370-2693(92)90726-k ◽

1992 ◽

Vol 278 (1-2) ◽

pp. 155-161 ◽

Cited By ~ 8

Author(s):

Keisho Hidaka ◽

Yoshiki Kizukuri ◽

Tadashi Kon

Keyword(s):

Supersymmetric Model ◽

Minimal Supersymmetric Model

Download Full-text

Study of Rare Mesonic Decays Involving Di-Neutrinos in Their Final State

Advances in High Energy Physics ◽

10.1155/2018/4176840 ◽

2018 ◽

Vol 2018 ◽

pp. 1-20

Author(s):

Azeem Mir ◽

Farida Tahir ◽

Shakeel Mahmood ◽

Shi- Hai Dong

Keyword(s):

Branching Fractions ◽

New Physics ◽

Supersymmetric Model ◽

Final State ◽

Yukawa Couplings ◽

Leptonic Decays ◽

Pseudoscalar Mesons ◽

Theoretical Predictions ◽

Minimal Supersymmetric Model

We have studied phenomenological implication of R-parity violating (Rp) Minimal Supersymmetric Model (MSSM) via analyses of pure leptonic (M→νν¯) and semileptonic decays of pseudoscalar mesons (M→Xνν¯). These analyses involve comparison between theoretical predictions made by Rp MSSM and the Standard Model (SM) with the experimental results like branching fractions (Br) of the said process. We have found, in general, that Rp contribution dominates over the SM contribution, i.e., by a factor of 10 for the pure leptonic decays of KL,S and by 102 and 104 in case of Bs and Bd, respectively. Furthermore, the limits obtained on Rp Yukawa couplings (λαkβ′λαkγ′⁎) by using Br (M→Xνν¯) are used to calculate Br (M→νν¯). This demonstrates the role of Rp MSSM as a viable model for the study of new physics contribution in rare decays at places like Super B factories, KOTO (J-PARC) and NA62 at CERN.

Download Full-text