Pramana | |
Effect of anomalous ð‘¡ð‘𑤠vertex on decay-lepton distributions in ð‘’+ ð‘’-→ toverline{t}$ and CP-violating asymmetries | |
Saurabh D Rindani1  | |
[1] Theory Group, Physical Research Laboratory, Navrangpura, Ahmedabad 380 009, India$$ | |
关键词: Decay of top quark; anomalous couplings; CP-violation.; | |
DOI : | |
学科分类:物理(综合) | |
来源: Indian Academy of Sciences | |
【 摘 要 】
We obtain analytic expressions for the energy and polar-angle double differential distributions of a secondary lepton ð‘™+(ð‘™-) arising from the decay of ð‘¡ ($overline{t}$) in ð‘’+ ð‘’- → $toverline{t}$ with an anomalous ð‘¡ð‘𑤠decay vertex. We also obtain analytic expressions for the various differential cross-sections with the lepton energy integrated over. In this case, we ï¬nd that the angular distributions of the secondary lepton do not depend on the anomalous coupling in the decay, regardless of possible anomalous couplings occurring in the production amplitude for ð‘’+ ð‘’- → $toverline{t}$. Our study includes the effect of longitudinal ð‘’- and ð‘’+ beam polarization. We also study the lepton energy and beam polarization dependence of certain CP-violating lepton angular asymmetries arising from an anomalous ð‘¡ð‘𑤠decay vertex and compare them with the asymmetries arising due to CP-violation in the production process due to the top electric or weak dipole moment.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912040495619ZK.pdf | 289KB | download |