Model dependent analysis of D^(+)_(s)→η^(′)l+v_(l) decays in beyond standard model  

作　　者：S.Mahata M.Mandal H.Mahapatra S.Biswas S.Sahoo 

机构地区：[1]Department of Physics,National Institute of Technology Durgapur Durgapur 713209,West Bengal,India

出　　处：《Chinese Physics C》2024年第9期82-95,共14页中国物理C（英文版）

基　　金：NIT Durgapur for providing fellowship for their research;the Department of Science and Technology, Govt. of India for providing INSPIRE Fellowship through IF 200277。

摘　　要：Motivated by the recent experimental results of branching fractions for D^(+)_(s)→η^(′)l+v_(l) decays,which deviate from their SM predictions,we hve investigated these decays in W' model and scalar leptoquark model to determine potential signatures of new physics(NP) in semileptonic charm decays induced by c→(s,d)l+v_(l) transitions.Using recent experimental results of branching fractions for semileptonic D meson decays,new coupling parameters are predicted for the aforementioned NP models.Branching fraction,forward-backward asymmetry,and lepton polarization asymmetry are examined by considering the predicted NP coupling parameters.The results of branching fractions in scalar leptoquark model are found very close to the experimental results and exist around the range of 1σ deviation.We presented a comparative study of the NP models to check their sensitivity on these decays.We anticipate that further research on these decays will significantly support our findings.

关 键 词：charm decay new physics W′boson scalar leptoquark flavour changing charged current 

分 类 号：O572.33[理学—粒子物理与原子核物理]