Analysis of Λ _b → Λl ⁺ l ⁻ rare decays in a non-universal Z′ model

Abstract

Abstract:We investigate the rare baryonic Keywords:boson; Baryonic decays; Flavour-changing neutral currents; Heavy quark effective theory; Models beyond the standard model.

Impact of non-universal $${{Z}}^{{'}}$$ in the lepton flavour violating $${{B}}\left( {{B}}_{{{s}}} \right) {\rightarrow }{{K}}^{{*}}\left( {\varphi } \right) {{l}}_{{{1}}}^{{-}}{{l}}_{{{2}}}^{{+}}$$ decays

“…In our previous work [57], we have studied lepton flavour violating Λ 𝑏 decays and constrained the LFV leptonic couplings from the recent bound of various LFV decays of same quark transition. The LFV quark couplings are taken from refs [39,58] and are recorded in Table-1. The form factor values are taken from Appendix B [42].…”

Imprints of new physics in Λb → Λ∗l+l− decay in nonuniversal Z′ model

“…In fact, LHCb had provided many more fruitful results on not only mesonic decays but also baryonic decays which contain 𝑏 quarks. In recent days, the theoretical inspection of Λ 𝑏 decays has received appreciable attention [19][20][21][22][23][24][25][26][27]. The LHCb searches for pentaquark states in Λ 𝑏 → Λ(→ 𝑝𝐾 − )𝐽/𝜓 which provide information about Λ 𝑏 → Λ(→ 𝑝𝐾 − )𝑙 + 𝑙 − decay [28].…”

“…Due to these characteristics Λ * can be identifiable among the closely lying Λ(1600), Λ(1405) and Λ(1116) (Λ(1116) decays via 𝑁𝜋 pair under weak interaction), all of which owning parity 𝐽 𝑃 = 1 2 ⁄ ± . Previously, Sahoo et al [27] have studied various observables of Λ 𝑏 → Λ𝑙 + 𝑙 − decays in non-universal 𝑍 ′ model. In this model, the NP is allowed to contribute at tree level by 𝑍 ′ -mediated flavour changing 𝑏 → 𝑞(𝑞 = 𝑠, 𝑑) decays where 𝑍 ′ boson couples to the flavour-changing part 𝑞 ̅𝑏 as well as to the leptonic part 𝑙 + 𝑙 − [30][31][32][33][34].…”

Radikalische Umpolung: Effiziente Möglichkeiten zur Synthese von 1,4‐Dicarbonylverbindungen

“…[8] Tr otz dieser Fortschritte ist die Umsetzung von a,b-ungesättigten Aldehyden als Michael-Akzeptoren eine bestehende Herausforderung in der organischen Chemie,u nd die Entwicklung neuer Umpolungsverfahren ist noch immer in hohem Maße wünschenswert. Eine kürzlich entwickelte radikalische Giese-artige Umpolung bietet eine wertvolle Alternative zur Synthese von 1,4-Dicarbonylverbindungen über radikalische Acylintermediate, [9] die die Erzeugung verschiedener Substitutionsmuster ermçglicht (Schema 2).…”