C. Ramírez · wovepaper

activity

20002026

most citedObservation of CP violation in

D^{0} \to K^{-} π^{+}

as a smoking gun for New Physics

13 citations · 26 across the 8 of their papers we have counts for

collaborators

8 papers

CP Violation in $D \to K K$ Decays: A Comparative Analysis of Triplet and Sextet Diquarks

David Delepine, Shaaban Khalil, Carlos A. Ramirez

Recent measurements of the CP asymmetry in the decay $D^{0} \to K_{S}^{0} K_{S}^{0}$ by the CMS collaboration, $A_{C P} (K_{S}^{0} K_{S}^{0}) = (6.2 \pm 3.0 \pm 0.2 \pm 0.8) %$ , and by LHCb, $…

hep-ph2019★ 2 cited

Direct CP violation in $D^{+} \to K^{0} (K ˉ^{0}) π^{+}$ decays as a probe for new physics

David Delepine, Gaber Faisel, Carlos A. Ramirez

In this paper we investigate CP violation in charged decays of $D$ meson. Particularly, we study the direct CP asymmetry of the Cabibbo favored non-leptonic $D^+ \rightarrow \bar K…

hep-ph2018★ 2 cited

Exploring new physics contributions to $C P$ violation in $τ^{-} \to K^{-} π^{0} ν_{τ}$

David Delepine, Gaber Faisel, Carlos A. Ramirez

A general analysis of possible violation of CP in processes like $τ \to K π ν$ , for unpolarized $τ$ is presented. In this paper, we derive the new contributions to the effective Hamil…

hep-ph2017★ 9 cited

CP violation in $D^{0} \to K^{+} π^{-}$

David Delepine, Gaber Faisel, Carlos A. Ramirez

In this paper we study the direct CP asymmetry of the doubly Cabibbo-suppressed decay mode $D^{0} \to K^{+} π^{-}$ within standard model and two Higgs doublet model with generic Yukawa…

New Physics signature in $D^{0} (D ˉ^{0}) \to f$ effective width asymmetries

David Delepine, Gaber Faisel, Carlos A. Ramirez

Violation of charge conjugation-parity ( $CP$ ) symmetry plays a major rule in the dominance of matter in our universe. A kind of $CP$ violation results from the asymmetry of…

New Physics effects in D^+ \rightarrow K^- π^+ π^+

David Delepine, Gaber Faisel, Carlos A. Ramirez

In this paper, we study the Cabibbo favored three body non-leptonic D^+ \rightarrow K^- π^+ π^+ decay. We show that the corresponding direct CP asymmetry is so tiny in the framewor…

hep-ph2012★ 13 cited

Observation of CP violation in $D^{0} \to K^{-} π^{+}$ as a smoking gun for New Physics

David Delepine, Gaber Faisel, Carlos A. Ramirez

In this paper, we study the Cabibbo favored non-leptonic $D^{0}$ decays into $K^{-} π^{+}$ decays. First we show that, within the Standard Model, the corresponding CP asymmetry is strong…

Nonrelativistic Quark Model Calculation of the S parameter

Carlos A. Ramirez

A critical review is presented of the attempts to estimate the Strong Interactions contributions to the parameter $S$ ( $L_{10}$ in the QCD Chiral Version). In particular it is disc…