Aachen 2019 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 40: Flavorphysik I
T 40.7: Vortrag
Dienstag, 26. März 2019, 17:30–17:45, S15
Search for rare B0→ (π0, η, η′) l+l− decays at Belle — •Maryam Salehi and Thomas Kuhr — Ludwig-Maximilians-Universität München,Munich, Germany
The decay B0→ (π0, η, η′) l+l−, (l=e,µ) proceeds through the flavor changing neutral current (FCNC) b→ d l+l−. In the Standard Model (SM), these decays are forbidden at tree level and can only occur in higher orders. Therefore the predicted branching fractions in the SM are of the order of 10−8. The b→ d l+l− transition provides a promising avenue to search for New Physics (NP). Amplitudes from these NP contributions can interfere with those from the SM, and significantly enhance the branching fractions from the SM predictions. I will present a search for rare neutral current decays B0→ (π0, η, η′) l+l−, using a sample of 772 × 106 BB pairs collected with the Belle detector at the e+e− asymmetric collider KEKB.