Amplitude Analysis of $B\to KK\pi$ using Run 2 LHCb Data

by Lucas Nicholas Falcão Ferreira (Centro Brasileiro de Pesquisas Físicas)

Thursday 20 Mar 2025, 16:00 → 17:00 Europe/Berlin

CP-03-123 (TU Dortmund)

This study presents the amplitude analysis of the $B^{\pm} \rightarrow K^{\mp} K^{\pm} \pi^{\pm}$ decay using LHCb Run II data. The previous Run I analysis revealed one of the largest single-amplitude CP asymmetries observed, around $-66\%$, highlighting the importance of revisiting this channel with improved statistics and modeling. This work refines the understanding of dominant S-wave contributions, which account for approximately $60\%$ of the decay amplitude, and explores charmonium resonances.

Two models are considered: one incorporating PolarFFNR, and another using $\delta_{\text{Pol2}}$ to introduce a more dynamic representation of the $K\pi$ low-mass region. The baseline model includes resonances such as $K^{*0}(892)$, $K^{*0}(1430)$, $\rho^{0}(1700)$, $\rho^{0}(1450)$, $f_{2}(1270)$, Rescattering, $\phi(1020)$, and $\chi_{c0}$.

announcement.pdf

slides.pdf