Time-dependent analysis of $B^0 \to {{K^0_{S}}} \pi^- \pi^+ \gamma$ decays and studies of the $K^+\pi^-\pi^+$ system in $B^+ \to K^+ \pi^- \pi^+ \gamma$ decays

• Published in: Physical review. D 2016-03, Vol.93
• Main Authors: del Amo Sanchez, P., Lees, J. P., Poireau, V., Tisserand, V., Arnaud, N., Davier, M., Derkach, D., Grosdidier, G., Le Diberder, F., Lutz, A. M., Malaescu, B., Roudeau, P., Stocchi, A., Wormser, G.
• Format: Article
• Language: English
• Subjects: High Energy Physics - Experiment; Physics
• ISSN: 2470-0010; 2470-0029
• DOI: 10.1103/PhysRevD.93.052013

We measure the time-dependent $CP$ asymmetry in the radiative-penguin decay $B^0 \to {{K^0_{S}}} \pi^- \pi^+ \gamma$, using a sample of $471$ million $\Upsilon(4S) \to B{\kern 0.18em\overline{\kern -0.18em B}}$ events recorded with the BaBar detector at the PEP-II $e^+e^-$ storage ring at SLAC. Using events with $m_{K\pi\pi}