Evidence for the singly Cabibbo-suppressed decay $$ {\Omega}_c^0\to {\Xi}^{-}{\pi}^{+} $$ and search for $$ {\Omega}_c^0\to {\Xi}^{-}{K}^{+} $$ and Ω−K+ decays at Belle
نویسندگان
چکیده
Using a data sample of 980 fb$^{-1}$ collected with the Belle detector at KEKB asymmetric-energy $e^+e^-$ collider, we study for first time singly Cabibbo-suppressed decays $\Omega^0_c\to\Xi^{-}\pi^{+}$ and $\Omega^-K^+$ doubly decay $\Omega^0_c\to \Xi^- K^{+}$. Evidence an $\Omega^0_c$ signal in $\Omega^0_c\to\Xi^-\pi^+$ mode is reported significance $4.5\sigma$ including systematic uncertainties. The ratio branching fractions to normalization $\Omega_c^0\to \Omega^-\pi^+$ measured be $${\cal B}(\Omega_{c}^{0} \to \Xi^{-} \pi ^{+} )/{\cal B}(\Omega_c^0\to \Omega^-\pi^+)=0.253\pm 0.053({\rm stat.})\pm 0.030({\rm syst.}).$$ No significant signals $\Omega^0_c\to\Xi^-K^+$ modes are found. upper limits $90\%$ confidence level on ratios determined K ^{+})/{\cal \Omega^-\pi^+) < 0.070$$ \Omega^{-}K^{+})/{\cal 0.29.$$
منابع مشابه
Search for direct CP violation in singly Cabibbo - suppressed D ± K + K - ± decays
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15 صفحه اولSearch for direct CP violation in singly Cabibbo - suppressed D ! K
J. P. Lees, V. Poireau, V. Tisserand, J. Garra Tico, E. Grauges, A. Palano, G. Eigen, B. Stugu, D.N. Brown, L. T. Kerth, Yu. G. Kolomensky, G. Lynch, H. Koch, T. Schroeder, D. J. Asgeirsson, C. Hearty, T. S. Mattison, J. A. McKenna, R. Y. So, A. Khan, V. E. Blinov, A. R. Buzykaev, V. P. Druzhinin, V. B. Golubev, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu. I. Skovpen, E. P. Solodov, ...
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2023
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep01(2023)055