A novel unbinned model-independent method to measure the CKM angle $\gamma$ in $B^{\pm} \to DK^{\pm}$ decays with optimised precision
2023
Online
Elektronische Ressource
We present a novel unbinned method to combine $B^{\pm} \to DK^{\pm}$ and charm threshold data for the amplitude-model unbiased measurement of the CKM angle gamma in cases where the D meson decays to a three-body final state. The new unbinned approach avoids any kind of integration over the D Dalitz plot, to make optimal use the available information. We verify the method with simulated signal data where the D decays to $K_S \pi^+ \pi^-$. Using realistic sample sizes, we find that the new method reaches the statistical precision on gamma of an unbinned model-dependent fit, i.e. as good as possible and better than the widely used model-independent binned approach, without suffering from biases induced by a mis-modeled D decay amplitude.
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A novel unbinned model-independent method to measure the CKM angle $\gamma$ in $B^{\pm} \to DK^{\pm}$ decays with optimised precision
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Veröffentlichung: | 2023 |
Medientyp: | Elektronische Ressource |
DOI: | 10.1007.JHEP09(2023)007 |
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