Evidence of a new narrow resonance decaying to ${\chi }_{c1}\gamma$ in $B\to {\chi }_{c1}\gamma K$

Belle Collaboration, V. Bhardwaj, K. Miyabayashi +188

We report measurements of $B\to {\chi }_{c1}\gamma K$ and ${\chi }_{c2}\gamma K$ decays using $772\times 10^6$ $B\bar{B}$ events collected at the ${\rm Y}(4S)$ resonance with the Belle detector at the KEK…