NLO NRQCD disfavors the interpretation of X(3872) as ${\chi }_{c1}(2P)$

Mathias Butenschoen, Zhi-Guo He, Bernd A. Kniehl

We study ${\chi }_{c1}(2P)$ inclusive hadroproduction at next-to-leading order (NLO), both in ${\alpha }_s$ and $v^2$, within the factorization formalism of nonrelativistic quantum chromodynamic…