Exotic to standard bottomonium transitions

نویسندگان

چکیده

We study the transition widths of $\Upsilon(10753)$ and $\Upsilon(11020)$ into standard bottomonium under hypothesis that they correspond to two lowest laying $1^{--}$ hybrid states. employ weakly coupled potential NRQCD an effective filed theory incorporating heavy quark multipole expansions. consider transitions generated by leading order next-to-leading singlet-octet operators. In expansion matrix elements factorize from production light-quark mesons gluonic For operator we compute with a single $\pi^0$, $\eta$ or $\eta'$ in final state for $\pi^+\pi^-$ $K^+K^-$. The hadronization operators is obtained, first case, axial anomaly $\pi^0-\eta-\eta'$ mixing scheme and, second coupled-channel dispersive representation matched chiral perturbation both $S$ $D$ wave pieces operator. compare experimental values semi-inclusive widths. Our results strongly suggest indeed state.

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ژورنال

عنوان ژورنال: Physical review

سال: 2021

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevd.104.034019