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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Citation Lees, J.P., et al. "Bottomonium spectroscopy and radiative transitions involving the [subuscript bJ](1P,2P) states at BaBar." Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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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