Observation of an enhancement in $e^+\\e^-$ to $\\upsilon_{1S} \\pi^+\\pi^-$, $\\upsilon_{2S} \\pi^+\\pi^-$, and $\\upsilon_{3S} \\pi^+\\pi^-$ production around $\\sqrt{s}=10.89$ GeV at Belle

YEE HSIUNG2018-09-102018-09-102008-08http://inspirehep.net/record/793316http://scholars.lib.ntu.edu.tw/handle/123456789/340206Observation of an enhancement in $e^+\\e^-$ to $\\upsilon_{1S} \\pi^+\\pi^-$, $\\upsilon_{2S} \\pi^+\\pi^-$, and $\\upsilon_{3S} \\pi^+\\pi^-$ production around $\\sqrt{s}=10.89$ GeV at Belleconference paper