We report the results of a search for the , decays. This study is based on a data sample corresponding to an integrated luminosity of , collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider. We investigate the invariant mass distribution in the range 4.0 to using both and decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, and at the 90% confidence level.
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"titles": [
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"source": "APS",
"title": "Search for the <math><mrow><mi>B</mi><mo>\u2192</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mi>K</mi></mrow></math>, <math><mrow><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mo>\u2192</mo><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mrow><mi>\u03c0</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>\u03c0</mi></mrow><mrow><mo>\u2212</mo></mrow></msup></mrow></math> decays"
}
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"value": "10.1103/PhysRevD.99.071102"
}
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"journal_volume": "99",
"journal_title": "Physical Review D",
"material": "other",
"journal_issue": "7",
"year": 2019
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8
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"url": "https://creativecommons.org/licenses/by/4.0/",
"license": "CC-BY-4.0"
}
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"copyright": [
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"statement": "Published by the American Physical Society",
"year": "2019"
}
],
"control_number": "46842",
"collaborations": [
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"value": "Belle Collaboration"
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"hep-ex"
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"abstracts": [
{
"source": "APS",
"value": "We report the results of a search for the <math><mrow><mi>B</mi><mo>\u2192</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mi>K</mi></mrow></math>, <math><mrow><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mo>\u2192</mo><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mrow><mi>\u03c0</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>\u03c0</mi></mrow><mrow><mo>\u2212</mo></mrow></msup></mrow></math> decays. This study is based on a data sample corresponding to an integrated luminosity of <math><mrow><mn>711</mn><mtext> </mtext><mtext> </mtext><msup><mrow><mi>fb</mi></mrow><mrow><mo>\u2212</mo><mn>1</mn></mrow></msup></mrow></math>, collected at the <math><mrow><mi>\u03d2</mi><mo>(</mo><mn>4</mn><mi>S</mi><mo>)</mo></mrow></math> resonance with the Belle detector at the KEKB asymmetric-energy <math><msup><mi>e</mi><mo>+</mo></msup><msup><mi>e</mi><mo>\u2212</mo></msup></math> collider. We investigate the <math><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mi>\u03c0</mi><mo>+</mo></msup><msup><mi>\u03c0</mi><mo>\u2212</mo></msup></math> invariant mass distribution in the range 4.0 to <math><mrow><mn>4.6</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi><mo>/</mo><msup><mi>c</mi><mn>2</mn></msup></mrow></math> using both <math><msup><mi>B</mi><mo>+</mo></msup><mo>\u2192</mo><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mi>\u03c0</mi><mo>+</mo></msup><msup><mi>\u03c0</mi><mo>\u2212</mo></msup><msup><mi>K</mi><mo>+</mo></msup></math> and <math><msup><mi>B</mi><mn>0</mn></msup><mo>\u2192</mo><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mi>\u03c0</mi><mo>+</mo></msup><msup><mi>\u03c0</mi><mo>\u2212</mo></msup><msubsup><mi>K</mi><mi>S</mi><mn>0</mn></msubsup></math> decays. We find excesses of events above the background levels, with significances of 2.1 and 0.9 standard deviations for charged and neutral <math><mi>B</mi><mo>\u2192</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mi>K</mi></math> decays, respectively, taking into account the systematic uncertainties. These correspond to upper limits on the product of branching fractions, <math><mi>B</mi><mo>(</mo><msup><mi>B</mi><mo>+</mo></msup><mo>\u2192</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><msup><mi>K</mi><mo>+</mo></msup><mo>)</mo><mo>\u00d7</mo><mi>B</mi><mo>(</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mo>\u2192</mo><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mi>\u03c0</mi><mo>+</mo></msup><msup><mi>\u03c0</mi><mo>\u2212</mo></msup><mo>)</mo><mo><</mo><mn>1.4</mn><mo>\u00d7</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>5</mn></mrow></msup></math> and <math><mi>B</mi><mo>(</mo><msup><mi>B</mi><mn>0</mn></msup><mo>\u2192</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><msup><mi>K</mi><mn>0</mn></msup><mo>)</mo><mo>\u00d7</mo><mi>B</mi><mo>(</mo><mi>Y</mi><mo>(</mo><mn>4260</mn><mo>)</mo><mo>\u2192</mo><mi>J</mi><mo>/</mo><mi>\u03c8</mi><msup><mi>\u03c0</mi><mo>+</mo></msup><msup><mi>\u03c0</mi><mo>\u2212</mo></msup><mo>)</mo><mo><</mo><mn>1.7</mn><mo>\u00d7</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>5</mn></mrow></msup></math> at the 90% confidence level."
}
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