We search for the tree-diagram dominated process , using a data sample of pairs collected at the resonance with the Belle detector at the KEKB asymmetric-energy collider. This is the first search with the Belle detector for a decay mode including an antineutron. No significant signal is observed and a 90% credible upper limit on the branching fraction is set at .
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{
"raw_name": "M.-Z. Wang",
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{
"raw_name": "I. Adachi",
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{
"raw_name": "K. Adamczyk",
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"full_name": "Adamczyk, K."
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{
"raw_name": "H. Aihara",
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{
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{
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{
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{
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{
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{
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"title": "Study of <math><msup><mi>B</mi><mo>+</mo></msup><mo>\u2192</mo><mi>p</mi><mover><mi>n</mi><mo>\u00af</mo></mover><msup><mi>\u03c0</mi><mn>0</mn></msup></math>"
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"value": "We search for the tree-diagram dominated process <math><msup><mi>B</mi><mo>+</mo></msup><mo>\u2192</mo><mi>p</mi><mover><mi>n</mi><mo>\u00af</mo></mover><msup><mi>\u03c0</mi><mn>0</mn></msup></math>, using a data sample of <math><mn>772</mn><mo>\u00d7</mo><msup><mn>10</mn><mn>6</mn></msup><mi>B</mi><mover><mi>B</mi><mo>\u00af</mo></mover></math> pairs collected at the <math><mi>\u03d2</mi><mo>(</mo><mn>4</mn><mi>S</mi><mo>)</mo></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. This is the first search with the Belle detector for a decay mode including an antineutron. No significant signal is observed and a 90% credible upper limit on the branching fraction is set at <math><mn>6.3</mn><mo>\u00d7</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>6</mn></mrow></msup></math>."
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