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A search for the decay $B^+ \to K^+ \nu \bar{\nu}$
High Energy Physics - Experiment · Submitted 18 Nov 2004
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Using these two independent samples we obtain a combined limit of ${\mathcal B}(B^+ \to K^+ \nu \bar{\nu})<5.2 \times 10^{-5}$ at the 90% confidence level.
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The abstract, sentence by sentence
We search for the rare flavor-changing neutral-current decay $B^+ \to K^+ \nu \bar{\nu}$ in a data sample of 82 fb$^{-1}$ collected with the {\sl BABAR} detector at the PEP-II B-factory. Signal events are selected by examining the properties of the system recoiling against either a reconstructed hadronic or semileptonic charged-B decay. Using these two independent samples we obtain a combined limit of ${\mathcal B}(B^+ \to K^+ \nu \bar{\nu})<5.2 \times 10^{-5}$ at the 90% confidence level. In addition, by selecting for pions rather than kaons, we obtain a limit of ${\mathcal B}(B^+ \to \pi^+ \nu \bar{\nu})<1.0 \times 10^{-4}$ using only the hadronic B reconstruction method.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We search for the rare flavor-changing neutral-current decay $B^+ \to K^+ \nu \bar{\nu}$ in a data sample of 82 fb$^{-1}$ collected with the {\sl BABAR} detector at the PEP-II B-factory. | contribution 0.81 | 0.94 | 0.03 | asserted 0.89 |
| s1 | Signal events are selected by examining the properties of the system recoiling against either a reconstructed hadronic or semileptonic charged-B decay. | method 1.00 | 0.92 | 0.02 | asserted 0.97 |
| s2 | Using these two independent samples we obtain a combined limit of ${\mathcal B}(B^+ \to K^+ \nu \bar{\nu})<5.2 \times 10^{-5}$ at the 90% confidence level. | result 1.00 | 0.97 | 0.89 | asserted 1.00 |
| s3 | In addition, by selecting for pions rather than kaons, we obtain a limit of ${\mathcal B}(B^+ \to \pi^+ \nu \bar{\nu})<1.0 \times 10^{-4}$ using only the hadronic B reconstruction method. | result 0.99 | 0.97 | 0.05 | asserted 1.00 |
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The paper
Original abstract
We search for the rare flavor-changing neutral-current decay $B^+ \to K^+ \nu \bar{\nu}$ in a data sample of 82 fb$^{-1}$ collected with the {\sl BABAR} detector at the PEP-II B-factory. Signal events are selected by examining the properties of the system recoiling against either a reconstructed hadronic or semileptonic charged-B decay. Using these two independent samples we obtain a combined limit of ${\mathcal B}(B^+ \to K^+ \nu \bar{\nu})<5.2 \times 10^{-5}$ at the 90% confidence level. In addition, by selecting for pions rather than kaons, we obtain a limit of ${\mathcal B}(B^+ \to \pi^+ \nu \bar{\nu})<1.0 \times 10^{-4}$ using only the hadronic B reconstruction method.
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References
How the literature uses it
19 arXiv papers cite this in 24 sentences
Papers whose main result relates to this one's
States the same result 1 paper
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Using these two independent samples, a combined limit of ${\mathcal B}(B^+ \to K^+ \nu\bar{\nu})<5.2 \times 10^{-5}$ is obtained at the 90% confidence level.
Papers citing it · 6 sentences without a confident label
Uses its data or values 12 papers
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We use the latest experimental upper limits from Refs. [ref] , which are listed in Eqs. ([ref]-[ref]), to constrain the relevant RPV coupling products.
Studying Exclusive Semi-leptonic $b\to (s,d) \nu \bar{\nu}$ Decays in the MSSM without R-parity · Numerical Results and Discussions · 1.00
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In the present case this signature can be mimicked by the process $$, where we shall now try to estimate the bounds on the unparticles from the experimental constraints on missing energy signatures, as given by the $B$-factories BELLE and BaBar [ref] : Br(B →K νν̅) < 1.4 ×10^-5 , Br(B →K^* νν̅) < 1.4 ×10^-4 .
B \to K(K^*) missing energy in Unparticle physics · Numerical Results and Conclusions · 1.00
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We derive bounds in the general parameter plane of light-vector mass and the appropriate flavor-changing coupling by comparing theoretical predictions for the decay rates to the experimental bounds from various flavor factories, such as NA62 [ref] , BaBar [ref] , CLEO [ref] , Belle II [ref] , BES III [ref] , and TWIST [ref] .
Flavor Phenomenology of Light Dark Vectors · Introduction · 0.83
Compares with it 1 paper
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These results are more restrictive than previous measurements from BaBar [ref] and Belle [ref] .
Leptonic B decays at BaBar · $B^±(0) →K^* ±(0) νν̅$ Analysis · 1.00
Cites it as background 2 papers
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Searches for $$ and $$ have been published by the CLEO [ref] , BABAR [ref] , Belle [ref] , and Belle II [ref] collaborations.
Probing $R$-parity violation in $B$-meson decays to a baryon and a light neutralino · Analysis technique · 0.99
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* $ℬ(B → K^(*) ν ν̅)$: The initial study on $b → s ν ν̅$ channels was done by BaBar [ref] earlier in 2004 where the upper limit of $B^+ → K^+ ν ν̅$ and $B^+ → π^+ ν ν̅$ at 90% CL were reported using only the hadronic reconstruction method.
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