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Search for the pentaquark candidate $\Theta^+$(1540) in the hyperon beam experiment WA89
High Energy Physics - Experiment · Submitted 5 Oct 2005
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim No evidence for this resonance was found in our data sample which contains 13 millions $K^0_s \to \pi^+\pi^- $ decays above background.
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
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The abstract, sentence by sentence
We report on a high-statistics search for the \t1540 resonance in $\Sigma^-$-nucleus collisions at 340 \gevc1 . No evidence for this resonance was found in our data sample which contains 13 millions $K^0_s \to \pi^+\pi^- $ decays above background. For the decay channel $\Theta^+ \to K^0_s p$ and the kinematic range $x_F>$ 0.05 we find the production cross section to be $BR(\Theta^+ \to K^0_s p)\cdot \sigma_0 <$ 1.8 $\mu$b per nucleon at 99% CL.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We report on a high-statistics search for the \t1540 resonance in $\Sigma^-$-nucleus collisions at 340 \gevc1 . | contribution 0.99 | 0.95 | 0.05 | asserted 0.86 |
| s1 | No evidence for this resonance was found in our data sample which contains 13 millions $K^0_s \to \pi^+\pi^- $ decays above background. | result 1.00 | 0.97 | 0.82 | asserted 1.00 |
| s2 | For the decay channel $\Theta^+ \to K^0_s p$ and the kinematic range $x_F>$ 0.05 we find the production cross section to be $BR(\Theta^+ \to K^0_s p)\cdot \sigma_0 <$ 1.8 $\mu$b per nucleon at 99% CL. | result 1.00 | 0.96 | 0.55 | asserted 0.99 |
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The paper
Original abstract
We report on a high-statistics search for the \t1540 resonance in $\Sigma^-$-nucleus collisions at 340 \gevc1 . No evidence for this resonance was found in our data sample which contains 13 millions $K^0_s \to \pi^+\pi^- $ decays above background. For the decay channel $\Theta^+ \to K^0_s p$ and the kinematic range $x_F>$ 0.05 we find the production cross section to be $BR(\Theta^+ \to K^0_s p)\cdot \sigma_0 <$ 1.8 $\mu$b per nucleon at 99% CL.
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How the literature uses it
2 arXiv papers cite this in 5 sentences
Papers whose main result relates to this one's
States the same result 3 papers
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No evidence for the $\Theta^+$ pentaquark was found.
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It has been found that the pi+ Lambda missing-mass spectrum displays no significant signal expected from the Theta+(1540) excitation.
Investigation of the reaction pp->p K0 pi+ Lambda in search of the pentaquark · 0.92
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We found no evidence for narrow pentaquark peak in any of the studied final states and decay channels.
Papers citing it · 4 sentences without a confident label
Compares with it 1 paper
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The $x_F$ distribution for the relevant mass region $1500 < m(pK^0_S) < 1560$ MeV is very similar to that obtained in the WA89 analysis of the $pK^0_S$ mass spectrum [ref] .
Search for $\Theta^+(1540)$ emission in hadron--nucleus collisions at 400--700 GeV · Introduction · 1.00
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