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Search for the pentaquark candidate $\Theta^+$(1540) in the hyperon beam experiment WA89 (2005) |
- Adamovich, M I,
- Alexandrov, Yu A,
- Baranov, S P,
- Barberis, D,
- Beck, M,
- Bérat, C,
- Beusch, W,
- Boss, M,
- Brons, S,
- Brückner, W,
- Buénerd, M,
- Busch, C,
- Büscher, C,
- Charignon, F,
- Chauvin, J,
- Chudakov, E A,
- Dersch, U,
- Dropmann, F,
- Engelfried, J,
- Faller, F,
- Fournier, A,
- Gerassimov, S G,
- Godbersen, M,
- Grafström, P,
- Haller, T,
- Heidrich, M,
- Hubbard, E,
- Hurst, R B,
- Königsmann, K C,
- Konorov, I,
- Keller, N,
- Martens, K,
- Martin, P,
- Masciocchi, S,
- Michaels, R,
- Müller, U,
- Neeb, H,
- Newbold, D,
- Newsom, C,
- Paul, S,
- Pochodzalla, J,
- Potashnikova, I,
- Povh, B,
- Ransome, R,
- Ren, Z,
- Epherre-Rey-Campagnolle, Marcelle,
- Rosner, G,
- Rossi, L,
- Rudolph, H,
- Scheel, C,
- Schmitt, L,
- Siebert,H W,
- Simon, A,
- Smith, V J,
- Thilmann, O,
- Trombini, A,
- Vesin, E,
- Volkemer, B,
- Vorwalter, K,
- Walcher, T,
- Wälder, G,
- Werding, R,
- Wittmann, E,
- Zavertyaev, M V
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Abstract |
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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 |
Publication details |
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