| Scientific Committee Paper | |
| Report number | CERN-SPSC-2012-001 ; SPSC-P-284-ADD-6 ; DIRAC-DOC-2012-01 |
| Title | Search for Long-Lived States of $\pi^+\pi^-$ Atoms : Addendum to the DIRAC Proposal |
| Project Manager/Technical Coordinator | Nemenov, Leonid |
| Author(s) |
Adeva, B ; Afanasyev, L ; Anania, A ; Aogaki, S ; Augsten, K ; Batyuk, P ; Benelli, A ; Brekhovskikh, V ; Cechak, T ; Chiba, M ; Ciortea, C ; Curceanu, C ; Doskarova, P ; Dudarev, A ; Dumitriu, D ; Drijard, D ; Fluerasu, D ; Gortchakov, O ; Gritsay, K ; Guaraldo, C ; Gugiu, M ; Hansroul, M ; Hosek, R ; Hons, Z ; Iwashita, Y ; Karpukhin, V ; Kluson, J ; Kobayashi, M ; Kruglov, V ; Kruglova, L ; Kulikov, A ; Kulish, E ; Kuptsov, A ; Lamberto, A ; Lednicky, R ; Martincik, J ; Nemenov, L ; Nikitin, M ; Okada, K ; Pentia, M ; Plo, M ; Prusa, P ; Rappazzo, G ; Ryazantsev, A ; Romero, A ; Ronzhin, V ; Rykalin, V ; Saborido, J ; Schacher, J ; Shlyapnikov, P ; Smolik, J ; Takeutchi, F ; Trojek, T ; Urban, T ; Vrba, T ; Vazquez, P ; Yazkov, V ; Yoshimura, Y ; Zhabitsky, M ; Zrelov, P |
| Corporate author(s) | CERN. Geneva. SPS and PS Experiments Committee ; SPSC |
| Series | (Addendum (Proposal)) |
| Note | PS212 Addendum 6 |
| Submitted by | [email protected] on 04 Jan 2012 |
| Referee | [email protected] on 04 Jan 2012 |
| Subject category | Detectors and Experimental Techniques |
| Accelerator/Facility, Experiment | CERN SPS ; DIRAC PS212 |
| Abstract | The proposed experiment is a further development of the DIRAC experiment already running at CERN PS. The observation of long-lived (metastable) states of $\pi^+\pi^-$ atoms ($A_{2\pi}$) will be performed with the same setup. This observation opens a possibility to measure the energy difference between $ns$ and $np$ states and to determine the value of the combination $2a_0+a_2$ of S-wave $\pi\pi$ scattering lengths in a model-independent way. In combination with the $A_{2\pi}$ lifetime measurement providing the value $|a_0-a_2|$ DIRAC is in the position to get $a_0$ and $a_2$ separately on the basis of $A_{2\pi}$ data only. |
| Copyright/License | Report: © 2012-2024 CERN (License: CC-BY-3.0) |
Email contact(s) : [email protected] ; [email protected]
Záznam vytvorený 2012-01-04, zmenený 2016-06-30
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