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Evidence for $\pi K$-atoms with DIRAC
We present evidence for the first observation of electromagnetically bound $\pi^\pm K^\mp$-pairs ($\pi K$-atoms) with the DIRAC experiment at the CERN-PS. The $\pi K$-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the $\pi^\pm$ and $K^\mp$-mesons from the atom dissociation ar...
| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
2009
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.physletb.2009.03.001 http://cds.cern.ch/record/1175298 |
| _version_ | 1780916227752853504 |
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| author | Adeva, B. Afanasyev, L. Allkofer, Y. Amsler, Claude Anania, A. Benelli, A. Brekhovskikh, V. Caragheorgheopol, G. Cechak, T. Chiba, M. Chliapnikov, P. Ciocarlan, C. Constantinescu, S. Curceanu, C. Detraz, C. Dreossi, D. Drijard, D. Dudarev, A. Duma, M. Dumitriu, D. Fungueirino, J.L. Gerndt, J. Gorin, A. Gorchakov, O. Gritsay, K. Guaraldo, C. Gugiu, M. Hansroul, M. Hons, Z. Horikawa, S. Iliescu, M. Karpukhin, V. Kluson, J. Kobayashi, M. Komarov, V. Kruglov, V. Kruglova, L. Kulikov, A. Kuptsov, A. Kurochkin, I. Lamberto, A. Lanaro, A. Lapshin, V. Lednicky, R. Levi Sandri, P. Lopez Aguera, A. Lucherini, V. Manuilov, I. Marinas, C. Nemenov, L. Nikitin, M. Okada, K. Olchevsky, V. Pentia, M. Penzo, A. Plo, M. Rappazzo, G.F. Regenfus, Christian Rochet, J. Romero, A. Ronjin, V. Ryazantsev, A. Rykalin, V. Saborido, J. Schacher, J. Sidorov, A. Smolik, J. Sugimoto, S. Takeutchi, F. Tarasov, A. Tauscher, L. Trojek, T. Trusov, Sergey V. Utkin, V. Vazquez Doce, O. Vrba, T. Yazkov, V. Yoshimura, Y. Zhabitsky, M. Zrelov, P. |
| author_facet | Adeva, B. Afanasyev, L. Allkofer, Y. Amsler, Claude Anania, A. Benelli, A. Brekhovskikh, V. Caragheorgheopol, G. Cechak, T. Chiba, M. Chliapnikov, P. Ciocarlan, C. Constantinescu, S. Curceanu, C. Detraz, C. Dreossi, D. Drijard, D. Dudarev, A. Duma, M. Dumitriu, D. Fungueirino, J.L. Gerndt, J. Gorin, A. Gorchakov, O. Gritsay, K. Guaraldo, C. Gugiu, M. Hansroul, M. Hons, Z. Horikawa, S. Iliescu, M. Karpukhin, V. Kluson, J. Kobayashi, M. Komarov, V. Kruglov, V. Kruglova, L. Kulikov, A. Kuptsov, A. Kurochkin, I. Lamberto, A. Lanaro, A. Lapshin, V. Lednicky, R. Levi Sandri, P. Lopez Aguera, A. Lucherini, V. Manuilov, I. Marinas, C. Nemenov, L. Nikitin, M. Okada, K. Olchevsky, V. Pentia, M. Penzo, A. Plo, M. Rappazzo, G.F. Regenfus, Christian Rochet, J. Romero, A. Ronjin, V. Ryazantsev, A. Rykalin, V. Saborido, J. Schacher, J. Sidorov, A. Smolik, J. Sugimoto, S. Takeutchi, F. Tarasov, A. Tauscher, L. Trojek, T. Trusov, Sergey V. Utkin, V. Vazquez Doce, O. Vrba, T. Yazkov, V. Yoshimura, Y. Zhabitsky, M. Zrelov, P. |
| author_sort | Adeva, B. |
| collection | CERN |
| description | We present evidence for the first observation of electromagnetically bound $\pi^\pm K^\mp$-pairs ($\pi K$-atoms) with the DIRAC experiment at the CERN-PS. The $\pi K$-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the $\pi^\pm$ and $K^\mp$-mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173 $\pm$ 54 $\pi K$-atoms. The mean life of $\pi K$-atoms is related to the s-wave $\pi K$-scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level. |
| id | cern-1175298 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2009 |
| record_format | invenio |
| spelling | cern-11752982023-03-12T05:28:07Zdoi:10.1016/j.physletb.2009.03.001http://cds.cern.ch/record/1175298engAdeva, B.Afanasyev, L.Allkofer, Y.Amsler, ClaudeAnania, A.Benelli, A.Brekhovskikh, V.Caragheorgheopol, G.Cechak, T.Chiba, M.Chliapnikov, P.Ciocarlan, C.Constantinescu, S.Curceanu, C.Detraz, C.Dreossi, D.Drijard, D.Dudarev, A.Duma, M.Dumitriu, D.Fungueirino, J.L.Gerndt, J.Gorin, A.Gorchakov, O.Gritsay, K.Guaraldo, C.Gugiu, M.Hansroul, M.Hons, Z.Horikawa, S.Iliescu, M.Karpukhin, V.Kluson, J.Kobayashi, M.Komarov, V.Kruglov, V.Kruglova, L.Kulikov, A.Kuptsov, A.Kurochkin, I.Lamberto, A.Lanaro, A.Lapshin, V.Lednicky, R.Levi Sandri, P.Lopez Aguera, A.Lucherini, V.Manuilov, I.Marinas, C.Nemenov, L.Nikitin, M.Okada, K.Olchevsky, V.Pentia, M.Penzo, A.Plo, M.Rappazzo, G.F.Regenfus, ChristianRochet, J.Romero, A.Ronjin, V.Ryazantsev, A.Rykalin, V.Saborido, J.Schacher, J.Sidorov, A.Smolik, J.Sugimoto, S.Takeutchi, F.Tarasov, A.Tauscher, L.Trojek, T.Trusov, Sergey V.Utkin, V.Vazquez Doce, O.Vrba, T.Yazkov, V.Yoshimura, Y.Zhabitsky, M.Zrelov, P.Evidence for $\pi K$-atoms with DIRACParticle Physics - ExperimentWe present evidence for the first observation of electromagnetically bound $\pi^\pm K^\mp$-pairs ($\pi K$-atoms) with the DIRAC experiment at the CERN-PS. The $\pi K$-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the $\pi^\pm$ and $K^\mp$-mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173 $\pm$ 54 $\pi K$-atoms. The mean life of $\pi K$-atoms is related to the s-wave $\pi K$-scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level.We present evidence for the first observation of electromagnetically bound π±K∓ -pairs ( πK -atoms) with the DIRAC experiment at the CERN-PS. The πK -atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the π± and K∓ -mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173±54 πK -atoms. The mean life of πK -atoms is related to the s -wave πK -scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level.We present evidence for the first observation of electromagnetically bound $\pi^\pm K^\mp$-pairs ($\pi K$-atoms) with the DIRAC experiment at the CERN-PS. The $\pi K$-atoms are produced by the 24 GeV/c proton beam in a thin Pt-target and the $\pi^\pm$ and $K^\mp$-mesons from the atom dissociation are analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173 $\pm$ 54 $\pi K$-atoms. The mean life of $\pi K$-atoms is related to the s-wave $\pi K$-scattering lengths, the measurement of which is the goal of the experiment. From these first data we derive a lower limit for the mean life of 0.8 fs at 90% confidence level.arXiv:0905.0101DIRAC-PUB-2009-01DIRAC-PUB-2009-01oai:cds.cern.ch:11752982009-05-04 |
| spellingShingle | Particle Physics - Experiment Adeva, B. Afanasyev, L. Allkofer, Y. Amsler, Claude Anania, A. Benelli, A. Brekhovskikh, V. Caragheorgheopol, G. Cechak, T. Chiba, M. Chliapnikov, P. Ciocarlan, C. Constantinescu, S. Curceanu, C. Detraz, C. Dreossi, D. Drijard, D. Dudarev, A. Duma, M. Dumitriu, D. Fungueirino, J.L. Gerndt, J. Gorin, A. Gorchakov, O. Gritsay, K. Guaraldo, C. Gugiu, M. Hansroul, M. Hons, Z. Horikawa, S. Iliescu, M. Karpukhin, V. Kluson, J. Kobayashi, M. Komarov, V. Kruglov, V. Kruglova, L. Kulikov, A. Kuptsov, A. Kurochkin, I. Lamberto, A. Lanaro, A. Lapshin, V. Lednicky, R. Levi Sandri, P. Lopez Aguera, A. Lucherini, V. Manuilov, I. Marinas, C. Nemenov, L. Nikitin, M. Okada, K. Olchevsky, V. Pentia, M. Penzo, A. Plo, M. Rappazzo, G.F. Regenfus, Christian Rochet, J. Romero, A. Ronjin, V. Ryazantsev, A. Rykalin, V. Saborido, J. Schacher, J. Sidorov, A. Smolik, J. Sugimoto, S. Takeutchi, F. Tarasov, A. Tauscher, L. Trojek, T. Trusov, Sergey V. Utkin, V. Vazquez Doce, O. Vrba, T. Yazkov, V. Yoshimura, Y. Zhabitsky, M. Zrelov, P. Evidence for $\pi K$-atoms with DIRAC |
| title | Evidence for $\pi K$-atoms with DIRAC |
| title_full | Evidence for $\pi K$-atoms with DIRAC |
| title_fullStr | Evidence for $\pi K$-atoms with DIRAC |
| title_full_unstemmed | Evidence for $\pi K$-atoms with DIRAC |
| title_short | Evidence for $\pi K$-atoms with DIRAC |
| title_sort | evidence for $\pi k$-atoms with dirac |
| topic | Particle Physics - Experiment |
| url | https://dx.doi.org/10.1016/j.physletb.2009.03.001 http://cds.cern.ch/record/1175298 |
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