Evidence for pi K-atoms with DIRAC

Adeva, B.; Afanasyev, L.; Allkofer, Y.; Amsler, C.; Anania, A.; Benelli, A.; Brekhovskikh, V.; Caragheorgheopol, G.; Čechák, 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, Zdeněk; Horikawa, S.; Iliescu, M.; Karpukhin, V.; Klusoň, J.; Kobayashi, M.; Komarov, V.; Kruglov, V.; Kruglova, L.; Kulikov, A.; Kuptsov, A.; Kurochkin, I.; Lamberto, A.; Lanaro, A.; Lapshin, V.; Lednicky, R.; Sandri, P.L.; Aguera, A.L.; Lucherini, V.; Manuilov, I.; Marinas, C.; Nemenov, L.; Nikitin, M.; Okada, K.; Olchevskii, V.; Pentia, M.; Penzo, A.; Plo, M.; Rappazzo, G.F.; Regenfus, C.; Rochet, J.; Romero, A.; Ronjin, V.; Ryazantsev, A.; Rykalin, V.; Saborido, J.; Schacher, J.; Sidorov, A.; Smolík, J.; Sugimoto, S.; Takeutchi, F.; Tarasov, A.; Tauscher, L.; Trojek, T.; Trusov, S.; Utkin, V.; Vazguez Doce, O.; Vrba, T.; Yazkov, V.; Yoshimura, Y.; Zhabitsky, M.; Zrelov, P.

doi:https://dx.doi.org/10.1016/j.physletb.2009.03.001

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Evidence for pi K-atoms with DIRAC

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SYSNO ASEP	0327367
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Evidence for pi K-atoms with DIRAC
Title	Důkaz pro pi K-atomy na DIRAC
Author(s)	Adeva, B. (ES) Afanasyev, L. (RU) Allkofer, Y. (CH) Amsler, C. (CH) Anania, A. (IT) Benelli, A. (CH) Brekhovskikh, V. (RU) Caragheorgheopol, G. (RO) Čechák, T. (CZ) Chiba, M. (JP) Chliapnikov, P. (RU) Ciocarlan, C. (RO) Constantinescu, S. (RO) Curceanu, C. (IT) Detraz, C. (CH) Dreossi, D. (IT) Drijard, D. (CH) Dudarev, A. (RU) Duma, M. (RO) Dumitriu, D. (RO) Fungueirino, J.L. (ES) Gerndt, J. (CZ) Gorin, A. (RU) Gorchakov, O. (RU) Gritsay, K. (RU) Guaraldo, C. (IT) Gugiu, M. (RO) Hansroul, M. (CH) Hons, Zdeněk (UJF-V)_{RID, ORCID} Horikawa, S. (CH) Iliescu, M. (IT) Karpukhin, V. (RU) Klusoň, J. (CZ) Kobayashi, M. (JP) Komarov, V. (RU) Kruglov, V. (RU) Kruglova, L. (RU) Kulikov, A. (RU) Kuptsov, A. (RU) Kurochkin, I. (RU) Lamberto, A. (IT) Lanaro, A. (IT) Lapshin, V. (RU) Lednicky, R. (CZ) Sandri, P.L. (IT) Aguera, A.L. (ES) Lucherini, V. (IT) Manuilov, I. (RU) Marinas, C. (ES) Nemenov, L. (RU) Nikitin, M. (RU) Okada, K. (JP) Olchevskii, V. (RU) Pentia, M. (RO) Penzo, A. (IT) Plo, M. (ES) Rappazzo, G.F. (IT) Regenfus, C. (CH) Rochet, J. (CH) Romero, A. (ES) Ronjin, V. (RU) Ryazantsev, A. (RU) Rykalin, V. (RU) Saborido, J. (ES) Schacher, J. (CH) Sidorov, A. (RU) Smolík, J. (CZ) Sugimoto, S. (JP) Takeutchi, F. (JP) Tarasov, A. (RU) Tauscher, L. (CH) Trojek, T. (CZ) Trusov, S. (RU) Utkin, V. (RU) Vazguez Doce, O. (ES) Vrba, T. (CZ) Yazkov, V. (RU) Yoshimura, Y. (JP) Zhabitsky, M. (RU) Zrelov, P. (RU)
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 674, č. 1 (2009), s. 11-16
Number of pages	6 s.
Language	eng - English
Country	NL - Netherlands
Keywords	DIRAC experiment ; Exotic atoms ; Scattering length
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
CEZ	AV0Z10480505 - UJF-V (2005-2011)
UT WOS	000265254000003
DOI	10.1016/j.physletb.2009.03.001
Annotation	We present evidence for the first observation of electromagnetically bound pi K-+/-(-/+)-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(+/-) 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 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.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2010

Number of the records: 1