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Determination of $\pi\pi$ scattering lengths from measurement of $\pi^+\pi^-$ atom lifetime / PS212 collaboration
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and has significantly improved the precision on its lifetime determination. From a sample of 21227 atomic pairs, a 4% measurement of the S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ has been attained, providing an important test of Chiral Perturbation Theory..
arXiv:1109.0569; CERN-PH-EP-2011-028; FERMILAB-PUB-10-713-E; DIRAC-PUB-2011-01.- Geneva : CERN, 2011 - 6 p. - Published in : Phys. Lett. B 704 (2011) 24-29 Draft (restricted): PDF; Fulltext: PDF; Preprint: PDF; External link: Preprint

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Evidence for $\pi K$-atoms with DIRAC / Adeva, B. (Santiago de Compostela U., IGFAE) ; Afanasyev, L. (Dubna, JINR) ; Allkofer, Y. (Zurich U.) ; Amsler, Claude (Zurich U.) ; Anania, A. (INFN, Messina ; Messina U.) ; Benelli, A. (Zurich U.) ; Brekhovskikh, V. (Serpukhov, IHEP) ; Caragheorgheopol, G. (Bucharest, IFIN-HH) ; Cechak, T. (Prague, Tech. U.) ; Chiba, M. (Tokyo Metropolitan U.) et al.
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. [...]
arXiv:0905.0101; DIRAC-PUB-2009-01; DIRAC-PUB-2009-01.- 2009 - 6 p. - Published in : Phys. Lett. B 674 (2009) 11-16 Fulltext: arXiv:0905.0101 - PDF; 1-s2.0-S0370269309002433-main - PDF; External link: Preprint

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Detection of atoms consisting of $\pi^{+}$ and $\pi^{-}$mesons at PS CERN / DIRAC Collaboration
DIRAC-CONF-2001-02.- 2002 - Published in : AIP Conf. Proc. 619 (2002) 745-748
In : 9th International Conference on Hadron Spectroscopy, Protvino, Russian Federation, 25 Aug - 1 Sep 2001, pp.745-748

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A prototype threshold Cherenkov counter for DIRAC / Bragadireanu, M ; Casano, L ; Cima, E ; Dulach, B ; Gianotti, P ; Guaraldo, C ; Iliescu, M A ; Lanaro, A ; Levi-Sandri, P ; Petrascu, C et al.
We have designed, built and tested a gas threshold Cherenkov counter as prototype for a larger counter foreseen for use in the DIRAC experiment, at CERN. We describe the performances of the counter on a test beam..
DIRAC-PUB-1999-05.- 1999 - Published in : Nucl. Instrum. Methods Phys. Res., A 426 (1999) 254-267

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Lifetime measurement of $\pi^{+}\pi^{-}$ and $\pi^{\pm} K^{\mp}$ atoms to test low energy QCD : Addendum to the DIRAC Proposal / Adeva, B ; Afanasiev, L G ; Berka, Z ; Brekhovskikh, V ; Caragheorgheopol, G ; Cechák, T ; Chiba, M ; Constantinescu, S ; Drijard, Daniel ; Dudarev, A et al.
CERN-SPSC-2004-009 ; SPSC-P-284-ADD-4 ; DIRAC-DOC-2004-01. - 2004. - 155 p.
Fulltext - CERN library copies

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Detection of Atoms Consisting of $pi^{+}$ and $pi^{-}$ Mesons at PS CERN / Adeva, B ; Afanasiev, L G ; Benayoun, M ; Berka, Z ; Brekhovskikh, V ; Caragheorgheopol, G ; Cechák, T ; Chiba, M ; Constantini, S ; Constantinescu, S et al.
2002
In : 9th International Conference on Hadron Spectroscopy, Protvino, Russian Federation, 25 Aug - 1 Sep 2001, pp.745-748

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Differential cross section measurement of $\eta$ photoproduction on the proton from threshold to 1100 MeV / GRAAL Collaboration
The differential cross section for the reaction p(gamma, eta p) has been measured from threshold to 1100 MeV photon laboratory energy. For the first time, the region of the S11(1535) resonance is fully covered in a photoproduction experiment and allows a precise extraction of its parameters at the photon point. [...]
hep-ex/0011098.- 2002 - 5 p. - Published in : Phys. Lett. B 528 (2002) 215-220 Access to fulltext document: PDF; Fulltext: arXiv:hep-ex_0011098 - PDF; S0370269302011966 - XML;

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A BGO crystal ball for intermediate energies / Zucchiatti, A ; Shaerf, C ; Levi-Sandri, P ; Bellini, V ; Garibaldi, F ; Gervino, G ; Anghinolfi, M ; Corvisiero, P ; Ricco, G ; Sanzone, M et al.
1990
In : 4th International Nuclear Physics Conference, v.1: Contributed papers, Sao Paulo, Brasil, 20 - 26 Aug 1989, pp.P6-04

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First observation of $\pi$K atom and its lifetime measurement / Adeva, B (Santiago de Compostela U.) ; Afanasiev, L G (Dubna, JINR) ; Berka, Z (Prague, Tech. U.) ; Brekhovskikh, V (Serpukhov, IHEP) ; Caragheorgheopol, G (Bucharest, IFIN-HH) ; Cechák, T (Prague, Tech. U.) ; Chiba, M (Tokyo Metropolitan U.) ; Costantini, S (Basel U.) ; Constantinescu, S (Bucharest, IFIN-HH) ; Détraz, C (CERN) et al.
CERN-SPSC-2000-032 ; SPSC-P-284-ADD-2 ; DIRAC-NOTE-2000-09 ; DIRAC-DOC-2000-01. - 2000. - 75 p.
Fulltext - Fulltext

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10.

Highlights on the Dirac experiment / Levi-Sandri, P /DIRAC Collaboration
DIRAC-CONF-1999-01.- Geneva : CERN, 1999 - Published in : Frascati Phys. Ser.: 15 (1999) , pp. 151
In : Workshop on Hadron Spectroscopy, Frascati, Italy, 8 - 12 Mar 1999, pp.151-156

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