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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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Synchrotron Radiation Mammography : Clinical Experimentation / Arfelli, Fulvia ; Abrami, Alessandro ; Bregant, Paola ; Chenda, Valentina ; Cova, Maria A ; deGuarrini, Fabio ; Dreossi, Diego ; Longo, Renata ; Menk, Ralf-Hendrik ; Quai, Elisa et al.
2007 - Published in : AIP Conf. Proc.: 879 (2007) , pp. 1895-1898 External link: Published version from AIP
In : 9th International Conference On Synchrotron Radiation Instrumentation, Daegu, Korea, 28 May - 2 Jun 2006, pp.1895-1898

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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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First measurement of the $\pi^+\pi^-$ atom lifetime / DIRAC Collaboration
The goal of the DIRAC experiment at CERN (PS212) is to measure the $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield a precision of 5% on the value of the $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. [...]
hep-ex/0504044; DIRAC-PUB-2005-01.- 2005 - 17 p. - Published in : Phys.Lett.B 619 (2005) 50-60 Fulltext: S0370269305007021 - XML; 1-s2.0-S0370269305007021-main - PDF; arXiv:hep-ex_0504044 - PDF; External link: hep-ex/0504044 PDF

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Detection of $\pi^{+} \pi^{-}$ atoms with the DIRAC spectrometer at CERN / DIRAC Collaboration
The goal of the DIRAC experiment at CERN is to measure with high precision the lifetime of the $\pi^+\pi^-$ atom ($A_{2\pi}$), which is of order $3\times10^{-15}$ s, and thus to determine the s-wave $\pi\pi$-scattering lengths difference $|a_{0}-a_{2}|$. $A_{2\pi}$ atoms are detected through the characteristic features of $\pi^+\pi^-$ pairs from the atom break-up (ionization) in the target. [...]
hep-ex/0409053; DIRAC-PUB-2004-03.- 2004 - 19 p. - Published in : J. Phys. G 30 (2004) 1929-1946 Access to fulltext document: PDF; Fulltext: PDF; External link: hep-ex/0409053 PDF

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The DIRAC experiment at CERN : current status and future perspectives / Rodríguez-Fernández, A M ; Adeva, B ; Afanasev, L G ; Benayoun, M ; Berka, Z ; Brekhovskikh, V ; Garagheorgheopol, G ; Cechák, T ; Chiba, M ; Constantini, S et al.
DIRAC-CONF-2002-02; DIRAC-CONF-2001-01.- 2002 - Published in : $\pi N$ Newsl.: 16 (2002) , pp. 352-354
In : 9th International Symposium on Meson-Nucleon Physics and the Structure of the Nucleon, Washington, DC, USA, 26 - 31 Jul 2001, pp.352-354

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Dirac experiment / DIRAC Collaboration
The main objective of DIRAC experiment is the measurement of the lifetime tau of the exotic hadronic atom consisting of pi /sup +/ and pi /sup -/ mesons. The lifetime of this atom is determined by the decay mode pi /sup +/ pi /sup -/ to pi /sup 0/ pi /sup 0/ due to the strong interaction. [...]
DIRAC-CONF-2000-04.- Geneva : CERN, 2001 - Published in : Nucl. Phys. B, Proc. Suppl. 96 (2001) 259-266
In : 8th International Euroconference on Quantum Chromodynamics, Montpellier, France, 6 - 13 Jul 2000, pp.259-266

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DIRAC : A High Resolution Spectrometer for Pionium Detection / DIRAC Collaboration
The DIRAC spectrometer has been commissioned at CERN with the aim of detecting $\pi^+ \pi^-$ atoms produced by a 24 GeV/$c$ high intensity proton beam in thin foil targets. A challenging apparatus is required to cope with the high interaction rates involved, the triggering of pion pairs with very low relative momentum, and the measurement of the latter with resolution around 0.6 MeV/$c$. [...]
hep-ex/0305022; DIRAC-PUB-2003-01.- Geneva : CERN, 2003 - 49 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 515 (2003) 467-496 Access to fulltext document: PDF; Fulltext: PDF;

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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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Vegeu també: autors amb noms similars
7	Dreossi, D.
1	Dreossi, Diego

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