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CERN Document Server 16 registres trobats  1 - 10següent  anar al registre: La cerca s'ha fet en 0.61 segons. 
1.
Search for Long-Lived States of $\pi^+\pi^-$ Atoms : Addendum to the DIRAC Proposal / DIRAC Collaboration
The proposed experiment is a further development of the DIRAC experiment already running at CERN PS. [...]
CERN-SPSC-2012-001 ; SPSC-P-284-ADD-6 ; DIRAC-DOC-2012-01.
- 2012.
Original Document (SPSC-P-284-ADD-5) - SPSC-P-284-ADD-6
2.
Magnetic measurement report / Gallas, M ; Gorchakov, O ; Hosek, R ; Kuptsov, A ; L.Nemenov, ; Raimondo, A ; Yazkov, V ; Zrelov, P
DIRAC-NOTE-1998-06.
- 1998.
3.
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
4.
Search for Long-Lived States of $\pi^+\pi^-$ Atoms : Addendum to the DIRAC Proposal / DIRAC Collaboration
The proposed experiment is a further development of the DIRAC experiment already running at CERN PS. [...]
CERN-SPSC-2011-001 ; SPSC-P-284-ADD-5 ; DIRAC-DOC-2011-01.
- 2011. - 24 p.
Full text
5.
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
6.
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
7.
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
8.
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
9.
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
10.
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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