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CERN Accelerating science

DIRAC Papers

Letzte Einträge:
2011-08-31
17:26
Breakup of relativistic pi+pi- atoms in matter / Afanasyev, L G (Dubna, JINR) ; Tarasov, A V (Dubna, JINR)
DIRAC-PUB-1996-02.- 1996 - Published in : Phys. At. Nucl. 59 (1996) 2130

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2011-08-31
17:23
Study of pionium - a bound state of $\pi+\pi-$ mesons - a unique source of information of properties of the meson strong interaction / Bednar, M ; Lednicky, R
DIRAC-PUB-1996-03.- 1996 - Published in : Czech. J. Phys.: 46 (1996) , pp. 241

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2011-08-31
17:20
Total interaction cross sections of relativistic pi+pi- atoms with ordinary atoms in the eikonal approach / Afanasyev, L G (Dubna, JINR) ; Tarasov, A (Dubna, JINR) ; Voskresenskaya, O (Dubna, JINR)
DIRAC-PUB-1999-03.- 1999 - Published in : J. Phys. G 25 (1999) B7

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2011-08-31
17:08
A novel aerogel Cherenkov detector for DIRAC-II / Allkofer, Y (Zurich U.) ; Amsler, C (Zurich U.) ; Horikawa, S (Zurich U.) ; Johnson, I (Zurich U.) ; Regenfus, C (Zurich U.) ; Rochet, J (Zurich U.)
DIRAC-PUB-2007-01.- 2007 - Published in : Nucl. Instrum. Methods Phys. Res., A 582 (2007) 497

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2011-08-31
17:05
Finite-size effect on two-particle production / Lednický, R (Dubna, JINR)
DIRAC-PUB-2008-02.- 2008 - Published in : J. Phys. G 35 (2008) 125109

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2011-08-31
16:59
Preshower detector for π+π− hadronic atom studies / Pentia, M (Bucharest, IFIN-HH) ; Ciocarlan, C (Bucharest, IFIN-HH) ; Constantinescu, S (Bucharest, IFIN-HH) ; Gugiu, M (Bucharest, IFIN-HH) ; Caragheorgheopol, Gh (Bucharest, IFIN-HH)
DIRAC-PUB-2009-02.- 2009 - Published in : Nucl. Instrum. Methods Phys. Res., A 603 (2009) 309

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2011-08-31
16:55
Finite-size correction to the pionium lifetime due to ω and η' contributions / Chliapnikov, P V (Serpukhov, IHEP) ; Ronjin, V M (Serpukhov, IHEP)
DIRAC-PUB-2009-03.- 2009 - Published in : J. Phys. G 36 (2009) 105004

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2011-08-31
14:13
DIRAC experiment at CERN: Observation and lifetime measurement of dimeson atoms / Schacher, J (Bern U. ; CERN) /on behalf of the DIRAC collaboration
DIRAC-PUB-2010-01.- 2010 - Published in : SPG Mitteilungen: 30 (2010) , pp. 6-7
In : 2010 Annual Meeting of the Swiss Physical Society, Basel, Switzerland, 21 - 22 Jun 2010, pp.6-7

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2011-02-28
17:12
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..
CERN-PH-EP-2011-028; FERMILAB-PUB-10-713-E; arXiv:1109.0569; DIRAC-PUB-2011-01.- Geneva : CERN, 2011 - 6 p. - Published in : Phys. Lett. B 704 (2011) 24-29 CERN-PH-EP-2011-028: PDF; Draft (restricted): PDF; Preprint: PDF; External link: Preprint

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2009-05-04
16:48
Evidence for $\pi K$-atoms with DIRAC / Adeva, B (Santiago de Compostela U., IGFAE) ; Afanasyev, L (Dubna, JINR) ; Allkofer, Y (Zurich U.) ; Amsler, C (Zurich U.) ; Anania, A (INFN, Messina) ; Benelli, A (Zurich U.) ; Brekhovskikh, V (Serpukhov, IHEP) ; Caragheorgheopol, G (Bucharest, IFIN-HH) ; Cechak, T (Andes U., Bogota) ; 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.- 2009 - Published in : Phys. Lett. B 674 (2009) 11-16 External link: Preprint

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