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DIRAC Papers

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2015-06-10
21:18
Updated DIRAC spectrometer at CERN PS for the investigation of ππ and πK atoms / PS212 collaboration
The DIRAC spectrometer installed at CERN PS was redesigned and upgraded in order to study simultaneously Aππ and AπK atoms, namely the bound states of π+π–, and π+K–, π–K+ mesons. The detector system which is able to accept a high intensity beam such as 2 - 6 × 1011 primary protons per second, the electronics and the data-acquisition system adapted to handle very large amount of data actually allowed to identify successfully π, K, p, e and µ and to give the possibility to select π-π and π-K pairs in the off-line analysis. [...]
CERN-PH-EP-2015-147; DIRAC-PUB-2016-03.- Geneva : CERN, 2016 - 34 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 839 (2016) 52-85 Draft (restricted): PDF; Fulltext: PDF;

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2014-07-03
21:52
DIRAC observes dimeson atoms and measures their lifetime
Published in: CERN Courier Volume 52, Number 2, March 2012
Geneva : CERN, 2012

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2011-09-06
09:54
The C4F10 Cherenkov detector for DIRAC-II / Horikawa, S (Zurich U.) ; Allkofer, Y (Zurich U.) ; Amsler, C (Zurich U.) ; Brekhovskikh, V (Serpukhov, IHEP) ; Kuptsov, A (Dubna, JINR) ; Pentia, M (Bucharest, IFIN-HH) ; Ullaland, O (CERN) ; Zhabitsky, M (Dubna, JINR) /on behalf of the DIRAC collaboration
DIRAC-CONF-2007-04; DIRAC-PUB-2008-04.- 2008 - Published in : Nucl. Instrum. Methods Phys. Res., A 595 (2008) 212-215
In : 6th International Workshop on Ring Imaging Cherenkov Counters, Trieste, Italy, 15 - 20 Oct 2007, pp.212-215

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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.)
We present a new threshold Cherenkov detector using silica aerogel radiators with wavelength shifter. A duplex design was chosen to discriminate between kaons and protons in the momentum range 4–8 GeV/c for the DIRAC-II experiment at CERN. [...]
DIRAC-PUB-2007-01.- 2007 - 12 p. - 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)
The formalism allowing one to account for the effect of a finite spacetime extent of a particle production region is given. Its applications to the lifetime measurement of hadronic atoms produced by a high-energy beam in a thin target, as well as to the femtoscopy techniques widely used to measure spacetime characteristics of the production processes, are discussed. [...]
DIRAC-PUB-2008-02.- 2008 - 28 p. - 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)
A preshower (PSh) detector has been prepared, tested and used at the CERN-DIRAC experiment [B. Adeva, et al., DIRAC proposal, CERN/SPSLC 95-1, SPSLC/P 284, 1995]. [...]
DIRAC-PUB-2009-02.- 2009 - 10 p. - 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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