Collaboration DIRAC

(DImeson Relativistic Atom Complex)

1. to measure the lifetime of   [π⁻π⁺] atoms

   → Pionium

2. to observe   [π⁻K⁺] & [π⁺K⁻] atoms

   → [πK] atom

3. then to measure the [πK] atom lifetime.

→    Latest on DIRAC, follow

• DIRAC physics paper (CERN-EP-2023-276, arXiv:23nn.nnnnn):
  The π(+)π(−) Coulomb interaction study and its use in the data processing.
• DIRAC physics paper (CERN-EP-2022-058, arXiv:2204.01857):
  Investigation of K(+) K(−) pairs in the effective mass region near 2m(K),
  Phys. Rev. D 106, 032006 (2022).
• DIRAC physics paper (CERN-EP-2018-281, arXiv:1811.08659):
  First measurement of a long-lived ππ atom lifetime,
  Phys. Rev. Lett. 122, 082003 (2019).
• DIRAC physics paper (CERN-EP-2017-137, arXiv:1707.02184):
  Measurement of the πK atom lifetime and the πK scattering length,
  Phys. Rev. D 96, 052002 (2017).
• DIRAC physics paper (CERN-(PH)-EP-2016-128, arXiv:1605.06103):
  Observation of πK atoms,
  Phys. Rev. Lett. 117, 112001 (2016) [Editors' highlight].
• DIRAC physics paper (CERN-PH-EP-2015-175, arXiv:1508.04712):
  First observation of long-lived ππ atoms,
  Physics Letters B 751 (2015) 12.
• DIRAC instrumental paper (CERN-PH-EP-2015-147):
  Updated DIRAC spectrometer at CERN PS for the investigation of ππ and πK atoms,
  Nucl. Instr. Meth. A839 (2016) 52.
• DIRAC physics paper (CERN-PH-EP-2014-030, arXiv:1403.0845):
  First πK atom lifetime and πK scattering length measurements,
  Physics Letters B 735 (2014) 288.
• DIRAC in CERN Courier, March 2012, 24-26.
• DIRAC physics paper (CERN-PH-EP-2011-028, arXiv:1109.0569):
  Determination of ππ scattering lengths from measurement of ππ atom lifetime,
  Physics Letters B 704 (2011) 24.
• DIRAC physics paper (arXiv:0905.0101):
  Evidence for πK atoms with DIRAC,
  Physics Letters B 674 (2009) 11.
• DIRAC physics paper (hep-ex/0504044):
  First measurement of the ππ atom lifetime,
  Physics Letters B 619 (2005) 50.
• DIRAC physics paper (hep-ex/0409053):
  Detection of ππ atoms with the DIRAC spectrometer at CERN,
  J. Phys. G: Nucl. Part. Phys. 30 (2004) 1929-1946.
  This paper has been nominated by the Editorial Board of J. Phys. G
  for inclusion in the Research Highlights 2004.
• DIRAC on physicsweb 2004 (Physics World) and in Frankfurter Allgemeine Zeitung (03/11/04)
• Conferences
• Software upgrade :
  • Ariane/detector update (25/07/2014): ArianeUpdating-Info and ArianeUpdating-Files
• Public DIRAC: OUTREACH, CERN-Courier [March 2012]

• Pion-kaon atom
• Why SPS?
• Setup
• Detectors
• Plans

• Introduction 
• Trigger and DAQ system:
1. Trigger logic: DIRAC trigger (status 17.08.2007)
2. DAQ manuals
• Computing and software:
1. DIRAC offline user guide ---->  user guide
2. GEANT-DIRAC simulation -->  user guide
3. Simulated data processing --->  user guide
• Analysis:
1. RUN informations
2. Preselection

• Detector parts 
• Detector characteristics (DIRAC I setup, DIRAC II setup)
• Active image (for advanced browsers only)

• People 
• Mail addresses

• Papers [see also in cds: DIRAC Papers]
• Conference Proceedings [see also in cds: DIRAC Conference Proceedings]
• Notes [see also in cds: DIRAC Notes]
• Reports [see also in cds: DIRAC Reports]
• Theses [see also in cds: DIRAC Theses]
• Preprints
• Talks
• General references of interest for DIRAC

CHECK:
• Private DIRAC

• Meetings (collaboration, executive board, run meetings, technical board)
  
• DIRAC presentations at SPSC, CERN Administration and PAC Dubna (>1999)
  

• EASTB infos

[Update: 11/02/24 JS]