Published October 5, 2011
| Version v1
Journal article
Determination of ππ scattering lengths from measurement of π+π- atom lifetime
Creators
- Adeva, B.1
- Afanasyev, L.2
- Benayoun, M.3
- Benelli, A.4
- Berka, Z.5
- Brekhovskikh, V.6
- Caragheorgheopol, G.7
- Cechak, T.5
- Chiba, M.8
- Chliapnikov, P.V.6
- Ciocarlan, C.7
- Constantinescu, S.7
- Costantini, S.9
- Curceanu, C.7
- Doskarova, P.5
- Dreossi, D.10
- Drijard, D.11
- Dudarev, A.2
- Ferro-Luzzi, M.11
- Fungueirino Pazos, J.L.1
- and others
- 1. Santiago de Compostela University (Spain)
- 2. JINR Dubna (Russian Federation)
- 3. LPNHE des Universites Paris VI/VII, IN2P3-CNRS (France)
- 4. Zurich University (Switzerland)
- 5. Czech Technical University in Prague, Prague (Czech Republic)
- 6. IHEP Protvino (Russian Federation)
- 7. IFIN-HH, National Institute for Physics and Nuclear Engineering, Bucharest (Romania)
- 8. Tokyo Metropolitan University (Japan)
- 9. Basel University (Switzerland)
- 10. INFN, Sezione di Trieste and Trieste University, Trieste (Italy)
- 11. CERN, Geneva (Switzerland)
Description
The DIRAC experiment at CERN has achieved a sizeable production of π+π- atoms and has significantly improved the precision on its lifetime determination. From a sample of 21 227 atomic pairs, a 4% measurement of the S-wave ππ scattering length difference |a0-a2|=(0.2533-0.0078+0.0080|stat+0.0078-0.0073|syst)Mπ+-1 has been attained, providing an important test of Chiral Perturbation Theory.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physletb.2011.08.074Additional details
Identifiers
- DOI
- 10.1016/j.physletb.2011.08.074;
- arXiv
- arXiv:1109.0569v2;
- PII
- S0370-2693(11)01046-X;
Publishing Information
- Journal Title
- Physics Letters. Section B
- Journal Volume
- 704
- Journal Issue
- 1-2
- Journal Page Range
- p. 24-29
- ISSN
- 0370-2693
- CODEN
- PYLBAJ
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- Syrian Arab Republic
- INIS RN
- 43073960
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- ACCURACY; ATOMS; CHIRALITY; LIFETIME; PERTURBATION THEORY; PIONIUM; PION-PION INTERACTIONS; PIONS MINUS; PIONS PLUS; S WAVES; SCATTERING
- Descriptors DEC
- BOSONS; ELEMENTARY PARTICLES; HADRON-HADRON INTERACTIONS; HADRONS; INTERACTIONS; MESON-MESON INTERACTIONS; MESONS; PARTIAL WAVES; PARTICLE INTERACTIONS; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS
Optional Information
- Copyright
- Copyright (c) 2011 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.