RT Journal Article
T1 Detection of pi+pi- atoms with the DIRAC spectrometer at CERN
A1 DIRAC Collaboration, 
A1 Adeva Andany, Bernardo
A1 Gómez Rodríguez, Faustino
A1 López Aguera, María de los Ángeles
A1 Pló Casasús, Máximo
A1 Romero Vidal, Antonio
A1 Santamarina Ríos, Cibrán
A1 Saborido Silva, Juan José
A1 Vázquez Regueiro, Pablo
A1 Zrelov, P.
AB The goal of the DIRAC experiment at CERN is to measure with high precision the lifetime of the π+π− atom (A2π), which is of order 3 × 10−15 s, and thus to determine the s-wave ππ-scattering lengths difference |a0 − a2|. A2π atoms are detected through the characteristic features of π+π− pairs from the atom break-up (ionization) in the target. We report on a first high statistics atomic data sample obtained from p–Ni interactions at 24 GeV/c proton momentum and present the methods to separate the signal from the background.
PB IOP Science
SN 0954-3899
YR 2004
FD 2004-11-02
LK https://hdl.handle.net/10347/39312
UL https://hdl.handle.net/10347/39312
LA eng
NO B Adeva et al 2004 J. Phys. G: Nucl. Part. Phys. 30 1929
DS Minerva
RD 28 abr 2026