DETERMINATION OF THE PI(+ -)P-]PI(+/-)PI(+)N CROSS-SECTION NEAR-THRESHOLD/

Authors
LANGE JB DUNCAN F AMBARDAR A FELTHAM A HOFMAN G JOHNSON RR JONES G PAVAN M RAYWOOD KJ VETTERLI D BRACK JT OTTEWELL D SMITH GR SEVIOR ME
Citation
Jb. Lange et al., DETERMINATION OF THE PI(+ -)P-]PI(+/-)PI(+)N CROSS-SECTION NEAR-THRESHOLD/, Physical review letters, 80(8), 1998, pp. 1597-1600
Citations number
23
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
80
Issue
8
Year of publication
1998
Pages
1597 - 1600
Database
ISI
SICI code
0031-9007(1998)80:8<1597:DOTP-C>2.0.ZU;2-B
Abstract
The total cross section for the pi(-) p --> pi(-)pi(+) n reaction has been measured at incident pion kinetic energies of 200, 190, 184, and 180 MeV. In addition, the pi(+) p --> pi(+) pi(+) n reaction was measu red at 200 and 184 MeV. A fit of the cross sections by heavy baryon ch iral perturbation theory yields values of 8.5 +/- 0.6(m(pi)(-3)) and 2 .5 +/- 0.1(m(pi)(-3)) for the reaction matrix elements A(10) and A(32) , which correspond to values for the s-wave isospin-0 and isospin-2 pi -pi scattering lengths of a(0) = 0.23 +/- 0.08(m(pi)(-1)) and a(2) = - 0.031 +/- 0.008(m(pi)(-1)), respectively.