Počet záznamů: 1

Determination of pi pi scattering lengths from measurement of pi(+)pi(-) atom lifetime

  1. 1.
    0367051 - UJF-V 2012 RIV NL eng J - Článek v odborném periodiku
    Adeva, B. - Afanasyev, L. - Benayoun, M. - Hons, Zdeněk
    Determination of pi pi scattering lengths from measurement of pi(+)pi(-) atom lifetime.
    Physics Letters. B. Roč. 704, 1-2 (2011), s. 24-29 ISSN 0370-2693
    Grant CEP: GA ČR GAP203/10/0310
    Výzkumný záměr: CEZ:AV0Z10480505
    Klíčová slova: DIRAC experiment * Elementary atom * Pionium atom
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
    Impakt faktor: 3.955, rok: 2011

    The DIRAC experiment at CERN has achieved a sizeable production of pi(+)pi(-) 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 pi pi scattering length difference |a(0) - a(2)| = (0.2533(-0.0078)(+0.0080)|stat(-0.0073)(+0.0078)|syst)M(pi+)(-1) has been attained, providing an important test of Chiral Perturbation Theory. (C) 2011 Elsevier B.V. All rights reserved.
    Trvalý link: http://hdl.handle.net/11104/0201839