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

Adeva, B./ Afanasyev, L./ Benayoun, M./ Benelli, A./ Berka, Z./ Brekhovskikh, V./ Caragheorgheopol, G./ Cechak, T./ Chiba, M./ Chliapnikov, P. V./ Ciocarlan, C./ Constantinescu, S./ Costantini, S./ Curceanu, C./ Doskarova, P./ Dreossi, D./ Drijard, D./ Dudarev, A./ Ferro-Luzzi, M./ Pazos, J. L. F./ Torreira, M. G./ Gerndt, J./ Gianotti, P./ Goldin, D./ Gomez, F./ Gorin, A./ Gorchakov, O./ Guaraldo, C./ Gugiu, M./ Hansroul, M./ Hons, Z./ Hosek, R./ Iliescu, M./ Karpukhin, V./ Kluson, J./ Kobayashi, M./ Kokkas, P./ Komarov, V./ Kruglov, V./ Kruglova, L./ Kulikov, A./ Kuptsov, A./ Kuroda, K. I./ Lamberto, A./ Lanaro, A./ Lapshin, V./ Lednicky, R./ Leruste, P./ Sandri, P. L./ Aguera, A. L./ Lucherini, V./ Maki, T./ Manuilov, I./ Marin, J./ Narjoux, J. L./ Nemenov, L./ Nikitin, M./ Pardo, T. N./ Okada, K./ Olchevskii, V./ Pazos, A./ Pentia, M./ Penzo, A./ Perreau, J. M./ Plo, M./ Ponta, T./ Rappazzo, G. F./ Riazantsev, A./ Rodriguez, J. M./ Fernandez, A. R./ Vidal, A. R./ Ronjin, V. M./ Rykalin, V./ Saborido, J./ Santamarina, C./ Schacher, J./ Schuetz, C./ Sidorov, A./ Smolik, J./ Takeutchi, F./ Tarasov, A./ Tauscher, L./ Tobar, M. J./ Trojek, T./ Trusov, S./ Utkin, V./ Doce, O. V./ Vlachos, S./ Voskresenskaya, O./ Vrba, T./ Willmott, C./ Yazkov, V./ Yoshimura, Y./ Zhabitsky, M./ Zrelov, P.

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.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
Keywords: dirac experiment,elementary atom,pionium atom,pion scattering,cross-sections,pionium,probability,target,qcd
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/16375
ISSN: 0370-2693
Link: <Go to ISI>://000295750500005
http://ac.els-cdn.com/S037026931101046X/1-s2.0-S037026931101046X-main.pdf?_tid=5b745185aa772d91e66aff7aaecb2ee0&acdnat=1334228206_c12ebce4092d9e8b3fc22de97ea0b94f
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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