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Measurement of Γ(η→π+π-γ)/Γ(η→π+π-π0) with the KLOE detector
- Babusci, D. (author)
- Badoni, D. (author)
- Balwierz-Pytko, I. (author)
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- Bencivenni, G. (author)
- Bini, C. (author)
- Bloise, C. (author)
- Bocci, V. (author)
- Bossi, F. (author)
- Branchini, P. (author)
- Budano, A. (author)
- Capon, G. (author)
- Ceradini, F. (author)
- Ciambrone, P. (author)
- Czerwiński, E. (author)
- Dané, E. (author)
- De Lucia, E. (author)
- De Robertis, G. (author)
- De Santis, A. (author)
- De Simone, P. (author)
- Di Domenico, A. (author)
- Di Donato, C. (author)
- Di Micco, B. (author)
- Di Salvo, R. (author)
- Domenici, D. (author)
- Erriquez, O. (author)
- Fanizzi, G. (author)
- Fantini, A. (author)
- Felici, G. (author)
- Fiore, S. (author)
- Franzini, P. (author)
- Gauzzi, P. (author)
- Giardina, G. (author)
- Giovannella, S. (author)
- Gonnella, F. (author)
- Graziani, E. (author)
- Happacher, F. (author)
- Höistad, B. (author)
- Iafolla, L. (author)
- Lee-Franzini, J. (author)
- Leverington, B. (author)
- Loddo, F. (author)
- Loffredo, S. (author)
- Mandaglio, G. (author)
- Martemianov, M. (author)
- Martini, M. (author)
- Mascolo, M. (author)
- Messi, R. (author)
- Miscetti, S. (author)
- Morello, G. (author)
- Moricciani, D. (author)
- Moskal, P. (author)
- Nguyen, F. (author)
- Passeri, A. (author)
- Patera, V. (author)
- Prado Longhi, I. (author)
- Ranieri, A. (author)
- Santangelo, P. (author)
- Sarra, I. (author)
- Schioppa, M. (author)
- Sciascia, B. (author)
- Silarski, M. (author)
- Taccini, C. (author)
- Tortora, L. (author)
- Venanzoni, G. (author)
- Versaci, R. (author)
- Wiślicki, W. (author)
- Xu, G. (author)
- Zdebik, J. (author)
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- (creator_code:org_t)
- Elsevier BV, 2013
- 2013
- English.
- In: Physics Letters B. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 718:3, s. 910-914
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- The ratio Rη=Γ(η→π+π-γ)/Γ(η→π+π-π0) has been measured by analysing 22 million φ→ηγ decays collected by the KLOE experiment at DAΦNE, corresponding to an integrated luminosity of 558 pb-1. The η→π+π-γ proceeds both via the ρ resonant contribution, and possibly a non-resonant direct term, connected to the box anomaly. Our result, Rη=0.1856±0.0005stat±0.0028syst, points out a sizable contribution of the direct term to the total width. The di-pion invariant mass for the η→π+π-γ decay could be described in a model-independent approach in terms of a single free parameter, α. The determined value of the parameter α is α=(1.32±0.08stat-0.09syst+0.10±0.02theo) GeV-2.
Keyword
- η decays
- Chiral perturbation theory
- E+e- collisions
- Light mesons
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Physics Letters B (Search for host publication in LIBRIS)
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- By the author/editor
- Babusci, D.
- Badoni, D.
- Balwierz-Pytko, ...
- Bencivenni, G.
- Bini, C.
- Bloise, C.
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- Bocci, V.
- Bossi, F.
- Branchini, P.
- Budano, A.
- Caldeira Balkest ...
- Capon, G.
- Ceradini, F.
- Ciambrone, P.
- Czerwiński, E.
- Dané, E.
- De Lucia, E.
- De Robertis, G.
- De Santis, A.
- De Simone, P.
- Di Domenico, A.
- Di Donato, C.
- Di Micco, B.
- Di Salvo, R.
- Domenici, D.
- Erriquez, O.
- Fanizzi, G.
- Fantini, A.
- Felici, G.
- Fiore, S.
- Franzini, P.
- Gauzzi, P.
- Giardina, G.
- Giovannella, S.
- Gonnella, F.
- Graziani, E.
- Happacher, F.
- Höistad, B.
- Iafolla, L.
- Jacewicz, Marek
- Johansson, Tord
- Kupsc, Andrzej
- Lee-Franzini, J.
- Leverington, B.
- Loddo, F.
- Loffredo, S.
- Mandaglio, G.
- Martemianov, M.
- Martini, M.
- Mascolo, M.
- Messi, R.
- Miscetti, S.
- Morello, G.
- Moricciani, D.
- Moskal, P.
- Nguyen, F.
- Passeri, A.
- Patera, V.
- Prado Longhi, I.
- Ranieri, A.
- Redmer, C. F.
- Santangelo, P.
- Sarra, I.
- Schioppa, M.
- Sciascia, B.
- Silarski, M.
- Taccini, C.
- Tortora, L.
- Venanzoni, G.
- Versaci, R.
- Wiślicki, W.
- Wolke, Magnus
- Xu, G.
- Zdebik, J.
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- Articles in the publication
- Physics Letters ...
- By the university
- Uppsala University
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