Measurement of Γ(η→π+π-γ)/Γ(η→π+π-π0) with the KLOE detector

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Babusci, D. (author)

Measurement of Γ(η→π+π-γ)/Γ(η→π+π-π0) with the KLOE detector

Article/chapterEnglish2013

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Elsevier BV,2013
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LIBRIS-ID:oai:DiVA.org:uu-195007
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-195007URI
https://doi.org/10.1016/j.physletb.2012.11.032DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

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.

Subject headings and genre

η decays
Chiral perturbation theory
E+e- collisions
Light mesons

Added entries (persons, corporate bodies, meetings, titles ...)

Badoni, D. (author)
Balwierz-Pytko, I. (author)
Bencivenni, G. (author)
Bini, C. (author)
Bloise, C. (author)
Bocci, V. (author)
Bossi, F. (author)
Branchini, P. (author)
Budano, A. (author)
Caldeira Balkeståhl, LiUppsala universitet,Kärnfysik(Swepub:uu)liaca435 (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)
Jacewicz, MarekUppsala universitet,Högenergifysik(Swepub:uu)mja03009 (author)
Johansson, TordUppsala universitet,Kärnfysik(Swepub:uu)tordjoha (author)
Kupsc, AndrzejUppsala universitet,Kärnfysik(Swepub:uu)andrkups (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)
Redmer, C. F.Uppsala universitet,Institutionen för fysik och astronomi (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)
Wolke, MagnusUppsala universitet,Kärnfysik(Swepub:uu)mawol031 (author)
Xu, G. (author)
Zdebik, J. (author)
Uppsala universitetKärnfysik (creator_code:org_t)

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In:Physics Letters B: Elsevier BV718:3, s. 910-9140370-26931873-2445

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By the author/editor: Babusci, D.; Badoni, D.; Balwierz-Pytko, ...; Bencivenni, G.; Bini, C.; Bloise, C.; show more...; 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.; show less...

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