Low energy QCD and ChPT studies with KLOE

Ambrosino, F. and Antonelli, A. and Antonelli, M. and Archilli, F. and Beltrame, P. and Bencivenni, G. and Bini, C. and Bloise, C. and Bocchetta, S. and Bossi, F. and Branchini, P. and Capon, G. and Capussela, T. and Ceradini, F. and Ciambrone, P. and De Lucia, E. and De Santis, A. and De Simone, P. and De Zorzi, G. and Denig, A. and Di Domenico, A. and Di Donato, C. and Di Micco, B. and Dreucci, M. and Felici, G. and Fiore, S. and Franzini, P. and Gatti, C. and Gauzzi, P. and Giovannella, S. and Graziani, E. and Jacewicz, Marek and Lanfranchi, G. and Lee-Franzini, J. and Martini, M. and Massarotti, P. and Meola, S. and Miscetti, S. and Moulson, M. and Müller, S. and Murtas, F. and Napolitano, M. and Nguyen, F. and Palutan, M. and Passeri, A. and Patera, V. and Santangelo, P. and Sciascia, B. and Spadaro, T. and Tortora, L. and Valente, P. and Venanzoni, G. and Versaci, R. and Xu, G. (2010) Low energy QCD and ChPT studies with KLOE. Il nuovo cimento C, 33 (5). pp. 149-157. ISSN 1826-9885

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The KLOE experiment is situated at the φ factory DAΦNE in Frascati. φ radiative decays have been used to investigate the properties of the light scalar mesons f0(980)/a0(980), whose structure is still controversial. Off-peak data allow to investigate γγ interaction with a consequent scalar/pseudoscalar meson production. From the large sample of the η and η' produced in φ → ηγ decay we have studied several η and η' decays relevant to η/η' mixing, η' gluonium content, CP violation searches and tests of ChPT. For the hadronic cross section, the pion form factor in the Mππ invariant mass range (0.592–0.975) GeV has been determined and used in the evaluation of the hadronic contribution to the muon anomaly. The result confirms the 3-σ discrepancy between SM expectation and the measurement of the muon (g − 2) by the E821 experiment at the BNL.

Item Type: Article
Uncontrolled Keywords: Decays of other mesons ; Hadron production in e−e+ interactions ; Light mesons (S = C = B = 0)
Subjects: 500 Scienze naturali e Matematica > 530 Fisica
Depositing User: Marina Spanti
Date Deposited: 02 Apr 2020 14:49
Last Modified: 02 Apr 2020 14:49
URI: http://eprints.bice.rm.cnr.it/id/eprint/17047

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