The process e+e-→π+π-2π0γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3 fb-1 of data collected around a center-of-mass energy of s=10.58 GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel's contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (gμπ+π-2π0-2)/2=(17.9±0.1stat±0.6syst)×10-10 in the energy range 0.85 GeV<1.8 GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z0-pole is determined as Δαπ+π-2π0(MZ2)=(4.44±0.02stat±0.14syst)×10-4. Furthermore, intermediate resonances are studied and especially the cross section of the process e+e-→ωπ0→π+π-2π0 is measured.

Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2017). Measurement of the e+e-→π+π-π0π0 cross section using initial-state radiation at BABAR. PHYSICAL REVIEW D, 96(9) [10.1103/PhysRevD.96.092009].

Measurement of the e+e-→π+π-π0π0 cross section using initial-state radiation at BABAR

Carpinelli M.
Membro del Collaboration Group
;
2017

Abstract

The process e+e-→π+π-2π0γ is investigated by means of the initial-state radiation technique, where a photon is emitted from the incoming electron or positron. Using 454.3 fb-1 of data collected around a center-of-mass energy of s=10.58 GeV by the BABAR experiment at SLAC, approximately 150000 signal events are obtained. The corresponding nonradiative cross section is measured with a relative uncertainty of 3.6% in the energy region around 1.5 GeV, surpassing all existing measurements in precision. Using this new result, the channel's contribution to the leading order hadronic vacuum polarization contribution to the anomalous magnetic moment of the muon is calculated as (gμπ+π-2π0-2)/2=(17.9±0.1stat±0.6syst)×10-10 in the energy range 0.85 GeV<1.8 GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z0-pole is determined as Δαπ+π-2π0(MZ2)=(4.44±0.02stat±0.14syst)×10-4. Furthermore, intermediate resonances are studied and especially the cross section of the process e+e-→ωπ0→π+π-2π0 is measured.
Articolo in rivista - Articolo scientifico
FINAL-STATES; MONTE-CARLO; DETECTOR; COLLISIONS;
English
Carpinelli Massimo (BABAR Collaboration)
Lees, J., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., et al. (2017). Measurement of the e+e-→π+π-π0π0 cross section using initial-state radiation at BABAR. PHYSICAL REVIEW D, 96(9) [10.1103/PhysRevD.96.092009].
Lees, J; Poireau, V; Tisserand, V; Grauges, E; Palano, A; Eigen, G; Brown, D; Kolomensky, Y; Fritsch, M; Koch, H; Schroeder, T; Hearty, C; Mattison, T; Mckenna, J; So, R; Blinov, V; Buzykaev, A; Druzhinin, V; Golubev, V; Kravchenko, E; Onuchin, A; Serednyakov, S; Skovpen, Y; Solodov, E; Todyshev, K; Lankford, A; Gary, J; Long, O; Eisner, A; Lockman, W; Panduro Vazquez, W; Chao, D; Cheng, C; Echenard, B; Flood, K; Hitlin, D; Kim, J; Miyashita, T; Ongmongkolkul, P; Porter, F; Rohrken, M; Huard, Z; Meadows, B; Pushpawela, B; Sokoloff, M; Sun, L; Smith, J; Wagner, S; Bernard, D; Verderi, M; Bettoni, D; Bozzi, C; Calabrese, R; Cibinetto, G; Fioravanti, E; Garzia, I; Luppi, E; Santoro, V; Calcaterra, A; De Sangro, R; Finocchiaro, G; Martellotti, S; Patteri, P; Peruzzi, I; Piccolo, M; Rotondo, M; Zallo, A; Passaggio, S; Patrignani, C; Lacker, H; Bhuyan, B; Mallik, U; Chen, C; Cochran, J; Prell, S; Ahmed, H; Gritsan, A; Arnaud, N; Davier, M; Le Diberder, F; Lutz, A; Wormser, G; Lange, D; Wright, D; Coleman, J; Gabathuler, E; Hutchcroft, D; Payne, D; Touramanis, C; Bevan, A; Di Lodovico, F; Sacco, R; Cowan, G; Banerjee, S; Brown, D; Davis, C; Denig, A; Gradl, W; Griessinger, K; Hafner, A; Schubert, K; Barlow, R; Lafferty, G; Cenci, R; Jawahery, A; Roberts, D; Cowan, R; Robertson, S; Dey, B; Neri, N; Palombo, F; Cheaib, R; Cremaldi, L; Godang, R; Summers, D; Taras, P; De Nardo, G; Sciacca, C; Raven, G; Jessop, C; Losecco, J; Honscheid, K; Kass, R; Gaz, A; Margoni, M; Posocco, M; Simi, G; Simonetto, F; Stroili, R; Akar, S; Ben-Haim, E; Bomben, M; Bonneaud, G; Calderini, G; Chauveau, J; Marchiori, G; Ocariz, J; Biasini, M; Manoni, E; Rossi, A; Batignani, G; Bettarini, S; Carpinelli, M; Casarosa, G; Chrzaszcz, M; Forti, F; Giorgi, M; Lusiani, A; Oberhof, B; Paoloni, E; Rama, M; Rizzo, G; Walsh, J; Smith, A; Anulli, F; Faccini, R; Ferrarotto, F; Ferroni, F; Pilloni, A; Piredda, G; Bunger, C; Dittrich, S; Grunberg, O; Hess, M; Leddig, T; Voss, C; Waldi, R; Adye, T; Wilson, F; Emery, S; Vasseur, G; Aston, D; Cartaro, C; Convery, M; Dorfan, J; Dunwoodie, W; Ebert, M; Field, R; Fulsom, B; Graham, M; Hast, C; Innes, W; Kim, P; Leith, D; Luitz, S; Macfarlane, D; Muller, D; Neal, H; Ratcliff, B; Roodman, A; Sullivan, M; Va'Vra, J; Wisniewski, W; Purohit, M; Wilson, J; Randle-Conde, A; Sekula, S; Bellis, M; Burchat, P; Puccio, E; Alam, M; Ernst, J; Gorodeisky, R; Guttman, N; Peimer, D; Soffer, A; Spanier, S; Ritchie, J; Schwitters, R; Izen, J; Lou, X; Bianchi, F; De Mori, F; Filippi, A; Gamba, D; Lanceri, L; Vitale, L; Martinez-Vidal, F; Oyanguren, A; Albert, J; Beaulieu, A; Bernlochner, F; King, G; Kowalewski, R; Lueck, T; Nugent, I; Roney, J; Sobie, R; Tasneem, N; Gershon, T; Harrison, P; Latham, T; Prepost, R; Wu, S
File in questo prodotto:
File Dimensione Formato  
1709.01171.pdf

accesso aperto

Descrizione: Article
Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 911.55 kB
Formato Adobe PDF
911.55 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/389139
Citazioni
  • Scopus 34
  • ???jsp.display-item.citation.isi??? 22
Social impact