Measurement of the e(+)e(-) -> pi(+)pi(-)pi(0)pi(0) cross section using initial-state radiation at BABAR

Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Brown, D. N.; Kolomensky, Yu. G.; Fritsch, M.; Koch, H.; Schroeder, T.; Hearty, C.; Mattison, T. S.; Mckenna, J. A.; R. Y., So; Blinov, V. E.; Buzykaev, A. R.; Druzhinin, V. P.; Golubev, V. B.; Kravchenko, E. A.; Onuchin, A. P.; Serednyakov, S. I.; Skovpen, Yu. I.; Solodov, E. P.; Todyshev, K. Yu.; Lankford, A. J.; Gary, J. W.; Long, O.; Eisner, A. M.; Lockman, W. S.; Vazquez, W. Panduro; Chao, D. S.; Cheng, C. H.; Echenard, B.; Flood, K. T.; Hitlin, D. G.; Kim, J.; Miyashita, T. S.; Ongmongkolkul, P.; Porter, F. C.; Rohrken, M.; Huard, Z.; Meadows, B. T.; Pushpawela, B. G.; Sokoloff, M. D.; Sun, L.; Smith, J. G.; Wagner, S. R.; 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. M.; Piccolo, M.; Rotondo, M.; Zallo, A.; Passaggio, S.; Patrignani, C.; Lacker, H. M.; Bhuyan, B.; Mallik, U.; Chen, C.; Cochran, J.; Prell, S.; Ahmed, H.; Gritsan, A. V.; Arnaud, N.; Davier, M.; Le Diberder, F.; Lutz, A. M.; Wormser, G.; Lange, D. J.; Wright, D. M.; Coleman, J. P.; Gabathuler, E.; Hutchcroft, D. E.; Payne, D. J.; Touramanis, C.; Bevan, A. J.; Di Lodovico, F.; Sacco, R.; Cowan, G.; Banerjee, Sw.; Brown, D. N.; Davis, C. L.; Denig, A. G.; Gradl, W.; Griessinger, K.; Hafner, A.; Schubert, K. R.; Barlow, R. J.; Lafferty, G. D.; Cenci, R.; Jawahery, A.; Roberts, D. A.; Cowan, R.; Robertson, S. H.; Dey, B.; Neri, N.; Palombo, F.; Cheaib, R.; Cremaldi, L.; Godang, R.; Summers, D. J.; Taras, P.; De Nardo, G.; Sciacca, C.; Raven, G.; Jessop, C. P.; Losecco, J. M.; 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. R.; 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. A.; Lusiani, A.; Oberhof, B.; Paoloni, E.; Rama, M.; Rizzo, G.; Walsh, J. J.; Smith, A. J. S.; Anulli, F.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Pilloni, A.; Piredda, G.; Buenger, C.; Dittrich, S.; Gruenberg, O.; Hess, M.; Leddig, T.; Voss, C.; Waldi, R.; Adye, T.; Wilson, F. F.; Emery, S.; Vasseur, G.; Aston, D.; Cartaro, C.; Convery, M. R.; Dorfan, J.; Dunwoodie, W.; Ebert, M.; Field, R. C.; Fulsom, B. G.; Graham, M. T.; Hast, C.; Innes, W. R.; Kim, P.; Leith, D. W. G. S.; Luitz, S.; Macfarlane, D. B.; Muller, D. R.; Neal, H.; Ratcliff, B. N.; Roodman, A.; Sullivan, M. K.; Va'Vra, J.; Wisniewski, W. J.; Purohit, M. V.; Wilson, J. R.; Randle-Conde, A.; Sekula, S. J.; Bellis, M.; Burchat, P. R.; Puccio, E. M. T.; Alam, M. S.; Ernst, J. A.; Gorodeisky, R.; Guttman, N.; Peimer, D. R.; Soffer, A.; Spanier, S. M.; Ritchie, J. L.; Schwitters, R. F.; Izen, J. M.; Lou, X. C.; Bianchi, F.; De Mori, F.; Filippi, A.; Gamba, D.; Lanceri, L.; Vitale, L.; Martinez-Vidal, F.; Oyanguren, A.; Albert, J.; Beaulieu, A.; Bernlochner, F. U.; King, G. J.; Kowalewski, R.; Lueck, T.; Nugent, I. M.; Roney, J. M.; Sobie, R. J.; Tasneem, N.; Gershon, T. J.; Harrison, P. F.; Latham, T. E.; Prepost, R.; S. L., Wu

doi:10.1103/PhysRevD.96.092009

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<ECM<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.

The process e(+)e(-) -> pi(+)pi(-)2 pi(0)gamma 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 centerof- mass energy of root 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 (g(mu)(pi+ pi-2 pi 0) - 2)/2 = (17.9 +/- 0.1(stat) +/- 0.6(syst)) x 10(-10) in the energy range 0.85 GeV < ECM < 1.8 GeV. In the same energy range, the impact on the running of the fine-structure constant at the Z(0)-pole is determined as Delta alpha(pi+ pi-2 pi 0) (M-Z(2)) = (4.44 +/- 0.02(stat) +/- 0.14(syst)) x 10(-4). Furthermore, intermediate resonances are studied and especially the cross section of the process e(+)e(-) -> omega pi(0) -> pi(+)pi(-)2 pi(0) is measured.

Measurement of the e(+)e(-) -> pi(+)pi(-)pi(0)pi(0) cross section using initial-state radiation at BABAR

Lees, J. P.;Poireau, V.;Tisserand, V.;Grauges, E.;Palano, A.;Eigen, G.;Brown, D. N.;Kolomensky, Yu. G.;Fritsch, M.;Koch, H.;Schroeder, T.;Hearty, C.;Mattison, T. S.;McKenna, J. A.;So, R. Y.;Blinov, V. E.;Buzykaev, A. R.;Druzhinin, V. P.;Golubev, V. B.;Kravchenko, E. A.;Onuchin, A. P.;Serednyakov, S. I.;Skovpen, Yu. I.;Solodov, E. P.;Todyshev, K. Yu.;Lankford, A. J.;Gary, J. W.;Long, O.;Eisner, A. M.;Lockman, W. S.;Vazquez, W. Panduro;Chao, D. S.;Cheng, C. H.;Echenard, B.;Flood, K. T.;Hitlin, D. G.;Kim, J.;Miyashita, T. S.;Ongmongkolkul, P.;Porter, F. C.;Rohrken, M.;Huard, Z.;Meadows, B. T.;Pushpawela, B. G.;Sokoloff, M. D.;Sun, L.;Smith, J. G.;Wagner, S. R.;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. M.;Piccolo, M.;Rotondo, M.;Zallo, A.;Passaggio, S.;Patrignani, C.;Lacker, H. M.;Bhuyan, B.;Mallik, U.;Chen, C.;Cochran, J.;Prell, S.;Ahmed, H.;Gritsan, A. V.;Arnaud, N.;Davier, M.;Le Diberder, F.;Lutz, A. M.;Wormser, G.;Lange, D. J.;Wright, D. M.;Coleman, J. P.;Gabathuler, E.;Hutchcroft, D. E.;Payne, D. J.;Touramanis, C.;Bevan, A. J.;Di Lodovico, F.;Sacco, R.;Cowan, G.;Banerjee, Sw.;Brown, D. N.;Davis, C. L.;Denig, A. G.;Gradl, W.;Griessinger, K.;Hafner, A.;Schubert, K. R.;Barlow, R. J.;Lafferty, G. D.;Cenci, R.;Jawahery, A.;Roberts, D. A.;Cowan, R.;Robertson, S. H.;Dey, B.;Neri, N.;Palombo, F.;Cheaib, R.;Cremaldi, L.;Godang, R.;Summers, D. J.;Taras, P.;De Nardo, G.;Sciacca, C.;Raven, G.;Jessop, C. P.;LoSecco, J. M.;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. R.;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. A.;Lusiani, A.^{Membro del Collaboration Group};Oberhof, B.;Paoloni, E.;Rama, M.;Rizzo, G.;Walsh, J. J.;Smith, A. J. S.;Anulli, F.;Faccini, R.;Ferrarotto, F.;Ferroni, F.;Pilloni, A.;Piredda, G.;Buenger, C.;Dittrich, S.;Gruenberg, O.;Hess, M.;Leddig, T.;Voss, C.;Waldi, R.;Adye, T.;Wilson, F. F.;Emery, S.;Vasseur, G.;Aston, D.;Cartaro, C.;Convery, M. R.;Dorfan, J.;Dunwoodie, W.;Ebert, M.;Field, R. C.;Fulsom, B. G.;Graham, M. T.;Hast, C.;Innes, W. R.;Kim, P.;Leith, D. W. G. S.;Luitz, S.;MacFarlane, D. B.;Muller, D. R.;Neal, H.;Ratcliff, B. N.;Roodman, A.;Sullivan, M. K.;Va'vra, J.;Wisniewski, W. J.;Purohit, M. V.;Wilson, J. R.;Randle-Conde, A.;Sekula, S. J.;Bellis, M.;Burchat, P. R.;Puccio, E. M. T.;Alam, M. S.;Ernst, J. A.;Gorodeisky, R.;Guttman, N.;Peimer, D. R.;Soffer, A.;Spanier, S. M.;Ritchie, J. L.;Schwitters, R. F.;Izen, J. M.;Lou, X. C.;Bianchi, F.;De Mori, F.;Filippi, A.;Gamba, D.;Lanceri, L.;Vitale, L.;Martinez-Vidal, F.;Oyanguren, A.;Albert, J.;Beaulieu, A.;Bernlochner, F. U.;King, G. J.;Kowalewski, R.;Lueck, T.;Nugent, I. M.;Roney, J. M.;Sobie, R. J.;Tasneem, N.;Gershon, T. J.;Harrison, P. F.;Latham, T. E.;Prepost, R.;Wu, S. L.

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

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	Anno di pubblicazione
	
				2017
			
	Settore Scientifico Disciplinare (validi fino a 24/06/2024)
	
				Settore FIS/01 - Fisica Sperimentale
			
	Titolo Rivista
	
				PHYSICAL REVIEW D
			
	DOI
	
				https://dx.doi.org/10.1103/PhysRevD.96.092009
			
	Parole chiave
	
				MAGNETIC-MOMENT;  TAGGED PHOTONS;  STORAGE-RING;  FINAL-STATES; MONTE-CARLO;  ANNIHILATION;  DETECTOR;  COLLISIONS
			
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