Study of the e+e− to K+K− reaction in the energy range from 2.6 to 8.0 GeV

Lees, J.  . p.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D.  . n.; Kerth, L.  . t.; Kolomensky, Y. u. G.; Lee, M.  . j.; Lynch, G.; Koch, H.; Schroeder, T.; Hearty, C.; Mattison, T.  . s.; Mckenna, J.  . a.; R.  . y., So; Khan, A.; Blinov, V.  . e.; Buzykaev, A.  . r.; Druzhinin, V.  . p.; Golubev, V.  . b.; Kravchenko, E.  . a.; Onuchin, A.  . p.; Serednyakov, S.  . i.; Skovpen, Y. u. I.; Solodov, E.  . p.; Todyshev, K. Y. u.; Lankford, A.  . j.; Dey, B.; Gary, J.  . w.; Long, O.; Franco Sevilla, M.; Hong, T.  . m.; Kovalskyi, D.; Richman, J.  . d.; West, C.  . a.; Eisner, A.  . m.; Lockman, W.  . s.; Panduro Vazquez, W.; Schumm, B.  . a.; Seiden, A.; Chao, D.  . s.; Cheng, C.  . h.; Echenard, B.; Flood, K.  . t.; Hitlin, D.  . g.; Kim, J.; Miyashita, T.  . s.; Ongmongkolkul, P.; Porter, F.  . c.; Röhrken, M.; Andreassen, R.; Huard, Z.; Meadows, B.  . t.; Pushpawela, B.  . g.; Sokoloff, M.  . d.; Sun, L.; Ford, W.  . t.; Smith, J.  . g.; Wagner, S.  . r.; Ayad, R.; Toki, W.  . h.; Spaan, B.; Bernard, D.; Verderi, M.; Playfer, S.; Bettoni, D.; Bozzi, C.; Calabrese, R.; Cibinetto, G.; Fioravanti, E.; Garzia, I.; Luppi, E.; Piemontese, L.; Santoro, V.; Calcaterra, A.; de Sangro, R.; Finocchiaro, G.; Martellotti, S.; Patteri, P.; Peruzzi, I.  . m.; Piccolo, M.; Zallo, A.; Contri, R.; Monge, M.  . r.; Passaggio, S.; Patrignani, C.; Bhuyan, B.; Prasad, V.; Adametz, A.; Uwer, U.; Lacker, H.  . m.; Mallik, U.; Chen, C.; Cochran, J.; Prell, S.; Ahmed, H.; Gritsan, A.  . v.; Arnaud, N.; Davier, M.; Derkach, D.; Grosdidier, G.; Le Diberder, F.; Lutz, A.  . m.; Malaescu, B.; Roudeau, P.; Stocchi, A.; Wormser, G.; Lange, D.  . j.; Wright, D.  . m.; Coleman, J.  . p.; Fry, J.  . r.; Gabathuler, E.; Hutchcroft, D.  . e.; Payne, D.  . j.; Touramanis, C.; Bevan, A.  . j.; Di Lodovico, F.; Sacco, R.; Cowan, G.; Brown, D.  . n.; Davis, C.  . l.; Denig, A.  . g.; Fritsch, M.; Gradl, W.; Griessinger, K.; Hafner, A.; Schubert, K.  . r.; Barlow, R.  . j.; Lafferty, G.  . d.; Cenci, Riccardo; Hamilton, B.; Jawahery, A.; Roberts, D.  . a.; Cowan, R.; Cheaib, R.; Patel, P.  . m.; Robertson, S.  . h.; Neri, N.; Palombo, F.; Cremaldi, L.; Godang, R.; Summers, D.  . j.; Simard, M.; Taras, P.; De Nardo, G.; Onorato, G.; Sciacca, C.; Raven, G.; Jessop, C.  . p.; Losecco, J.  . m.; Honscheid, K.; Kass, R.; Margoni, M.; Morandin, M.; Posocco, M.; Rotondo, M.; Simi, G.; Simonetto, F.; Stroili, R.; Akar, S.; Ben Haim, E.; Bomben, M.; Bonneaud, G.  . r.; Briand, H.; Calderini, G.; Chauveau, J.; Leruste, P. h.; Marchiori, G.; Ocariz, J.; Biasini, M.; Manoni, E.; Rossi, A.; Angelini, C.; Batignani, G.; Bettarini, S.; Carpinelli, M.; Casarosa, G.; Chrzaszcz, M.; Forti, F.; Giorgi, M.  . a.; Lusiani, Alberto; Oberhof, B.; Paoloni, E.; Rama, M.; Rizzo, G.; Walsh, J.  . j.; Lopes Pegna, D.; Olsen, J.; Smith, A.  . j.  . s.; Anulli, F.; Faccini, R.; Ferrarotto, F.; Ferroni, F.; Gaspero, M.; Pilloni, A.; Piredda, G.; Bünger, C.; Dittrich, S.; Grünberg, O.; Hess, M.; Leddig, T.; Voß, C.; Waldi, R.; Adye, T.; Olaiya, E.  . o.; Wilson, F.  . f.; Emery, S.; Vasseur, G.; Aston, D.; Bard, D.  . j.; Cartaro, C.; Convery, M.  . r.; Dorfan, J.; Dubois Felsmann, G.  . p.; 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.; Luth, V.; Macfarlane, D.  . b.; Muller, D.  . r.; Neal, H.; Pulliam, T.; Ratcliff, B.  . n.; Roodman, A.; Schindler, R.  . h.; Snyder, A.; Su, D.; Sullivan, M.  . k.; Va’Vra, J.; Wisniewski, W.  . j.; Wulsin, H.  . w.; 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.; Banerjee, S. w.; Beaulieu, A.; Bernlochner, F.  . u.; Choi, H.  . h.  . f.; King, G.  . j.; Kowalewski, R.; Lewczuk, M.  . j.; Lueck, T.; Nugent, I.  . m.; Roney, J.  . m.; Sobie, R.  . j.; Tasneem, N.; Gershon, T.  . j.; Harrison, P.  . f.; Latham, T.  . e.; Band, H.  . r.; Dasu, S.; Pan, Y.; Prepost, R.; S.  . l., Wu

doi:10.1103/PhysRevD.92.072008

The e+e-→K+K- cross section and charged-kaon electromagnetic form factor are measured in the e+e- center-of-mass energy range (E) from 2.6 to 8.0 GeV using the initial-state radiation technique with an undetected photon. The study is performed using 469fb-1 of data collected with the BABAR detector at the PEP-II2 e+e- collider at center-of-mass energies near 10.6 GeV. The form factor is found to decrease with energy faster than 1/E2 and approaches the asymptotic QCD prediction. Production of the K+K- final state through the J/ψ and ψ(2S) intermediate states is observed. The results for the kaon form factor are used together with data from other experiments to perform a model-independent determination of the relative phases between electromagnetic (single-photon) and strong amplitudes in J/ψ and ψ(2S)→K+K- decays. The values of the branching fractions measured in the reaction e+e-→K+K- are shifted relative to their true values due to interference between resonant and nonresonant amplitudes. The values of these shifts are determined to be about ±5% for the J/ψ meson and ±15% for the ψ(2S) meson.

Study of the e+e− to K+K− reaction in the energy range from 2.6 to 8.0 GeV

Lees, J. .p.;Poireau, V.;Tisserand, V.;Grauges, E.;Palano, A.;Eigen, G.;Stugu, B.;Brown, D. .n.;Kerth, L. .t.;Kolomensky, Y.u. G.;Lee, M. .j.;Lynch, G.;Koch, H.;Schroeder, T.;Hearty, C.;Mattison, T. .s.;Mckenna, J. .a.;So, R. .y.;Khan, A.;Blinov, V. .e.;Buzykaev, A. .r.;Druzhinin, V. .p.;Golubev, V. .b.;Kravchenko, E. .a.;Onuchin, A. .p.;Serednyakov, S. .i.;Skovpen, Y.u. I.;Solodov, E. .p.;Todyshev, K. Y.u.;Lankford, A. .j.;Dey, B.;Gary, J. .w.;Long, O.;Franco Sevilla, M.;Hong, T. .m.;Kovalskyi, D.;Richman, J. .d.;West, C. .a.;Eisner, A. .m.;Lockman, W. .s.;Panduro Vazquez, W.;Schumm, B. .a.;Seiden, A.;Chao, D. .s.;Cheng, C. .h.;Echenard, B.;Flood, K. .t.;Hitlin, D. .g.;Kim, J.;Miyashita, T. .s.;Ongmongkolkul, P.;Porter, F. .c.;Röhrken, M.;Andreassen, R.;Huard, Z.;Meadows, B. .t.;Pushpawela, B. .g.;Sokoloff, M. .d.;Sun, L.;Ford, W. .t.;Smith, J. .g.;Wagner, S. .r.;Ayad, R.;Toki, W. .h.;Spaan, B.;Bernard, D.;Verderi, M.;Playfer, S.;Bettoni, D.;Bozzi, C.;Calabrese, R.;Cibinetto, G.;Fioravanti, E.;Garzia, I.;Luppi, E.;Piemontese, L.;Santoro, V.;Calcaterra, A.;de Sangro, R.;Finocchiaro, G.;Martellotti, S.;Patteri, P.;Peruzzi, I. .m.;Piccolo, M.;Zallo, A.;Contri, R.;Monge, M. .r.;Passaggio, S.;Patrignani, C.;Bhuyan, B.;Prasad, V.;Adametz, A.;Uwer, U.;Lacker, H. .m.;Mallik, U.;Chen, C.;Cochran, J.;Prell, S.;Ahmed, H.;Gritsan, A. .v.;Arnaud, N.;Davier, M.;Derkach, D.;Grosdidier, G.;Le Diberder, F.;Lutz, A. .m.;Malaescu, B.;Roudeau, P.;Stocchi, A.;Wormser, G.;Lange, D. .j.;Wright, D. .m.;Coleman, J. .p.;Fry, J. .r.;Gabathuler, E.;Hutchcroft, D. .e.;Payne, D. .j.;Touramanis, C.;Bevan, A. .j.;Di Lodovico, F.;Sacco, R.;Cowan, G.;Brown, D. .n.;Davis, C. .l.;Denig, A. .g.;Fritsch, M.;Gradl, W.;Griessinger, K.;Hafner, A.;Schubert, K. .r.;Barlow, R. .j.;Lafferty, G. .d.;CENCI, RICCARDO;Hamilton, B.;Jawahery, A.;Roberts, D. .a.;Cowan, R.;Cheaib, R.;Patel, P. .m.;Robertson, S. .h.;Neri, N.;Palombo, F.;Cremaldi, L.;Godang, R.;Summers, D. .j.;Simard, M.;Taras, P.;De Nardo, G.;Onorato, G.;Sciacca, C.;Raven, G.;Jessop, C. .p.;Losecco, J. .m.;Honscheid, K.;Kass, R.;Margoni, M.;Morandin, M.;Posocco, M.;Rotondo, M.;Simi, G.;Simonetto, F.;Stroili, R.;Akar, S.;Ben Haim, E.;Bomben, M.;Bonneaud, G. .r.;Briand, H.;Calderini, G.;Chauveau, J.;Leruste, P.h.;Marchiori, G.;Ocariz, J.;Biasini, M.;Manoni, E.;Rossi, A.;Angelini, C.;Batignani, G.;Bettarini, S.;Carpinelli, M.;Casarosa, G.;Chrzaszcz, M.;Forti, F.;Giorgi, M. .a.;LUSIANI, Alberto;Oberhof, B.;Paoloni, E.;Rama, M.;Rizzo, G.;Walsh, J. .j.;Lopes Pegna, D.;Olsen, J.;Smith, A. .j. .s.;Anulli, F.;Faccini, R.;Ferrarotto, F.;Ferroni, F.;Gaspero, M.;Pilloni, A.;Piredda, G.;Bünger, C.;Dittrich, S.;Grünberg, O.;Hess, M.;Leddig, T.;Voß, C.;Waldi, R.;Adye, T.;Olaiya, E. .o.;Wilson, F. .f.;Emery, S.;Vasseur, G.;Aston, D.;Bard, D. .j.;Cartaro, C.;Convery, M. .r.;Dorfan, J.;Dubois Felsmann, G. .p.;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.;Luth, V.;Macfarlane, D. .b.;Muller, D. .r.;Neal, H.;Pulliam, T.;Ratcliff, B. .n.;Roodman, A.;Schindler, R. .h.;Snyder, A.;Su, D.;Sullivan, M. .k.;Va’Vra, J.;Wisniewski, W. .j.;Wulsin, H. .w.;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.;Banerjee, S.w.;Beaulieu, A.;Bernlochner, F. .u.;Choi, H. .h. .f.;King, G. .j.;Kowalewski, R.;Lewczuk, M. .j.;Lueck, T.;Nugent, I. .m.;Roney, J. .m.;Sobie, R. .j.;Tasneem, N.;Gershon, T. .j.;Harrison, P. .f.;Latham, T. .e.;Band, H. .r.;Dasu, S.;Pan, Y.;Prepost, R.;Wu, S. .l.

2015

Abstract

The e+e-→K+K- cross section and charged-kaon electromagnetic form factor are measured in the e+e- center-of-mass energy range (E) from 2.6 to 8.0 GeV using the initial-state radiation technique with an undetected photon. The study is performed using 469fb-1 of data collected with the BABAR detector at the PEP-II2 e+e- collider at center-of-mass energies near 10.6 GeV. The form factor is found to decrease with energy faster than 1/E2 and approaches the asymptotic QCD prediction. Production of the K+K- final state through the J/ψ and ψ(2S) intermediate states is observed. The results for the kaon form factor are used together with data from other experiments to perform a model-independent determination of the relative phases between electromagnetic (single-photon) and strong amplitudes in J/ψ and ψ(2S)→K+K- decays. The values of the branching fractions measured in the reaction e+e-→K+K- are shifted relative to their true values due to interference between resonant and nonresonant amplitudes. The values of these shifts are determined to be about ±5% for the J/ψ meson and ±15% for the ψ(2S) meson.

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	Anno di pubblicazione
	
			2015
		
	Settore Scientifico Disciplinare
	
			Settore FIS/01 - Fisica Sperimentale
		
	Titolo Rivista
	
			PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY
		
	DOI
	
			https://dx.doi.org/10.1103/PhysRevD.92.072008
		
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Study of the e+e− to K+K− reaction in the energy range from 2.6 to 8.0 GeV

2015

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