- Main
Measurement of the I=1/2 Kπ S-wave amplitude from Dalitz plot analyses of ηc→KK¯π in two-photon interactions
- Lees, JP;
- Poireau, V;
- Tisserand, V;
- Grauges, E;
- Palano, A;
- Eigen, G;
- Brown, DN;
- Kolomensky, Yu G;
- Koch, H;
- Schroeder, T;
- Hearty, C;
- Mattison, TS;
- McKenna, JA;
- So, RY;
- Blinov, VE;
- Buzykaev, AR;
- Druzhinin, VP;
- Golubev, VB;
- Kravchenko, EA;
- Onuchin, AP;
- Serednyakov, SI;
- Skovpen, Yu I;
- Solodov, EP;
- Todyshev, K Yu;
- Lankford, AJ;
- Gary, JW;
- Long, O;
- Eisner, AM;
- Lockman, WS;
- Vazquez, W Panduro;
- Chao, DS;
- Cheng, CH;
- Echenard, B;
- Flood, KT;
- Hitlin, DG;
- Kim, J;
- Miyashita, TS;
- Ongmongkolkul, P;
- Porter, FC;
- Röhrken, M;
- Huard, Z;
- Meadows, BT;
- Pushpawela, BG;
- Sokoloff, MD;
- Sun, L;
- Smith, JG;
- Wagner, SR;
- 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, IM;
- Piccolo, M;
- Zallo, A;
- Passaggio, S;
- Patrignani, C;
- Bhuyan, B;
- Mallik, U;
- Chen, C;
- Cochran, J;
- Prell, S;
- Ahmed, H;
- Pennington, MR;
- Gritsan, AV;
- Arnaud, N;
- Davier, M;
- Le Diberder, F;
- Lutz, AM;
- Wormser, G;
- Lange, DJ;
- Wright, DM;
- Coleman, JP;
- Gabathuler, E;
- Hutchcroft, DE;
- Payne, DJ;
- Touramanis, C;
- Bevan, AJ;
- Di Lodovico, F;
- Sacco, R;
- Cowan, G;
- Banerjee, Sw;
- Brown, DN;
- Davis, CL;
- Denig, AG;
- Fritsch, M;
- Gradl, W;
- Griessinger, K;
- Hafner, A;
- Schubert, KR;
- Barlow, RJ;
- Lafferty, GD;
- Cenci, R;
- Jawahery, A;
- Roberts, DA;
- Cowan, R;
- Cheaib, R;
- Robertson, SH;
- Dey, B;
- Neri, N;
- Palombo, F;
- Cremaldi, L;
- Godang, R;
- Summers, DJ;
- Taras, P;
- De Nardo, G;
- Sciacca, C;
- Raven, G;
- Jessop, CP;
- LoSecco, JM;
- Honscheid, K;
- Kass, R;
- Gaz, A;
- Margoni, M;
- Posocco, M;
- Rotondo, M;
- Simi, G;
- Simonetto, F;
- Stroili, R;
- Akar, S;
- Ben-Haim, E;
- Bomben, M;
- Bonneaud, GR;
- 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, MA;
- Lusiani, A;
- Oberhof, B;
- Paoloni, E;
- Rama, M;
- Rizzo, G;
- Walsh, JJ;
- Smith, AJS;
- Anulli, F;
- Faccini, R;
- Ferrarotto, F;
- Ferroni, F;
- Pilloni, A;
- Piredda, G;
- Bünger, C;
- Dittrich, S;
- Grünberg, O;
- Heß, M;
- Leddig, T;
- Voß, C;
- Waldi, R;
- Adye, T;
- Wilson, FF;
- Emery, S;
- de Monchenault, G Hamel;
- Vasseur, G;
- Aston, D;
- Cartaro, C;
- Convery, MR;
- Dorfan, J;
- Dunwoodie, W;
- Ebert, M;
- Field, RC;
- Fulsom, BG;
- Graham, MT;
- Hast, C;
- Innes, WR;
- Kim, P;
- Leith, DWGS;
- Luitz, S;
- Luth, V;
- MacFarlane, DB;
- Muller, DR;
- Neal, H;
- Ratcliff, BN;
- Roodman, A;
- Sullivan, MK;
- Va’vra, J;
- Wisniewski, WJ;
- Purohit, MV;
- Wilson, JR;
- Randle-Conde, A;
- Sekula, SJ;
- Bellis, M;
- Burchat, PR;
- Puccio, EMT;
- Alam, MS;
- Ernst, JA;
- Gorodeisky, R;
- Guttman, N;
- Peimer, DR;
- Soffer, A;
- Spanier, SM;
- Ritchie, JL;
- Schwitters, RF;
- Izen, JM;
- Lou, XC;
- Bianchi, F;
- De Mori, F;
- Filippi, A;
- Gamba, D;
- Lanceri, L;
- Vitale, L;
- Martinez-Vidal, F;
- Oyanguren, A;
- Albert, J;
- Beaulieu, A;
- Bernlochner, FU;
- King, GJ;
- Kowalewski, R;
- Lueck, T;
- Nugent, IM;
- Roney, JM;
- Tasneem, N;
- Gershon, TJ;
- Harrison, PF;
- Latham, TE;
- Prepost, R;
- Wu, SL
Abstract
We study the processes γγ→KS0K±πℓ and γγ→K+K-π0 using a data sample of 519 fb-1 recorded with the BABAR detector operating at the SLAC PEP-II asymmetric-energy e+e- collider at center-of-mass energies at and near the Υ(nS) (n=2, 3, 4) resonances. We observe ηc decays to both final states and perform Dalitz plot analyses using a model-independent partial wave analysis technique. This allows a model-independent measurement of the mass-dependence of the I=1/2 Kπ S-wave amplitude and phase. A comparison between the present measurement and those from previous experiments indicates similar behavior for the phase up to a mass of 1.5 GeV/c2. In contrast, the amplitudes show very marked differences. The data require the presence of a new a0(1950) resonance with parameters m=1931±14±22 MeV/c2 and Γ=271±22±29 MeV.
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