We study the processes gamma gamma -> K-S(0) K-+ pi(-+) and gamma gamma -> K+K- pi(+)pi(-)pi(0) using a data sample of 519: 2fb(-1) recorded by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at center-of-mass energies near the Y(nS) (n = 2, 3, 4) resonances. We observe the eta(c) (1S), chi(c0) (1P) and eta(c) (2S) resonances produced in two-photon interactions and decaying to K+K- pi(+)pi(-)pi(0), with significances of 18.1, 5.4 and 5.3 standard deviations (including systematic errors), respectively, and report 4.0 sigma evidence of the X-c2(1P) decay to this final state. We measure the eta(c)(2S) mass and width in K-S(0) K+- pi(+-) decays, and obtain the values m(eta(c)(2S)) = 3638: 5 +/- 1.5 +/- 0.8 MeV/c(2) and Gamma(eta(c)(2S)) = 13.4 +/- 4: 6 +/- 3.2 MeV, where the first uncertainty is statistical and the second is systematic. We measure the two-photon width times branching fraction for the reported resonance signals, and search for the X-c2 (2P) resonance, but no significant signal is observed.

Observation of eta(c) (1S) and eta(c) (2S) decays to K+K- pi(+) pi(-) pi(0) in two-photon interactions

CALDERINI, GIOVANNI;ANGELINI, CARLO;BATIGNANI, GIOVANNI;BETTARINI, STEFANO;Casarosa G;FORTI, FRANCESCO;GIORGI, MARCELLO;PAOLONI, EUGENIO;RIZZO, GIULIANA;
2011

Abstract

We study the processes gamma gamma -> K-S(0) K-+ pi(-+) and gamma gamma -> K+K- pi(+)pi(-)pi(0) using a data sample of 519: 2fb(-1) recorded by the BABAR detector at the PEP-II asymmetric-energy e(+)e(-) collider at center-of-mass energies near the Y(nS) (n = 2, 3, 4) resonances. We observe the eta(c) (1S), chi(c0) (1P) and eta(c) (2S) resonances produced in two-photon interactions and decaying to K+K- pi(+)pi(-)pi(0), with significances of 18.1, 5.4 and 5.3 standard deviations (including systematic errors), respectively, and report 4.0 sigma evidence of the X-c2(1P) decay to this final state. We measure the eta(c)(2S) mass and width in K-S(0) K+- pi(+-) decays, and obtain the values m(eta(c)(2S)) = 3638: 5 +/- 1.5 +/- 0.8 MeV/c(2) and Gamma(eta(c)(2S)) = 13.4 +/- 4: 6 +/- 3.2 MeV, where the first uncertainty is statistical and the second is systematic. We measure the two-photon width times branching fraction for the reported resonance signals, and search for the X-c2 (2P) resonance, but no significant signal is observed.
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Vitale, L; Lopez March, N; Martinez Vidal, F; Milanes, Da; Oyanguren, A; Albert, J; Banerjee, S; Choi, Hhf; Hamano, K; King, Gj; Kowalewski, R; Lewczuk, Mj; Nugent, Im; Roney, Jm; Sobie, Rj; Gershon, Tj; Harrison, Pf; Latham, Te; Puccio, Emt; Band, Hr; Dasu, S; Flood, Kt; Pan, Y; Prepost, R; Vuosalo, Co; Wu SL Tasneem, N.; Gershon, T. 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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/193584
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