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.

Measurement of the I=1 /2 Kπ S -wave amplitude from Dalitz plot analyses of ηc →k K ¯ π in two-photon interactions / Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D.N., Kolomensky, Y.u.G., 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., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:1(2016). [10.1103/PhysRevD.93.012005]

Measurement of the I=1 /2 Kπ S -wave amplitude from Dalitz plot analyses of ηc →k K ¯ π in two-photon interactions

CARPINELLI, Massimo;
2016-01-01

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.
2016
Measurement of the I=1 /2 Kπ S -wave amplitude from Dalitz plot analyses of ηc →k K ¯ π in two-photon interactions / Lees, J.P., Poireau, V., Tisserand, V., Grauges, E., Palano, A., Eigen, G., Brown, D.N., Kolomensky, Y.u.G., 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., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:1(2016). [10.1103/PhysRevD.93.012005]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

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/11388/175717
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 26
  • ???jsp.display-item.citation.isi??? 19
social impact