期刊
PHYSICAL REVIEW D
卷 93, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.93.012005
关键词
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资金
- SLAC
- U.S. Department of Energy
- National Science Foundation
- Natural Sciences and Engineering Research Council (Canada)
- Commissariat a l'Energie Atomique
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung
- Deutsche Forschungsgemeinschaft (Germany)
- Istituto Nazionale di Fisica Nucleare (Italy)
- Foundation for Fundamental Research on Matter (Netherlands)
- Research Council of Norway
- Ministry of Education and Science of the Russian Federation, Ministerio de Economia y Competitividad (Spain)
- Science and Technology Facilities Council (United Kingdom)
- Marie-Curie IEF program (European Union)
- A. P. Sloan Foundation (USA)
- Binational Science Foundation (USA-Israel)
- U.S. Department of Energy, Office of Science, Office of Nuclear Physics [DE-AC05-06OR23177]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1404070] Funding Source: National Science Foundation
- Science and Technology Facilities Council [ST/L00352X/1, ST/M000761/1, ST/M000729/1, ST/L003163/1, ST/M004791/1 GRIDPP, ST/J005495/1, ST/K00140X/1, ST/M004791/1, ST/I003576/1, PP/E003095/1, ST/K003534/1 GRIDPP, ST/K003534/1, ST/I000097/1, ST/L003163/1 LHCb Upgrades, ST/L006146/1, ST/J004855/1] Funding Source: researchfish
- STFC [ST/J004855/1, ST/I003576/1, ST/M004791/1, ST/M000729/1, ST/N000420/1, ST/K00140X/1, ST/J005495/1, PP/E003095/1, ST/K003534/1, ST/L00352X/1, ST/L006146/1, ST/M000761/1, ST/I000097/1, ST/L003163/1] Funding Source: UKRI
We study the processes gamma gamma -> (KSK +/-)-K-0 pi(-/+) and gamma gamma -> K+K-pi(0) 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 Upsilon(nS) (n = 2, 3, 4) resonances. We observe eta(c) 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 K pi 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/c(2). In contrast, the amplitudes show very marked differences. The data require the presence of a new a(0)(1950) resonance with parameters m = 1931 +/- 14 +/- 22 MeV/c(2) and Gamma = 271 +/- 22 +/- 29 MeV.
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