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Amplitude analysis of the pi(0)pi(0) system produced in radiative J/psi decays
Inst High Energy Phys, Beijing 100049, Peoples R China..
GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia.;Novosibirsk State Univ, Novosibirsk 630090, Russia..
Inst High Energy Phys, Beijing 100049, Peoples R China..
Carnegie Mellon Univ, Pittsburgh, PA 15213 USA..
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2015 (English)In: Physical Review D, ISSN 1550-7998, E-ISSN 1550-2368, Vol. 92, no 5, 052003Article in journal (Refereed) Published
Abstract [en]

An amplitude analysis of the pi(0)pi(0) system produced in radiative J/psi decays is presented. In particular, a piecewise function that describes the dynamics of the pi(0)pi(0) system is determined as a function of M pi(0)pi(0) from an analysis of the (1.311 +/- 0.011) x 10(9) J/psi decays collected by the BESIII detector. The goal of this analysis is to provide a description of the scalar and tensor components of the pi(0)pi(0) system while making minimal assumptions about the properties or number of poles in the amplitude. Such a model-independent description allows one to integrate these results with other related results from complementary reactions in the development of phenomenological models, which can then be used to directly fit experimental data to obtain parameters of interest. The branching fraction of J/psi -> pi(0)pi(0) is determined to be (1.15 +/- 0.05) x 10(-3), where the uncertainty is systematic only and the statistical uncertainty is negligible.

Place, publisher, year, edition, pages
2015. Vol. 92, no 5, 052003
National Category
Physical Sciences
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URN: urn:nbn:se:uu:diva-264042DOI: 10.1103/PhysRevD.92.052003ISI: 000361119300002OAI: oai:DiVA.org:uu-264042DiVA: diva2:859811
Available from: 2015-10-08 Created: 2015-10-05 Last updated: 2017-12-01Bibliographically approved

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Johansson, TordKupsc, AndrezejLi, CuiPettersson, JoachimSchönning, KarinWolke, Magnus

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