Exclusive measurement of the decay
In: Physics Letters B, Jg. 707 (2012-01-20), Heft 2, S. 243-249
Online
academicJournal
Zugriff:
Abstract: An exclusive measurement of the decay has been performed at the WASA facility at COSY. The η mesons were produced in the fusion reaction X at a proton beam momentum of 1.7 GeV/c. Efficiency corrected differential distributions have been extracted based on events after background subtraction. The measured pion angular distribution is consistent with a relative p-wave of the two-pion system, whereas the measured photon energy spectrum was found at variance with the simplest gauge invariant matrix element of . A parameterization of the data can be achieved by the additional inclusion of the empirical pion vector form factor multiplied by a first-order polynomial in the squared invariant mass of the system. [Copyright &y& Elsevier]
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Exclusive measurement of the decay
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Autor/in / Beteiligte Person: | Adlarson, P. ; Adolph, C. ; Augustyniak, W. ; Bardan, W. ; Bashkanov, M. ; Bednarski, T. ; Bergmann, F.S. ; Berłowski, M. ; Bhatt, H. ; Brinkmann, K. T. ; Büscher, M. ; Calén, H. ; Clement, H. ; Coderre, D. ; Czerwiński, E. ; Doroshkevich, E. ; Engels, R. ; Erven, W. ; Eyrich, W. ; Fedorets, P. |
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Zeitschrift: | Physics Letters B, Jg. 707 (2012-01-20), Heft 2, S. 243-249 |
Veröffentlichung: | 2012 |
Medientyp: | academicJournal |
ISSN: | 0370-2693 (print) |
DOI: | 10.1016/j.physletb.2011.12.027 |
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