Study of the angular distributions of the reactions [Formula Presented]

M. Ambrogiani, S. Bagnasco, W. Baldini, D. Bettoni, G. Borreani, A. Buzzo, R. Calabrese, R. Cester, P. Dalpiaz, X. Fan, G. Garzoglio, K. Gollwitzer, A. Hahn, S. Jin, J. Kasper, G. Lasio, M. LoVetere, E. Luppi, P. Maas, M. MacrìM. Mandelkern, F. Marchetto, M. Marinelli, E. Menichetti, R. Mussa, M. Obertino, M. Pallavicini, N. Pastrone, C. Patrignani, T. Pedlar, S. Pordes, E. Robutti, J. Rosen, P. Rumerio, A. Santroni, M. Savrié, J. Schultz, K. K. Seth, G. Stancari, M. Stancari, J. Streets, A. Tomaradze, S. Werkema, G. Zioulas

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We report on a study of the angular distributions in the radiative decay of the (Formula presented) and (Formula presented) states formed in (Formula presented) annihilations. These distributions depend on the dynamics of the formation process and the multipole structure of the radiative decay. Using 2090 (Formula presented) and 5908 (Formula presented) events, we have measured the fractional magnetic quadrupole amplitude to be (Formula presented) and (Formula presented) We have also measured the square of the helicity 0 fractional amplitude in the (Formula presented) formation process to be (Formula presented).

Original languageEnglish (US)
Pages (from-to)10
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number5
StatePublished - 2002

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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