Interference Study of the [Formula presented] in the Reaction [Formula presented]

M. Andreotti, S. Bagnasco, W. Baldini, D. Bettoni, G. Borreani, A. Buzzo, R. Calabrese, R. Cester, G. Cibinetto, P. Dalpiaz, G. Garzoglio, K. E. Gollwitzer, M. Graham, M. Hu, D. Joffe, J. Kasper, G. Lasio, M. Lo Vetere, E. Luppi, M. MacrìM. Mandelkern, F. Marchetto, M. Marinelli, E. Menichetti, Z. Metreveli, R. Mussa, M. Negrini, M. M. Obertino, M. Pallavicini, N. Pastrone, C. Patrignani, T. K. Pedlar, S. Pordes, E. Robutti, W. Roethel, J. L. Rosen, P. Rumerio, R. Rusack, A. Santroni, J. Schultz, S. H. Seo, K. K. Seth, G. Stancari, M. Stancari, A. Tomaradze, I. Uman, T. Vidnovic, S. Werkema, P. Zweber

Research output: Contribution to journalArticlepeer-review


Fermilab experiment E835 has observed [Formula presented] annihilation production of the charmonium state [Formula presented] and its subsequent decay into [Formula presented]. Although the resonant amplitude is an order of magnitude smaller than that of the nonresonant continuum production of [Formula presented], an enhanced interference signal is evident. A partial wave expansion is used to extract physics parameters. The amplitudes [Formula presented] and [Formula presented], of comparable strength, dominate the expansion. Both are accessed by [Formula presented] in the entrance [Formula presented] channel. The product of the input and output branching fractions is determined to be [Formula presented].

Original languageEnglish (US)
JournalPhysical review letters
Issue number9
StatePublished - Aug 28 2003


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