Evidence for a narrow dip structure at 1.9 GeV/c2 in 3π+3π− diffractive photoproduction

Autor: P.L. Frabetti, H.W.K. Cheung, J.P. Cumalat, C. Dallapiccola, J.F. Ginkel, W.E. Johns, M.S. Nehring, E.W. Vaandering, J.N. Butler, S. Cihangir, I. Gaines, P.H. Garbincius, L. Garren, S.A. Gourlay, D.J. Harding, P. Kasper, A. Kreymer, P. Lebrun, S. Shukla, M. Vittone, R. Baldini-Ferroli, S. Bianco, F.L. Fabbri, S. Sarwar, A. Zallo, C. Cawlfield, R. Culbertson, R.W. Gardner, E. Gottschalk, R. Greene, K. Park, A. Rahimi, J. Wiss, G. Alimonti, G. Bellini, M. Boschini, D. Brambilla, B. Caccianiga, L. Cinquini, M. DiCorato, P. Dini, M. Giammarchi, P. Inzani, F. Leveraro, S. Malvezzi, D. Menasce, E. Meroni, L. Milazzo, L. Moroni, D. Pedrini, L. Perasso, F. Prelz, A. Sala, S. Sala, D. Torretta, D. Buchholz, D. Claes, B. Gobbi, B. O'Reilly, J.M. Bishop, N.M. Cason, C.J. Kennedy, G.N. Kim, T.F. Lin, D.L. Puseljic, R.C. Ruchti, W.D. Shephard, J.A. Swiatek, Z.Y. Wu, V. Arena, G. Boca, G. Bonomi, C. Castoldi, G. Gianini, M. Merlo, S.P. Ratti, C. Riccardi, L. Viola, P. Vitulo, A.M. Lopez, L. Mendez, A. Mirles, E. Montiel, D. Olaya, J.E. Ramirez, C. Rivera, Y. Zhang, J.M. Link, V.S. Paolone, P.M. Yager, J.R. Wilson, J. Cao, M. Hosack, P.D. Sheldon, F. Davenport, K. Cho, K. Danyo, T. Handler, B.G. Cheon, Y.S. Chung, J.S. Kang, K.Y. Kim, K.B. Lee, S.S. Myung

Publikováno v: Physics Letters B. 514:240-246

A narrow dip structure has been observed at 1.9 GeV/c$^2$ in a study of diffractive photoproduction of the $~3\pi^+3\pi^-$ final state performed by the Fermilab experiment E687.
Comment: The data of Figure 6 can be obtained by downloading the ra

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https://doi.org/10.1016/s0370-2693(01)00797-3

Light Quark Spectroscopy Results from FOCUS and E687

Autor: Bianco, Stefano, J.M. Link, L. Agostino, G. Alimonti, J.C. Anjos, V. Arena, R. Baldini-Ferroli, S. Barberis, I. Bediaga, G. Bellini, L. Benussi, J.M. Bishop, G. Boca, G. Bonomi, M. Boschini, D. Brambilla, D. Buchholz, J.N. Butler, B. Caccianiga, A. Calandrino, S. Carrillo, E. Casimiro, N.M. Cason, C. Castoldi, C. Cawlfield, A. Cerutti, H.W.K. Cheung, G. Chiodini, K. Cho, Y.S. Chung, S. Cihangir, L. Cinquini, D. Claes, N. Copty, R. Culbertson, J.P. Cumalat, C. Dallapiccola, P. D'Angelo, T.F. Davenport III, J.M. De Miranda, M. DiCorato, P. Dini, A.C. Dos Reis, L. Edera, D. Engh, C.J. Kennedy, S. Erba, F.L. Fabbri, P.L. Frabetti, I. Gaines, P.H. Garbincius, R. Gardner, L.A. Garren, M. Giammarchi, G. Gianini, J.F. Ginkel, B. Gobbi, C. Göbel, E. Gottschalk, S.A. Gourlay, R. Greene, T. Handler, D.J. Harding, H. Hernandez, M. Hosack, P. Inzani, W.E. Johns, J.S. Kang, P.H. Kasper, D.Y. Kim, G.N. Kim, B.R. Ko, A.E. Kreymer, A. Kryemadhi, R. Kutschke, J.W. Kwak, Y. Kwon, P. Lebrun, K.B. Lee, F. Leveraro, G. Liguori, T.F. Lin, A.M. Lopez, J. Magnin, S. Malvezzi, A. Massafferri, D. Menasce, H. Mendez, L. Mendez, M. Merlo, E. Meroni, M. Mezzadri, L. Milazzo, A. Mirles, E. Montiel, L. Moroni, S.S. Myung, M.S. Nehring, D. Olaya, B. O'Reilly, D. Pantea, V.S. Paolone, K.S. Park, H. Park, D. Pedrini, I.M. Pepe, L. Perasso, C. Pontoglio, F. Prelz, M. Purohit, D.L. Puseljic, J. Quinones, A. Rahimi, J.E. Ramirez, S.P. Ratti, M. Reyes, C. Riccardi, C. Rivera, M. Rovere, R.C. Ruchti, S. Sala, A. Sala, M. Sales, A. Sánchez-Hernández, I. Segoni, M. Sheaff, P.D. Sheldon, W.D. Shephard, S. Shukla, F. Simõ, K. Stenson, J.A. Swiatek, P. Torre, D. Torretta, C. Uribe, E.W. Vaandering, F. Vasquez, L. Viola, M. Vittone, P. Vitulo, M.S. Webster, J.R. Wilson, J. Wiss, Z.Y. Wu, P.M. Yager, A. Zallo, Y. Zhang

Using the FOCUS spectrometer (experiments 687 and 831 at Fermilab) we confirm the existence of a diffractively photoproduced enhancement in K^+K^- at 1750 MeV/c^2 with nearly 100 times the statistics of previous experiments. We also observe a narrow

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