The f2(1565) in interactions at rest
/ Authors
C. A. Baker, B. Barnett, C. Batty, K. Braune, D. Bugg, O. Cramer, V. Crede, N. Djaoshvili, W. Dünnweber, M. Faessler
and 20 more authors
N. Hessey, P. Hidas, C. Hodd, D. Jamnik, H. Kalinowsky, J. Kisiel, E. Klempt, C. Kolo, L. Montanet, B. Pick, W. Roethel, A. Sarantsev, I. Scott, C. Strassburger, U. Thoma, C. Volker, S. Wallis, D. Walther, K. Wittmack, B. Zou
/ Abstract
Abstract Data are presented on the reaction p p→ωωπ 0 at rest from the Crystal Barrel detector. These data identify a strong signal due to f 2 (1565)→ ωω . The relative production from initial p p states 3 P 2 , 3 P 1 and 1 S 0 is well determined from ωω decay angular correlations; P-state annihilation dominates strongly. A combined fit is made with data on p p→3π 0 at rest, where f 2 (1565)→ π 0 π 0 is observed. A Flatte formula is fitted to the f 2 (1565), including the s -dependence of decay widths to ωω and ρρ . The data then determine the K-matrix mass, M =1598±11(stat)±9(syst) MeV. The decay width to 2 π is very small, of order 2% of the total width.
Journal: Physics Letters B