Measurement of direct f0(980) photoproduction on the proton

M. Battaglieri, R. De Vita, A. P. Szczepaniak, K. P. Adhikari, M. Aghasyan, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, I. Bedlinskiy, M. Bellis, N. Benmouna, B. L. Berman, L. BibrzyckiA. S. Biselli, C. Bookwalter, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, S. Chen, L. Cheng, E. Clinton, P. L. Cole, P. Collins, D. Crabb, H. Crannell, V. Crede, J. P. Cummings, D. Dale, A. Daniel, N. Dashyan, R. De Masi, E. De Sanctis, P. V. Degtyarenko, A. Deur

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We report on the results of the first measurement of exclusive f0(980) meson photoproduction on protons for Eγ=3.0-3.8GeV and -t=0.4-1.0GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the π+π- channel by performing a partial wave analysis of the reaction γp→pπ+π-. Clear evidence of the f0(980) meson was found in the interference between P and S waves at Mπ+π-∼1GeV. The S-wave differential cross section integrated in the mass range of the f0(980) was found to be a factor of about 50 smaller than the cross section for the ρ meson. This is the first time the f0(980) meson has been measured in a photoproduction experiment.

Original languageEnglish (US)
Article number102001
JournalPhysical review letters
Issue number10
StatePublished - Mar 9 2009


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