The f(1)(1285) meson withmass 1281.0 +/- 0.8MeV/c(2) and width 18.4 +/- 1.4MeV (full width at half maximum) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the eta pi(+)pi(-), K+(K) over bar (0) pi(-), and (K-K0)pi(+) decay channels from threshold up to a center-of-mass energy of 2.8 GeV. The mass, width, and an amplitude analysis of the eta pi(+)pi(-) final-state Dalitz distribution are consistent with the axial-vector J(P) = 1(+) f(1)(1285) identity, rather than the pseudoscalar 0(-) eta(1295). The production mechanism is more consistent with s-channel decay of a high-mass N* state and not with t-channel meson exchange. Decays to eta pi pi go dominantly via the intermediate a(0)(+/-) (980)pi(-/+) states, with the branching ratio Gamma [a(0)pi (no (K) over barK)]/Gamma[eta pi pi (all)] = 0.74 +/- 0.09. The branching ratios Gamma (K (K) over bar pi)/Gamma(eta pi pi) = 0.216 +/- 0.033 and Gamma (gamma rho(0))/Gamma(eta pi pi) = 0.047 +/- 0.018 were also obtained. The first is in agreement with previous data for the f(1)(1285), while the latter is lower than the world average.
Dickson, R., et al. "Photoproduction of the <math><mrow><msub><mi>f</mi><mn>1</mn></msub><mrow><mo>(</mo><mn>1285</mn><mo>)</mo></mrow></mrow></math> meson." Physical Review C, vol. 93, no. 6, Jun. 2016. https://doi.org/10.1103/PhysRevC.93.065202
Dickson, R., Schumacher, R. A., Adhikari, K. P., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Badui, R. A., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., ... Zonta, I. (2016). Photoproduction of the <math><mrow><msub><mi>f</mi><mn>1</mn></msub><mrow><mo>(</mo><mn>1285</mn><mo>)</mo></mrow></mrow></math> meson. Physical Review C, 93(6). https://doi.org/10.1103/PhysRevC.93.065202
Dickson, R., Schumacher, R. A., Adhikari, K. P., et al., "Photoproduction of the <math><mrow><msub><mi>f</mi><mn>1</mn></msub><mrow><mo>(</mo><mn>1285</mn><mo>)</mo></mrow></mrow></math> meson," Physical Review C 93, no. 6 (2016), https://doi.org/10.1103/PhysRevC.93.065202
@article{osti_1366475,
author = {Dickson, R. and Schumacher, R. A. and Adhikari, K. P. and Akbar, Z. and Amaryan, M. J. and Anefalos Pereira, S. and Badui, R. A. and Ball, J. and Battaglieri, M. and Batourine, V. and others},
title = {Photoproduction of the <math><mrow><msub><mi>f</mi><mn>1</mn></msub><mrow><mo>(</mo><mn>1285</mn><mo>)</mo></mrow></mrow></math> meson},
annote = {The f(1)(1285) meson withmass 1281.0 +/- 0.8MeV/c(2) and width 18.4 +/- 1.4MeV (full width at half maximum) was measured for the first time in photoproduction from a proton target using CLAS at Jefferson Lab. Differential cross sections were obtained via the eta pi(+)pi(-), K+(K) over bar (0) pi(-), and (K-K0)pi(+) decay channels from threshold up to a center-of-mass energy of 2.8 GeV. The mass, width, and an amplitude analysis of the eta pi(+)pi(-) final-state Dalitz distribution are consistent with the axial-vector J(P) = 1(+) f(1)(1285) identity, rather than the pseudoscalar 0(-) eta(1295). The production mechanism is more consistent with s-channel decay of a high-mass N* state and not with t-channel meson exchange. Decays to eta pi pi go dominantly via the intermediate a(0)(+/-) (980)pi(-/+) states, with the branching ratio Gamma [a(0)pi (no (K) over barK)]/Gamma[eta pi pi (all)] = 0.74 +/- 0.09. The branching ratios Gamma (K (K) over bar pi)/Gamma(eta pi pi) = 0.216 +/- 0.033 and Gamma (gamma rho(0))/Gamma(eta pi pi) = 0.047 +/- 0.018 were also obtained. The first is in agreement with previous data for the f(1)(1285), while the latter is lower than the world average.},
doi = {10.1103/PhysRevC.93.065202},
url = {https://www.osti.gov/biblio/1366475},
journal = {Physical Review C},
issn = {ISSN 2469-9985},
number = {6},
volume = {93},
place = {United States},
publisher = {American Physical Society (APS)},
year = {2016},
month = {06}}
USDOE Office of Science - Office of Nuclear Physics; National Science Foundation (NSF); United Kingdom Science and Technology Facilities Council; Instituto Nazionale di Fisica Nucleare (INFN)
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