| Author(s) |
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|---|---|
| Abstract |
We present measurements of the recoil proton polarization for thed(γ→,p→)nreaction atθc.m.=90°for photon energies up to 2.4 GeV. These are the first data in this reaction for polarization transfer with circularly polarized photons. The induced polarizationpyvanishes above 1 GeV, contrary to meson-baryon model expectations, in which resonances lead to large polarizations. However, the polarization transferCxdoes not vanish above 1 GeV, inconsistent with hadron helicity conservation. Thus, we show that the scaling behavior observed in thed(γ,p)ncross sections is not a result of perturbative QCD. These data should provide important tests of new nonperturbative calculations in the intermediate energy regime. |
| Format | |
| Identifier(s) | |
| Publication Date |
2001-01-01
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| Publication Title |
Physical Review Letters
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| Volume |
86
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| Issue |
14
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| First Page |
2975
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| Last Page |
2979
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| Subject | |
| Community | |
| Comments | |
| Recommended Citation |
Wijesooriya, K.; Afanasev, A.; Amarian, M.; Aniol, K. A.; Becher, S.; Benslama, K.; Bimbot, L.; Bosted, P.; Brash, E. J.; Calarco, J.; Chai, Z.; Chang, C. C.; Chang, T.; Chen, J. P.; Choi, S.; Chudakov, E.; Churchwell, S.; Crovelli, D.; Dieterich, S.; Dumalski, S.; Dutta, D.; Epstein, M. B.; Fissum, K.; Fox, B.; Frullani, S.; Gao, H.; Gao, J.; Garibaldi, F.; Gayou, O.; Gilman, R.; Glamazdin, S.; Glashausser, C.; Gomez, Sergio Leonardo; Gorbenko, V.; Hansen, O.; Holt, R. J.; Hovdebo, J.; Huber, G. M.; de Jager, C. W.; Jiang, X.; Jones, C.; Jones, M. K.; Kelly, J.; Kinney, E.; Kooijman, Edgar E; Kumbartzki, G.; Kuss, M.; LeRose, J.; Liang, M.; Lindgren, R.; Liyanage, N.; Malov, S.; Margaziotis, D. J.; Markowitz, P.; McCormick, K.; Meekins, D.; Meziani, Z. E.; Michaels, R.; Mitchell, J.; Morand, L.; Perdrisat, C. F.; Pomatsalyuk, R.; Punjabi, V.; Ransome, R. D.; Roche, R.; Rvachev, M.; Saha, A.; Sarty, A.; Schulte, E. C.; Simon, G.; Strauch, S.; Suleiman, R.; Todor, L.; Ulmer, P. E.; Urciuoli, G. M.; Wojtsekhowski, B.; Xiong, F.; Xu, W. (2001). Polarization Measurements in High-energy Deuteron Photodisintegration. Physical Review Letters 86(14) 2975-2979. doi: 10.1103/PhysRevLett.86.2975. Retrieved from https://oaks.kent.edu/bscipubs/103
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Copyright 2001, American Physical Society: http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.86.2975