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arXiv 0908.2968nucl-exhep-ex
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质子对的硬光致衰变

Hard Photodisintegration of a Proton Pair

I. Pomerantz, N. Bubis, K. Allada, A. Beck, S. Beck, B. L. Berman, W. Boeglin, A. Camsonne, M. Canan, K. Chirapatpimol, E. Cisbani, F. Cusanno, C. W. de Jager, … 展开作者

I. Pomerantz, N. Bubis, K. Allada, A. Beck, S. Beck, B. L. Berman, W. Boeglin, A. Camsonne, M. Canan, K. Chirapatpimol, E. Cisbani, F. Cusanno, C. W. de Jager, C. Dutta, F. Garibaldi, O. Geagla, R. Gilman, J. Glister, D. W. Higinbotham, X. Jiang, A. T. Katramatou, E. Khrosinkova, B. Lee, J. J. LeRose, R. Lindgren, E. McCullough, D. Meekins, R. Michaels, B. Moffit, G. G. Petratos, E. Piasetzky, X. Qian, Y. Qiang, I. Rodriguez, G. Ron, A. Saha, A. J. Sarty, B. Sawatzky, E. Schulte, R. Shneor, N. Sparveris, R. Subedi, S. Strauch, V. Sulkosky, Y. Wang, B. Wojtsekhowski, X. Yan, H. Yao, X. Zhan, X. Zheng

摘要:

本文研究了质子对通过γ +3 He-> p+p+n通道的高能光致衰变。从0.8到4.7 GeV的光子能量被用于运动学中,对应于具有高相对动量的质子对和接近静止的中子。首次观察到了由两核子光致蜕变组分计数规则所预言的截面的s-11标度。标度的开始是在一个较高的能量和截面是显着低于氘核(pn对)光致衰变。对于低于标度区域的光子能量,标度的截面被发现提出了一个强大的能量依赖性的结构中没有观察到的氘光致衰变。

英文摘要:

We present a study of high energy photodisintegration of proton-pairs through the gamma + 3He -> p+p+n channel. Photon energies from 0.8 to 4.7 GeV were used in kinematics corresponding to a proton pair with high relative momentum and a neutron nearly at rest. The s-11 scaling of the cross section, as predicted by the constituent counting rule for two nucleon photodisintegration, was observed for the first time. The onset of the scaling is at a higher energy and the cross section is significantly lower than for deuteron (pn pair) photodisintegration. For photon energies below the scaling region, the scaled cross section was found to present a strong energy-dependent structure not observed in deuteron photodisintegration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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