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arXiv 1602.06104nucl-ex
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氘核中大虚束缚质子的极化转移测量

Polarization-transfer measurement to a large-virtuality bound proton in the deuteron

A1 Collaboration, I. Yaron, D. Izraeli, P. Achenbach, H. Arenhövel, J. Beričič, R. Böhm, D. Bosnar, L. Debenjak, M. O. Distler, A. Esser, I. Friščić, R. Gilman,… 展开作者

A1 Collaboration, I. Yaron, D. Izraeli, P. Achenbach, H. Arenhövel, J. Beričič, R. Böhm, D. Bosnar, L. Debenjak, M. O. Distler, A. Esser, I. Friščić, R. Gilman, I. Korover, J. Lichtenstadt, H. Merkel, D. G. Middleton, M. Mihovilovič, U. Müller, E. Piasetzky, S. Širca, S. Strauch, J. Pochodzalla, G. Ron, B. S. Schlimme, M. Schoth, F. Schulz, C. Sfienti, M. Thiel, A. Tyukin, A. Weber

摘要:

自由质子和束缚质子之间可能存在的差异可以在极化转移组分的比率$P'_x/P'_z$中观察到。我们报告测量$P'_x/P'_z$,在$^2\textrm{H}(\vec{e},e^{\prime}\vec{p})n$反应在低和高缺失动量。观察到的$P'_x/P'_z$与自由质子的偏差随着虚拟性的增加而增加,与在\hefour中观察到的类似,表明核中的效应是由于敲除质子的虚拟性而不是由于平均核密度。与假设游离质子形状因子($\sim10\%$)的计算结果的实测差异可能表明培养基中存在修饰。

英文摘要:

Possible differences between free and bound protons may be observed in the ratio of polarization-transfer components, $P'_x/P'_z$. We report the measurement of $P'_x/P'_z$, in the $^2\textrm{H}(\vec{e},e^{\prime}\vec{p})n$ reaction at low and high missing momenta. Observed increasing deviation of $P'_x/P'_z$ from that of a free proton as a function of the virtuality, similar to that observed in \hefour, indicates that the effect in nuclei is due to the virtuality of the knock-out proton and not due to the average nuclear density. The measured differences from calculations assuming free-proton form factors ($\sim10\%$), may indicate in-medium modifications.

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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