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类空动量转移平方有限值下质子电形状因子的零点

Zero of the proton electric form factor in the finite value of the spacelike momentum transfer squared

Erik Bartoš, Stanislav Dubnička, Noel Vincze, Andrej Liptaj, Anna Zuzana Dubničková

arXiv 2607.18307首次发表:更新:

AI 中文总结

研究质子电形状因子\(G^p_E(t)\)在类空动量转移平方有限值处是否存在零点。通过重新研究杰斐逊实验室实验数据,给出该零点可能存在的确切论据,反驳了近期两篇否定该零点存在的论文观点。

AI 中文摘要

在杰斐逊实验室实验中,采用阿基耶泽尔 - 雷卡洛极化方法获得的直至\(t = -8.5\) GeV²的\(\mu_p(G^p_E(t)/G^p_M(t))\)极化数据呈现下降趋势,暗示质子电形状因子\(G^p_E(t)\)在类空动量转移平方有限值处可能存在零点。近期两篇论文对此数据研究后否定了该零点的存在。本文重新研究给出了该零点可能存在的确切论据。

英文摘要

The behavior of the polarization data on $μ_p(G^p_E(t)/G^p_M(t))$ ratio, at the present day available up to $t=-8.5$ GeV$^2$, obtained in the Jefferson Lab experiments carried out by the Akhiezer-Rekalo polarization method, has a decreasing tendency, indicating possible existence of a zero of the proton electric form factor $G^p_E(t)$ in the finite spacelike momentum transfer squared value. However, recently appeared two papers, investigating these data, one of them including also other existing data on the nucleon electromagnetic structure in the spacelike and timelike regions, in which an existence of such zero is disproved. Nevertheless, reinvestigations we provide in this paper give clear arguments for the possible existence of such a zero.

Comments15 pages, 1 figure, 2 tables

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