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arXiv 0906.4945hep-ex
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从$ρ^0$介子光生数据的整体拟合中提取Pomeron轨迹

Extraction of the Pomeron Trajectory from a Global Fit to Exclusive $ρ^0$ Meson Photoproduction Data

Benno List

备注：
6 pages, 2 figures, to appear in the proceedings of the XVII International Workshop on Deep Inelastic Scattering and Related Subjects DIS 2009, Madrid, Spain, April 26-30, 2009
发表信息：
Progress in High Energy Physics, Vol. 3 (2009)
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摘要：

基于弹性$ρ^0$光生的H1，欧米茄和ZEUS合作的数据，已进行了拟合，以提取值$α_P (t)$的pomeron轨迹在固定值的t从W依赖的差分$γp$横截面$d σ_{γp} (W) / d t$。拟合中使用的数据涵盖了$γp$质心能量中的$8.3 \le W \le 94 GeV$和动量传递中的$0.01 \le |t| \le 0.95 GeV^2$的范围。对$α_P (t)$的结果值进行线性拟合，得到坡密子轨迹截距的$α_{P,0} =1.0871 \pm 0.0026 (stat.) \pm 0.0030 (syst.)$和斜率的$α'_P = 0.126 \pm 0.013 (stat.) \pm 0.012 (syst.) GeV^{-2}$。这些数据也与Donnachie-Landshoff轨迹$α_P (t) = 1.0808 + 0.25 GeV^{-2}\cdot t$在低的值$|t| \lesssim 0.3 GeV^2$和一个恒定的值$α_P (t)$在较大的值$|t|$兼容。

英文摘要：

Based on data on elastic $ρ^0$ photoproduction from the H1, Omega and ZEUS collaborations, a fit has been performed to extract the value $α_P (t)$ of the pomeron trajectory at fixed values of t from the W dependence of the differential $γp$ cross section $d σ_{γp} (W) / d t$. The data used in the fit cover the range of $8.3 \le W \le 94 GeV$ in $γp$ centre-of-mass energy and $0.01 \le |t| \le 0.95 GeV^2$ in momentum transfer. A linear fit to the resulting values of $α_P (t)$ yields $α_{P,0} =1.0871 \pm 0.0026 (stat.) \pm 0.0030 (syst.)$ for the intercept and $α'_P = 0.126 \pm 0.013 (stat.) \pm 0.012 (syst.) GeV^{-2}$ for the slope of the pomeron trajectory. The data are also compatible with the Donnachie-Landshoff trajectory $α_P (t) = 1.0808 + 0.25 GeV^{-2}\cdot t$ at low values $|t| \lesssim 0.3 GeV^2$ and with a constant value of $α_P (t)$ at larger values of $|t|$.

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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