论文标题
伪尺度和标量梅森光生源用regge现象学解释
Pseudoscalar and Scalar Meson Photoproduction Interpreted by Regge Phenomenology
论文作者
论文摘要
我们已经评估了$ \vecγp\toπ^0p $和$ \vecγp\ to a_0^0p $上方和雷格现象学之内的a_0^0p $的伪尺度和标量中性PION光生生产。我们的合身性，包括gluex $σ$ pseudoscalar光增生性数据，表明，以前的SLAC $σ$测量值$ \ \vecγp\toπ^0p $上方$e_γ= 4〜 \ mathrm {gev} $与SLAC的差异有所不同，该数据与gluex in vicin $ e_d. 9〜9〜9〜slac in viceev in viceev in vicage in vicagem in More近期数据。 Regge模型预测，标量介子的光束极化不对称$σ$与伪级介孔光生孕产物相反，但是，横截面相似。虽然在这两种情况下，载体自然奇偶元交易所都占主导地位，但伪伏源不自然的平等媒介交换的贡献很小。 Using Regge phenomenology, we predicted high energy behavior for double polarized observables $\mathbb{E}$, $\mathbb{F}$, $\mathbb{G}$, and $\mathbb{H}$ for the reactions $γp\to π^0p$ and $γp\to a_0^0p$.
We have evaluated pseudoscalar and scalar neutral pion photoproduction in $\vecγp\toπ^0p$ and $\vecγp\to a_0^0p$ above the resonance region and within Regge phenomenology. Our fit, including GlueX $Σ$ pseudoscalar photoproduction data, shows that previous SLAC $Σ$ measurements for $\vecγp \to π^0p$ above $E_γ= 4~\mathrm{GeV}$ are at variance with SLAC data with more recent measurements made by GlueX in vicinity of $E_γ= 9~\mathrm{GeV}$. The Regge model predicts that the beam polarization asymmetry $Σ$ of the scalar meson is opposite to that of pseudoscalar meson photoproduction, however, the cross sections are similar. While the vector natural parity meson exchange is dominant in both cases, the contribution of the pseudovector unnatural parity meson exchange is very small. Using Regge phenomenology, we predicted high energy behavior for double polarized observables $\mathbb{E}$, $\mathbb{F}$, $\mathbb{G}$, and $\mathbb{H}$ for the reactions $γp\to π^0p$ and $γp\to a_0^0p$.
