论文标题
研究在质子和细胞核上观察底部光增生性五角夸克共振的可能性，接近阈值
Study of a possibility of observation of hidden-bottom pentaquark resonances in bottomonium photoproduction on protons and nuclei near threshold
论文作者
论文摘要
我们研究$υ（1s）$梅森在质子和核上的$梅森质量增生量低于11.4 GEV（或在相应的光子实验室能量$e_γ$低于68.8 GEV）的质量中心能量。我们计算出$υ（1s）$ erson的非谐振和共振光增生的绝对激发函数，该质子在事件的光子实验室实验室能量（63---68 GEV）中，通过（$γp\ to $γp\ to {∂（1SS）} p $）和2-step（$γp\ top^qumγp\ to）（$γp\ t.1111130,11） \ to {υ（1s）} p $）$υ（1s）$生产渠道在不同的情况下，对于基本反应$γp\ to {υ（1s）} p $的非共振总横截面，以及腐烂$ p^+_ b（11080,11255,111113,1130）的分支比率。我们还计算了$^{12} $ c和$ qu {128} $ qu的$υ（1s）$ ers的相似函数，以及$^{208} $ pb target核在接近阈值的质量中心束能量区域9.0---11.4 Gev（通过考虑各自的incohent in Direct（$γn\ tos）（$γn\ to）（$γn\ to）（$γn\ to）（$γn）（$γn）（$γn）（1）） \至P^+_ b（11080,1125,11130）\ to {υ（1s）} p $，$γn\ to p^0_b（11080,1125,111130）\ to {∂（1S）} n $生产过程。我们表明，在未来的高度精确实验中，在拟议的高度精确实验中，对质子和核目标的$υ（1s）$的详细扫描在美国和中国在美国和中国的核目标中的核对范围近精确实验中，应给予或反对非biom $ perne $ perne $ perne+pe^$ p。 $ p_ {bi}^0 $（$ i = $ 1，2，3），并澄清其衰减率。
We study the $Υ(1S)$ meson photoproduction on protons and nuclei at the near-threshold center-of-mass energies below 11.4 GeV (or at the corresponding photon laboratory energies $E_γ$ below 68.8 GeV). We calculate the absolute excitation functions for the non-resonant and resonant photoproduction of $Υ(1S)$ mesons off protons at incident photon laboratory energies of 63--68 GeV by accounting for direct ($γp \to {Υ(1S)}p$) and two-step ($γp \to P^+_b(11080,11125,11130) \to {Υ(1S)}p$) $Υ(1S)$ production channels within different scenarios for the non-resonant total cross section of elementary reaction $γp \to {Υ(1S)}p$ and for branching ratios of the decays $P^+_b(11080,11125,11130) \to {Υ(1S)}p$. We also calculate an analogous functions for photoproduction of $Υ(1S)$ mesons on $^{12}$C and $^{208}$Pb target nuclei in the near-threshold center-of-mass beam energy region of 9.0--11.4 GeV by considering respective incoherent direct ($γN \to {Υ(1S)}N$) and two-step ($γp \to P^+_b(11080,11125,11130) \to {Υ(1S)}p$, $γn \to P^0_b(11080,11125,11130) \to {Υ(1S)}n$) $Υ(1S)$ production processes within a nuclear spectral function approach. We show that a detailed scan of the $Υ(1S)$ total photoproduction cross section on a proton and nuclear targets in the near-threshold energy region in future high-precision experiments at the proposed high-luminosity electron-ion colliders EIC and EicC in the U.S. and China should give a definite result for or against the existence of the non-strange hidden-bottom pentaquark states $P_{bi}^+$ and $P_{bi}^0$ ($i=$1, 2, 3) as well as clarify their decay rates.
