Following the recent measurement of several hadron yields by NA61/SHINE collaboration, the unified set of yields of particles produced in proton–proton collisions at = 17.3 GeV (laboratory beam momentum 158 GeV/c) is evaluated, combining the results of the NA49 and NA61/SHINE collaborations at the CERN SPS. With the statistical hadronization code Thermal-Fist we confirm the unacceptably high value of χ ², both in the canonical and grand canonical—strangeness canonical approach, and the common volume for all the hadrons. The use of the energy-dependent width of the Breit–Wigner parametrization for the mass distributions of unstable particles improves the quality of the description of particle yields only slightly. We confirm the observation that exclusion of the ϕ meson yield makes the fit result more reasonable. The complete experimental data set of particle yields can be also reasonably fitted if the canonical volumes of hadrons without and with open strangeness are allowed to vary independently. The canonical volume of strangeness was found to be larger than that for non-strange hadrons. The femtoscopy measurements with kaon pairs and pion pairs at 27.4, 63 and 900 GeV are not precise enough to confirm or reject this observation. The model with the best-fit parameters allows to predict the yields of several not yet measured particles emitted from p + p at = 17.3 GeV.

在最近通过 NA61/SHINE 合作测量了几个强子产率之后，评估了在= 17.3 GeV（实验室束动量 158 GeV/c）的质子 - 质子碰撞中产生的粒子产率的统一集，结合了 NA49 和CERN SPS 的 NA61/SHINE 合作。使用统计强子化代码 Thermal-Fist，我们在正则和大正则-奇异正则方法中以及所有强子的公共体积中确认了χ ^{2 的}高得令人无法接受。对于不稳定粒子的质量分布，使用 Breit-Wigner 参数化的能量相关宽度仅略微提高了粒子产率描述的质量。我们确认了排除ϕ的观察结果介子产率使拟合结果更加合理。如果允许没有和有开放奇异性的强子的规范体积独立变化，则粒子产率的完整实验数据集也可以合理地拟合。发现奇怪的规范体积大于非奇怪强子的规范体积。使用 27.4、63和 900 GeV的 kaon 对和 pion 对的飞秒测量不够精确，无法确认或拒绝这一观察结果。具有最佳拟合参数的模型可以预测从 p + p = 17.3 GeV发射的几个尚未测量的粒子的产率。