Abstract

Preliminary results of measurement of the cross section for the process \(e^{+}e^{-}\to K^{+}K^{-}\) in the range of c.m. energies between 1.075 and 1.975 GeV are presented. An analysis was performed on the basis of an integrated luminosity of 62.9 pb\({}^{-1}\) accumulated by employing the CMD-3 detector within the experimental runs of 2019. The suppression of the background from the processes \(e^{+}e^{-}\to e^{+}e^{-}(\gamma)\), \(\mu^{+}\mu^{-}(\gamma)\), and \(\pi^{+}\pi^{-}(\gamma)\) and the background of cosmic-ray muons was accomplished with the aid of information about specific energy losses of charged particles in the layers of the liquid xenon calorimeter of the CMD-3 detector. The preliminary results of the present measurement of the \(e^{+}e^{-}\to K^{+}K^{-}\) cross section are in reasonable agreement with the results of earlier measurements and have a commensurate statistical precision.

中文翻译：

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使用CMD-3检测器测量过程$$ \ boldsymbol {e ^ {+} e ^ {-} \至K ^ {+} K ^ {-}} $$的横截面，使用CMD-3检测器

摘要

给出了测量过程\（e ^ {+} e ^ {-} \至K ^ {+} K ^ {-} \）在1.075和1.975 GeV之间的cm能量范围内的横截面的初步结果。。通过使用CMD-3检测器在2019年的实验运行中累积的62.9 pb \（{} ^ {-1} \）累积光度进行了分析。 e ^ {+} e ^ {-} \至e ^ {+} e ^ {-}（\ gamma）\），\（\ mu ^ {+} \ mu ^ {-}（\ gamma）\），和\（\ pi ^ {+} \ pi ^ {-}（\ gamma）\）宇宙射线μ子的背景是借助有关CMD-3探测器的液体氙量热计各层中带电粒子比能量损失的信息来完成的。\（e ^ {+} e ^ {-} \至K ^ {+} K ^ {-} \）横截面的当前测量的初步结果与早期测量的结果合理吻合，并且具有相应的统计精度。