Measurement of the Cross Section of the \({e^{+}e^{-}\to}\) hadrons Reaction in the Energy Region \({\sqrt{s}=1.8{-}2.00}\) GeV with the SND Detector at the VEPP-2000 Collider

IF 0.5 4区物理与天体物理 Q4 PHYSICS, NUCLEAR

Physics of Atomic Nuclei Pub Date : 2026-05-24 DOI:10.1134/S1063778826600107

M. N. Achasov, K. I. Beloborodov, A. V. Berdyugin, A. G. Bogdanchikov, A. A. Botov, T. V. Dimova, V. P. Druzhinin, L. V. Kardapoltsev, A. G. Kharlamov, A. A. Korol, D. P. Kovrizhin, A. P. Kryukov, A. S. Kupich, N. A. Melnikova, N. Yu. Muchnoj, A. E. Obrazovsky, E. V. Pakhtusova, K. V. Pugachev, S. I. Serednyakov, Z. K. Silagadze, D. A. Shtol, I. K. Surin, V. N. Zhabin

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Abstract

The inclusive cross section of \(e^{+}e^{-}\)-annihilation to hadronic states with charged particles, excluding two-particle states is preliminary measured in this work. Measurement is done in the energy range 1.8–2.0 GeV in the center of mass system with the SND detector on VEPP-2000 collider. The total hadronic cross section is obtained by adding exclusive cross sections of \(e^{+}e^{-}\)-annihilation to hadronic states with neutral particles only and states with two charged particles to the measured inclusive cross section. The resulting cross section is systematically greater than sum of exclusive cross sections, compatible with previous measurements of inclusive cross section and has much greater statistical accuracy.

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用SND探测器在VEPP-2000对撞机上测量\({\sqrt{s}=1.8{-}2.00}\) GeV能量区\({e^{+}e^{-}\to}\)强子反应截面

本文初步测量了\(e^{+}e^{-}\) -湮没到带电粒子的强子态，不包括双粒子态的包涵截面。在VEPP-2000对撞机上用SND探测器对质心系统1.8 ～ 2.0 GeV的能量范围进行了测量。总强子截面是通过在测量的包含截面上加入含有中性粒子的强子态和含有两个带电粒子的强子态的\(e^{+}e^{-}\) -湮灭的独占截面得到的。所得截面系统地大于排他截面之和，与以往的包括截面测量结果相一致，具有更高的统计精度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physics of Atomic Nuclei 物理-物理：核物理

CiteScore

0.60

自引率

25.00%

发文量

审稿时长

3-6 weeks

期刊介绍： Physics of Atomic Nuclei is a journal that covers experimental and theoretical studies of nuclear physics: nuclear structure, spectra, and properties; radiation, fission, and nuclear reactions induced by photons, leptons, hadrons, and nuclei; fundamental interactions and symmetries; hadrons (with light, strange, charm, and bottom quarks); particle collisions at high and superhigh energies; gauge and unified quantum field theories, quark models, supersymmetry and supergravity, astrophysics and cosmology.