Measurement of the $e^+e^-\toπ^+π^-π^0$ cross section in the energy region from 0.56 to 1.1 GeV with the SND detector
Budker Institute of Nuclear Physics, SB RAS（布德克尔核物理研究所，俄罗斯科学院西伯利亚分院）；Novosibirsk State University（新西伯利亚国立大学）
SND Collaboration, M. N. Achasov, A. E. Alizzi, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, V. S. Deni… 展开作者
SND Collaboration, M. N. Achasov, A. E. Alizzi, A. Yu. Barnyakov, K. I. Beloborodov, A. V. Berdyugin, D. E. Berkaev, A. G. Bogdanchikov, A. A. Botov, V. S. Denisov, T. V. Dimova, V. P. Druzhinin, R. A. Efremov, E. A. Eminov, L. B. Fomin, L. V. Kardapoltsev, A. A. Kattsin, A. G. Kharlamov, I. A. Koop, A. A. Korol, D. P. Kovrizhin, A. S. Kupich, A. P. Kryukov, N. A. Melnikova, N. Yu. Muchnoi, A. E. Obrazovsky, A. A. Oorzhak, I. V. Ovtin, E. V. Pakhtusova, E. A. Perevedentsev, I. A. Polomoshnov, K. V. Pugachev, Yu. A. Rogovsky, V. A. Romanov, S. I. Serednyakov, Yu. M. Shatunov, D. A. Shtol, Z. K. Silagadze, K. D. Sungurov, M. V. Timoshenko, I. K. Surin, Yu. V. Usov, I. M. Zemlyansky, V. N. Zhabin, Yu. M. Zharinov, V. V. Zhulanov, P. V. Zhulanova
The precise measurement of the $e^+e^-\toπ^+π^-π^0$ cross section is performed in the center-of-mass energy range $E = 560$--1100 MeV using a data sample of 66 pb$^{-1}$ collected in the experiment with the SND detector at the VEPP-2000 $e^+e^-$ collider. The systematic uncertainty of the cross section measurement is 0.9\% at the maximum of the $ω$ resonance and 1.2\% at the maximum of the $ϕ$ resonance. The leading-order hadronic contribution to the muon magnetic anomaly calculated using the $e^+e^-\toπ^+π^-π^0$ cross section measured by SND from 0.62 to 1.975 GeV is $(45.95\pm0.06\pm 0.47)\times 10^{-10}$. From the fit to the cross section data with the vector meson dominance model, the parameters of the $ω$, $ρ$, and $ϕ$ resonances are obtained. The obtained values of ${\cal B}(ω\to e^+e^-) {\cal B}(ω\to 3π)$, mass and width of the $ω$ meson, and ${\cal B}(ρ\to 3π)$ have accuracy better than the current world average values.
Measurement of the e+e- -> K+K- cross section in the energy range s**(1/2) = 1.04 - 1.38 GeV with the SND detector in the experiment at the VEPP-2M e+e- collider
在VEPP-2 M $e^+e^-$对撞机上进行的SND实验中，在能量范围$\sqrt{s}$ = 1.04- 1.38 GeV内测量了过程$e^+e^- \to K^+K^-$的截面。测量的截面用矢量介子占优势的模型来描述，该模型考虑了轻矢量介子$ρ$、$ω$、$ϕ$及其最低激发态的贡献.测量的平均统计准确度为4.4%，系统不确定度为5.2%。
New results on e+e- -> hadrons exclusive cross sections from experiments with SND detector at VEPP-2M e+e- collider in the energy range sqrt(s)=0.4-1.4 GeV
给出了e+e-> pi+pi-，K+K-，K_SK_L，pi_0/γ，eta_0/γ过程截面测量的新结果。这些结果是基于1995-2000年间VEPP-2 M e+e对撞机SND探测器在sqrt（s）=0.4-1.4 GeV能量范围内积累的30 pb^-1数据。与现有实验数据的比较表明，测量精度接近或优于世界平均水平。对于e+e-> pi+pi-过程，精度约为0.01。这对计算强子对μ子反常磁矩的贡献是重要的。
Study of e+e- --> omega pi0 --> pi0 pi0 gamma in the energy range 1.05--2.00 GeV with SND
在1.05- 2.00 GeV能量范围内，测量了e+e-> omega pi 0--> pi 0 pi 0 γ过程的截面。实验是在VEPP-2000电子对撞机上用SND探测器进行的.测得的1.4 GeV以上的e+e-> omega pi 0截面是迄今为止最精确的。在1.4 GeV以下，我们的数据与以前的SND和CMD-2测量结果吻合得很好。e+e-> omega pi 0截面的数据很好地描述了VMD模型与两个激发的rho-like状态。从测量的截面中，我们提取了γ ^* --> ω π 0跃迁形状因子。发现VDM模型不能同时描述我们的数据和从ω-> pi 0 μ + μ衰变得到的数据。我们还测试了CVC假设，将我们在e+e-> omega pi 0截面上的结果与在tau-> omega pi- nu_{tau}衰变上的数据进行比较。
Measurement of the $e^+e^- \to ηπ^+π^-$ cross section in the center-of-mass energy range 1.22--2.00 GeV with the SND detector at the VEPP-2000 collider
Measurement of the $e^+e^- \toπ^+π^- $ process cross section with the SND detector at the VEPP-2000 collider in the energy region $0.525<\sqrt{s}<0.883$ GeV
本文介绍了在VEPP-2 M $e^+e^-$对撞机上进行的$2E_0=0.4-1.4$ GeV能区SND探测器实验的现状。分析$ϕ$衰变为$π^0π^0γ$、$ηπ^0γ$的新结果是基于对应于2000万个$ϕ$衰变的完整SND统计。本文介绍了对$ω\toπ^0π^0γ$衰变的新测量和对$ρ\toπ^0π^0γ$的首次观测。光矢量介子的许多其他罕见衰变的准确性得到了提高。在能量范围$2E_0=1.0\div1.4$ GeV的过程$e^+e^-\toωπ^0$和$e^+e^-\toπ^+π^-π^0$的截面进行了测量。对数据拟合的结果进行了讨论。
Institute of Physics, EPFL（洛桑联邦理工学院物理研究所）；Hamburg University（汉堡大学）；European Organization for Nuclear Research (CERN)（欧洲核子研究组织（CERN））；Laboratory of Instrumentation and Experimental Particle Physics (LIP)（仪器与实验粒子物理实验室（LIP））；University of Leiden（莱顿大学）；Taras Shevchenko National University of Kyiv（基辅塔拉斯舍甫琴科国立大学）；University College London（伦敦大学学院）；Sungkyunkwan University（成均馆大学）；Middle East Technical University (METU)（中东理工大学（METU））；Pontifical Catholic University of Chile（智利天主教 Pontifical 大学）；Imperial College London（帝国理工学院伦敦）；Millennium Institute for Subatomic physics at high energy frontier-SAPHIR（高能前沿亚原子物理千年研究所-SAPHIR）；Gyeongsang National University（庆尚国立大学）；Gwangju National University of Education（光州国立教育大学）；Nagoya University（名古屋大学）；Korea University（高丽大学）；Toho University（东海大学）；Niels Bohr Institute（尼尔斯·玻尔研究所）；Constructor University（Constructor 大学）；Chulalongkorn University（朱拉隆功大学）；Chiang Mai University（清迈大学）；Pakistan Institute of Nuclear Science and Technology (PINSTECH)（巴基斯坦核科学与技术研究所（PINSTECH））；Atilim University（阿提利姆大学）；Pegaso University（佩加索大学）；Laboratori Nazionali del Gran Sasso（格兰萨索国家实验室）
Institute for Nuclear Research of the Russian Academy of Sciences（俄罗斯科学院核物理研究所）；I.E. Tamm Department of Theoretical Physics, Lebedev Physical Institute（列别杰夫物理研究所伊.E.塔姆理论物理系）
Measurement of the muon neutrino charged-current cross section with SND@LHC
European Organization for Nuclear Research (CERN)（欧洲核子研究中心）；Pakistan Institute of Nuclear Science and Technology (PINSTECH)（巴基斯坦核科学与技术研究所）；Sezione INFN di Napoli（那不勒斯INFN分部）；Università di Napoli “Federico II”（那不勒斯费德里科二世大学）；Institute of Physics, EPFL（洛桑联邦理工学院物理研究所）；Department of Physics, Faculty of Science, Chulalongkorn University（朱拉隆功大学理学院物理系）；Millennium Institute for Subatomic physics at high energy frontier-SAPHIR（高能前沿亚原子物理学千年研究所-SAPHIR）；Center for Theoretical and Experimental Particle Physics, Facultad de Ciencias Exactas, Universidad Andrès Bello（安德烈斯贝罗大学精确科学学院理论实验粒子物理中心）
利用SND@LHC实验电子探测器，基于LHC Run 3的68.6 fb^{-1}质子-质子碰撞数据，测量了钨靶上缪子中微子带电电流相互作用截面，得到中微子能量中位数228 GeV下的截面为(37^{+24}_{-12})×10^{-35} cm^2。
Cross-Sections of Large-Angle Hadron Production in Proton- and Pion-Nucleus Interactions V: Lead Nuclei and Beam Momenta from +/-3 Gev/c to +/-15 Gev/c
Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions II: beryllium nuclei and beam momenta from +/- 3 GeV/c to +/-15 GeV/c
Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions IV: Copper nuclei and beam momenta from +/-3 GeV/c to +/-15 GeV/c
Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions VII: tin nuclei and beam momenta from \pm3 GeV/c to \pm15 GeV/c
Cross-sections of large-angle hadron production in proton-- and pion--nucleus interactions VIII: aluminium nuclei and beam momenta from {\pm}3 GeV/c to {\pm}15 GeV/c
Cross-sections of large-angle hadron production in proton- and pion-nucleus interactions VI: carbon nuclei and beam momenta from \pm 3 GeV/c to \pm 15 GeV/c
Experimental study of the e+e- -> pi0 gamma process in the energy region sqrt(s)=0.60-0.97 GeV
本文介绍了在VEPP-2 M对撞机上用SND探测器研究e+e-> pi 0 γ过程的结果。能量范围sqrt（s）=0.60- 0.97GeV。使用36513个选定的事件，对应于3.4 pb^-1的总积分亮度，测量e+e--> pi 0伽马截面。在矢量介子占优模型的框架下分析了截面的能量依赖性。这些数据可以很好地描述为phi、omega、rho 0-> pi 0 γ衰变贡献之和与测量的衰变概率：Br（omega-> pi 0 γ）=（9.34+-0.15+-0.31）%和Br（rho 0-> pi 0 γ）=（5.15+-1.16+-0.73）*10^-4。ρ-ω相对干涉相位为φ（ρ，ω）=（-10.2+-6.5+-2.5）度。
