Study of Σ(1385) and Ξ(1321) hyperon and antihyperon production in deep inelastic muon scattering
C. Adolph, M. Alekseev, V. Yu. Alexakhin, Yu. Alexandrov, G. D. Alexeev, A. Amoroso, A. Austregesilo, B. Badelek, F. Balestra, J. Barth, G. Baum, Y. Bedfer, A. … 展开作者
C. Adolph, M. Alekseev, V. Yu. Alexakhin, Yu. Alexandrov, G. D. Alexeev, A. Amoroso, A. Austregesilo, B. Badelek, F. Balestra, J. Barth, G. Baum, Y. Bedfer, A. Berlin, J. Bernhard, R. Bertini, K. Bicker, J. Bieling, R. Birsa, J. Bisplinghoff, P. Bordalo, F. Bradamante, C. Braun, A. Bravar, A. Bressan, M. Buechele, E. Burtin, L. Capozza, M. Chiosso, S. U. Chung, A. Cicuttin, M. L. Crespo, S. Dalla Torre, S. S. Dasgupta, S. Dasgupta, O. Yu. Denisov, S. V. Donskov, N. Doshita, V. Duic, W. Duennweber, M. Dziewiecki, A. Efremov, C. Elia, P. D. Eversheim, W. Eyrich, M. Faessler, A. Ferrero, A. Filin, M. Finger, M. Finger, H. Fischer, C. Franco, N. du Fresne von Hohenesche, J. M. Friedrich, V. Frolov, R. Garfagnini, F. Gautheron, O. P. Gavrichtchouk, S. Gerassimov, R. Geyer, M. Giorgi, I. Gnesi, B. Gobbo, S. Goertz, S. Grabmueller, A. Grasso, B. Grube, R. Gushterski, A. Guskov, T. Guthoerl, F. Haas, D. von Harrach, F. H. Heinsius, F. Herrmann, C. Hess, F. Hinterberger, Ch. Hoeppner, N. Horikawa, N. d'Hose, S. Huber, S. Ishimoto, Yu. Ivanshin, T. Iwata, R. Jahn, V. Jary, P. Jasinski, R. Joosten, E. Kabuss, D. Kang, B. Ketzer, G. V. Khaustov, Yu. A. Khokhlov, Yu. Kisselev, F. Klein, K. Klimaszewski, J. H. Koivuniemi, V. N. Kolosov, K. Kondo, K. Koenigsmann, I. Konorov, V. F. Konstantinov, A. M. Kotzinian, O. Kouznetsov, M. Kraemer, Z. V. Kroumchtein, N. Kuchinski, F. Kunne, K. Kurek, R. P. Kurjata, A. A. Lednev, A. Lehmann, S. Levorato, J. Lichtenstadt, A. Maggiora, A. Magnon, N. Makke, G. K. Mallot, A. Mann, C. Marchand, A. Martin, J. Marzec, H. Matsuda, T. Matsuda, G. Meshcheryakov, W. Meyer, T. Michigami, Yu. V. Mikhailov, Y. Miyachi, A. Morreale, A. Nagaytsev, T. Nagel, F. Nerling, S. Neubert, D. Neyret, V. I. Nikolaenko, J. Novy, W. -D. Nowak, A. S. Nunes, A. G. Olshevsky, M. Ostrick, R. Panknin, D. Panzieri, B. Parsamyan, S. Paul, G. Piragino, S. Platchkov, J. Pochodzalla, J. Polak, V. A. Polyakov, J. Pretz, M. Quaresma, C. Quintans, S. Ramos, G. Reicherz, E. Rocco, V. Rodionov, E. Rondio, N. S. Rossiyskaya, D. I. Ryabchikov, V. D. Samoylenko, A. Sandacz, M. G. Sapozhnikov, S. Sarkar, I. A. Savin, G. Sbrizzai, P. Schiavon, C. Schill, T. Schlueter, A. Schmidt, K. Schmidt, L. Schmitt, H. Schmieden, K. Schoenning, S. Schopferer, M. Schott, O. Yu. Shevchenko, L. Silva, L. Sinha, S. Sirtl, S. Sosio, F. Sozzi, A. Srnka, L. Steiger, M. Stolarski, M. Sulc, R. Sulej, H. Suzuki, P. Sznajder, S. Takekawa, J. Ter Wolbeek, S. Tessaro, F. Tessarotto, F. Thibaud, S. Uhl, I. Uman, M. Vandenbroucke, M. Virius, L. Wang, T. Weisrock, M. Wilfert, R. Windmolders, W. Wislicki, H. Wollny, K. Zaremba, M. Zavertyaev, E. Zemlyanichkina, N. Zhuravlev, M. Ziembicki
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13 pages, 4 figures and 3 tables, 1 Appendix with 3 figures. Version accepted by the Editor
Large samples of Λ, Σ(1385) and Ξ(1321) hyperons produced in deep-inelastic muon scattering off a ^6LiD target were collected with the COMPASS experimental setup at CERN. The relative yields of Σ(1385)^+, Σ(1385)^-, \barΣ(1385)^-, \barΣ(1385)^+, Ξ(1321)^-, and \barΞ(1321)^+ hyperons decaying into Λ(\barΛ)πwere measured. The heavy hyperon to Λand heavy antihyperon to \barΛ yield ratios were found to be in the range 3.8% to 5.6% with a relative uncertainty of about 10%. They were used to tune the parameters relevant for strange particle production of the LEPTO Monte Carlo generator.
Tests of CP symmetry in entangled hyperon anti-hyperon pairs at BESIII
Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）；University of Chinese Academy of Sciences（中国科学院大学）；Uppsala University（乌普萨拉大学）；National Centre for Nuclear Research（波兰国家核子研究中心）；INFN Sezione di Perugia（意大利国家核物理研究院佩鲁加分部）；Università di Perugia（佩鲁贾大学）；Lanzhou University（兰州大学）；Institute of Physics, Henan Academy of Sciences（河南省科学院物理研究所）
Sigma-antihyperon correlations in Z0 decay and investigation of the baryon production mechanism
利用LEP e ~+对撞机OPAL实验在sqrt{s}=91 GeV附近收集的数据，研究了重子的形成机制.作为签名，其重子数被补偿的σ-，λ-或Xi-反超子的产生的分数的σ-超子确定。该方法完全依赖于重子的量子数相关性，而不是快度相关性，这使得它比以前的研究更独立于模型。没有爆米花机制的双夸克碎裂模型是强烈不赞成的3.8标准偏差的显着性，包括系统的不确定性。结果表明，以前的研究爆米花机制是不确定的，如果考虑参数的不确定性。
Exploring the N$Λ$-N$Σ$ coupled system with high precision correlation techniques at the LHC
$Λ$和$Σ$超子（Y）与核子（N）的相互作用强烈地受到耦合道动力学的影响。由于$\rm N Λ$和$\rm N Σ$系统的质量差异很小，因此$\rm N Σ\leftrightarrow N Λ$过程的相当大的耦合强度构成了确定N-$Λ$相互作用的关键因素。在这封信中，我们提出了最精确的测量上的相互作用的p $Λ$对，从零相对动量的$\rm N Σ$通道的开放。本文报道了在LHC上测量的$\sqrt{s}~=~13$ TeV高多重数触发pp碰撞中的$\mathrm{p}Λ\oplus\overline{\mathrm{p}}\overlineΛ$对在相对动量空间中的关联函数。非弹性N $Σ$通道的开口在提取的相关函数中是可见的，作为在相对动量$k^{*}$ = 289 MeV/ $c$处发生的尖状结构。这代表了在p $Λ$系统中对$\rm N Σ\rightarrow N Λ$耦合通道的第一次直接实验观察。的相关函数进行了比较，最近的手征有效场理论计算，根据不同的强度的$\rm N Σ\leftrightarrow N Λ$过渡势。一个较弱的耦合，可能支持目前的测量，将需要一个更排斥的三体NN $Λ$相互作用的$Λ$在介质中的属性，这对核状态方程和中子星内部超子的存在有影响的适当描述。
The feasibility of single $Λ$ production via ${\ell}^{-}$ $+$ $p$ ${\to}$ $Λ$ $+$ $ν_{\ell}$ at $e^{+}e^{-}$ colliders
School of Physics, Henan Normal University（河南师范大学物理学院）；Institute of High Energy Physics, Chinese Academy of Sciences（中国科学院高能物理研究所）；University of Chinese Academy of Sciences（中国科学院大学）；Center for High Energy Physics, Henan Academy of Sciences（河南省科学院高能物理中心）
