|
|
Modern Physics 2024
未来正负电子对撞机中轻子超对称伴子寻找的预研
|
Abstract:
本文研究了在未来正负电子对撞机实验条件下，寻找轻子超对称伴子的物理分析预研。利用计算机产生的基于最小超对称模型和R宇称守恒假设的信号过程样本以及标准模型物理过程样本，并结合国际主流在研的正负电子对撞机的实验参数进行全模拟。结果表明，在考虑5%系统不确定性的前提下，正负电子对撞机可大幅提高现有实验对所研究超对称粒子的发现及排除限，验证了正负电子对撞机在寻找新物理方面的探测能力与前景，也为国际上正在筹备中的各类大型正负电子对撞机提供了重要的物理分析预研和参考。
This paper presents the pre-study of the physical analysis of the search for sleptons under the experimental conditions of future electron-positron colliders. Full simulations are performed by using computer-generated signal process samples based on the minimal supersymmetric standard model and the assumption of R-parity conservation, as well as standard model physics process samples, and combining them with the experimental parameters of mainstream international proposed electron-positron colliders. The results show that considering a 5% systematic uncertainty, the electron-positron colliders can significantly improve the existing experimental limits for the discovery and exclusion of the studied supersymmetric particles. This validates the electron-positron colliders’ capability and prospects in detecting new physics and provides important physical pre-study and reference for various large-scale electron-positron colliders that are being prepared internationally.
| [1] | Golfand, Y.A. and Likhtman, E.P. (1971) Extension of the Algebra of Poincare Group Generators and Violation of P Invariance. JETP Letters, 13, 323-326. |
| [2] | Wang, F., Wang, W., Yang, J., Zhang, Y. and Zhu, B. (2022) Low Energy Supersymmetry Confronted with Current Experiments: An Overview. Universe, 8, Article 178. https://doi.org/10.3390/universe8030178 |
| [3] | Baer, H., Barger, V., Sengupta, D., Salam, S. and Sinha, K. (2020) Status of Weak Scale Supersymmetry After LHC Run 2 and Ton-Scale Noble Liquid WIMP Searches. The European Physical Journal Special Topics, 229, 3085-3141. https://doi.org/10.1140/epjst/e2020-000020-x |
| [4] | Farrar, G.R. and Fayet, P. (1978) Phenomenology of the Production, Decay, and Detection of New Hadronic States Associated with Supersymmetry. Physics Letters B, 76, 575-579. https://doi.org/10.1016/0370-2693(78)90858-4 |
| [5] | Ellis, J., Hagelin, J.S., Nanopoulos, D.V., Olive, K. and Srednicki, M. (1984) Supersymmetric Relics from the Big Bang. Nuclear Physics B, 238, 453-476. https://doi.org/10.1016/0550-3213(84)90461-9 |
| [6] | ATLAS Collaboration (2020) Search for Direct Stau Production in Events with Two Hadronic τ-Leptons in = 13 TeV pp Collisions with the ATLAS Detector. Physical Review D, 101, Article ID: 032009. |
| [7] | CMS Collaboration (2023) Search for Direct Pair Production of Supersymmetric Partners of τ Leptons in the Final State with Two Hadronically Decaying τ Leptons and Missing Transverse Momentum in Proton-Proton Collisions at Formula Presented. Physical Review D, 108, Article ID: 012011. |
| [8] | Berggren, M. (2001) Stau Searches at LEP. Nuclear Physics B—Proceedings Supplements, 98, 342-347. https://doi.org/10.1016/s0920-5632(01)01247-6 |
| [9] | Ruan, M., Zhao, H., Li, G., Fu, C., Wang, Z., Lou, X., et al. (2018) Reconstruction of Physics Objects at the Circular Electron Positron Collider with Arbor. The European Physical Journal C, 78, Article No. 426. https://doi.org/10.1140/epjc/s10052-018-5876-z |
| [10] | Behnke, T., et al. (2013) The International Linear Collider Technical Design Report—Volume 1: Executive Summary. arXiv :1306.6327. |
| [11] | Biçer, M., et al. (2014) First Look at the Physics Case of TLEP. arXiv: 1308.6176. |
| [12] | Lou, X. (2019) The Circular Electron Positron Collider. Nature Reviews Physics, 1, 232-234. https://doi.org/10.1038/s42254-019-0047-1 |
| [13] | Ahmad, M., et al. 2018) CEPC Conceptual Design Report: Volume 2—Physics & Detector. arXiv: 1811.10545. |
| [14] | Kilian, W., Ohl, T. and Reuter, J. (2011) Whizard—Simulating Multi-Particle Processes at LHC and ILC. The European Physical Journal C, 71, Article No. 1742. https://doi.org/10.1140/epjc/s10052-011-1742-y |
| [15] | Mora de Freitas, P. and Videau, H. (2002) Detector Simulation with MOKKA/GEANT4: Present and Future. Proceedings of International Workshop on Linear Colliders (LCWS 2002), Seogwipo, 26-30 August 2002, 623-627. |
| [16] | Gaede, F., Aplin, S., Glattauer, R., Rosemann, C. and Voutsinas, G. (2014) Track Reconstruction at the ILC: The ILD Tracking Software. Journal of Physics: Conference Series, 513, Article ID: 022011. https://doi.org/10.1088/1742-6596/513/2/022011 |
| [17] | ATLAS Collaboration (2017) Measurement of the Tau Lepton Reconstruction and Identification Performance in the ATLAS Experiment Using pp Collisions at = 13 TeV. ATLAS-CONF-2017-029. https://cds.cern.ch/record/2261772 |
| [18] | Read, A.L. (2002) Presentation of Search Results: The CLs Technique. Journal of Physics G: Nuclear and Particle Physics, 28, 2693-2704. https://doi.org/10.1088/0954-3899/28/10/313 |
