Physics with the KLOE-2 experiment at the upgraded DA$ϕ$NE
G. Amelino-Camelia, F. Archilli, D. Babusci, D. Badoni, G. Bencivenni, J. Bernabeu, R. A. Bertlmann, D. R. Boito, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Bra… 展开作者
G. Amelino-Camelia, F. Archilli, D. Babusci, D. Badoni, G. Bencivenni, J. Bernabeu, R. A. Bertlmann, D. R. Boito, C. Bini, C. Bloise, V. Bocci, F. Bossi, P. Branchini, A. Budano, S. A. Bulychjev, P. Campana, G. Capon, F. Ceradini, P. Ciambrone, E. Czerwinski, H. Czyz, G. D'Ambrosio, E. Dané, E. De Lucia, G. De Robertis, A. De Santis, P. De Simone, G. De Zorzi, A. Di Domenico, C. Di Donato, B. Di Micco, D. Domenici, S. I. Eidelman, O. Erriquez, R. Escribano, R. Essig, G. V. Fedotovich, G. Felici, S. Fiore, P. Franzini, P. Gauzzi, F. Giacosa, S. Giovannella, F. Gonnella, E. Graziani, F. Happacher, B. C. Hiesmayr, B. Höistad, E. Iarocci, S. Ivashyn, M. Jacewicz, F. Jegerlehner, T. Johansson, J. Lee-Franzini, W. Kluge, V. V. Kulikov, A. Kupsc, R. Lehnert, F. Loddo, P. Lukin, M. A. Martemianov, M. Martini, M. A. Matsyuk, N. E. Mavromatos, F. Mescia, R. Messi, S. Miscetti, G. Morello, D. Moricciani, P. Moskal, S. Müller, F. Nguyen, E. Passemar, M. Passera, A. Passeri, V. Patera, M. R. Pennington, J. Prades, L. Quintieri, A. Ranieri, M. Reece, P. Santangelo, S. Sarkar, I. Sarra, M. Schioppa, P. C. Schuster, B. Sciascia, A. Sciubba, M. Silarski, C. Taccini, N. Toro, L. Tortora, G. Venanzoni, R. Versaci, L. -T. Wang, W. Wislicki, M. Wolke, J. Zdebik
备注:
60 pages, 41 figures; added affiliation for one of the authors; added reference to section 6
Investigation at a $ϕ$--factory can shed light on several debated issues in particle physics. We discuss: i) recent theoretical development and experimental progress in kaon physics relevant for the Standard Model tests in the flavor sector, ii) the sensitivity we can reach in probing CPT and Quantum Mechanics from time evolution of entangled kaon states, iii) the interest for improving on the present measurements of non-leptonic and radiative decays of kaons and eta/eta$^\prime$ mesons, iv) the contribution to understand the nature of light scalar mesons, and v) the opportunity to search for narrow di-lepton resonances suggested by recent models proposing a hidden dark-matter sector. We also report on the $e^+ e^-$ physics in the continuum with the measurements of (multi)hadronic cross sections and the study of gamma gamma processes.
Improved $K_S$ tagging procedure and its impact on physics at KLOE-2
在DA $Φ$ NE $ϕ$工厂进行的KLOE实验对带电和中性K介子物理、低能QCD以及CP和CPT不变性进行了精确的研究。在新的运行中,KLOE通过为$γγ$物理学、内部跟踪室和最终聚焦区域的两个量热计添加新的标记系统进行了升级。我们也在改进K介子的识别技术,特别是$K_S$介子标记的算法。在这篇文章中,我们讨论的影响,改进的标记程序的$K_S$衰变的研究。
DA $Φ$ NE $ϕ$ -工厂的KLOE探测器在2001年至2006年和2014年至2018年的两个时期内运行,收集了大量的$ϕ$ -介子衰变样本。这允许进行精确的测量和基本对称性的研究,以及新物理现象的搜索。在本概述中,介绍了KLOE和KLOE-2合作的结果。最新的结果从KLOE实验进行了讨论,包括:运行的精细结构常数$α_{em}$的测量,Dalitz图测量的$η\rightarrow π^+π^-π^0$,一个U玻色子的搜索,测试的离散对称性和量子退相干。
Studies of the $η$ meson with WASA at COSY and KLOE-2 at DA$Φ$NE
KLOE-2和WASA-at-COSY实验的基本动机之一是检验基本对称性,并在基态介子的强子和轻子衰变中,特别是在$η$介子的衰变中寻找标准模型之外的现象。在COSY,这些介子产生于质子或氘束与氢或氘丸靶的碰撞,而在DA $Φ$ NE $η$介子来源于$ϕ$介子的辐射衰变或来自碰撞电子和正电子之间交换的虚伽马量子的融合。这一贡献包括KLOE-2和WASA-at-COSY使用的实验技术的简要描述,以及一些物理方面的激励调查的生产和衰变的$η$介子。
The 4.2$σ$ discrepancy between the standard model prediction for the muon anomalous magnetic moment $a_μ$ and the experimental result is accompanied by other anomalies. A crucial input for the prediction is the hadronic vacuum polarization $a_μ^{\rm HVP}$ inferred from $σ_{\rm had} =σ(e^+e^- \to\,$hadrons) data. However, the two most accurate determinations of $σ_{\rm had}$ from KLOE and BaBar disagree by almost 3$\,σ$. Additionally, the combined data-driven result disagrees with the most precise lattice determination of $a_μ^{\rm HVP}$ by $2.1\,σ$. We show that all these discrepancies could b…
The most challenging and impactful uncertainties that future accelerator-based measurements of neutrino oscillations must overcome stem from our limited ability to model few-GeV neutrino-nucleus interactions. In particular, it is crucial to better understand the nuclear effects which can alter the final state topology and kinematics of neutrino interactions, inducing possible biases in neutrino energy reconstruction. The upgraded ND280 near detector of the T2K experiment will directly confront neutrino interaction uncertainties using a new suite of detectors with full polar angle acceptance, i…
We present a comparison of existing experimental data for the radiative leptonic decays $P\to\ellν_\ellγ$, where $P=K$ or $π$ and $\ell=e$ or $μ$, from the KLOE, PIBETA, E787, ISTRA+ and OKA collaborations with theoretical predictions based on the recent non-perturbative determinations of the structure-dependent vector and axial-vector form factors, $F_V$ and $F_A$ respectively. These were obtained using lattice QCD+QED simulations at order $O(α_{\mathrm{em}})$ in the electromagnetic coupling. We find good agreement with the KLOE data on $K\to eν_eγ$ decays from which the form factor $F^+=F_V+…