ChPT tests at the NA48 and NA62 experiments at CERN
NA48/2, NA62 Collaborations, :, F. Ambrosino, A. Antonelli, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J. R. Batley, M. Behler, S. Bifani, C. Biino, A. … 展开作者
NA48/2, NA62 Collaborations, :, F. Ambrosino, A. Antonelli, G. Anzivino, R. Arcidiacono, W. Baldini, S. Balev, J. R. Batley, M. Behler, S. Bifani, C. Biino, A. Bizzeti, B. Bloch-Devaux, G. Bocquet, V. Bolotov, F. Bucci, N. Cabibbo, M. Calvetti, N. Cartiglia, A. Ceccucci, P. Cenci, C. Cerri, C. Cheshkov, J. B. Chèze, M. Clemencic, G. Collazuol, F. Costantini, A. Cotta Ramusino, D. Coward, D. Cundy, A. Dabrowski, G. D'Agostini, P. Dalpiaz, C. Damiani, H. Danielsson, M. De Beer, G. Dellacasa, J. Derré, H. Dibon, D. Di Filippo, L. DiLella, N. Doble, V. Duk, J. Engelfried, K. Eppard, V. Falaleev, R. Fantechi, M. Fidecaro, L. Fiorini, M. Fiorini, T. Fonseca Martin, P. L. Frabetti, A. Fucci, S. Gallorini, L. Gatignon, E. Gersabeck, A. Gianoli, S. Giudici, A. Gonidec, E. Goudzovski, S. Goy Lopez, E. Gushchin, B. Hallgren, M. Hita-Hochgesand, M. Holder, P. Hristov, E. Iacopini, E. Imbergamo, M. Jeitler, G. Kalmus, V. Kekelidze, K. Kleinknecht, V. Kozhuharov, W. Kubischta, V. Kurshetsov, G. Lamanna, C. Lazzeroni, M. Lenti, E. Leonardi, L. Litov, D. Madigozhin, A. Maier, I. Mannelli, F. Marchetto, G. Marel, M. Markytan, P. Marouelli, M. Martini, L. Masetti, P. Massarotti, E. Mazzucato, A. Michetti, I. Mikulec, M. Misheva, N. Molokanova, E. Monnier, U. Moosbrugger, C. Morales Morales, M. Moulson, S. Movchan, D. J. Munday, M. Napolitano, A. Nappi, G. Neuhofer, A. Norton, T. Numao, V. Obraztsov, V. Palladino, M. Patel, M. Pepe, A. Peters, F. Petrucci, M. C. Petrucci, B. Peyaud, R. Piandani, M. Piccini, G. Pierazzini, I. Polenkevich, I. Popov, Yu. Potrebenikov, M. Raggi, B. Renk, F. Retière, P. Riedler, A. Romano, P. Rubin, G. Ruggiero, A. Salamon, G. Saracino, M. Savrié, M. Scarpa, V. Semenov, A. Sergi, M. Serra, M. Shieh, S. Shkarovskiy, M. W. Slater, M. Sozzi, T. Spadaro, S. Stoynev, E. Swallow, M. Szleper, M. Valdata-Nappi, P. Valente, B. Vallage, M. Velasco, M. Veltri, S. Venditti, M. Wache, H. Wahl, A. Walker, R. Wanke, L. Widhalm, A. Winhart, R. Winston, M. D. Wood, S. A. Wotton, O. Yushchenko, A. Zinchenko, M. Ziolkowski
备注：
XIIth International Conference on Heavy Quarks and Leptons 2014, Mainz, Germany
The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) ($K^\pm \to π^+ π^- e^\pm ν$) and Ke4(00) ($K^\pm \to π^0 π^0 e^\pm ν$) with nearly one percent background contamination. The detailed study of form factors and branching rates, based on these data, has been completed recently. The results brings new inputs to low energy strong interactions description and tests of Chiral Perturbation Theory (ChPT) and lattice QCD calculations. In particular, new data support the ChPT prediction for a cusp in the $π^0π^0$ invariant mass spectrum at the two charged pions threshold for Ke4(00) decay. New final results from an analysis of about 400 $K^\pm \to π^\pm γγ$ rare decay candidates collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to ChPT description.
Measurements of Ke4 and K+- -> pi0 pi0 pi+- decays
CERN SPS的NA48/2实验在2003年和2004年收集了大量衰变K +--> pi + pi-e +-nu（Ke4 +-）、K +--> pi0 pi0 e +-nu（Ke400）和K +--> pi0 pi0 pi +-的样品。从K +-> pi 0 pi 0 pi +-事件的Ke 4 +-形状因子和M00 ^2分布中的尖点，可以提取pi-pi散射长度a00和a20。该测量是手性微扰理论（ChPT）的基本测试。分支分数和形状因子的KE 400衰变精确测量，使用比以前的实验中更大的数据样本。
CERN SPS的NA 48/2实验在2003年和2004年收集了大量衰变K+- -> pi+ pi- e+- nu（Ke 4 +-）、K+- -> pi 0 pi 0 e+- nu（Ke 400）和K+- -> pi 0 pi 0 pi+-的样品。从K+-> pi 0 pi 0 pi+-事件的Ke 4 +-形状因子和M00 ^2分布中的尖点，可以提取pi-pi散射长度a00和a20。该测量是手性微扰理论（ChPT）的基本测试。分支分数和形状因子的KE 400衰变精确测量，使用比以前的实验中更大的数据样本。对衰减K+-> pi 0 pi 0 pi+-的斜率参数的改进测量显示了k的非零值的证据。
Pions: Experimental Tests of Chiral Symmetry Breaking
基于手征对称性的自发破缺，手征微扰理论（ChPT）被认为是禁闭尺度QCD的近似。专门的和越来越精确的实验和改进的晶格计算正在证实这一信念，我们正在进入一个新的时代，我们可以在一些精心选择的反应中测试限制尺度QCD。这是证明了低能量的实验测试的ChPT预测的$ππ$散射，π介子性质，$π$ N散射和电磁π介子生产的概述。这些预言已经被越来越精确的格子计算证明与介子扇区的QCD是一致的。目前，实验和ChPT计算之间有很好的协议，包括$ππ$和$π$ N s波散射长度和$π^{0}$寿命。最近，精确的π原子数据与手征计算一致，一旦考虑到由于上下夸克的质量差引起的同位旋破缺效应，就像提取$ππ$散射长度所要求的那样。除了测试的理论，比较$ππ$和$π$ N之间的相互作用的基础上一般手性原则进行了讨论。晶格计算现在提供的基本结果，长期和不确定的研究，$π$ N $σ$长期和奇怪的夸克的贡献的质子质量。越来越精确的实验，在电磁π介子生产实验的质子，测试ChPT计算（及其能量区域的有效性）。这些实验也开始测量最终状态的$π$ N相互作用。本文基于2012年8月在Jefferson实验室举行的手性动力学研讨会CD12上的总结发言。
$R_K$ and $K^+\rightarrowπ^+ν\barν with NA62 at CERN SPS
介绍了CERN SPS的NA 62实验的最新结果和展望。NA 62实验在两年的数据采集中对$K^+\rightarrow e^\pmν$和K^+ \rightarrow μ^ \pm ν $ decay rates using the full data set collected in 2007. The result is in agreement with the Standard Model expectation. The ultra-rare decay $ K^+ \rightarrow π^+ν \bar ν $ is an excellent processes to make tests of new physics at the highest scale complementary to the LHC thanks to their theoretically cleanness. The NA62 experiment at CERN SPS aims to collect of the order of 100 $ K^+ \rightarrow π^+ ν \bar ν$事件的比率$R_K$进行了最精确的测量，将本底保持在10%的水平。
First-Principles Determination of the QCD Contribution to the Axion-Photon Coupling Using Domain-Wall Fermions
School of Physics, Peking University（北京大学物理学院）；Collaborative Innovation Center of Quantum Matter（量子物质协同创新中心）；Center for High Energy Physics, Peking University（北京大学高能物理中心）；Southern Center for Nuclear-Science Theory (SCNT), Institute of Modern Physics, Chinese Academy of Sciences（中国科学院近代物理研究所南方核科学理论中心（SCNT））；Department of Physics, University of Connecticut（康涅狄格大学物理系）
Modeling Light Signals Using Data from the First Pulsed Neutron Source Program at the DUNE Vertical Drift ColdBox Test Facility at CERN Neutrino Platform
Fermi National Accelerator Laboratory（费米国家加速器实验室）；Stony Brook University, SUNY（石溪大学，纽约州立大学）；South Dakota School of Mines and Technology（南达科他矿业和理工学院）；CERN（欧洲核子研究中心）；Tel Aviv University（特拉维夫大学）；University of Milano-Bicocca（米兰比可卡大学）；Argonne National Laboratory（阿贡国家实验室）；Colorado State University（科罗拉多州立大学）；Laboratoire d’Annecy-le-Vieux de Physique des Particules（昂纳西勒沃粒子物理实验室）；Università degli Studi di Milano（米兰大学）；University of California Davis（加州大学戴维斯分校）；Los Alamos National Laboratory（洛斯阿拉莫斯国家实验室）；University of Minnesota Twin Cities（明尼苏达大学双城分校）
