NOvA实验是一个长基线中微子振荡实验，旨在测量电子中微子出现和μ子中微子消失的速率。NOvA近距离探测器位于费米实验室，距离主要目标800米，为测量和研究中微子-核相互作用提供了一个极好的平台。我们提出了测量的双微分截面相对于μ子运动学的相互作用，涉及带电π介子在最终状态，$ν_μ + N \rightarrow μ+ π^{+/-} + X$的状态。我们已经推导出了一种基于卷积神经网络的方法，用于识别具有特定终态拓扑结构的中微子相互作用。我们目前的事件分类效率的研究，使用这种粒子识别和分类方法，以及系统的不确定性和前景的测量。
英文摘要：
The NOvA experiment is a long-baseline neutrino oscillation experiment designed to measure the rates of electron neutrino appearance and muon neutrino disappearance. The NOvA near detector is located at Fermilab, 800 m from the primary target and provides an excellent platform to measure and study neutrino-nucleus interactions. We present the status of the measurement of the double differential cross section with respect to muon kinematics for interactions involving charged pions in the final state, $ν_μ + N \rightarrow μ+ π^{+/-} + X$. We have derived a convolutional neural network-based approach for the identification of neutrino interactions with the specific final state topology. We present event classification efficiency studies using this particle identification and classification methodology, along with systematic uncertainties and prospects for the measurement.
First inclusive triple-differential measurement of the muon-antineutrino charged-current cross section using the NOvA Near Detector
Erciyes University（埃尔吉耶斯大学）；Universidad del Atlantico（大西洋大学）；University of Mississippi（密西西比大学）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；Joint Institute for Nuclear Research（联合核研究所）；Universidad del Magdalena（马格达莱纳大学）；University of Sussex（萨塞克斯大学）；University of Cincinnati（辛辛那提大学）；University of California at Irvine（加州大学尔湾分校）；University of Hyderabad（海得拉巴大学）
Measurement of $π^0$ Production in $\barν_μ$ Charged-Current Interactions in the NOvA Near Detector
Erciyes University（埃尔齐耶斯大学）；Universidad del Atlantico（大西洋大学）；University of Mississippi（密西西比大学）；Fermi National Accelerator Laboratory（费米国家加速器实验室）；Joint Institute for Nuclear Research（苏联联合核研究所）；Universidad del Magdalena（马格达莱纳大学）；University of Sussex（萨塞克斯大学）；University of Cincinnati（辛辛那提大学）；Indiana University（印第安纳大学）；Iowa State University（爱荷华州立大学）；University of California at Irvine（加州大学尔湾分校）；University of Hyderabad（海得拉巴大学）
Measurement of Collins asymmetries in inclusive production of pion pairs in e^+e^- collisions at BABAR
我们在质心能量接近10.6 GeV的情况下，对包含过程e^+e^-> qqbar --> pi pi X中的柯林斯不对称性进行了初步测量。我们使用BABAR实验收集的468 fb^（-1）的数据样本，并考虑强子事件中相对喷流中产生的带电π介子对。我们证实了非零柯林斯效应所观察到的先前的实验，我们研究的柯林斯不对称性作为一个函数的π分数能量和横动量，并作为一个函数的极角的分析轴。
Semi-inclusive processes are very promising to investigate $XYZ$ hadrons at the next generation of electron-hadron facilities, because they generally boast higher cross sections. We extend our formalism of exclusive photoproduction to semi-inclusive final states. The inclusive production cross sections for charged axial-vector $Z$ states from pion exchange are predicted. We isolate the contribution of $Δ$ resonances at small missing mass. Production near threshold is shown to be enhanced roughly by a factor of two compared to the exclusive reaction. We benchmark the model with data of semi-inc…
Longitudinal double-spin asymmetry and cross section for inclusive neutral pion production at midrapidity in polarized proton collisions at sqrt(s) = 200 GeV
Over the past 60 years a rich sample of experimental results concerning the inclusive production of $π^-$ mesons has been obtained spanning a range from about 3 GeV to 13 TeV in interaction energy. This paper attempts a model-independent overview of these results with the aim at obtaining an internally consistent data description on a dense grid over the three inclusive variables transverse momentum, rapidity or Feynman $x_F$ and interaction energy. The study concentrates on the non-perturbative sector of the strong interaction by limiting the transverse momenta to $p_T <$ 1.3 GeV/c. The three…
This analysis aims to study inclusive neutrino-induced Neutral Current (NC) interactions that produce at least one neutral pion ($π^0$) in the final state (incNC$π^0$ ) in the T2K off-axis near detector ND280. The motivation for this study is to better understand/eliminate the background to electron neutrino appearance analyzed at the far detector Super-Kamiokande. As $π^0$ decays are background to the appearance search, a good knowledge of both inclusive and exclusive neutrino interaction cross sections are key to improving associated systematic uncertainties in T2K oscillation analyses. Resu…
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised $^6$LiD (deuteron) and NH$_3$ (proton) targets is presented. All available data collected in the years 2002-2004 and 2007/2010 with the COMPASS spectrometer using a muon beam of 160 GeV/$c$ at the CERN SPS were analysed. The asymmetries provide access to the transversity distribution functions via a fragmentation function that in principle may be independently obtained from $e^+e^-$ annihilation data. Results are presented, discussed an…
We present a new determination of unpolarised charged pion and kaon fragmentation functions from a set of single-inclusive electron-positron annihilation and lepton-nucleon semi-inclusive deep-inelastic scattering data. The determination includes next-to-next-to-leading order QCD corrections to both processes, and is carried out in a framework that combines a neural-network parametrisation of fragmentation functions with a Monte Carlo representation of their uncertainties. We discuss the quality of the determination, in particular its dependence on higher order corrections.
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
