First measurement using a nuclear emulsion detector of the $ν_μ$ charged-current cross section on iron around the 1$\,$GeV energy region
H. Oshima, T. Matsuo, A. Ali, S. Aoki, L. Berns, T. Fukuda, Y. Hanaoka, Y. Hayato, A. Hiramoto, A. K. Ichikawa, H. Kawahara, T. Kikawa, R. Komatani, M. Komatsu,… 展开作者
H. Oshima, T. Matsuo, A. Ali, S. Aoki, L. Berns, T. Fukuda, Y. Hanaoka, Y. Hayato, A. Hiramoto, A. K. Ichikawa, H. Kawahara, T. Kikawa, R. Komatani, M. Komatsu, K. Kuretsubo, T. Marushima, H. Matsumoto, S. Mikado, A. Minamino, K. Mizuno, Y. Morimoto, K. Morishima, N. Naganawa, M. Naiki, M. Nakamura, Y. Nakamura, N. Nakano, T. Nakano, T. Nakaya, A. Nishio, T. Odagawa, S. Ogawa, H. Rokujo, O. Sato, H. Shibuya, K. Sugimura, L. Suzui, Y. Suzuki, H. Takagi, S. Takahashi, T. Takao, Y. Tanihara, R. Watanabe, K. Yamada, K. Yasutome, M. Yokoyama
We have carried out $ν_μ$ charged-current interaction measurement on iron using an emulsion detector exposed to the T2K neutrino beam in the J-PARC neutrino facility. The data samples correspond to 4.0$\times$10$^{19}$ protons on target, and the neutrino mean energy is 1.49$\,$GeV. The emulsion detector is suitable for precision measurements of charged particles produced in neutrino-iron interactions with a low momentum threshold thanks to thin-layered structure and sub-$μ$m spatial resolution. The charged particles are successfully detected, and their multiplicities are measured using the emulsion detector. The cross section was measured to be $σ^{\mathrm{Fe}}_{\mathrm{CC}} = (1.28 \pm 0.11({\mathrm{stat.}})^{+0.12}_{-0.11}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$. The cross section in a limited kinematic phase space of induced muons, $θ_μ < 45^{\circ}$ and $p_μ > 400 \, {\rm MeV}/c$, on iron was $σ^{\mathrm{Fe}}_{\mathrm{CC \hspace{1mm} phase \hspace{0.5mm} space}} = (0.84 \pm 0.07({\mathrm{stat.}})^{+0.07}_{-0.06}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$. The cross-section results are consistent with previous values obtained via different techniques using the same beamline, and they are well reproduced by current neutrino interaction models. These results demonstrate the capability of the detector towards the detailed measurements of the neutrino-nucleus interactions around the 1$\,$GeV energy region.
This study conducted an analysis of muons, protons, and charged pions emitted from $ν_μ$ charged-current interactions on iron using a nuclear emulsion detector. The emulsion detector with a 65$\,$kg iron target was exposed to a neutrino beam corresponding to 4.0$\times$10$^{19}$ protons on target with a mean neutrino energy of 1.49$\,$GeV. The measurements were performed at a momentum threshold of 200 (50)$\,$MeV/$c$ for protons (pions), which are the lowest momentum thresholds attempted up to now. The measured quantities are the multiplicities, emission angles, and momenta of the muons, proto…
This paper reports the track multiplicity and kinematics of muons, charged pions, and protons from charged-current inclusive $\barν_μ$ and $ν_μ$ interactions on a water target, measured using a nuclear emulsion detector in the NINJA experiment. A 3-kg water target was exposed to the T2K antineutrino-enhanced beam with a mean energy of 1.3 GeV. Owing to the high-granularity of the nuclear emulsion, protons with momenta down to 200 MeV/$c$ from the neutrino-water interactions were detected. We find good agreement between the observed data and model predictions for all kinematic distributions oth…
This paper describes a new method for momentum reconstruction of charged particles using multiple Coulomb scatterings in a nuclear emulsion detector with a layered structure of nuclear emulsion films and target materials. The method utilizes the scattering angles of particles precisely measured in the emulsion films. The method is based on the maximum likelihood to newly include information on the decrease of the energy as the particle travels through the detector. According to the Monte Carlo simulations, this method can measure momentum with a resolution of 10% for muons of 500 MeV/c passing…
OPERA（Oscillation Project with Emulsion-tracking Apparatus）是一种新的探测器概念，铁（铅）乳胶用于长基线中微子振荡实验。该实验将在大气中微子异常所指示的参数区域内对nu_mu-nu_tau振荡进行外观搜索。OPERA可以在欧洲核子研究中心提出的NGS（Neutrino to Gran Sasso）光束中在Gran Sasso实验室运行。
Measurement of reconstructed final-state kinematics in charged-current interactions on water using the J-PARC $ν_μ$ beam and NINJA emulsion detector
Nagoya University（名古屋大学）；Kyoto University（京都大学）；Ruđer Bošković Institute（鲁杰尔博什科维奇研究所）；Kobe University（神户大学）；Yokohama National University（横滨国立大学）；The University of Tokyo（东京大学）；King’s College London（伦敦国王学院）；Nihon University（日本大学）
A nuclear emulsion film is a three-dimensional tracking device that is widely used in cosmic-ray and high energy physics experiments. Scanning with a wide angle acceptance is crucial for obtaining track information in emulsion films. This study presents a new method developed for wide angle acceptance and high-speed track recognition of nuclear emulsion films for neutrino-nucleus interaction measurements. The nuclear emulsion technique can be used to measure tracks of charged particles from neutrino interactions with a low momentum threshold. The detection of the particles with a wide angle ac…
Precise measurement of neutrino-nucleus interactions with an accelerator neutrino beam is highly important for current and future neutrino oscillation experiments. To measure muon-neutrino charged-current interactions with nuclear-emulsion-based hybrid detector, muon track matching among the detectors are essential. We describe the design and performance of a newly developed scintillation tracker for the muon track matching in the neutrino-nucleus interaction measurement with nuclear emulsion detectors. The muon tracks are reconstructed using the scintillation tracker and another detector call…
Momentum Measurement of Charged Particles in FASER's Emulsion Detector at the LHC
University of California, Irvine（加州大学尔湾分校）；Zhengzhou University（郑州大学）；ETH Zürich（苏黎世联邦理工学院）；University of Liverpool（利物浦大学）；CERN（欧洲核子研究组织）；University of Geneva（日内瓦大学）；University of Bern（伯尔尼大学）；Chiba University（千叶大学）；Kyushu University（九州大学）；Universität Bonn（波恩大学）；Nikhef National Institute for Su（Nikhef国家研究所）
The present study is based on the interactions caused by 340-GeV negative pions with emulsion nuclei. The main aim of this paper is to investigate some aspects of central collision events. Thus, the events in which the total number of charged shower particles is greater than or equal to twenty eight (Ns geq 28) were chosen for the analysis. They are not exactly central collision events, but may be considered as pseudo-central collision events. The angular characteristics of relativistic charged secondaries have been studied in terms of pseudo-rapidity, and bimodality is found to be absent in t…
We study the impact of the coupling of neutrinos with a new light neutral gauge boson, $Z^\prime$, with a mass of less than 500 {\rm MeV} in FASER$ν$ experiment. Scenarios in which a light gauge boson is coupled to neutrinos are motivated within numerous contexts which are designed to explain various anomalies in particle physics and cosmology. This interaction leads to a new decay mode for charged mesons to a light lepton plus neutrino and $Z^{\prime}$, ($π^+(K^+)\to e^+ νZ^\prime$) followed by the subsequent decay of $Z^\prime$ into the pair of neutrino and anti-neutrino, ($Z^\prime \to ν\ba…
Measurement of Inclusive Charged-Current $\barν_μ$ Scattering on C, CH, Fe, and Pb at $\langle E_{\barν}\rangle \sim$ 6 GeV with MINERvA
The Blackett Laboratory, Imperial College London（帝国理工学院布莱克特实验室）；Department of Physics, Aligarh Muslim University（阿利加尔穆斯林大学物理系）；Department of Physics, William & Mary（威廉与玛丽学院物理系）；Centro Brasileiro de Pesquisas Físicas（巴西物理研究中心）；Campus León y Campus Guanajuato, Universidad de Guanajuato（瓜纳华托大学莱昂校区和瓜纳华托校区）；Department of Physics and Astronomy, University of California at Davis（加州大学戴维斯分校物理与天文学系）；Department of Physics, University of Minnesota – Duluth（明尼苏达大学德卢斯分校物理系）
The proposed India-based Neutrino Observatory will host a 50 kton magnetized iron calorimeter (ICAL) with resistive plate chambers as its active detector element. Its primary focus is to study charged-current interactions of atmospheric muon neutrinos via the reconstruction of muons in the detector. We present the first study of the energy and direction reconstruction of the final state lepton and hadrons produced in charged current interactions of atmospheric electron neutrinos at ICAL and the sensitivity of these events to neutrino oscillation parameters $θ_{23}$ and $Δm_{32}^2$. However, th…
