利用核乳剂探测器首次测量了1 GeV能区附近铁上ν μ带电电流的截面

H. Oshima, T. Matsuo, Aidy Ali, S. Aoki, L. Berns, T. Fukuda, Y. Hanaoka, Y. Hayato, A. Hiramoto, A. 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
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引用次数: 4

摘要

我们报告了在J-PARC中微子设施中使用暴露于T2K中微子束的乳基探测器在铁上的通量平均$\nu_{\mu}$电荷电流截面。数据样本对应4.0 $\times$ 10 $^{19}$个质子在靶上,中微子平均能量为1.49 $\,$ GeV。测量截面为$\sigma^{\mathrm{Fe}}_{\mathrm{CC}} = (1.28 \pm 0.11({\mathrm{stat.}})^{+0.12}_{-0.11}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$。诱导μ子$\theta_{\mu} 400 \, {\rm MeV}/c$在铁上的有限运动相空间的横截面为$\sigma^{\mathrm{Fe}}_{\mathrm{CC \hspace{1mm} phase \hspace{0.5mm} space}} = (0.84 \pm 0.07({\mathrm{stat.}})^{+0.07}_{-0.06}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$。这些结果与以前通过不同技术使用同一束线获得的结果一致,并且可以很好地由当前的中微子相互作用模型再现。这些结果代表了精确测量1 $\,$ GeV能量区域周围的中微子-核相互作用的重大进展。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
First measurement using a nuclear emulsion detector of the ν μ charged-current cross section on iron around the 1 GeV energy region
We report the flux-averaged $\nu_{\mu}$ charged-current cross sections on iron using an emulsion-based 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 cross section was measured to be $\sigma^{\mathrm{Fe}}_{\mathrm{CC}} = (1.28 \pm 0.11({\mathrm{stat.}})^{+0.12}_{-0.11}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$. The cross section in a limited kinematic phase space of induced muons, $\theta_{\mu} 400 \, {\rm MeV}/c$, on iron was $\sigma^{\mathrm{Fe}}_{\mathrm{CC \hspace{1mm} phase \hspace{0.5mm} space}} = (0.84 \pm 0.07({\mathrm{stat.}})^{+0.07}_{-0.06}({\mathrm{syst.}})) \times 10^{-38} \, {\mathrm{cm}}^{2}/{\mathrm{nucleon}}$. These results are consistent with previous values obtained via different techniques using the same beamline, and it is well reproduced by current neutrino interaction models. These results represent a significant advance for precise measurements of the neutrino-nucleus interactions around the 1$\,$GeV energy region.
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