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Alt, C; Andreopoulos, C; Anthony, L; Arihara, T; Awataguchi, Y; Barry, C; Bench, F; Berardi, V; Bienstock, S; Bolognesi, S; Bourguille, B; Bron, S; Campbell, T; Cao, S; Catanesi, M G; Cherdack, D; Cicerchia, M; Coleman, J; Coplowe, D; Cudd, A; Dabrowska, A; Dennis, S R; Feusels, T; Fiorillo, G; Francois, C; Friend, M; Gameil, K; Gonin, M; Hamacher-Baumann, P; Hartz, M; Hayashino, T; Ishida, T; Ishitsuka, M; Jiang, M; Jung, C K; Kajita, T; Karlen, D; King, S; Kobayashi, T; Kostin, A; Kowalik, K; Kudenko, Y; Kuze, M; Labarga, L; Last, D; Litchfield, R P; Li, X; Longhin, A; Mahn, K; Malek, M; Maruyama, T; Mavrokoridis, K; McElwee, J; Miura, M; Molina Bueno, L; Moriyama, S; Nakadaira, T; Nakayama, S; Naseby, C E R; Ngoc, T V; Novella, P; Ogawa, T; Okusawa, T; Oser, S M; Palladino, V; Pari, M; Parker, W C; Parsa, S; Pasternak, J; Paudyal, P; Popov, B; Quilain, B; Radics, B; Santucci, G; Schwehr, J; Sekiguchi, T; Shaker, F; Shvartsman, A; Skwarczynski, K; Suvorov, S; Tajima, M; Takeda, A; Takeuchi, Y; Tanaka, H A; Toki, W; Touramanis, C; Vagins, M; Volkov, V V; Wachala, T; Walsh, J G; Wilkinson, C; Wilson, R J; Yamada, Y; Yang, G; Yasutome, K; Yoshida, T; Yu, M; Zalewska, A; Zimmerman, E D; Zsoldos, S
Progress of theoretical and experimental physics, 04/2021, Volume: 2021, Issue: 4Journal Article
Abstract We report measurements of the flux-integrated ν̅μ and ν̅μ + νμ charged-current cross-sections on water and hydrocarbon targets using the T2K anti-neutrino beam with a mean beam energy of 0.86 GeV. The signal is defined as the (anti-)neutrino charged-current interaction with one induced $\mu^\pm$ and no detected charged pion or proton. These measurements are performed using a new WAGASCI module recently added to the T2K setup in combination with the INGRID Proton Module. The phase space of muons is restricted to the high-detection efficiency region, $p_{\mu}>400~{\rm MeV}/c$ and $\theta_{\mu}<30^{\circ}$, in the laboratory frame. An absence of pions and protons in the detectable phase spaces of $p_{\pi}>200~{\rm MeV}/c$, $\theta_{\pi}<70^{\circ}$ and $p_{\rm p}>600~{\rm MeV}/c$, $\theta_{\rm p}<70^{\circ}$ is required. In this paper, both the $\overline{\nu}_\mu$ cross-sections and $\overline{\nu}_\mu+\nu_\mu$ cross-sections on water and hydrocarbon targets and their ratios are provided by using the D’Agostini unfolding method. The results of the integrated $\overline{\nu}_\mu$ cross-section measurements over this phase space are $\sigma_{\rm H_{2}O}=(1.082\pm0.068(\rm stat.)^{+0.145}_{-0.128}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, $\sigma_{\rm CH}=(1.096\pm0.054(\rm stat.)^{+0.132}_{-0.117}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, and $\sigma_{\rm H_{2}O}/\sigma_{\rm CH} = 0.987\pm0.078(\rm stat.)^{+0.093}_{-0.090}(\rm syst.)$. The $\overline{\nu}_\mu+\nu_\mu$ cross-section is $\sigma_{\rm H_{2}O} = (1.155\pm0.064(\rm stat.)^{+0.148}_{-0.129}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, $\sigma_{\rm CH}=(1.159\pm0.049(\rm stat.)^{+0.129}_{-0.115}(\rm syst.)) \times 10^{-39}\,{\rm cm^{2} / nucleon}$, and $\sigma_{\rm H_{2}O}/\sigma_{\rm CH}=0.996\pm0.069(\rm stat.)^{+0.083}_{-0.078}(\rm syst.)$.
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