Measurements of ν̅
μ and ν̅
μ + ν
μ charged-current cross-sections without detected pions or protons on water and hydrocarbon at a mean anti-neutrino energy of 0.86 GeV
Authors: Abe K , Akhlaq N , Akutsu R , Ali A , Alt C , Andreopoulos C , Anthony L , Antonova M , Aoki S , Ariga A , Arihara T , Asada Y , Ashida Y , Atkin E T , Awataguchi Y , Ban S , Barbi M , Barker G J , Barr G , Barrow D , Barry C , Batkiewicz-Kwasniak M , Beloshapkin A , Bench F , Berardi V , Berkman S , Berns L , Bhadra S , Bienstock S , Blanchet A , Blondel A , Bolognesi S , Bonus T , Bourguille B , Boyd S B , Brailsford D , Bravar A , Bravo Berguño D , Bronner C , Bron S , Bubak A , Buizza Avanzini M , Calcutt J , Campbell T , Cao S , Cartwright S L , Catanesi M G , Cervera A , Chappell A , Checchia C , Cherdack D , Chikuma N , Christodoulou G , Cicerchia M , Coleman J , Collazuol G , Cook L , Coplowe D , Cudd A , Dabrowska A , De Rosa G , Dealtry T , Denner P F , Dennis S R , Densham C , Dergacheva A , Di Lodovico F , Dokania N , Dolan S , Doyle T A , Drapier O , Dumarchez J , Dunne P , Eguchi A , Eklund L , Emery-Schrenk S , Ereditato A , Fernandez P , Feusels T , Finch A J , Fiorentini G A , Fiorillo G , Francois C , Friend M , Fujii Y , Fujita R , Fukuda D , Fukuda R , Fukuda Y , Fusshoeller K , Gameil K , Giganti C , Golan T , Gonin M , Gorin A , Guigue M , Hadley D R , Haigh J T , Hamacher-Baumann P , Harris D A , Hartz M , Hasegawa T , Hassani S , Hastings N C , Hayashino T , Hayato Y , Hiramoto A , Hogan M , Holeczek J , Hong Van N T , Honjo T , Iacob F , Ichikawa A K , Ikeda M , Ishida T , Ishii T , Ishitsuka M , Iwamoto K , Izmaylov A , Izumi N , Jakkapu M , Jamieson B , Jenkins S J , Jesús-Valls C , Jiang M , Johnson S , Jonsson P , Jung C K , Jurj P B , Kabirnezhad M , Kaboth A C , Kajita T , Kakuno H , Kameda J , Karlen D , Kasetti S P , Kataoka Y , Katayama Y , Katori T , Kato Y , Kearns E , Khabibullin M , Khotjantsev A , Kikawa T , Kikutani H , Kim H , Kim J , King S , Kisiel J , Knight A , Knox A , Kobata T , Kobayashi T , Koch L , Koga T , Konaka A , Kormos L L , Koshio Y , Kostin A , Kowalik K , Kubo H , Kudenko Y , Kukita N , Kuribayashi S , Kurjata R , Kutter T , Kuze M , Labarga L , Lagoda J , Lamoureux M , Last D , Laveder M , Lawe M , Licciardi M , Lindner T , Litchfield R P , Liu S L , Li X , Longhin A , Ludovici L , Lu X , Lux T , Machado L N , Magaletti L , Mahn K , Malek M , Manly S , Maret L , Marino A D , Marti-Magro L , Martin J F , Maruyama T , Matsubara T , Matsushita K , Matveev V , Mauger C , Mavrokoridis K , Mazzucato E , McCarthy M , McCauley N , McElwee J , McFarland K S , McGrew C , Mefodiev A , Metelko C , Mezzetto M , Minamino A , Mineev O , Mine S , Miura M , Molina Bueno L , Moriyama S , Morrison J , Mueller Th A , Munteanu L , Murphy S , Nagai Y , Nakadaira T , Nakahata M , Nakajima Y , Nakamura A , Nakamura K G , Nakamura K , Nakano Y , Nakayama S , Nakaya T , Nakayoshi K , Nantais C , Naseby C E R , Ngoc T V , Nguyen V Q , Niewczas K , Nishikawa K , Nishimura Y , Noah E , Nonnenmacher T S , Nova F , Novella P , Nowak J , Nugent J C , O’Keeffe H M , O’Sullivan L , Odagawa T , Ogawa T , Okada R , Okumura K , Okusawa T , Oser S M , Owen R A , Oyama Y , Palladino V , Palomino J L , Paolone V , Pari M , Parker W C , Parsa S , Pasternak J , Paudyal P , Pavin M , Payne D , Penn G C , Pickering L , Pidcott C , Pintaudi G , Pinzon Guerra E S , Pistillo C , Popov B , Porwit K , Posiadala-Zezula M , Pritchard A , Quilain B , Radermacher T , Radicioni E , Radics B , Ratoff P N , Reinherz-Aronis E , Riccio C , Rondio E , Roth S , Rubbia A , Ruggeri A C , Ruggles C , Rychter A , Sakashita K , Sánchez F , Santucci G , Schloesser C M , Scholberg K , Schwehr J , Scott M , Seiya Y , Sekiguchi T , Sekiya H , Sgalaberna D , Shah R , Shaikhiev A , Shaker F , Shaykina A , Shiozawa M , Shorrock W , Shvartsman A , Skwarczynski K , Smirnov A , Smy M , Sobczyk J T , Sobel H , Soler F J P , Sonoda Y , Spina R , Steinmann J , Suvorov S , Suzuki A , Suzuki S Y , Suzuki Y , Sztuc A A , Tada M , Tajima M , Takeda A , Takeuchi Y , Tanaka H K , Tanaka H A , Tanaka S , Tanihara Y , Tani M , Teshima N , Thompson L F , Toki W , Touramanis C , Towstego T , Tsui K M , Tsukamoto T , Tzanov M , Uchida Y , Uno W , Vagins M , Valder S , Vallari Z , Vargas D , Vasseur G , Vilela C , Vinning W G S , Vladisavljevic T , Volkov V V , Wachala T , Walker J , Walsh J G , Wang Y , Wark D , Wascko M O , Weber A , Wendell R , Wilking M J , Wilkinson C , Wilson J R , Wilson R J , Wood K , Wret C , Xia J , Yamada Y , Yamamoto K , Yanagisawa C , Yang G , Yano T , Yasutome K , Yen S , Yershov N , Yokoyama M , Yoshida T , Yoshimoto Y , Yu M , Zalewska A , Zalipska J , Zaremba K , Zarnecki G , Ziembicki M , Zimmerman E D , Zito M , Zsoldos S , Zykova A 
Published: February 2021

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, $p_{\mu}&gt;400~{\rm MeV}/c$ and $\theta_{\mu}&lt;30^{\circ}$, in the laboratory frame. An absence of pions and protons in the detectable phase spaces of $p_{\pi}&gt;200~{\rm MeV}/c$, $\theta_{\pi}&lt;70^{\circ}$ and $p_{\rm p}&gt;600~{\rm MeV}/c$, $\theta_{\rm p}&lt;70^{\circ}$ 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 $\sigma_{\rm H_{2}O}/\sigma_{\rm CH}=0.996\pm0.069(\rm stat.)^{+0.083}_{-0.078}(\rm syst.)$.