Search for $C\!P$ violation in $D^+_{(s)}\to{}K_{S}^{0}K^{-}π^{+}π^{+}$ decays using triple and quadruple products
Creators: name: Belle
name: Collaborations, Belle II
name: :
name: Aggarwal, L.
name: Ahmed, H.
name: Aihara, H.
name: Akopov, N.
name: Aloisio, A.
name: Althubiti, N.
name: Ky, N. Anh
name: Asner, D. M.
name: Atmacan, H.
name: Aushev, V.
name: Aversano, M.
name: Ayad, R.
name: Babu, V.
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name: Baghel, N. K.
name: Bahinipati, S.
name: Bambade, P.
name: Banerjee, Sw.
name: Baudot, J.
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name: Becker, J.
name: Bennett, J. V.
name: Bernlochner, F. U.
name: Bertacchi, V.
name: Bertemes, M.
name: Bertholet, E.
name: Bessner, M.
name: Bettarini, S.
name: Bhardwaj, V.
name: Bianchi, F.
name: Bilka, T.
name: Biswas, D.
name: Bobrov, A.
name: Bodrov, D.
name: Boschetti, A.
name: Bozek, A.
name: Bračko, M.
name: Branchini, P.
name: Briere, R. A.
name: Browder, T. E.
name: Budano, A.
name: Bussino, S.
name: Campajola, M.
name: Cao, L.
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name: Chang, M. -C.
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name: Cho, K.
name: Cho, S. -J.
name: Choi, S. -K.
name: Choudhury, S.
name: Cochran, J.
name: Corona, L.
name: Cui, J. X.
name: De La Cruz-Burelo, E.
name: De La Motte, S. A.
name: De Nardo, G.
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name: de Sangro, R.
name: Destefanis, M.
name: Dhamija, R.
name: Di Canto, A.
name: Di Capua, F.
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name: Doležal, Z.
name: Dong, T. V.
name: Dorigo, M.
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name: Feichtinger, P.
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name: Finck, C.
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name: Fodor, A.
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name: Fulsom, B. G.
name: Gabrielli, A.
name: Ganiev, E.
name: Garcia-Hernandez, M.
name: Garg, R.
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name: Graziani, E.
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name: Haide, I.
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name: de la Cruz, I. Heredia
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name: Hohmann, M.
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name: Podobnik, T.
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name: Sandilya, S.
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name: Savinov, V.
name: Scavino, B.
name: Schneider, S.
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name: Stavroulakis, P.
name: Stefkova, S.
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name: Wallner, S.
name: Wang, M. -Z.
name: Wang, X. L.
name: Wang, Z.
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name: Wessel, C.
name: Xu, X. P.
name: Yabsley, B. D.
name: Yamada, S.
name: Yan, W.
name: Yelton, J.
name: Yin, J. H.
name: Yuan, C. Z.
name: Zani, L.
name: Zeng, F.
name: Zhou, J. S.
name: Zhou, Q. D.
name: Zhukova, V. I.
name: Žlebčík, R.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We perform the first search for $C\!P$ violation in ${D_{(s)}^{+}\to{}K_{S}^{0}K^{-}π^{+}π^{+}}$ decays. We use a combined data set from the Belle and Belle II experiments, which study $e^+e^-$ collisions at center-of-mass energies at or near the $Υ(4S)$ resonance. We use 980 fb$^{-1}$ of data from Belle and 428 fb$^{-1}$ of data from Belle~II. We measure six $C\!P$-violating asymmetries that are based on triple products and quadruple products of the momenta of final-state particles, and also the particles' helicity angles. We obtain a precision at the level of 0.5% for $D^+\to{}K_{S}^{0}K^{-}π^{+}π^{+}$ decays, and better than 0.3% for $D^+_{s}\to{}K_{S}^{0}K^{-}π^{+}π^{+}$ decays. No evidence of $C\!P$ violation is found. Our results for the triple-product asymmetries are the most precise to date for singly-Cabibbo-suppressed $D^+$ decays. Our results for the other asymmetries are the first such measurements performed for charm decays.
description: 21 pages, 10 figures