%0 Electronic Article
%A Li, Y. B.
%A Shen, C. P.
%A Adachi, I.
%A Adamczyk, K.
%A Aihara, H.
%A Al Said, S.
%A Asner, D. M.
%A Aushev, T.
%A Ayad, R.
%A Babu, V.
%A Behera, P.
%A Bennett, J.
%A Bessner, M.
%A Bhardwaj, V.
%A Bhuyan, B.
%A Bilka, T.
%A Biswal, J.
%A Bonvicini, G.
%A Bozek, A.
%A Bračko, M.
%A Browder, T. E.
%A Campajola, M.
%A Cervenkov, D.
%A Chang, M.-C.
%A Chen, A.
%A Cheon, B. G.
%A Chilikin, K.
%A Cho, K.
%A Cho, S.-J.
%A Choi, S.-K.
%A Choi, Y.
%A Choudhury, S.
%A Cinabro, D.
%A Cunliffe, S.
%A Das, S.
%A Dash, N.
%A De Nardo, G.
%A Dhamija, R.
%A Di Capua, F.
%A Dong, T. V.
%A Eidelman, S.
%A Epifanov, D.
%A Ferber, T.
%A Fulsom, B. G.
%A Garg, R.
%A Gaur, V.
%A Gabyshev, N.
%A Garmash, A.
%A Giri, A.
%A Goldenzweig, P.
%A Grzymkowska, O.
%A Gudkova, K.
%A Hadjivasiliou, C.
%A Hartbrich, O.
%A Hayasaka, K.
%A Hayashii, H.
%A Villanueva, M. Hernandez
%A Hsu, C.-L.
%A Ishikawa, A.
%A Itoh, R.
%A Iwasaki, M.
%A Iwasaki, Y.
%A Jacobs, W. W.
%A Jia, S.
%A Jin, Y.
%A Joo, C. W.
%A Joo, K. K.
%A Kang, K. H.
%A Karyan, G.
%A Kato, Y.
%A Kichimi, H.
%A Kim, C. H.
%A Kim, D. Y.
%A Kim, K.-H.
%A Kim, S. H.
%A Kinoshita, K.
%A Kodyš, P.
%A Konno, T.
%A Korobov, A.
%A Korpar, S.
%A Kovalenko, E.
%A Križan, P.
%A Kroeger, R.
%A Krokovny, P.
%A Kuhr, T.
%A Kumar, M.
%A Kumar, R.
%A Kumara, K.
%A Kuzmin, A.
%A Kwon, Y.-J.
%A Lalwani, K.
%A Lange, J. S.
%A Lee, I. S.
%A Lee, S. C.
%A Li, C. H.
%A Li, L. K.
%A Li Gioi, L.
%A Libby, J.
%A Lieret, K.
%A Liventsev, D.
%A Masuda, M.
%A Matvienko, D.
%A McNeil, J. T.
%A Metzner, F.
%A Mizuk, R.
%A Mohanty, G. B.
%A Moon, T. J.
%A Mori, T.
%A Mussa, R.
%A Natochii, A.
%A Nayak, L.
%A Nayak, M.
%A Niiyama, M.
%A Nisar, N. K.
%A Nishida, S.
%A Nishimura, K.
%A Ogawa, S.
%A Ono, H.
%A Onuki, Y.
%A Pakhlov, P.
%A Pakhlova, G.
%A Pang, T.
%A Pardi, S.
%A Park, H.
%A Patra, S.
%A Paul, S.
%A Pedlar, T. K.
%A Pestotnik, R.
%A Piilonen, L. E.
%A Podobnik, T.
%A Popov, V.
%A Prencipe, E.
%A Prim, M. T.
%A Roehrken, Markus
%A Rostomyan, A.
%A Rout, N.
%A Russo, G.
%A Sahoo, D.
%A Sakai, Y.
%A Sandilya, S.
%A Santelj, L.
%A Sanuki, T.
%A Savinov, V.
%A Schnell, G.
%A Schwanda, C.
%A Seino, Y.
%A Senyo, K.
%A Shapkin, M.
%A Sharma, C.
%A Shiu, J.-G.
%A Sokolov, A.
%A Solovieva, E.
%A Starič, M.
%A Stottler, Z. S.
%A Sumihama, M.
%A Tamponi, U.
%A Tanida, K.
%A Tenchini, Francesco
%A Uchida, M.
%A Uehara, S.
%A Uglov, T.
%A Uno, K.
%A Uno, S.
%A Usov, Y.
%A Van Tonder, R.
%A Varner, G.
%A Vinokurova, A.
%A Vossen, A.
%A Wang, C. H.
%A Wang, M.-Z.
%A Wang, P.
%A Wang, X. L.
%A Watanabe, M.
%A Watanuki, S.
%A Won, E.
%A Xu, X.
%A Yan, W.
%A Yang, S. B.
%A Ye, Hua
%A Yin, J. H.
%A Yuan, C. Z.
%A Zhang, Z. P.
%A Zhilich, V.
%A Zhukova, V.
%T Measurements of the branching fractions of semileptonic decays Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> <i>l</i><sup>+</sup> ν<sub><i>l</i></sub> and asymmetry parameter of Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> π<sup>+</sup> decay
%N arXiv:2103.06496
%M PUBDB-2021-01734
%M arXiv:2103.06496
%M Belle Preprint 2021-03
%M KEK Preprint 2020-44
%P 1-8
%D 2021
%Z 2 figures, 1 table; submitted to PRL on 11 March 2021
%X Using a data sample of 89.5 fb<sup>−1</sup> recorded at the energy √s=10.52 GeV with the Belle detector at the KEKB e<sup>+</sup>e<sup>−</sup> collider, we report measurements of branching fractions of semileptonic decays Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> <i>l</i><sup>+</sup> ν<sub><i>l</i></sub> (<i>l</i> = e or μ). Furthermore, based on an additional data sample of 711 fb<sup>−1</sup> at √s = 10.58 GeV, the CP-asymmetry parameter of Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> π<sup>+</sup> decay is extracted. The branching fractions are measured to be <span style="font-family:helvetica"><i>B</i>(Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> e<sup>+</sup> ν<sub>e</sub>)=(1.72 ±0.10 ±0.12 ±0.50)% and <span style="font-family:helvetica"><i>B</i>(Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> μ<sup>+</sup> ν<sub>μ</sub>)=(1.71 ±0.17 ±0.13 ±0.50)% with much improved precision compared to the current world average. The first and the second uncertainty are statistical and systematic, respectively, while the third one arises due to the uncertainty of the Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> π<sup>+</sup> branching fraction. The corresponding ratio <span style="font-family:helvetica"><i>B</i>(Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> e<sup>+</sup> ν<sub>e</sub>)/<span style="font-family:helvetica"><i>B</i>(Ξ<sub>c</sub><sup>0</sup> → Ξ<sup>−</sup> μ<sup>+</sup> ν<sub>μ</sub>) is 1.00 ±0.11 ±0.09, which is consistent with the expectation of lepton flavor universality. The first measured asymmetry parameter is found to be consistent with zero, <span style="font-family:helvetica"><i>A</i><sub>CP</sub> = (α<sub>Ξ<sup>−</sup>π<sup>+</sup></sub> + α<sub>―Ξ<sup>+</sup>π<sup>−</sup></sub>)/(α<sub>Ξ<sup>−</sup>π<sup>+</sup></sub> − α<sub>―Ξ<sup>+</sup>π<sup>−</sup></sub>) = 0.015 ±0.052 ±0.017.
%K electron positron: annihilation (INSPIRE)
%K electron positron: colliding beams (INSPIRE)
%K decay: asymmetry: measured (INSPIRE)
%K lepton: flavor: universality (INSPIRE)
%K Xi/c0: branching ratio: measured (INSPIRE)
%K branching ratio: ratio: measured (INSPIRE)
%K Xi/c0: semileptonic decay (INSPIRE)
%K CP: violation (INSPIRE)
%K asymmetry: CP (INSPIRE)
%K error: statistical (INSPIRE)
%K BELLE (INSPIRE)
%K KEK-B (INSPIRE)
%K experimental results (INSPIRE)
%K Xi/c0 --> Xi- positron neutrino/e (INSPIRE)
%K Xi/c0 --> Xi- muon+ neutrino/mu (INSPIRE)
%K Xi/c0 --> Xi- pi+ (INSPIRE)
%K 10.58 GeV-cms (INSPIRE)
%F PUB:(DE-HGF)25
%9 Preprint
%R 10.3204/PUBDB-2021-01734
%U https://bib-pubdb1.desy.de/record/456888