First measurements of absolute branching fractions of the Ξc+ baryon at Belle

Date Issued
12-08-2019
Author(s)
Li, Y. B.
Shen, C. P.
Adachi, I.
Ahn, J. K.
Aihara, H.
Al Said, S.
Asner, D. M.
Atmacan, H.
Aushev, T.
Ayad, R.
Babu, V.
Bakich, A. M.
Ban, Y.
Bansal, V.
Behera, P.
Beleño, C.
Berger, M.
Bhardwaj, V.
Bhuyan, B.
Bilka, T.
Biswal, J.
Bobrov, A.
Bozek, A.
BraÄ ko, M.
Browder, T. E.
Campajola, M.
Cao, L.
ÄŒervenkov, D.
Chekelian, V.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, H. E.
Cho, K.
Choi, Y.
Choudhury, S.
Cinabro, D.
Cunliffe, S.
Di Carlo, S.
DoleŽal, Z.
Dossett, D.
Eidelman, S.
Epifanov, D.
Fast, J. E.
Ferber, T.
Fulsom, B. G.
Garg, R.
Gaur, V.
Gabyshev, N.
Garmash, A.
Giri, A.
Goldenzweig, P.
Grube, B.
Grzymkowska, O.
Haba, J.
Hara, T.
Hayasaka, K.
Hayashii, H.
Hou, W. S.
Iijima, T.
Inami, K.
Inguglia, G.
Ishikawa, A.
Iwasaki, M.
Iwasaki, Y.
Jacobs, W. W.
Jia, S.
Jin, Y.
Joffe, D.
Joo, K. K.
Kaliyar, A. B.
Karyan, G.
Kato, Y.
Kawasaki, T.
Kichimi, H.
Kim, C. H.
Kim, D. Y.
Kim, H. J.
Kim, K. T.
Kim, S. H.
Kinoshita, K.
Kodyš, P.
Korpar, S.
Kotchetkov, D.
KriŽan, P.
Kroeger, R.
Krokovny, P.
Kuhr, T.
Kulasiri, R.
Kuzmin, A.
Kwon, Y. J.
Lalwani, K.
Lange, J. S.
Lee, I. S.
Lee, J. K.
Lee, J. Y.
Lee, S. C.
Li, C. H.
Li, L. K.
Li Gioi, L.
DOI
Abstract
We present the first measurements of the absolute branching fractions of Ξc+ decays into Ξ-π+π+ and pK-π+ final states. Our analysis is based on a data set of (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e- collider. We measure the absolute branching fraction of B̄0→Λ̄c-Ξc+ with the Ξc+ recoiling against Λ̄c- in B̄0 decays resulting in B(B̄0→Λ̄c-Ξc+)=[1.16±0.42(stat.)±0.15(syst.)]×10-3. We then measure the product branching fractions B(B̄0→Λ̄c-Ξc+)B(Ξc+→Ξ-π+π+) and B(B̄0→Λ̄c-Ξc+)B(Ξc+→pK-π+). Dividing these product branching fractions by B̄0→Λ̄c-Ξc+ yields B(Ξc+→Ξ-π+π+)=[2.86±1.21(stat.)±0.38(syst.)]% and B(Ξc+→pK-π+)=[0.45±0.21(stat.)±0.07(syst.)]%. Our result for B(Ξc+→Ξ-π+π+) can be combined with Ξc+ branching fractions measured relative to Ξc+→Ξ-π+π+ to set the absolute scale for many Ξc+ branching fractions.
Volume
100