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

(Belle Collaboration)

Research output: Contribution to journalArticle

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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.

Original languageEnglish
Article number031101
JournalPhysical Review D
Volume100
Issue number3
DOIs
Publication statusPublished - 2019 Aug 12

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baryons
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First measurements of absolute branching fractions of the Ξc+ baryon at Belle. / (Belle Collaboration).

In: Physical Review D, Vol. 100, No. 3, 031101, 12.08.2019.

Research output: Contribution to journalArticle

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title = "First measurements of absolute branching fractions of the Ξc+ baryon at Belle",
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.",
author = "{(Belle Collaboration)} and Li, {Y. B.} and Shen, {C. P.} and I. Adachi and Ahn, {J. K.} and H. Aihara and {Al Said}, S. and Asner, {D. M.} and H. Atmacan and T. Aushev and R. Ayad and V. Babu and Bakich, {A. M.} and Y. Ban and V. Bansal and P. Behera and C. Bele{\~n}o and M. Berger and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and A. Bobrov and A. Bozek and M. Bračko and Browder, {T. E.} and M. Campajola and L. Cao and D. Červenkov and V. Chekelian and A. Chen and Cheon, {B. G.} and K. Chilikin and Cho, {H. E.} and K. Cho and Y. Choi and S. Choudhury and D. Cinabro and S. Cunliffe and {Di Carlo}, S. and Z. DoleŽal and D. Dossett and S. Eidelman and D. Epifanov and Fast, {J. E.} and T. Ferber and Fulsom, {B. G.} and R. Garg and V. Gaur and N. Gabyshev and E. Won",
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T1 - First measurements of absolute branching fractions of the Ξc+ baryon at Belle

AU - (Belle Collaboration)

AU - Li, Y. B.

AU - Shen, C. P.

AU - Adachi, I.

AU - Ahn, J. K.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Atmacan, H.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Bakich, A. M.

AU - Ban, Y.

AU - Bansal, V.

AU - Behera, P.

AU - Beleño, C.

AU - Berger, M.

AU - Bhardwaj, V.

AU - Bhuyan, B.

AU - Bilka, T.

AU - Biswal, J.

AU - Bobrov, A.

AU - Bozek, A.

AU - Bračko, M.

AU - Browder, T. E.

AU - Campajola, M.

AU - Cao, L.

AU - Červenkov, D.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, H. E.

AU - Cho, K.

AU - Choi, Y.

AU - Choudhury, S.

AU - Cinabro, D.

AU - Cunliffe, S.

AU - Di Carlo, S.

AU - DoleŽal, Z.

AU - Dossett, D.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Garg, R.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Won, E.

PY - 2019/8/12

Y1 - 2019/8/12

N2 - 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.

AB - 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.

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