Research output: Contribution to journal › Article › peer-review
First measurements of absolute branching fractions of the Ξc 0 Baryon at Belle. / The BELLE collaboration.
In: Physical Review Letters, Vol. 122, No. 8, 082001, 25.02.2019.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - First measurements of absolute branching fractions of the Ξc 0 Baryon at Belle
AU - The BELLE collaboration
AU - Li, Y. B.
AU - Shen, C. P.
AU - Yuan, C. Z.
AU - Adachi, I.
AU - Aihara, H.
AU - Al Said, S.
AU - Asner, D. M.
AU - Aushev, T.
AU - Ayad, R.
AU - Badhrees, I.
AU - Ban, Y.
AU - Bansal, V.
AU - Belenõ, C.
AU - Berger, M.
AU - Bhardwaj, V.
AU - Bhuyan, B.
AU - Bilka, T.
AU - Biswal, J.
AU - Bondar, A.
AU - Bozek, A.
AU - Bračko, M.
AU - Cao, L.
AU - Červenkov, D.
AU - Chen, A.
AU - Cheon, B. G.
AU - Chilikin, K.
AU - Cho, K.
AU - Choi, S. K.
AU - Choi, Y.
AU - Cinabro, D.
AU - Cunliffe, S.
AU - Di Carlo, S.
AU - DoleŽal, Z.
AU - Dong, T. V.
AU - Drásal, Z.
AU - Eidelman, S.
AU - Fast, J. E.
AU - Fulsom, B. G.
AU - Garg, R.
AU - Gaur, V.
AU - Gabyshev, N.
AU - Garmash, A.
AU - Giri, A.
AU - Goldenzweig, P.
AU - Greenwald, D.
AU - Grube, B.
AU - Hayasaka, K.
AU - Hayashii, H.
AU - Shwartz, B.
AU - Zhilich, V.
PY - 2019/2/25
Y1 - 2019/2/25
N2 - We present the first measurements of absolute branching fractions of Ξc 0 decays into Ξ-π+, ΛK-π+, and pK-K-π+ final states. The measurements are made using a dataset comprising (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e-collider. We first measure the absolute branching fraction for B-→Λ̄c-Ξc 0 using a missing-mass technique; the result is B(B-→Λ̄c-Ξc 0 )=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →Ξ-π+), B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →ΛK-π+), and B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc 0 yields the following branching fractions: B(Ξc 0 →Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc 0 →ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc 0 →pK-K-π+)=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξc 0 →Ξ-π+) can be combined with Ξc 0 branching fractions measured relative to Ξc 0 →Ξ-π+ to yield other absolute Ξc 0 branching fractions.
AB - We present the first measurements of absolute branching fractions of Ξc 0 decays into Ξ-π+, ΛK-π+, and pK-K-π+ final states. The measurements are made using a dataset comprising (772±11)×106 BB̄ pairs collected at the (4S) resonance with the Belle detector at the KEKB e+e-collider. We first measure the absolute branching fraction for B-→Λ̄c-Ξc 0 using a missing-mass technique; the result is B(B-→Λ̄c-Ξc 0 )=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →Ξ-π+), B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →ΛK-π+), and B(B-→Λ̄c-Ξc 0 )B(Ξc 0 →pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc 0 yields the following branching fractions: B(Ξc 0 →Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc 0 →ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc 0 →pK-K-π+)=(0.58±0.23±0.05)%. For the above branching fractions, the first uncertainties are statistical and the second are systematic. Our result for B(Ξc 0 →Ξ-π+) can be combined with Ξc 0 branching fractions measured relative to Ξc 0 →Ξ-π+ to yield other absolute Ξc 0 branching fractions.
KW - NONLEPTONIC DECAYS
KW - WEAK DECAYS
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UR - http://www.scopus.com/inward/record.url?scp=85062550770&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.122.082001
DO - 10.1103/PhysRevLett.122.082001
M3 - Article
C2 - 30932568
AN - SCOPUS:85062550770
VL - 122
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 8
M1 - 082001
ER -
ID: 18784053