First measurements of absolute branching fractions of the Ξc0 Baryon at Belle

Belle Collaboration

doi:10.1103/PhysRevLett.122.082001

First measurements of absolute branching fractions of the Ξc₀ Baryon at Belle

Belle Collaboration

Department of Physics

Research output: Contribution to journal › Article › peer-review

29 Citations (Scopus)

Abstract

We present the first measurements of absolute branching fractions of Ξc₀ 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-Ξc₀ using a missing-mass technique; the result is B(B-→Λ̄c-Ξc₀)=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc₀)B(Ξc₀→Ξ-π+), B(B-→Λ̄c-Ξc₀)B(Ξc₀→ΛK-π+), and B(B-→Λ̄c-Ξc₀)B(Ξc₀→pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc₀ yields the following branching fractions: B(Ξc₀→Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc₀→ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc₀→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(Ξc₀→Ξ-π+) can be combined with Ξc₀ branching fractions measured relative to Ξc₀→Ξ-π+ to yield other absolute Ξc₀ branching fractions.

Original language	English
Article number	082001
Journal	Physical review letters
Volume	122
Issue number	8
DOIs	https://doi.org/10.1103/PhysRevLett.122.082001
Publication status	Published - 2019 Feb 25

Bibliographical note

Funding Information:
We thank Professor Fu-sheng Yu for useful discussions and comments. Y. B. L. acknowledges the support from the China Scholarship Council (201706010043). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); the National Natural Science Foundation of China under Contracts No. 11475187, No. 11521505, No. 11575017, No. 11761141009; the CAS Center for Excellence in Particle Physics (CCEPP); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project and GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement No. 14.W03.31.0026 (Russia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (U.S.).

Publisher Copyright:
© 2019 Authors. Published by the American Physical Society.

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.122.082001

Cite this

@article{214de527943b49b1a6e8abacfc6ab52f,

title = "First measurements of absolute branching fractions of the Ξc0 Baryon at Belle",

abstract = "We present the first measurements of absolute branching fractions of Ξc0 decays into Ξ-π+, ΛK-π+, and pK-K-π+ final states. The measurements are made using a dataset comprising (772±11)×106 B{\=B} 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-→{\=Λ}c-Ξc0 using a missing-mass technique; the result is B(B-→{\=Λ}c-Ξc0)=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→{\=Λ}c-Ξc0)B(Ξc0→Ξ-π+), B(B-→{\=Λ}c-Ξc0)B(Ξc0→ΛK-π+), and B(B-→{\=Λ}c-Ξc0)B(Ξc0→pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→{\=Λ}c-Ξc0 yields the following branching fractions: B(Ξc0→Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc0→ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc0→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(Ξc0→Ξ-π+) can be combined with Ξc0 branching fractions measured relative to Ξc0→Ξ-π+ to yield other absolute Ξc0 branching fractions.",

author = "{Belle Collaboration} and Li, {Y. B.} and Shen, {C. P.} and Yuan, {C. Z.} and I. Adachi and H. Aihara and {Al Said}, S. and Asner, {D. M.} and T. Aushev and R. Ayad and I. Badhrees and Y. Ban and V. Bansal and C. Belen{\~o} and M. Berger and V. Bhardwaj and B. Bhuyan and T. Bilka and J. Biswal and A. Bondar and A. Bozek and M. Bra{\v c}ko and L. Cao and D. {\v C}ervenkov and A. Chen and Cheon, {B. G.} and K. Chilikin and K. Cho and Choi, {S. K.} and Y. Choi and D. Cinabro and S. Cunliffe and {Di Carlo}, S. and Z. Dole{\v Z}al and Dong, {T. V.} and Z. Dr{\'a}sal and S. Eidelman and Fast, {J. E.} and Fulsom, {B. G.} and R. Garg and V. Gaur and N. Gabyshev and A. Garmash and A. Giri and P. Goldenzweig and D. Greenwald and B. Grube and K. Hayasaka and H. Hayashii and Hsu, {C. L.} and Kwon, {Y. J.}",

note = "Funding Information: We thank Professor Fu-sheng Yu for useful discussions and comments. Y. B. L. acknowledges the support from the China Scholarship Council (201706010043). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya{\textquoteright}s TLPRC (Japan); ARC (Australia); FWF (Austria); the National Natural Science Foundation of China under Contracts No. 11475187, No. 11521505, No. 11575017, No. 11761141009; the CAS Center for Excellence in Particle Physics (CCEPP); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project and GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement No. 14.W03.31.0026 (Russia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (U.S.). Publisher Copyright: {\textcopyright} 2019 Authors. Published by the American Physical Society.",

year = "2019",

month = feb,

day = "25",

doi = "10.1103/PhysRevLett.122.082001",

language = "English",

volume = "122",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "8",

}

TY - JOUR

T1 - First measurements of absolute branching fractions of the Ξc0 Baryon at Belle

AU - 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 - Hsu, C. L.

AU - Kwon, Y. J.

N1 - Funding Information: We thank Professor Fu-sheng Yu for useful discussions and comments. Y. B. L. acknowledges the support from the China Scholarship Council (201706010043). We thank the KEKB group for excellent operation of the accelerator; the KEK cryogenics group for efficient solenoid operations; and the KEK computer group, the NII, and PNNL/EMSL for valuable computing and SINET5 network support. We acknowledge support from MEXT, JSPS and Nagoya’s TLPRC (Japan); ARC (Australia); FWF (Austria); the National Natural Science Foundation of China under Contracts No. 11475187, No. 11521505, No. 11575017, No. 11761141009; the CAS Center for Excellence in Particle Physics (CCEPP); MSMT (Czechia); CZF, DFG, EXC153, and VS (Germany); DST (India); INFN (Italy); MOE, MSIP, NRF, RSRI, FLRFAS project and GSDC of KISTI and KREONET/GLORIAD (Korea); MNiSW and NCN (Poland); MSHE, Agreement No. 14.W03.31.0026 (Russia); ARRS (Slovenia); IKERBASQUE (Spain); SNSF (Switzerland); MOE and MOST (Taiwan); and DOE and NSF (U.S.). Publisher Copyright: © 2019 Authors. Published by the American Physical Society.

PY - 2019/2/25

Y1 - 2019/2/25

N2 - We present the first measurements of absolute branching fractions of Ξc0 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-Ξc0 using a missing-mass technique; the result is B(B-→Λ̄c-Ξc0)=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc0)B(Ξc0→Ξ-π+), B(B-→Λ̄c-Ξc0)B(Ξc0→ΛK-π+), and B(B-→Λ̄c-Ξc0)B(Ξc0→pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc0 yields the following branching fractions: B(Ξc0→Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc0→ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc0→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(Ξc0→Ξ-π+) can be combined with Ξc0 branching fractions measured relative to Ξc0→Ξ-π+ to yield other absolute Ξc0 branching fractions.

AB - We present the first measurements of absolute branching fractions of Ξc0 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-Ξc0 using a missing-mass technique; the result is B(B-→Λ̄c-Ξc0)=(9.51±2.10±0.88)×10-4. We subsequently measure the product branching fractions B(B-→Λ̄c-Ξc0)B(Ξc0→Ξ-π+), B(B-→Λ̄c-Ξc0)B(Ξc0→ΛK-π+), and B(B-→Λ̄c-Ξc0)B(Ξc0→pK-K-π+) with improved precision. Dividing these product branching fractions by the result for B-→Λ̄c-Ξc0 yields the following branching fractions: B(Ξc0→Ξ-π+)=(1.80±0.50±0.14)%, B(Ξc0→ΛK-π+)=(1.17±0.37±0.09)%, and B(Ξc0→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(Ξc0→Ξ-π+) can be combined with Ξc0 branching fractions measured relative to Ξc0→Ξ-π+ to yield other absolute Ξc0 branching fractions.

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U2 - 10.1103/PhysRevLett.122.082001

DO - 10.1103/PhysRevLett.122.082001

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