Observation of Cabibbo-suppressed and W-exchange Λc + baryon decays

Belle Collaboration

doi:10.1016/S0370-2693(01)01373-9

Observation of Cabibbo-suppressed and W-exchange Λ_c ⁺ baryon decays

Belle Collaboration

Research output: Contribution to journal › Article

26 Citations (Scopus)

Abstract

We present measurements of the Cabibbo-suppressed decays Λ ⁺ _c → Λ⁰K ⁺ and Λ ⁺ _c → Λ⁰K ⁺ (both first observations), Λ ⁺ _c → Λ ⁺ K ⁺ π ^- (seen with large statistics for the first time), Λ ⁺ _c → _pK ⁺ K ^- and Λ ⁺ _c → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λ ⁺ _c → Λ ⁺ K ⁺ K ^- and Λ ⁺ _c → Λ ⁺ φ, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for {equation presented} and set an upper limit on the non-resonant decay Λ ⁺ _c → Λ ⁺ K ⁺ K^-. This analysis was performed using 32.6 fb^-1 of data collected by the Belle detector at the asymmetric e ⁺ e ^- collider KEKB.

Original language	English
Pages (from-to)	33-43
Number of pages	11
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	524
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(01)01373-9
Publication status	Published - Jan 3 2002
Externally published	Yes

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baryons

decay

diagrams

statistics

detectors

Keywords

Cabibbo-suppressed
Charmed baryon
W-exchange

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

Belle Collaboration (2002). Observation of Cabibbo-suppressed and W-exchange Λ_c ⁺ baryon decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 524(1-2), 33-43. https://doi.org/10.1016/S0370-2693(01)01373-9

Observation of Cabibbo-suppressed and W-exchange Λ_c ⁺ baryon decays. / Belle Collaboration.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 524, No. 1-2, 03.01.2002, p. 33-43.

Research output: Contribution to journal › Article

Belle Collaboration 2002, 'Observation of Cabibbo-suppressed and W-exchange Λ_c ⁺ baryon decays', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 524, no. 1-2, pp. 33-43. https://doi.org/10.1016/S0370-2693(01)01373-9

Belle Collaboration. Observation of Cabibbo-suppressed and W-exchange Λ_c ⁺ baryon decays. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2002 Jan 3;524(1-2):33-43. https://doi.org/10.1016/S0370-2693(01)01373-9

Belle Collaboration. / Observation of Cabibbo-suppressed and W-exchange Λ_c ⁺ baryon decays. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2002 ; Vol. 524, No. 1-2. pp. 33-43.

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title = "Observation of Cabibbo-suppressed and W-exchange Λc + baryon decays",

abstract = "We present measurements of the Cabibbo-suppressed decays Λ + c → Λ0K + and Λ + c → Λ0K + (both first observations), Λ + c → Λ + K + π - (seen with large statistics for the first time), Λ + c → pK + K - and Λ + c → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λ + c → Λ + K + K - and Λ + c → Λ + φ, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for {equation presented} and set an upper limit on the non-resonant decay Λ + c → Λ + K + K-. This analysis was performed using 32.6 fb-1 of data collected by the Belle detector at the asymmetric e + e - collider KEKB.",

keywords = "Cabibbo-suppressed, Charmed baryon, W-exchange",

author = "{Belle Collaboration} and K. Abe and K. Abe and R. Abe and T. Abe and I. Adachi and Ahn, {Byoung Sup} and H. Aihara and M. Akatsu and Y. Asano and T. Aso and V. Aulchenko and T. Aushev and Bakich, {A. M.} and Y. Ban and E. Banas and S. Behari and Behera, {P. K.} and A. Bondar and A. Bozek and Browder, {T. E.} and Casey, {B. C.K.} and P. Chang and Y. Chao and Cheon, {B. G.} and R. Chistov and Choi, {S. K.} and Y. Choi and Dong, {L. Y.} and A. Drutskoy and S. Eidelman and V. Eiges and Y. Enari and F. Fang and H. Fujii and C. Fukunaga and M. Fukushima and N. Gabyshev and A. Garmash and T. Gershon and A. Gordon and R. Guo and J. Haba and H. Hamasaki and F. Handa and K. Hara and T. Hara and Hastings, {N. C.} and H. Hayashii and M. Hazumi and Hirokazu Ishino",

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AU - Belle Collaboration

AU - Abe, K.

AU - Abe, R.

AU - Abe, T.

AU - Adachi, I.

AU - Ahn, Byoung Sup

AU - Aihara, H.

AU - Akatsu, M.

AU - Asano, Y.

AU - Aso, T.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Bakich, A. M.

AU - Ban, Y.

AU - Banas, E.

AU - Behari, S.

AU - Behera, P. K.

AU - Bondar, A.

AU - Bozek, A.

AU - Browder, T. E.

AU - Casey, B. C.K.

AU - Chang, P.

AU - Chao, Y.

AU - Cheon, B. G.

AU - Chistov, R.

AU - Choi, S. K.

AU - Choi, Y.

AU - Dong, L. Y.

AU - Drutskoy, A.

AU - Eidelman, S.

AU - Eiges, V.

AU - Enari, Y.

AU - Fang, F.

AU - Fujii, H.

AU - Fukunaga, C.

AU - Fukushima, M.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gershon, T.

AU - Gordon, A.

AU - Guo, R.

AU - Haba, J.

AU - Hamasaki, H.

AU - Handa, F.

AU - Hara, K.

AU - Hara, T.

AU - Hastings, N. C.

AU - Hayashii, H.

AU - Hazumi, M.

AU - Ishino, Hirokazu

PY - 2002/1/3

Y1 - 2002/1/3

N2 - We present measurements of the Cabibbo-suppressed decays Λ + c → Λ0K + and Λ + c → Λ0K + (both first observations), Λ + c → Λ + K + π - (seen with large statistics for the first time), Λ + c → pK + K - and Λ + c → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λ + c → Λ + K + K - and Λ + c → Λ + φ, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for {equation presented} and set an upper limit on the non-resonant decay Λ + c → Λ + K + K-. This analysis was performed using 32.6 fb-1 of data collected by the Belle detector at the asymmetric e + e - collider KEKB.

AB - We present measurements of the Cabibbo-suppressed decays Λ + c → Λ0K + and Λ + c → Λ0K + (both first observations), Λ + c → Λ + K + π - (seen with large statistics for the first time), Λ + c → pK + K - and Λ + c → pφ (measured with improved accuracy). Improved branching ratio measurements for the decays Λ + c → Λ + K + K - and Λ + c → Λ + φ, which are attributed to W-exchange diagrams, are shown. We also present the first evidence for {equation presented} and set an upper limit on the non-resonant decay Λ + c → Λ + K + K-. This analysis was performed using 32.6 fb-1 of data collected by the Belle detector at the asymmetric e + e - collider KEKB.

KW - Cabibbo-suppressed

KW - Charmed baryon

KW - W-exchange

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U2 - 10.1016/S0370-2693(01)01373-9

DO - 10.1016/S0370-2693(01)01373-9

M3 - Article

VL - 524

SP - 33

EP - 43

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -

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10.1016/S0370-2693(01)01373-9