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

Belle Collaboration

Research output: Contribution to journalArticle

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 +cpK + 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 languageEnglish
Pages (from-to)33-43
Number of pages11
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume524
Issue number1-2
DOIs
Publication statusPublished - 2002 Jan 3

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baryons
decay
diagrams
statistics
detectors

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

Cite this

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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.",
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 Youngjoon Kwon",
year = "2002",
month = "1",
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language = "English",
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Observation of Cabibbo-suppressed and W-exchange Λc + 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 journalArticle

TY - JOUR

T1 - Observation of Cabibbo-suppressed and W-exchange Λc + baryon decays

AU - Belle Collaboration

AU - Abe, K.

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 - Kwon, Youngjoon

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.

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

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

M3 - Article

AN - SCOPUS:0037011872

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 -