Observations of Λc+ semileptonic decay

H. Albrecht; H. Ehrlichmann; T. Hamacher; A. Krüger; A. Nau; A. Nippe; M. Reidenbach; M. Schäfer; H. Schröder; H. D. Schulz; F. Sefkow; R. Wurth; R. D. Appuhn; C. Hast; G. Herrera; H. Kolanoski; A. Lange; A. Linder; R. Mankel; M. Schieber; T. Siegmund; B. Spaan; H. Thurn; D. Töpfer; A. Walther; D. Wegener; M. Paulini; K. Reim; U. Volland; H. Wegener; R. Mundt; T. Oest; W. Schmidt-Parzefall; W. Funk; J. Stiewe; S. Werner; S. Ball; J. C. Gabriel; C. Geyer; A. Hölscher; W. Hofmann; B. Holzer; S. Khan; K. T. Knöpfle; J. Spengler; D. I. Britton; C. E.K. Charlesworth; K. W. Edwards; H. Kapitza; P. Krieger; R. Kutschke; D. B. MacFarlane; R. S. Orr; P. M. Patel; J. D. Prentice; S. C. Seidel; G. Tsipolitis; K. Tzamariudaki; R. G. Van De Water; T. S. Yoon; D. Ressing; S. Schael; K. R. Schubert; K. Strahl; R. Waldi; S. Weseler; B. Boštjančič; G. Kernel; P. Križan; E. Križnič; T. Podobnik; T. Živko; H. I. Cronström; L. Jönsson; A. Babaev; V. Balagura; M. Danilov; A. Droutskoy; B. Fominykh; A. Golutvin; I. Gorelov; F. Ratnikov; V. Lubimov; A. Rostovtsev; A. Semenov; S. Semenov; V. Shevchenko; V. Soloshenkp; I. Tichomirov; Yu Zaitsev; R. Childers; C. W. Darden

doi:10.1016/0370-2693(91)91480-J

Observations of Λ_c⁺ semileptonic decay

H. Albrecht
, H. Ehrlichmann
, T. Hamacher
, A. Krüger
, A. Nau
, A. Nippe
, M. Reidenbach
, M. Schäfer
, H. Schröder
, H. D. Schulz
, F. Sefkow
, R. Wurth
, R. D. Appuhn
, C. Hast
, G. Herrera
, H. Kolanoski
, A. Lange
, A. Linder
, R. Mankel
, M. Schieber

T. Siegmund, B. Spaan, H. Thurn, D. Töpfer, A. Walther, D. Wegener, M. Paulini, K. Reim, U. Volland, H. Wegener, R. Mundt, T. Oest, W. Schmidt-Parzefall, W. Funk, J. Stiewe, S. Werner, S. Ball, J. C. Gabriel, C. Geyer, A. Hölscher, W. Hofmann, B. Holzer, S. Khan, K. T. Knöpfle, J. Spengler, D. I. Britton, C. E.K. Charlesworth, K. W. Edwards, H. Kapitza, P. Krieger, R. Kutschke, D. B. MacFarlane, R. S. Orr, P. M. Patel, J. D. Prentice, S. C. Seidel, G. Tsipolitis, K. Tzamariudaki, R. G. Van De Water, T. S. Yoon, D. Ressing, S. Schael, K. R. Schubert, K. Strahl, R. Waldi, S. Weseler, B. Boštjančič, G. Kernel, P. Križan, E. Križnič, T. Podobnik, T. Živko, H. I. Cronström, L. Jönsson, A. Babaev, V. Balagura, M. Danilov, A. Droutskoy, B. Fominykh, A. Golutvin, I. Gorelov, F. Ratnikov, V. Lubimov, A. Rostovtsev, A. Semenov, S. Semenov, V. Shevchenko, V. Soloshenkp, I. Tichomirov, Yu Zaitsev, R. Childers, C. W. Darden

Deutsches Elektronen-Synchrotron (DESY)
pro3dure medical GmbH
Friedrich Alexander Universität Erlangen-Nürnberg
Universität Hamburg
Heidelberg University
Max-Planck-Institut für Kernphysik
Institute of Particle Physics
University of Karlsruhe
Univ. of Ljubljana
Lund University
ITEP
University of South Carolina

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

33 Scopus citations

Abstract

Direct observations of the semileptonic decay of Λ_c⁺ in the decay channels Λ_c⁺→Λe⁺X and Λ_c⁺→Λμ⁺X have been made using the ARGUS detector at the DORIS II e⁺e^- storage ring. The cross section times branching ratio were found to be σ(e⁺e^-→Λ_c⁺ X)·BR(Λ_c⁺→Λe⁺ X)=4.20±1.28±0.71 pb and σ(e⁺e^-→Λ_c⁺ X)·BR(Λ_c⁺→Λμ⁺X)=3.91±2.02±0.90 pb.

Original language	English
Pages (from-to)	234-242
Number of pages	9
Journal	Physics Letters B
Volume	269
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(91)91480-J
State	Published - 24 Oct 1991
Externally published	Yes

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10.1016/0370-2693(91)91480-J

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Albrecht, H., Ehrlichmann, H., Hamacher, T., Krüger, A., Nau, A., Nippe, A., Reidenbach, M., Schäfer, M., Schröder, H., Schulz, H. D., Sefkow, F., Wurth, R., Appuhn, R. D., Hast, C., Herrera, G., Kolanoski, H., Lange, A., Linder, A., Mankel, R., ... Darden, C. W. (1991). Observations of Λ_c⁺ semileptonic decay. Physics Letters B, 269(1-2), 234-242. https://doi.org/10.1016/0370-2693(91)91480-J

@article{3db156487e65434b8e505ba169d54c0f,

title = "Observations of Λc+ semileptonic decay",

abstract = "Direct observations of the semileptonic decay of Λc+ in the decay channels Λc+→Λe+X and Λc+→Λμ+X have been made using the ARGUS detector at the DORIS II e+e- storage ring. The cross section times branching ratio were found to be σ(e+e-→Λc+ X)·BR(Λc+→Λe+ X)=4.20±1.28±0.71 pb and σ(e+e-→Λc+ X)·BR(Λc+→Λμ+ X)=3.91±2.02±0.90 pb.",

author = "H. Albrecht and H. Ehrlichmann and T. Hamacher and A. Kr{\"u}ger and A. Nau and A. Nippe and M. Reidenbach and M. Sch{\"a}fer and H. Schr{\"o}der and Schulz, \{H. D.\} and F. Sefkow and R. Wurth and Appuhn, \{R. D.\} and C. Hast and G. Herrera and H. Kolanoski and A. Lange and A. Linder and R. Mankel and M. Schieber and T. Siegmund and B. Spaan and H. Thurn and D. T{\"o}pfer and A. Walther and D. Wegener and M. Paulini and K. Reim and U. Volland and H. Wegener and R. Mundt and T. Oest and W. Schmidt-Parzefall and W. Funk and J. Stiewe and S. Werner and S. Ball and Gabriel, \{J. C.\} and C. Geyer and A. H{\"o}lscher and W. Hofmann and B. Holzer and S. Khan and Kn{\"o}pfle, \{K. T.\} and J. Spengler and Britton, \{D. I.\} and Charlesworth, \{C. E.K.\} and Edwards, \{K. W.\} and H. Kapitza and P. Krieger and R. Kutschke and MacFarlane, \{D. B.\} and Orr, \{R. S.\} and Patel, \{P. M.\} and Prentice, \{J. D.\} and Seidel, \{S. C.\} and G. Tsipolitis and K. Tzamariudaki and \{Van De Water\}, \{R. G.\} and Yoon, \{T. S.\} and D. Ressing and S. Schael and Schubert, \{K. R.\} and K. Strahl and R. Waldi and S. Weseler and B. Bo{\v s}tjan{\v c}i{\v c} and G. Kernel and P. Kri{\v z}an and E. Kri{\v z}ni{\v c} and T. Podobnik and T. {\v Z}ivko and Cronstr{\"o}m, \{H. I.\} and L. J{\"o}nsson and A. Babaev and V. Balagura and M. Danilov and A. Droutskoy and B. Fominykh and A. Golutvin and I. Gorelov and F. Ratnikov and V. Lubimov and A. Rostovtsev and A. Semenov and S. Semenov and V. Shevchenko and V. Soloshenkp and I. Tichomirov and Yu Zaitsev and R. Childers and Darden, \{C. W.\}",

note = "Funding Information: There has been much effort lately given to theoretical calculations and experimental measurements of semileptonic decay rates of charmed and bottom mesons. The quark model has so far had reasonable success in describing these semileptonic processes \textbackslash{}[1-5 \textbackslash{}]. From this work, one can eventually extract the KM-mixing angles and the quark structure of hadrons described by the various form factors. Thus, it is natural to extend this model to the decay of heavy quark baryons such as A\textasciitilde{}+ . Just as in the semilep-tonic D meson decay, the semileptonic decay of A\textasciitilde{}+ is a spectator process where the Cabibbo-favored decay c\textasciitilde{}s\textasciitilde{}+v\textasciitilde{} dominates. This process occurs, to a good approximation, independently of the spectator u and d quarks. Differences from semileptonic meson calculations arise in parameterizing the hadronic wavefunctions. Recent theoretical work \textbackslash{}[6 -8 \textbackslash{}] has put the Ac+ --,A\textasciitilde{}+v\textasciitilde{} branching ratio between 1.4\% and 4.2\%, depending on the choice of various A\textasciitilde{}+ wave-function models and the nature of the q2 dependen- Supported by the German Bundesministerium f'tir Forschung und Technologie, under contract number 054DO51P. z Supportedb y the German Bundesministerium ftir Forschung und Technologie, under contract number 054ER 12P. 3 Supported by the German Bundesministerium ftir Forschung und Technologie, under contract number 055HD21P. 4 McGillU niversity, Montreal, Quebec, Canada H3A 2T8. 5 University of Toronto, Toronto, Ontario, Canada M5S IA7. 6 Carleton University, Ottawa, Ontario, Canada KIS 5B6. 7 Supported by the Natural Sciences and Engineering Research Council, Canada. s Supported by the German Bundesministerium for Forschung und Technologie, under contract number 054KA17P. 9 Supported by the Department of Science and Technology of the Republic of Slovenia and the Internationales Bfro KfA, Jtilich. \textasciitilde{}o Supported by the Swedish Research Council. \textasciitilde{} Supported by the US Department of Energy, under contract DE-AS09-80ER 10690.",

year = "1991",

month = oct,

day = "24",

doi = "10.1016/0370-2693(91)91480-J",

language = "English",

volume = "269",

pages = "234--242",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1-2",

}

Albrecht, H, Ehrlichmann, H, Hamacher, T, Krüger, A, Nau, A, Nippe, A, Reidenbach, M, Schäfer, M, Schröder, H, Schulz, HD, Sefkow, F, Wurth, R, Appuhn, RD, Hast, C, Herrera, G, Kolanoski, H, Lange, A, Linder, A, Mankel, R, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Töpfer, D, Walther, A, Wegener, D, Paulini, M, Reim, K, Volland, U, Wegener, H, Mundt, R, Oest, T, Schmidt-Parzefall, W, Funk, W, Stiewe, J, Werner, S, Ball, S, Gabriel, JC, Geyer, C, Hölscher, A, Hofmann, W, Holzer, B, Khan, S, Knöpfle, KT, Spengler, J, Britton, DI, Charlesworth, CEK, Edwards, KW, Kapitza, H, Krieger, P, Kutschke, R, MacFarlane, DB, Orr, RS, Patel, PM, Prentice, JD, Seidel, SC, Tsipolitis, G, Tzamariudaki, K, Van De Water, RG, Yoon, TS, Ressing, D, Schael, S, Schubert, KR, Strahl, K, Waldi, R, Weseler, S, Boštjančič, B, Kernel, G, Križan, P, Križnič, E, Podobnik, T, Živko, T, Cronström, HI, Jönsson, L, Babaev, A, Balagura, V, Danilov, M, Droutskoy, A, Fominykh, B, Golutvin, A, Gorelov, I, Ratnikov, F, Lubimov, V, Rostovtsev, A, Semenov, A, Semenov, S, Shevchenko, V, Soloshenkp, V, Tichomirov, I, Zaitsev, Y, Childers, R & Darden, CW 1991, 'Observations of Λ_c⁺ semileptonic decay', Physics Letters B, vol. 269, no. 1-2, pp. 234-242. https://doi.org/10.1016/0370-2693(91)91480-J

TY - JOUR

T1 - Observations of Λc+ semileptonic decay

AU - Albrecht, H.

AU - Ehrlichmann, H.

AU - Hamacher, T.

AU - Krüger, A.

AU - Nau, A.

AU - Nippe, A.

AU - Reidenbach, M.

AU - Schäfer, M.

AU - Schröder, H.

AU - Schulz, H. D.

AU - Sefkow, F.

AU - Wurth, R.

AU - Appuhn, R. D.

AU - Hast, C.

AU - Herrera, G.

AU - Kolanoski, H.

AU - Lange, A.

AU - Linder, A.

AU - Mankel, R.

AU - Schieber, M.

AU - Siegmund, T.

AU - Spaan, B.

AU - Thurn, H.

AU - Töpfer, D.

AU - Walther, A.

AU - Wegener, D.

AU - Paulini, M.

AU - Reim, K.

AU - Volland, U.

AU - Wegener, H.

AU - Mundt, R.

AU - Oest, T.

AU - Schmidt-Parzefall, W.

AU - Funk, W.

AU - Stiewe, J.

AU - Werner, S.

AU - Ball, S.

AU - Gabriel, J. C.

AU - Geyer, C.

AU - Hölscher, A.

AU - Hofmann, W.

AU - Holzer, B.

AU - Khan, S.

AU - Knöpfle, K. T.

AU - Spengler, J.

AU - Britton, D. I.

AU - Charlesworth, C. E.K.

AU - Edwards, K. W.

AU - Kapitza, H.

AU - Krieger, P.

AU - Kutschke, R.

AU - MacFarlane, D. B.

AU - Orr, R. S.

AU - Patel, P. M.

AU - Prentice, J. D.

AU - Seidel, S. C.

AU - Tsipolitis, G.

AU - Tzamariudaki, K.

AU - Van De Water, R. G.

AU - Yoon, T. S.

AU - Ressing, D.

AU - Schael, S.

AU - Schubert, K. R.

AU - Strahl, K.

AU - Waldi, R.

AU - Weseler, S.

AU - Boštjančič, B.

AU - Kernel, G.

AU - Križan, P.

AU - Križnič, E.

AU - Podobnik, T.

AU - Živko, T.

AU - Cronström, H. I.

AU - Jönsson, L.

AU - Babaev, A.

AU - Balagura, V.

AU - Danilov, M.

AU - Droutskoy, A.

AU - Fominykh, B.

AU - Golutvin, A.

AU - Gorelov, I.

AU - Ratnikov, F.

AU - Lubimov, V.

AU - Rostovtsev, A.

AU - Semenov, A.

AU - Semenov, S.

AU - Shevchenko, V.

AU - Soloshenkp, V.

AU - Tichomirov, I.

AU - Zaitsev, Yu

AU - Childers, R.

AU - Darden, C. W.

N1 - Funding Information: There has been much effort lately given to theoretical calculations and experimental measurements of semileptonic decay rates of charmed and bottom mesons. The quark model has so far had reasonable success in describing these semileptonic processes \[1-5 \]. From this work, one can eventually extract the KM-mixing angles and the quark structure of hadrons described by the various form factors. Thus, it is natural to extend this model to the decay of heavy quark baryons such as A~+ . Just as in the semilep-tonic D meson decay, the semileptonic decay of A~+ is a spectator process where the Cabibbo-favored decay c~s~+v~ dominates. This process occurs, to a good approximation, independently of the spectator u and d quarks. Differences from semileptonic meson calculations arise in parameterizing the hadronic wavefunctions. Recent theoretical work \[6 -8 \] has put the Ac+ --,A~+v~ branching ratio between 1.4% and 4.2%, depending on the choice of various A~+ wave-function models and the nature of the q2 dependen- Supported by the German Bundesministerium f'tir Forschung und Technologie, under contract number 054DO51P. z Supportedb y the German Bundesministerium ftir Forschung und Technologie, under contract number 054ER 12P. 3 Supported by the German Bundesministerium ftir Forschung und Technologie, under contract number 055HD21P. 4 McGillU niversity, Montreal, Quebec, Canada H3A 2T8. 5 University of Toronto, Toronto, Ontario, Canada M5S IA7. 6 Carleton University, Ottawa, Ontario, Canada KIS 5B6. 7 Supported by the Natural Sciences and Engineering Research Council, Canada. s Supported by the German Bundesministerium for Forschung und Technologie, under contract number 054KA17P. 9 Supported by the Department of Science and Technology of the Republic of Slovenia and the Internationales Bfro KfA, Jtilich. ~o Supported by the Swedish Research Council. ~ Supported by the US Department of Energy, under contract DE-AS09-80ER 10690.

PY - 1991/10/24

Y1 - 1991/10/24

N2 - Direct observations of the semileptonic decay of Λc+ in the decay channels Λc+→Λe+X and Λc+→Λμ+X have been made using the ARGUS detector at the DORIS II e+e- storage ring. The cross section times branching ratio were found to be σ(e+e-→Λc+ X)·BR(Λc+→Λe+ X)=4.20±1.28±0.71 pb and σ(e+e-→Λc+ X)·BR(Λc+→Λμ+ X)=3.91±2.02±0.90 pb.

AB - Direct observations of the semileptonic decay of Λc+ in the decay channels Λc+→Λe+X and Λc+→Λμ+X have been made using the ARGUS detector at the DORIS II e+e- storage ring. The cross section times branching ratio were found to be σ(e+e-→Λc+ X)·BR(Λc+→Λe+ X)=4.20±1.28±0.71 pb and σ(e+e-→Λc+ X)·BR(Λc+→Λμ+ X)=3.91±2.02±0.90 pb.

UR - https://www.scopus.com/pages/publications/0000264219

U2 - 10.1016/0370-2693(91)91480-J

DO - 10.1016/0370-2693(91)91480-J

M3 - Article

AN - SCOPUS:0000264219

SN - 0370-2693

VL - 269

SP - 234

EP - 242

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Observations of Λ_c⁺ semileptonic decay

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