Observation of a new charmed baryon

H. Albrecht; H. Ehrlichmann; T. Hamacher; R. P. Hofmann; T. Kirchhoff; A. Nau; S. Nowak; H. Schröder; H. D. Schulz; M. Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; A. Lange; A. Lindner; R. Mankel; M. Schieber; T. Siegmund; B. Spaan; H. Thurn; D. Töpfer; D. Wegener; M. Bittner; P. Eckstein; M. Paulini; K. Reim; H. Wegener; R. Eckmann; R. Mundt; T. Oest; R. Reiner; W. Schmidt-Parzefall; J. Stiewe; S. Werner; K. Ehret; W. Hofmann; A. Hüpper; S. Khan; K. T. Knöpfle; M. Seeger; J. Spengler; D. I. Britton; C. E.K. Charlesworth; K. W. Edwards; E. R.F. Hyatt; P. Krieger; D. B. MacFarlane; P. M. Patel; J. D. Prentice; P. R.B. Saull; K. Tzamariudaki; R. G. Van de Water; T. S. Yoon; D. Reßing; M. Schmidtler; M. Schneider; K. R. Schubert; K. Strahl; R. Waldi; S. Weseler; G. Kernel; P. Križan; E. Križnič; T. Podobnik; T. Živko; V. Balagura; I. Belyaev; S. Chechelnitsky; M. Danilov; A. Droutskoy; Yu Gershtein; A. Golutvin; I. Korolko; G. Kostina; D. Litvintsev; V. Lubimov; P. Pakhlov; S. Semenov; A. Snizhko; I. Tichomirov; Yu Zaitsev

doi:10.1016/0370-2693(93)91598-H

Observation of a new charmed baryon

H. Albrecht, H. Ehrlichmann, T. Hamacher, R. P. Hofmann, T. Kirchhoff, A. Nau, S. Nowak, H. Schröder, H. D. Schulz, M. Walter, R. Wurth, C. Hast, H. Kapitza, H. Kolanoski, A. Kosche, A. Lange, A. Lindner, R. Mankel, M. Schieber, T. SiegmundB. Spaan, H. Thurn, D. Töpfer, D. Wegener, M. Bittner, P. Eckstein, M. Paulini, K. Reim, H. Wegener, R. Eckmann, R. Mundt, T. Oest, R. Reiner, W. Schmidt-Parzefall, J. Stiewe, S. Werner, K. Ehret, W. Hofmann, A. Hüpper, S. Khan, K. T. Knöpfle, M. Seeger, J. Spengler, D. I. Britton, C. E.K. Charlesworth, K. W. Edwards, E. R.F. Hyatt, P. Krieger, D. B. MacFarlane, P. M. Patel, J. D. Prentice, P. R.B. Saull, K. Tzamariudaki, R. G. Van de Water, T. S. Yoon, D. Reßing, M. Schmidtler, M. Schneider, K. R. Schubert, K. Strahl, R. Waldi, S. Weseler, G. Kernel, P. Križan, E. Križnič, T. Podobnik, T. Živko, V. Balagura, I. Belyaev, S. Chechelnitsky, M. Danilov, A. Droutskoy, Yu Gershtein, A. Golutvin, I. Korolko, G. Kostina, D. Litvintsev, V. Lubimov, P. Pakhlov, S. Semenov, A. Snizhko, I. Tichomirov, Yu Zaitsev

School of Arts and Sciences, Physics & Astronomy

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Abstract

Using the ARGUS detector at the e⁺e^- storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λ_c⁺π⁺π^-. (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/c². The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/c² at 90% CL.

Original language	English (US)
Pages (from-to)	227-232
Number of pages	6
Journal	Physics Letters B
Volume	317
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(93)91598-H
State	Published - Nov 4 1993

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/0370-2693(93)91598-H

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Albrecht, H., Ehrlichmann, H., Hamacher, T., Hofmann, R. P., Kirchhoff, T., Nau, A., Nowak, S., Schröder, H., Schulz, H. D., Walter, M., Wurth, R., Hast, C., Kapitza, H., Kolanoski, H., Kosche, A., Lange, A., Lindner, A., Mankel, R., Schieber, M., ... Zaitsev, Y. (1993). Observation of a new charmed baryon. Physics Letters B, 317(1-2), 227-232. https://doi.org/10.1016/0370-2693(93)91598-H

@article{8a22f2d95dc446f091fb8840466205d2,

title = "Observation of a new charmed baryon",

abstract = "Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λc+π+π-. (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/c2. The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/c2 at 90% CL.",

author = "H. Albrecht and H. Ehrlichmann and T. Hamacher and Hofmann, {R. P.} and T. Kirchhoff and A. Nau and S. Nowak and H. Schr{\"o}der and Schulz, {H. D.} and M. Walter and R. Wurth and C. Hast and H. Kapitza and H. Kolanoski and A. Kosche and A. Lange and A. Lindner and R. Mankel and M. Schieber and T. Siegmund and B. Spaan and H. Thurn and D. T{\"o}pfer and D. Wegener and M. Bittner and P. Eckstein and M. Paulini and K. Reim and H. Wegener and R. Eckmann and R. Mundt and T. Oest and R. Reiner and W. Schmidt-Parzefall and J. Stiewe and S. Werner and K. Ehret and W. Hofmann and A. H{\"u}pper and S. Khan and Kn{\"o}pfle, {K. T.} and M. Seeger and J. Spengler and Britton, {D. I.} and Charlesworth, {C. E.K.} and Edwards, {K. W.} and Hyatt, {E. R.F.} and P. Krieger and MacFarlane, {D. B.} and Patel, {P. M.} and Prentice, {J. D.} and Saull, {P. R.B.} and K. Tzamariudaki and {Van de Water}, {R. G.} and Yoon, {T. S.} and D. Re{\ss}ing and M. Schmidtler and M. Schneider and Schubert, {K. R.} and K. Strahl and R. Waldi and S. Weseler 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 V. Balagura and I. Belyaev and S. Chechelnitsky and M. Danilov and A. Droutskoy and Yu Gershtein and A. Golutvin and I. Korolko and G. Kostina and D. Litvintsev and V. Lubimov and P. Pakhlov and S. Semenov and A. Snizhko and I. Tichomirov and Yu Zaitsev",

note = "Funding Information: Substantial progress has been made in charmed baryon physics during the last decade. Production of the A + in e+e - annihilations was first observed by the MARK II Collaboration \[1 \], followed by the neutral and doubly charged isospin partners 27° and 27~++ of the 27c isotriplet observed by the ARGUS \[2\] collaboration, and the ,~o and ~+, seen by the CLEO \[3\]a nd ARGUS \[4\]c ollaborations. Last year the ARGUS collaboration reported the first evidence for the doubly strange charmed baryon/20 in e + e-annihilations \[5\]. Thus, most ground state baryons containing one c-quark have been established. Here we present a search for an excited charmed baryon resonance A~ + in the final state A~+n+n-. This l DESY, IfH Zeuthen. 2 Supported by the German Bundesministerium fiir Forschung und Technologie under contract number 054DO51P. 3 Supported by the German Bundesministerium fiir Forschung und Technologie, under contract number 055DD11P. 4 Supported by the German Bundesministerium fiir Forschung und Technologie under contract number 054ERI2P. 5 Supported by the German Bundesministerium ffir Forschung und Technologic under contract number 055HD21P. 6 McGill University, Montreal, Quebec, Canada. 7 University of Toronto, Toronto, Ontario, Canada. s Carleton University, Ottawa, Ontario, Canada. 9 Supported by the Natural Sciences and Engineering Re-search Council Canada. 10 Supported by the German Bundesministerium fdr Forschung und Technologic under contract number 054KA17P. iI Supported by the Department of Science and Technology of the Republic of Slovenia and the Internationales Btiro KfA, Jiilich.",

year = "1993",

month = nov,

day = "4",

doi = "10.1016/0370-2693(93)91598-H",

language = "English (US)",

volume = "317",

pages = "227--232",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-2",

}

Albrecht, H, Ehrlichmann, H, Hamacher, T, Hofmann, RP, Kirchhoff, T, Nau, A, Nowak, S, Schröder, H, Schulz, HD, Walter, M, Wurth, R, Hast, C, Kapitza, H, Kolanoski, H, Kosche, A, Lange, A, Lindner, A, Mankel, R, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Töpfer, D, Wegener, D, Bittner, M, Eckstein, P, Paulini, M, Reim, K, Wegener, H, Eckmann, R, Mundt, R, Oest, T, Reiner, R, Schmidt-Parzefall, W, Stiewe, J, Werner, S, Ehret, K, Hofmann, W, Hüpper, A, Khan, S, Knöpfle, KT, Seeger, M, Spengler, J, Britton, DI, Charlesworth, CEK, Edwards, KW, Hyatt, ERF, Krieger, P, MacFarlane, DB, Patel, PM, Prentice, JD, Saull, PRB, Tzamariudaki, K, Van de Water, RG, Yoon, TS, Reßing, D, Schmidtler, M, Schneider, M, Schubert, KR, Strahl, K, Waldi, R, Weseler, S, Kernel, G, Križan, P, Križnič, E, Podobnik, T, Živko, T, Balagura, V, Belyaev, I, Chechelnitsky, S, Danilov, M, Droutskoy, A, Gershtein, Y, Golutvin, A, Korolko, I, Kostina, G, Litvintsev, D, Lubimov, V, Pakhlov, P, Semenov, S, Snizhko, A, Tichomirov, I & Zaitsev, Y 1993, 'Observation of a new charmed baryon', Physics Letters B, vol. 317, no. 1-2, pp. 227-232. https://doi.org/10.1016/0370-2693(93)91598-H

TY - JOUR

T1 - Observation of a new charmed baryon

AU - Albrecht, H.

AU - Ehrlichmann, H.

AU - Hamacher, T.

AU - Hofmann, R. P.

AU - Kirchhoff, T.

AU - Nau, A.

AU - Nowak, S.

AU - Schröder, H.

AU - Schulz, H. D.

AU - Walter, M.

AU - Wurth, R.

AU - Hast, C.

AU - Kapitza, H.

AU - Kolanoski, H.

AU - Kosche, A.

AU - Lange, A.

AU - Lindner, A.

AU - Mankel, R.

AU - Schieber, M.

AU - Siegmund, T.

AU - Spaan, B.

AU - Thurn, H.

AU - Töpfer, D.

AU - Wegener, D.

AU - Bittner, M.

AU - Eckstein, P.

AU - Paulini, M.

AU - Reim, K.

AU - Wegener, H.

AU - Eckmann, R.

AU - Mundt, R.

AU - Oest, T.

AU - Reiner, R.

AU - Schmidt-Parzefall, W.

AU - Stiewe, J.

AU - Werner, S.

AU - Ehret, K.

AU - Hofmann, W.

AU - Hüpper, A.

AU - Khan, S.

AU - Knöpfle, K. T.

AU - Seeger, M.

AU - Spengler, J.

AU - Britton, D. I.

AU - Charlesworth, C. E.K.

AU - Edwards, K. W.

AU - Hyatt, E. R.F.

AU - Krieger, P.

AU - MacFarlane, D. B.

AU - Patel, P. M.

AU - Prentice, J. D.

AU - Saull, P. R.B.

AU - Tzamariudaki, K.

AU - Van de Water, R. G.

AU - Yoon, T. S.

AU - Reßing, D.

AU - Schmidtler, M.

AU - Schneider, M.

AU - Schubert, K. R.

AU - Strahl, K.

AU - Waldi, R.

AU - Weseler, S.

AU - Kernel, G.

AU - Križan, P.

AU - Križnič, E.

AU - Podobnik, T.

AU - Živko, T.

AU - Balagura, V.

AU - Belyaev, I.

AU - Chechelnitsky, S.

AU - Danilov, M.

AU - Droutskoy, A.

AU - Gershtein, Yu

AU - Golutvin, A.

AU - Korolko, I.

AU - Kostina, G.

AU - Litvintsev, D.

AU - Lubimov, V.

AU - Pakhlov, P.

AU - Semenov, S.

AU - Snizhko, A.

AU - Tichomirov, I.

AU - Zaitsev, Yu

N1 - Funding Information: Substantial progress has been made in charmed baryon physics during the last decade. Production of the A + in e+e - annihilations was first observed by the MARK II Collaboration \[1 \], followed by the neutral and doubly charged isospin partners 27° and 27~++ of the 27c isotriplet observed by the ARGUS \[2\] collaboration, and the ,~o and ~+, seen by the CLEO \[3\]a nd ARGUS \[4\]c ollaborations. Last year the ARGUS collaboration reported the first evidence for the doubly strange charmed baryon/20 in e + e-annihilations \[5\]. Thus, most ground state baryons containing one c-quark have been established. Here we present a search for an excited charmed baryon resonance A~ + in the final state A~+n+n-. This l DESY, IfH Zeuthen. 2 Supported by the German Bundesministerium fiir Forschung und Technologie under contract number 054DO51P. 3 Supported by the German Bundesministerium fiir Forschung und Technologie, under contract number 055DD11P. 4 Supported by the German Bundesministerium fiir Forschung und Technologie under contract number 054ERI2P. 5 Supported by the German Bundesministerium ffir Forschung und Technologic under contract number 055HD21P. 6 McGill University, Montreal, Quebec, Canada. 7 University of Toronto, Toronto, Ontario, Canada. s Carleton University, Ottawa, Ontario, Canada. 9 Supported by the Natural Sciences and Engineering Re-search Council Canada. 10 Supported by the German Bundesministerium fdr Forschung und Technologic under contract number 054KA17P. iI Supported by the Department of Science and Technology of the Republic of Slovenia and the Internationales Btiro KfA, Jiilich.

PY - 1993/11/4

Y1 - 1993/11/4

N2 - Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λc+π+π-. (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/c2. The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/c2 at 90% CL.

AB - Using the ARGUS detector at the e+e- storage ring DORIS II at DESY, we have observed a new charmed baryon state in the channel Λc+π+π-. (All references to a specific charged state also imply the charge conjugate state.) The mass of this state was measured to be (2626.6 ± 0.5 ± 1.5) MeV/c2. The product of the production cross section and branching ratio for this channel was determined to be (11.5 ± 2.5 ± 3.0) pb, and the natural width estimated to be smaller than 3.2 MeV/c2 at 90% CL.

UR - http://www.scopus.com/inward/record.url?scp=0007062044&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0007062044&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(93)91598-H

DO - 10.1016/0370-2693(93)91598-H

M3 - Article

AN - SCOPUS:0007062044

VL - 317

SP - 227

EP - 232

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 -

Observation of a new charmed baryon

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