Photoproduction of the Λc charmed baryon

M. P. Alvarez; R. Barate; D. Bloch; P. Bonamy; P. Borgeaud; M. Burchell; H. Burmeister; J. M. Brunet; F. Calvino; M. Cattaneo; J. M. Crespo; B. d'Almagne; M. David; L. DiCiaccio; J. Dixon; P. Druet; A. Duane; J. P. Engel; A. Ferrer; T. A. Filippas; E. Fokitis; R. W. Forty; P. Foucault; E. N. Gazis; J. P. Gerber; Y. Giomataris; T. Hofmokl; E. C. Katsoufis; M. Koratzinos; C. Krafft; B. Lefievre; Y. Lemoigne; A. Lopez; W. K. Lui; C. Magneville; A. Maltezos; J. G. McEwen; Th Papadopoulou; B. Pattison; D. Poutot; M. Primout; H. Rahmani; P. Roudeau; C. Seez; J. Six; R. Strub; D. Treille; P. Triscos; G. Tristram; G. Villet; A. Volte; M. Wayne; D. M. Websdale; G. Wormser; Y. Zolnierowski

doi:10.1016/0370-2693(90)91342-9

Photoproduction of the Λc charmed baryon

M. P. Alvarez, R. Barate, D. Bloch, P. Bonamy, P. Borgeaud, M. Burchell, H. Burmeister, J. M. Brunet, F. Calvino, M. Cattaneo, J. M. Crespo, B. d'Almagne, M. David, L. DiCiaccio, J. Dixon, P. Druet, A. Duane, J. P. Engel, A. Ferrer, T. A. FilippasE. Fokitis, R. W. Forty, P. Foucault, E. N. Gazis, J. P. Gerber, Y. Giomataris, T. Hofmokl, E. C. Katsoufis, M. Koratzinos, C. Krafft, B. Lefievre, Y. Lemoigne, A. Lopez, W. K. Lui, C. Magneville, A. Maltezos, J. G. McEwen, Th Papadopoulou, B. Pattison, D. Poutot, M. Primout, H. Rahmani, P. Roudeau, C. Seez, J. Six, R. Strub, D. Treille, P. Triscos, G. Tristram, G. Villet, A. Volte, M. Wayne, D. M. Websdale, G. Wormser, Y. Zolnierowski

Department of Physics

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Abstract

In a photoproduction experiment using a mean photon energy of 100 GeV we have observed 29±8 Λc(Λc) charmed-baryon and antibaryon decays in the pK-π+ (pK+π-) final state. Quasi two-body final states do not contribite significantly to this channel. The mass of the Λc was measured to be 2281.7±2.7±2.6 MeV/c2 and its lifetime 0.18±0.03±0.03 ps. The ratio of Λc D production, measured in this experiment, is significantly greater than that predicted by photon-gluon fusion and using a Lund model to describe the hadronization. This excess cannot be completely accounted for in this model, even using a Λc branching fraction in pKπ as high as 5%. © 1990.

Original language	English
Pages (from-to)	256-260
Journal	Physics Letters B
Volume	246
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(90)91342-9
Publication status	Published - 23 Aug 1990

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Alvarez, M. P., Barate, R., Bloch, D., Bonamy, P., Borgeaud, P., Burchell, M., Burmeister, H., Brunet, J. M., Calvino, F., Cattaneo, M., Crespo, J. M., d'Almagne, B., David, M., DiCiaccio, L., Dixon, J., Druet, P., Duane, A., Engel, J. P., Ferrer, A., ... Zolnierowski, Y. (1990). Photoproduction of the Λc charmed baryon. Physics Letters B, 246(1-2), 256-260. https://doi.org/10.1016/0370-2693(90)91342-9

@article{bf41d0064ae3417e8f2e6ecf7da2e669,

title = "Photoproduction of the Λc charmed baryon",

abstract = "In a photoproduction experiment using a mean photon energy of 100 GeV we have observed 29±8 Λc(Λc) charmed-baryon and antibaryon decays in the pK-π+ (pK+π-) final state. Quasi two-body final states do not contribite significantly to this channel. The mass of the Λc was measured to be 2281.7±2.7±2.6 MeV/c2 and its lifetime 0.18±0.03±0.03 ps. The ratio of Λc D production, measured in this experiment, is significantly greater than that predicted by photon-gluon fusion and using a Lund model to describe the hadronization. This excess cannot be completely accounted for in this model, even using a Λc branching fraction in pKπ as high as 5%. {\textcopyright} 1990.",

author = "Alvarez, {M. P.} and R. Barate and D. Bloch and P. Bonamy and P. Borgeaud and M. Burchell and H. Burmeister and Brunet, {J. M.} and F. Calvino and M. Cattaneo and Crespo, {J. M.} and B. d'Almagne and M. David and L. DiCiaccio and J. Dixon and P. Druet and A. Duane and Engel, {J. P.} and A. Ferrer and Filippas, {T. A.} and E. Fokitis and Forty, {R. W.} and P. Foucault and Gazis, {E. N.} and Gerber, {J. P.} and Y. Giomataris and T. Hofmokl and Katsoufis, {E. C.} and M. Koratzinos and C. Krafft and B. Lefievre and Y. Lemoigne and A. Lopez and Lui, {W. K.} and C. Magneville and A. Maltezos and McEwen, {J. G.} and Th Papadopoulou and B. Pattison and D. Poutot and M. Primout and H. Rahmani and P. Roudeau and C. Seez and J. Six and R. Strub and D. Treille and P. Triscos and G. Tristram and G. Villet and A. Volte and M. Wayne and Websdale, {D. M.} and G. Wormser and Y. Zolnierowski",

year = "1990",

month = aug,

day = "23",

doi = "10.1016/0370-2693(90)91342-9",

language = "English",

volume = "246",

pages = "256--260",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-2",

}

Alvarez, MP, Barate, R, Bloch, D, Bonamy, P, Borgeaud, P, Burchell, M, Burmeister, H, Brunet, JM, Calvino, F, Cattaneo, M, Crespo, JM, d'Almagne, B, David, M, DiCiaccio, L, Dixon, J, Druet, P, Duane, A, Engel, JP, Ferrer, A, Filippas, TA, Fokitis, E, Forty, RW, Foucault, P, Gazis, EN, Gerber, JP, Giomataris, Y, Hofmokl, T, Katsoufis, EC, Koratzinos, M, Krafft, C, Lefievre, B, Lemoigne, Y, Lopez, A, Lui, WK, Magneville, C, Maltezos, A, McEwen, JG, Papadopoulou, T, Pattison, B, Poutot, D, Primout, M, Rahmani, H, Roudeau, P, Seez, C, Six, J, Strub, R, Treille, D, Triscos, P, Tristram, G, Villet, G, Volte, A, Wayne, M, Websdale, DM, Wormser, G & Zolnierowski, Y 1990, 'Photoproduction of the Λc charmed baryon', Physics Letters B, vol. 246, no. 1-2, pp. 256-260. https://doi.org/10.1016/0370-2693(90)91342-9

TY - JOUR

T1 - Photoproduction of the Λc charmed baryon

AU - Alvarez, M. P.

AU - Barate, R.

AU - Bloch, D.

AU - Bonamy, P.

AU - Borgeaud, P.

AU - Burchell, M.

AU - Burmeister, H.

AU - Brunet, J. M.

AU - Calvino, F.

AU - Cattaneo, M.

AU - Crespo, J. M.

AU - d'Almagne, B.

AU - David, M.

AU - DiCiaccio, L.

AU - Dixon, J.

AU - Druet, P.

AU - Duane, A.

AU - Engel, J. P.

AU - Ferrer, A.

AU - Filippas, T. A.

AU - Fokitis, E.

AU - Forty, R. W.

AU - Foucault, P.

AU - Gazis, E. N.

AU - Gerber, J. P.

AU - Giomataris, Y.

AU - Hofmokl, T.

AU - Katsoufis, E. C.

AU - Koratzinos, M.

AU - Krafft, C.

AU - Lefievre, B.

AU - Lemoigne, Y.

AU - Lopez, A.

AU - Lui, W. K.

AU - Magneville, C.

AU - Maltezos, A.

AU - McEwen, J. G.

AU - Papadopoulou, Th

AU - Pattison, B.

AU - Poutot, D.

AU - Primout, M.

AU - Rahmani, H.

AU - Roudeau, P.

AU - Seez, C.

AU - Six, J.

AU - Strub, R.

AU - Treille, D.

AU - Triscos, P.

AU - Tristram, G.

AU - Villet, G.

AU - Volte, A.

AU - Wayne, M.

AU - Websdale, D. M.

AU - Wormser, G.

AU - Zolnierowski, Y.

PY - 1990/8/23

Y1 - 1990/8/23

N2 - In a photoproduction experiment using a mean photon energy of 100 GeV we have observed 29±8 Λc(Λc) charmed-baryon and antibaryon decays in the pK-π+ (pK+π-) final state. Quasi two-body final states do not contribite significantly to this channel. The mass of the Λc was measured to be 2281.7±2.7±2.6 MeV/c2 and its lifetime 0.18±0.03±0.03 ps. The ratio of Λc D production, measured in this experiment, is significantly greater than that predicted by photon-gluon fusion and using a Lund model to describe the hadronization. This excess cannot be completely accounted for in this model, even using a Λc branching fraction in pKπ as high as 5%. © 1990.

AB - In a photoproduction experiment using a mean photon energy of 100 GeV we have observed 29±8 Λc(Λc) charmed-baryon and antibaryon decays in the pK-π+ (pK+π-) final state. Quasi two-body final states do not contribite significantly to this channel. The mass of the Λc was measured to be 2281.7±2.7±2.6 MeV/c2 and its lifetime 0.18±0.03±0.03 ps. The ratio of Λc D production, measured in this experiment, is significantly greater than that predicted by photon-gluon fusion and using a Lund model to describe the hadronization. This excess cannot be completely accounted for in this model, even using a Λc branching fraction in pKπ as high as 5%. © 1990.

U2 - 10.1016/0370-2693(90)91342-9

DO - 10.1016/0370-2693(90)91342-9

M3 - Article

SN - 0370-2693

VL - 246

SP - 256

EP - 260

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Photoproduction of the Λc charmed baryon

Abstract

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