Search for new heavy quarks in e+e- collisions up to 46.78 GeV CM energy

H. J. Behrend; J. Büger; L. Criegee; H. Fenner; G. Franke; J. Meyer; V. Schröder; H. Sindt; U. Timm; G. G. Winter; W. Zimmermann; P. J. Bussey; A. Campbell; J. B. Dainton; D. Hendry; J. M. Scarr; I. O. Skillicorn; K. M. Smith; M. Poppe; H. Spitzer; O. Achterberg; G. D'Agostini; W. D. Apel; J. Engler; G. Flügge; B. Forstbauer; D. C. Fries; W. Fues; K. Gamerdinger; Th Henkes; G. Hopp; J. Knapp; M. Krüger; H. Küster; H. Müller; H. Randoll; K. H. Ranitzsch; G. Schmidt; H. Schneider; W. de Boer; G. Buschhorn; G. Grindhammer; P. Grosse-Wiesmann; B. Gunderson; C. Kiesling; R. Rotthaus; H. Lierl; D. Lüers; H. Oberlack; P. Schacht; G. Bonneaud; P. Colas; A. Cordier; M. Davier; D. Fournier; J. F. Grivaz; J. Haissinski; V. Journé; F. Le Diberder; U. Mallik; E. Ros; J. J. Veillet; J. H. Field; R. George; M. Goldberg; O. Hamon; F. Kapusta; F. Kovacs; R. Pain; L. Poggioli; M. Rivoal; M. Gaspero; B. Stella; R. Aleksan; J. Bouchez; G. Carnesecchi; G. Cozzika; Y. Ducros; A. Gaidot; P. Jarry; Y. Lavagne; F. Ould Saada; J. Pamela; J. P. Pansart; F. Pierre; G. Alexander; G. Bella; Y. Gnat; J. Grunhaus

doi:10.1016/0370-2693(84)91824-0

Search for new heavy quarks in e⁺e^- collisions up to 46.78 GeV CM energy

H. J. Behrend^*, J. Büger, L. Criegee, H. Fenner, G. Franke, J. Meyer, V. Schröder, H. Sindt, U. Timm, G. G. Winter, W. Zimmermann, P. J. Bussey, A. Campbell, J. B. Dainton, D. Hendry, J. M. Scarr, I. O. Skillicorn, K. M. Smith, M. Poppe, H. SpitzerO. Achterberg, G. D'Agostini, W. D. Apel, J. Engler, G. Flügge, B. Forstbauer, D. C. Fries, W. Fues, K. Gamerdinger, Th Henkes, G. Hopp, J. Knapp, M. Krüger, H. Küster, H. Müller, H. Randoll, K. H. Ranitzsch, G. Schmidt, H. Schneider, W. de Boer, G. Buschhorn, G. Grindhammer, P. Grosse-Wiesmann, B. Gunderson, C. Kiesling, R. Rotthaus, H. Lierl, D. Lüers, H. Oberlack, P. Schacht, G. Bonneaud, P. Colas, A. Cordier, M. Davier, D. Fournier, J. F. Grivaz, J. Haissinski, V. Journé, F. Le Diberder, U. Mallik, E. Ros, J. J. Veillet, J. H. Field, R. George, M. Goldberg, O. Hamon, F. Kapusta, F. Kovacs, R. Pain, L. Poggioli, M. Rivoal, M. Gaspero, B. Stella, R. Aleksan, J. Bouchez, G. Carnesecchi, G. Cozzika, Y. Ducros, A. Gaidot, P. Jarry, Y. Lavagne, F. Ould Saada, J. Pamela, J. P. Pansart, F. Pierre, G. Alexander, G. Bella, Y. Gnat, J. Grunhaus

^*Corresponding author for this work

School of Physics and Astronomy

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Abstract

The total e⁺e^- annihilation onto hadron has been measured at CM energies between 33.00 and 36.72 GeV and between 38.66 and 46.78 GeV in steps of 20 and 30 MeV respectively. The average of the ratio R=σ(e⁺e^-→hadrons)/ σ is 〈R〉=3.85±0.12 and 〈R〉=4.04±0.10 for the two energy ranges. The systematic error on 〈R〉 is 0.31. Both values are consistent with the expectation for the known coloured quarks u, d, s, c and b. No evidence was found for the production of new quarks. If the largest fluctuation in R is interpreted as a narrow resonance, it corresponds to a product of the electronic width and the hadronic branching ratio Γ_eeB_had>2.9 keV at the 95% confidence level, well below the value expected for the toponium vector ground state with charge 2 3e. The observed number of aplanar final states rules out the continuum production of a a new heavy flavour with pointlike cross section up to a CM energy of 45.4 GeV for a quarck charge of 1 3e. and up to 46.6 GeV for 2 3e at the 95% confidence level.

Original language	English
Pages (from-to)	297-301
Number of pages	5
Journal	Physics Letters B
Volume	144
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(84)91824-0
State	Published - 30 Aug 1984

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Behrend, H. J., Büger, J., Criegee, L., Fenner, H., Franke, G., Meyer, J., Schröder, V., Sindt, H., Timm, U., Winter, G. G., Zimmermann, W., Bussey, P. J., Campbell, A., Dainton, J. B., Hendry, D., Scarr, J. M., Skillicorn, I. O., Smith, K. M., Poppe, M., ... Grunhaus, J. (1984). Search for new heavy quarks in e⁺e^- collisions up to 46.78 GeV CM energy. Physics Letters B, 144(3-4), 297-301. https://doi.org/10.1016/0370-2693(84)91824-0

@article{ae25e5bee8864c14ae2348e6ad2b4d70,

title = "Search for new heavy quarks in e+e- collisions up to 46.78 GeV CM energy",

abstract = "The total e+e- annihilation onto hadron has been measured at CM energies between 33.00 and 36.72 GeV and between 38.66 and 46.78 GeV in steps of 20 and 30 MeV respectively. The average of the ratio R=σ(e+e-→hadrons)/ σ is 〈R〉=3.85±0.12 and 〈R〉=4.04±0.10 for the two energy ranges. The systematic error on 〈R〉 is 0.31. Both values are consistent with the expectation for the known coloured quarks u, d, s, c and b. No evidence was found for the production of new quarks. If the largest fluctuation in R is interpreted as a narrow resonance, it corresponds to a product of the electronic width and the hadronic branching ratio ΓeeBhad>2.9 keV at the 95% confidence level, well below the value expected for the toponium vector ground state with charge 2 3e. The observed number of aplanar final states rules out the continuum production of a a new heavy flavour with pointlike cross section up to a CM energy of 45.4 GeV for a quarck charge of 1 3e. and up to 46.6 GeV for 2 3e at the 95% confidence level.",

author = "Behrend, {H. J.} and J. B{\"u}ger and L. Criegee and H. Fenner and G. Franke and J. Meyer and V. Schr{\"o}der and H. Sindt and U. Timm and Winter, {G. G.} and W. Zimmermann and Bussey, {P. J.} and A. Campbell and Dainton, {J. B.} and D. Hendry and Scarr, {J. M.} and Skillicorn, {I. O.} and Smith, {K. M.} and M. Poppe and H. Spitzer and O. Achterberg and G. D'Agostini and Apel, {W. D.} and J. Engler and G. Fl{\"u}gge and B. Forstbauer and Fries, {D. C.} and W. Fues and K. Gamerdinger and Th Henkes and G. Hopp and J. Knapp and M. Kr{\"u}ger and H. K{\"u}ster and H. M{\"u}ller and H. Randoll and Ranitzsch, {K. H.} and G. Schmidt and H. Schneider and {de Boer}, W. and G. Buschhorn and G. Grindhammer and P. Grosse-Wiesmann and B. Gunderson and C. Kiesling and R. Rotthaus and H. Lierl and D. L{\"u}ers and H. Oberlack and P. Schacht and G. Bonneaud and P. Colas and A. Cordier and M. Davier and D. Fournier and Grivaz, {J. F.} and J. Haissinski and V. Journ{\'e} and {Le Diberder}, F. and U. Mallik and E. Ros and Veillet, {J. J.} and Field, {J. H.} and R. George and M. Goldberg and O. Hamon and F. Kapusta and F. Kovacs and R. Pain and L. Poggioli and M. Rivoal and M. Gaspero and B. Stella and R. Aleksan and J. Bouchez and G. Carnesecchi and G. Cozzika and Y. Ducros and A. Gaidot and P. Jarry and Y. Lavagne and {Ould Saada}, F. and J. Pamela and Pansart, {J. P.} and F. Pierre and G. Alexander and G. Bella and Y. Gnat and J. Grunhaus",

year = "1984",

month = aug,

day = "30",

doi = "10.1016/0370-2693(84)91824-0",

language = "אנגלית",

volume = "144",

pages = "297--301",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "3-4",

}

Behrend, HJ, Büger, J, Criegee, L, Fenner, H, Franke, G, Meyer, J, Schröder, V, Sindt, H, Timm, U, Winter, GG, Zimmermann, W, Bussey, PJ, Campbell, A, Dainton, JB, Hendry, D, Scarr, JM, Skillicorn, IO, Smith, KM, Poppe, M, Spitzer, H, Achterberg, O, D'Agostini, G, Apel, WD, Engler, J, Flügge, G, Forstbauer, B, Fries, DC, Fues, W, Gamerdinger, K, Henkes, T, Hopp, G, Knapp, J, Krüger, M, Küster, H, Müller, H, Randoll, H, Ranitzsch, KH, Schmidt, G, Schneider, H, de Boer, W, Buschhorn, G, Grindhammer, G, Grosse-Wiesmann, P, Gunderson, B, Kiesling, C, Rotthaus, R, Lierl, H, Lüers, D, Oberlack, H, Schacht, P, Bonneaud, G, Colas, P, Cordier, A, Davier, M, Fournier, D, Grivaz, JF, Haissinski, J, Journé, V, Le Diberder, F, Mallik, U, Ros, E, Veillet, JJ, Field, JH, George, R, Goldberg, M, Hamon, O, Kapusta, F, Kovacs, F, Pain, R, Poggioli, L, Rivoal, M, Gaspero, M, Stella, B, Aleksan, R, Bouchez, J, Carnesecchi, G, Cozzika, G, Ducros, Y, Gaidot, A, Jarry, P, Lavagne, Y, Ould Saada, F, Pamela, J, Pansart, JP, Pierre, F, Alexander, G , Bella, G, Gnat, Y & Grunhaus, J 1984, 'Search for new heavy quarks in e⁺e^- collisions up to 46.78 GeV CM energy', Physics Letters B, vol. 144, no. 3-4, pp. 297-301. https://doi.org/10.1016/0370-2693(84)91824-0

TY - JOUR

T1 - Search for new heavy quarks in e+e- collisions up to 46.78 GeV CM energy

AU - Behrend, H. J.

AU - Büger, J.

AU - Criegee, L.

AU - Fenner, H.

AU - Franke, G.

AU - Meyer, J.

AU - Schröder, V.

AU - Sindt, H.

AU - Timm, U.

AU - Winter, G. G.

AU - Zimmermann, W.

AU - Bussey, P. J.

AU - Campbell, A.

AU - Dainton, J. B.

AU - Hendry, D.

AU - Scarr, J. M.

AU - Skillicorn, I. O.

AU - Smith, K. M.

AU - Poppe, M.

AU - Spitzer, H.

AU - Achterberg, O.

AU - D'Agostini, G.

AU - Apel, W. D.

AU - Engler, J.

AU - Flügge, G.

AU - Forstbauer, B.

AU - Fries, D. C.

AU - Fues, W.

AU - Gamerdinger, K.

AU - Henkes, Th

AU - Hopp, G.

AU - Knapp, J.

AU - Krüger, M.

AU - Küster, H.

AU - Müller, H.

AU - Randoll, H.

AU - Ranitzsch, K. H.

AU - Schmidt, G.

AU - Schneider, H.

AU - de Boer, W.

AU - Buschhorn, G.

AU - Grindhammer, G.

AU - Grosse-Wiesmann, P.

AU - Gunderson, B.

AU - Kiesling, C.

AU - Rotthaus, R.

AU - Lierl, H.

AU - Lüers, D.

AU - Oberlack, H.

AU - Schacht, P.

AU - Bonneaud, G.

AU - Colas, P.

AU - Cordier, A.

AU - Davier, M.

AU - Fournier, D.

AU - Grivaz, J. F.

AU - Haissinski, J.

AU - Journé, V.

AU - Le Diberder, F.

AU - Mallik, U.

AU - Ros, E.

AU - Veillet, J. J.

AU - Field, J. H.

AU - George, R.

AU - Goldberg, M.

AU - Hamon, O.

AU - Kapusta, F.

AU - Kovacs, F.

AU - Pain, R.

AU - Poggioli, L.

AU - Rivoal, M.

AU - Gaspero, M.

AU - Stella, B.

AU - Aleksan, R.

AU - Bouchez, J.

AU - Carnesecchi, G.

AU - Cozzika, G.

AU - Ducros, Y.

AU - Gaidot, A.

AU - Jarry, P.

AU - Lavagne, Y.

AU - Ould Saada, F.

AU - Pamela, J.

AU - Pansart, J. P.

AU - Pierre, F.

AU - Alexander, G.

AU - Bella, G.

AU - Gnat, Y.

AU - Grunhaus, J.

PY - 1984/8/30

Y1 - 1984/8/30

N2 - The total e+e- annihilation onto hadron has been measured at CM energies between 33.00 and 36.72 GeV and between 38.66 and 46.78 GeV in steps of 20 and 30 MeV respectively. The average of the ratio R=σ(e+e-→hadrons)/ σ is 〈R〉=3.85±0.12 and 〈R〉=4.04±0.10 for the two energy ranges. The systematic error on 〈R〉 is 0.31. Both values are consistent with the expectation for the known coloured quarks u, d, s, c and b. No evidence was found for the production of new quarks. If the largest fluctuation in R is interpreted as a narrow resonance, it corresponds to a product of the electronic width and the hadronic branching ratio ΓeeBhad>2.9 keV at the 95% confidence level, well below the value expected for the toponium vector ground state with charge 2 3e. The observed number of aplanar final states rules out the continuum production of a a new heavy flavour with pointlike cross section up to a CM energy of 45.4 GeV for a quarck charge of 1 3e. and up to 46.6 GeV for 2 3e at the 95% confidence level.

AB - The total e+e- annihilation onto hadron has been measured at CM energies between 33.00 and 36.72 GeV and between 38.66 and 46.78 GeV in steps of 20 and 30 MeV respectively. The average of the ratio R=σ(e+e-→hadrons)/ σ is 〈R〉=3.85±0.12 and 〈R〉=4.04±0.10 for the two energy ranges. The systematic error on 〈R〉 is 0.31. Both values are consistent with the expectation for the known coloured quarks u, d, s, c and b. No evidence was found for the production of new quarks. If the largest fluctuation in R is interpreted as a narrow resonance, it corresponds to a product of the electronic width and the hadronic branching ratio ΓeeBhad>2.9 keV at the 95% confidence level, well below the value expected for the toponium vector ground state with charge 2 3e. The observed number of aplanar final states rules out the continuum production of a a new heavy flavour with pointlike cross section up to a CM energy of 45.4 GeV for a quarck charge of 1 3e. and up to 46.6 GeV for 2 3e at the 95% confidence level.

UR - http://www.scopus.com/inward/record.url?scp=0013450605&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(84)91824-0

DO - 10.1016/0370-2693(84)91824-0

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:0013450605

SN - 0370-2693

VL - 144

SP - 297

EP - 301

JO - Physics Letters B

JF - Physics Letters B

IS - 3-4

ER -

Search for new heavy quarks in e⁺e^- collisions up to 46.78 GeV CM energy

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