Search for a new weakly interacting particle

D. Decamp; B. Deschizeaux; C. Goy; J. P. Lees; M. N. Minard; R. Alemany; J. M. Crespo; M. Delfino; E. Fernandez; V. Gaitan; Ll Garrido; P. Mato; Mir Ll.M.; A. Pacheco; M. G. Catanesi; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Ruan; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; W. B. Atwood; F. Bird; E. Blucher; G. Bonvicini; F. Bossi; D. Brown; T. H. Burnett; H. Drevermann; F. Dydak; R. W. Forty; C. Grab; R. Hagelberg; S. Haywood; J. Hilgart; B. Jost; M. Kasemann; J. Knobloch; A. Lacourt; E. Lançon; I. Lehraus; T. Lohse; A. Marchioro; M. Martinez; S. Menary; A. Minten; A. Miotto; R. Miguel; H. G. Moser; J. Nash; P. Palazzi; F. Ranjard; G. Redlinger; A. Roth; J. Rothberg; H. Rotscheidt; R. St. Denis; D. Schlatter; M. Takashima; M. Talby; W. Tejessy; H. Wachsmuth; S. Wasserbaech; S. Wheeler; W. Wiedenmann; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Falvard; R. El Fellous; P. Gay; J. Harvey; P. Henrard; J. Jousset

doi:10.1016/0370-2693(91)90657-C

Search for a new weakly interacting particle

D. Decamp, B. Deschizeaux, C. Goy, J. P. Lees, M. N. Minard, R. Alemany, J. M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll Garrido, P. Mato, Mir Ll.M., A. Pacheco, M. G. Catanesi, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. MaggiM. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Ruan, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, W. B. Atwood, F. Bird, E. Blucher, G. Bonvicini, F. Bossi, D. Brown, T. H. Burnett, H. Drevermann, F. Dydak, R. W. Forty, C. Grab, R. Hagelberg, S. Haywood, J. Hilgart, B. Jost, M. Kasemann, J. Knobloch, A. Lacourt, E. Lançon, I. Lehraus, T. Lohse, A. Marchioro, M. Martinez, S. Menary, A. Minten, A. Miotto, R. Miguel, H. G. Moser, J. Nash, P. Palazzi, F. Ranjard, G. Redlinger, A. Roth, J. Rothberg, H. Rotscheidt, R. St. Denis, D. Schlatter, M. Takashima, M. Talby, W. Tejessy, H. Wachsmuth, S. Wasserbaech, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, R. El Fellous, P. Gay, J. Harvey, P. Henrard, J. Jousset

Department of Physics

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Abstract

A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2. © 1991.

Original language	English
Pages (from-to)	139-147
Journal	Physics Letters B
Volume	262
Issue number	1
DOIs	https://doi.org/10.1016/0370-2693(91)90657-C
Publication status	Published - 13 Jun 1991

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10.1016/0370-2693(91)90657-C

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Decamp, D., Deschizeaux, B., Goy, C., Lees, J. P., Minard, M. N., Alemany, R., Crespo, J. M., Delfino, M., Fernandez, E., Gaitan, V., Garrido, L., Mato, P., Ll.M., M., Pacheco, A., Catanesi, M. G., Creanza, D., de Palma, M., Farilla, A., Iaselli, G., ... Jousset, J. (1991). Search for a new weakly interacting particle. Physics Letters B, 262(1), 139-147. https://doi.org/10.1016/0370-2693(91)90657-C

@article{7cfb49c2521b411c909c2c9189a6c422,

title = "Search for a new weakly interacting particle",

abstract = "A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2. {\textcopyright} 1991.",

author = "D. Decamp and B. Deschizeaux and C. Goy and Lees, {J. P.} and Minard, {M. N.} and R. Alemany and Crespo, {J. M.} and M. Delfino and E. Fernandez and V. Gaitan and Ll Garrido and P. Mato and Mir Ll.M. and A. Pacheco and Catanesi, {M. G.} and D. Creanza and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi and M. Maggi and S. Natali and S. Nuzzo and M. Quattromini and A. Ranieri and G. Raso and F. Romano and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and G. Zito and Y. Gao and H. Hu and D. Huang and X. Huang and J. Lin and J. Lou and C. Qiao and T. Ruan and T. Wang and Y. Xie and D. Xu and R. Xu and J. Zhang and W. Zhao and Atwood, {W. B.} and F. Bird and E. Blucher and G. Bonvicini and F. Bossi and D. Brown and Burnett, {T. H.} and H. Drevermann and F. Dydak and Forty, {R. W.} and C. Grab and R. Hagelberg and S. Haywood and J. Hilgart and B. Jost and M. Kasemann and J. Knobloch and A. Lacourt and E. Lan{\c c}on and I. Lehraus and T. Lohse and A. Marchioro and M. Martinez and S. Menary and A. Minten and A. Miotto and R. Miguel and Moser, {H. G.} and J. Nash and P. Palazzi and F. Ranjard and G. Redlinger and A. Roth and J. Rothberg and H. Rotscheidt and {St. Denis}, R. and D. Schlatter and M. Takashima and M. Talby and W. Tejessy and H. Wachsmuth and S. Wasserbaech and S. Wheeler and W. Wiedenmann and W. Witzeling and J. Wotschack and Z. Ajaltouni and M. Bardadin-Otwinowska and A. Falvard and {El Fellous}, R. and P. Gay and J. Harvey and P. Henrard and J. Jousset",

year = "1991",

month = jun,

day = "13",

doi = "10.1016/0370-2693(91)90657-C",

language = "English",

volume = "262",

pages = "139--147",

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

issn = "0370-2693",

number = "1",

}

Decamp, D, Deschizeaux, B, Goy, C, Lees, JP, Minard, MN, Alemany, R, Crespo, JM , Delfino, M , Fernandez, E, Gaitan, V, Garrido, L, Mato, P, Ll.M., M, Pacheco, A, Catanesi, MG, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Maggi, M, Natali, S, Nuzzo, S, Quattromini, M, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Gao, Y, Hu, H, Huang, D, Huang, X, Lin, J, Lou, J, Qiao, C, Ruan, T, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Atwood, WB, Bird, F, Blucher, E, Bonvicini, G, Bossi, F, Brown, D, Burnett, TH, Drevermann, H, Dydak, F, Forty, RW, Grab, C, Hagelberg, R, Haywood, S, Hilgart, J, Jost, B, Kasemann, M, Knobloch, J, Lacourt, A, Lançon, E, Lehraus, I, Lohse, T, Marchioro, A, Martinez, M, Menary, S, Minten, A, Miotto, A, Miguel, R, Moser, HG, Nash, J, Palazzi, P, Ranjard, F, Redlinger, G, Roth, A, Rothberg, J, Rotscheidt, H, St. Denis, R, Schlatter, D, Takashima, M, Talby, M, Tejessy, W, Wachsmuth, H, Wasserbaech, S, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, Falvard, A, El Fellous, R, Gay, P, Harvey, J, Henrard, P & Jousset, J 1991, 'Search for a new weakly interacting particle', Physics Letters B, vol. 262, no. 1, pp. 139-147. https://doi.org/10.1016/0370-2693(91)90657-C

TY - JOUR

T1 - Search for a new weakly interacting particle

AU - Decamp, D.

AU - Deschizeaux, B.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Alemany, R.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Mato, P.

AU - Ll.M., Mir

AU - Pacheco, A.

AU - Catanesi, M. G.

AU - Creanza, D.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

AU - Maggi, M.

AU - Natali, S.

AU - Nuzzo, S.

AU - Quattromini, M.

AU - Ranieri, A.

AU - Raso, G.

AU - Romano, F.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Zito, G.

AU - Gao, Y.

AU - Hu, H.

AU - Huang, D.

AU - Huang, X.

AU - Lin, J.

AU - Lou, J.

AU - Qiao, C.

AU - Ruan, T.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhao, W.

AU - Atwood, W. B.

AU - Bird, F.

AU - Blucher, E.

AU - Bonvicini, G.

AU - Bossi, F.

AU - Brown, D.

AU - Burnett, T. H.

AU - Drevermann, H.

AU - Dydak, F.

AU - Forty, R. W.

AU - Grab, C.

AU - Hagelberg, R.

AU - Haywood, S.

AU - Hilgart, J.

AU - Jost, B.

AU - Kasemann, M.

AU - Knobloch, J.

AU - Lacourt, A.

AU - Lançon, E.

AU - Lehraus, I.

AU - Lohse, T.

AU - Marchioro, A.

AU - Martinez, M.

AU - Menary, S.

AU - Minten, A.

AU - Miotto, A.

AU - Miguel, R.

AU - Moser, H. G.

AU - Nash, J.

AU - Palazzi, P.

AU - Ranjard, F.

AU - Redlinger, G.

AU - Roth, A.

AU - Rothberg, J.

AU - Rotscheidt, H.

AU - St. Denis, R.

AU - Schlatter, D.

AU - Takashima, M.

AU - Talby, M.

AU - Tejessy, W.

AU - Wachsmuth, H.

AU - Wasserbaech, S.

AU - Wheeler, S.

AU - Wiedenmann, W.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Bardadin-Otwinowska, M.

AU - Falvard, A.

AU - El Fellous, R.

AU - Gay, P.

AU - Harvey, J.

AU - Henrard, P.

AU - Jousset, J.

PY - 1991/6/13

Y1 - 1991/6/13

N2 - A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2. © 1991.

AB - A search for events of the type e+e-→ℓ+ℓ-X 0, where X0 can be any weakly interacting particle which couples to the Z, has been performed with the ALEPH detector at LEP, by searching for acollinear lepton pairs. Such particles can be excluded up to a mass of 7.0 GeV/c2 for a value of the ratio of branching fractions, Br(Z→X0l+l-)/Br(Z→l+ l-), greater than 2.5 × 10-3 if the X0 has third component of isospin, I3 greater than 1 2 and decays to a pair of virtual gauge bosons. When this analysis is combined with the previous results of the Higgs particle searches from ALEPH, this limit can be extended to an X0 mass of 60 GeV/c2. © 1991.

U2 - 10.1016/0370-2693(91)90657-C

DO - 10.1016/0370-2693(91)90657-C

M3 - Article

SN - 0370-2693

VL - 262

SP - 139

EP - 147

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Search for a new weakly interacting particle

Abstract

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