Search for unstable heavy and excited leptons in e+e− collisions at ∝s = 170-172 GeV

Ackerstaff, K.; Alexander, G.; Allison, J.; Altekamp, N.; Anderson, K. vJ.; Anderson, S.; Arcellie, S.; Asai, S.; Axen, D.; Azuelos, G.; Ball, A. H.; Barberio, E.; Barlow, R. J.; Bartoldus, R.; Batley, J. R.; Baumann, S.; Bechtluft, J.; Beeston, C.; Behnke, T.; Bell, A. N.; Bell, K. W.; Bella, G.; Bentvelsen, S.; Bethke, S.; Biebel, O.; Biguzzi, A.; Bird, S. D.; Blobel, V.; Bloodworth, I. J.; Bloomer, J. E.; Bobinski, M.; Bock, P.; Bonacorsi, D.; Boutemeur, M.; Bouwens, B. T.; Braibant, S.; Brigliadori, L.; Brown, R. M.; Burckhart, H. J.; Burgard, C.; Bürgin, R.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Chrisman, D.; Clarke, P. E. L.; Cohen, I.; Conboy, J. E.; Cooke, O. C.; Cuffiani, M.; Dado, S.; Dallapiccola, C.; Dallavalle, G. M.; Davis, R.; De Jong, S.; del Pozo, L. A.; Desch, K.; Dienes, B.; Dixit, M. S.; do Couto e Silva, E.; Doucet, M.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Eatough, D.; Edwards, J. E. G.; Estabrooks, P. G.; Evans, H. G.; Evans, M.; Fabbri, F.; Fanti, M.; Faust, A. A.; Fiedler, F.; Fierro, M.; Fischer, H. M.; Fleck, I.; Folman, R.; Fong, D. G.; Foucher, M.; Fürtjes, A.; Futyan, D. I.; Gagnon, P.; Gary, J. W.; Gascon, J.; Gascon-Shotkin, S. M.; Geddes, N. I.; Geich-Gimbe, C.; Geralis, T.; Giacomelli, G.; Giacomelli, P.; Giacomelli, R.; Gibson, V.; Gibson, W. R.; Gingrich, D. M.; Glenzinski, D.; Goldberg, J.; Goodrick, M. J.; Gorn, W.; Grandi, C.; Gross, E.; Grunhaus, J.; Gruwé, M.; Hajdu, C.; Hanson, G. G.; Hansroul, M.; Hapke, M.; Hargrove, C. K.; Hart, P. A.; Hartmann, C.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Hemingway, R. J.; Herndon, M.; Herten, G.; Heuer, R. D.; Hildreth, M. D.; Hill, J. C.; Hillier, S. J.; Hobson, P. R.; Homer, R. J.; Honma, A. K.; Horvdth, D.; Hossain, K. R.; Howard, R.; Hüntemeyer, P.; Hutchcroft, D. E.; Igo-Kemenes, P.; Imrie, D. C.; Ingram, M. R.; Ishii, K.; Jawahery, A.; Jeffreys, P. W.; Jeremie, H.; Jimack, M.; Joly, A.; Jones, C. R.; Jones, G.; Jones, M.; Jost, U.; Jovanovic, P.; Junk, T. R.; Karlen, D.; Kartvelishvili, V.; Kawagoe, K.; Kawamoto, T.; Kayal, P. I.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; Kirk, J.; Klier, A.; Kluth, S.; Kobayashi, T.; Kobel, M.; Koetke, D. S.; Kokott, T. P.; Kolrep, M.; Komamiya, S.; Kress, T.; Krieger, P.; von Krogh, J.; Kyberd, P.; Lafferty, G. D.; Lahmann, R.; Lai, W. P.; Lanske, D.; Lauber, J.; Lautenschlager, S. R.; Layter, J. G.; Lazic, D.; Lee, A. M.; Lefebvre, E.; Lellouch, D.; Letts, J.; Levinson, L.; Lloyd, S. L.; Loebinger, F. K.; Loug, G. D.; Losty, M. J.; Ludwig, J.; Macchiolo, A.; Macpherson, A.; Mannelli, M.; Marcellini, S.; Markus, C.; Martin, A. J.; Martin, J. P.; Martinez, G.; Mashimo, T.; Mättig, P.; McDonald, W. J.; McKenna, J.; Mckigney, E. A.; McMahon, T. J.; McPherson, R. A.; Meijers, F.; Menke, S.; Merritt, F. S.; Mes, H.; Meyer, J.; Michelini, A.; Mikenberg, G.; Miller, D. J.; Mincer, A.; Mir, R.; Mohr, W.; Montanari, A.; Mori, T.; Morii, M.; Müller, U.; Mihara, S.; Nagai, K.; Nakamura, I.; Neal, H. A.; Nellen, B.; Nisius, R.; O'Neale, S. W.; Oakham, F. G.; Odorici, F.; Ogren, H. O.; Oh, A.; Oldershaw, N. J.; Oreglia, M. J.; Orito, S.; Pálinkás, J.; Pásztor, G.; Pater, J. R.; Patrick, G. N.; Patt, J.; Pearce, M. J.; Perez-Ochoa, R.; Petzold, S.; Pfeifenschneider, P.; Pilcher, J. E.; Pinfold, J.; Plane, D. E.; Poffenberger, P.; Poli, B.; Posthaus, A.; Rees, D. L.; Rigby, D.; Robertson, S.; Robins, S. A.; Rodning, N.; Roney, J. M.; Rooke, A.; Ros, E.; Rossi, A. M.; Routenburg, P.; Rozen, Y.; Runge, K.; Runolfsson, O.; Ruppel, U.; Rust, D. R.; Rylko, R.; Sachs, K.; Saeki, T.; Sarkisyan, E. K. G.; Sbarra, C.; Schaile, A. D.; Schaile, O.; Scharf, F.; Scharf-Hansen, P.; Schenk, P.; Schieck, J.; Schleper, P.; Schmitt, B.; Schmitt, S.; Schöning, A.; Schröder, M.; Schultz-Coulon, H. C.; Schumacher, M.; Schwick, C.; Scott, W. G.; Shears, T. G.; Shen, B. C.; Shepherd-Themistocleous, C. H.; Sherwood, P.; Siroli, G. P.; Sittler, A.; Skillman, A.; Skuja, A.; Smith, A. M.; Snow, G. A.; Sobie, R.; Söldner-Rembold, S.; Springer, R. W.; Sproston, M.; Stephens, K.; Steuerer, J.; Stockhausen, B.; Stoll, K.; Strom, D.; Szymanski, Strom; Tafirout, R.; Talbot, S. D.; Tanaka, S.; Taras, P.; Tarem, S.; Teuscher, R.; Thiergen, M.; Thomson, M. A.; von Törne, E.; Towers, S.; Trigger, I.; Trócsányi, Z.; Tsur, E.; Turcot, A. S.; Turner-Watson, M. F.; Utzat, P.; Van Kooten, R.; Verzocchi, M.; Vikas, P.; Vokurka, E. H.; Voss, H.; Wäckerle, F.; Wagner, A.; Ward, C. P.; Wards, D. R.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Wells, P. S.; Wermes, N.; White, J. S.; Wilkens, B.; Wilson, G. W.; Wilson, J. A.; Wolf, G.; Wyatt, T. R.; Yamashita, S.; Yekutieli, G.; Zacek, V.; Zer-Zion, D.

doi:10.1007/BF01245797

Search for unstable heavy and excited leptons in e⁺e⁻ collisions at ∝s = 170-172 GeV

Published: 27 February 2005

Volume 1, pages 45–64, (1998)
Cite this article

The European Physical Journal C Aims and scope Submit manuscript

OPAL Collaboration,
K. Ackerstaff⁸,
G. Alexander²²,
J. Allison¹⁶,
N. Altekamp⁵,
K. vJ. Anderson⁹,
S. Anderson¹²,
S. Arcellie²,
S. Asai^23,24,
D. Axen²⁹,
G. Azuelos¹⁸,
A. H. Ball¹⁷,
E. Barberio⁸,
R. J. Barlow¹⁶,
R. Bartoldus³,
J. R. Batley⁵,
S. Baumann³,
J. Bechtluft¹⁴,
C. Beeston¹⁶,
T. Behnke⁸,
A. N. Bell¹,
K. W. Bell²⁰,
G. Bella²²,
S. Bentvelsen⁸,
S. Bethke¹⁴,
O. Biebel¹⁴,
A. Biguzzi⁵,
S. D. Bird¹⁶,
V. Blobel²⁷,
I. J. Bloodworth¹,
J. E. Bloomer¹,
M. Bobinski¹⁰,
P. Bock¹¹,
D. Bonacorsi²,
M. Boutemeur³⁴,
B. T. Bouwens¹²,
S. Braibant²,
L. Brigliadori²,
R. M. Brown²⁰,
H. J. Burckhart⁸,
C. Burgard⁸,
R. Bürgin¹⁰,
P. Capiluppi²,
R. K. Carnegie⁶,
A. A. Carter¹³,
J. R. Carter⁵,
C. Y. Chang¹⁷,
D. G. Charlton¹,
D. Chrisman⁴,
P. E. L. Clarke¹⁵,
I. Cohen²²,
J. E. Conboy¹⁵,
O. C. Cooke⁸,
M. Cuffiani²,
S. Dado²¹,
C. Dallapiccola¹⁷,
G. M. Dallavalle²,
R. Davis³⁰,
S. De Jong¹²,
L. A. del Pozo⁴,
K. Desch³,
B. Dienes³³,
M. S. Dixit⁷,
E. do Couto e Silva¹²,
M. Doucet¹⁸,
E. Duchovni²⁶,
G. Duckeck³⁴,
I. P. Duerdoth¹⁶,
D. Eatough¹⁶,
J. E. G. Edwards¹⁶,
P. G. Estabrooks⁶,
H. G. Evans⁹,
M. Evans¹³,
F. Fabbri²,
M. Fanti²,
A. A. Faust³⁰,
F. Fiedler²⁷,
M. Fierro²,
H. M. Fischer³,
I. Fleck⁸,
R. Folman²⁶,
D. G. Fong¹⁷,
M. Foucher¹⁷,
A. Fürtjes⁸,
D. I. Futyan¹⁶,
P. Gagnon⁷,
J. W. Gary⁴,
J. Gascon¹⁸,
S. M. Gascon-Shotkin¹⁷,
N. I. Geddes²⁰,
C. Geich-Gimbe¹³,
T. Geralis²⁰,
G. Giacomelli²,
P. Giacomelli⁴,
R. Giacomelli²,
V. Gibson⁵,
W. R. Gibson¹³,
D. M. Gingrich³⁰,
D. Glenzinski⁹,
J. Goldberg²¹,
M. J. Goodrick⁵,
W. Gorn⁴,
C. Grandi²,
E. Gross²⁶,
J. Grunhaus²²,
M. Gruwé⁸,
C. Hajdu³²,
G. G. Hanson¹²,
M. Hansroul⁸,
M. Hapke¹³,
C. K. Hargrove⁷,
P. A. Hart⁹,
C. Hartmann³,
M. Hauschild⁸,
C. M. Hawkes⁵,
R. Hawkings²⁷,
R. J. Hemingway⁶,
M. Herndon¹⁷,
G. Herten¹⁰,
R. D. Heuer⁸,
M. D. Hildreth⁸,
J. C. Hill⁵,
S. J. Hillier¹,
P. R. Hobson²⁵,
R. J. Homer¹,
A. K. Honma²⁸,
D. Horvdth³²,
K. R. Hossain³⁰,
R. Howard²⁹,
P. Hüntemeyer²⁷,
D. E. Hutchcroft⁵,
P. Igo-Kemenes¹¹,
D. C. Imrie²⁵,
M. R. Ingram¹⁶,
K. Ishii^23,24,
A. Jawahery¹⁷,
P. W. Jeffreys²⁰,
H. Jeremie¹⁸,
M. Jimack¹,
A. Joly¹⁸,
C. R. Jones⁵,
G. Jones¹⁶,
M. Jones⁶,
U. Jost¹¹,
P. Jovanovic¹,
T. R. Junk⁸,
D. Karlen⁶,
V. Kartvelishvili¹⁶,
K. Kawagoe^23,24,
T. Kawamoto^23,24,
P. I. Kayal³⁰,
R. K. Keeler²⁸,
R. G. Kellogg¹⁷,
B. W. Kennedy²⁰,
J. Kirk²⁹,
A. Klier²⁶,
S. Kluth⁸,
T. Kobayashi^23,24,
M. Kobel¹⁰,
D. S. Koetke⁶,
T. P. Kokott³,
M. Kolrep¹⁰,
S. Komamiya^23,24,
T. Kress¹¹,
P. Krieger⁶,
J. von Krogh¹¹,
P. Kyberd¹³,
G. D. Lafferty¹⁶,
R. Lahmann¹⁷,
W. P. Lai¹⁹,
D. Lanske¹⁴,
J. Lauber¹⁵,
S. R. Lautenschlager³¹,
J. G. Layter⁴,
D. Lazic²¹,
A. M. Lee³¹,
E. Lefebvre¹⁸,
D. Lellouch,
J. Letts¹²,
L. Levinson²⁶,
S. L. Lloyd¹³,
F. K. Loebinger¹⁶,
G. D. Loug²⁸,
M. J. Losty⁷,
J. Ludwig¹⁰,
A. Macchiolo²,
A. Macpherson³⁰,
M. Mannelli⁸,
S. Marcellini²,
C. Markus³,
A. J. Martin¹³,
J. P. Martin¹⁸,
G. Martinez¹⁷,
T. Mashimo^23,24,
P. Mättig³,
W. J. McDonald³⁰,
J. McKenna,
E. A. Mckigney¹⁵,
T. J. McMahon¹,
R. A. McPherson⁸,
F. Meijers⁸,
S. Menke³,
F. S. Merritt⁹,
H. Mes⁷,
J. Meyer²⁷,
A. Michelini²,
G. Mikenberg²⁶,
D. J. Miller¹⁵,
A. Mincer²¹,
R. Mir²⁶,
W. Mohr¹⁰,
A. Montanari²,
T. Mori^23,24,
M. Morii^23,24,
U. Müller³,
S. Mihara^23,24,
K. Nagai²⁶,
I. Nakamura^23,24,
H. A. Neal⁸,
B. Nellen³,
R. Nisius⁸,
S. W. O'Neale¹,
F. G. Oakham⁷,
F. Odorici²,
H. O. Ogren¹²,
A. Oh²⁷,
N. J. Oldershaw¹⁶,
M. J. Oreglia⁹,
S. Orito^23,24,
J. Pálinkás³³,
G. Pásztor³²,
J. R. Pater¹⁶,
G. N. Patrick²⁰,
J. Patt¹⁰,
M. J. Pearce¹,
R. Perez-Ochoa⁸,
S. Petzold²⁷,
P. Pfeifenschneider¹⁴,
J. E. Pilcher⁹,
J. Pinfold³⁰,
D. E. Plane⁸,
P. Poffenberger²⁸,
B. Poli²,
A. Posthaus³,
D. L. Rees¹,
D. Rigby¹,
S. Robertson²⁸,
S. A. Robins²¹,
N. Rodning³⁰,
J. M. Roney²⁸,
A. Rooke¹⁵,
E. Ros⁸,
A. M. Rossi²,
P. Routenburg³⁰,
Y. Rozen²¹,
K. Runge¹⁰,
O. Runolfsson⁸,
U. Ruppel¹⁴,
D. R. Rust¹²,
R. Rylko²⁵,
K. Sachs¹⁰,
T. Saeki^23,24,
E. K. G. Sarkisyan²²,
C. Sbarra²⁹,
A. D. Schaile³⁴,
O. Schaile³⁴,
F. Scharf³,
P. Scharf-Hansen⁸,
P. Schenk³⁴,
J. Schieck¹¹,
P. Schleper¹¹,
B. Schmitt⁸,
S. Schmitt¹¹,
A. Schöning⁸,
M. Schröder⁸,
H. C. Schultz-Coulon¹⁰,
M. Schumacher³,
C. Schwick⁸,
W. G. Scott²⁰,
T. G. Shears¹⁶,
B. C. Shen⁴,
C. H. Shepherd-Themistocleous⁸,
P. Sherwood¹⁵,
G. P. Siroli²,
A. Sittler²⁷,
A. Skillman¹⁵,
A. Skuja¹⁷,
A. M. Smith⁸,
G. A. Snow¹⁷,
R. Sobie²⁸,
S. Söldner-Rembold¹⁰,
R. W. Springer³⁰,
M. Sproston²⁰,
K. Stephens¹⁶,
J. Steuerer²⁷,
B. Stockhausen³,
K. Stoll¹⁰,
D. Strom¹⁹,
Strom Szymanski²⁰,
R. Tafirout¹⁸,
S. D. Talbot¹,
S. Tanaka^23,24,
P. Taras¹⁸,
S. Tarem²¹,
R. Teuscher⁸,
M. Thiergen¹⁰,
M. A. Thomson⁸,
E. von Törne³,
S. Towers⁶,
I. Trigger¹⁸,
Z. Trócsányi³³,
E. Tsur²²,
A. S. Turcot⁹,
M. F. Turner-Watson⁸,
P. Utzat¹¹,
R. Van Kooten¹²,
M. Verzocchi¹⁰,
P. Vikas¹⁸,
E. H. Vokurka¹⁶,
H. Voss³,
F. Wäckerle¹⁰,
A. Wagner²⁷,
C. P. Ward⁵,
D. R. Wards⁵,
P. M. Watkins¹,
A. T. Watson¹,
N. K. Watson¹,
P. S. Wells⁸,
N. Wermes³,
J. S. White²⁸,
B. Wilkens¹⁰,
G. W. Wilson²⁷,
J. A. Wilson¹,
G. Wolf⁶,
T. R. Wyatt¹⁶,
S. Yamashita^23,24,
G. Yekutieli²⁶,
V. Zacek¹⁸ &
…
D. Zer-Zion⁸

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Abstract

We have searched for unstable neutral and charged heavy leptons, N and L^±, and for excited states of neutral and charged leptons, ν^* e^*, μ^* and τ^*, in e⁺e⁻ collisions at centre-of-mass energies of 170 and 172 GeV using the OPAL detector at LEP. No evidence for their existence was found. From the analysis of charged-current decays of pair-produced unstable heavy leptons, and of charged-current and photonic decays of pair-produced excited leptons, lower limits on their masses are derived. From the analysis of charged-current and photonic decays of singly-produced excited leptons, upper limits on the ratio of the coupling to the compositeness scale, ϕ/λ, are determined for masses up to the kinematic limit.

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School of Physics and Space Research, University of Birmingham, B15 2TT, Birmingham, UK
A. N. Bell, I. J. Bloodworth, J. E. Bloomer, D. G. Charlton, S. J. Hillier, R. J. Homer, M. Jimack, P. Jovanovic, T. J. McMahon, S. W. O'Neale, M. J. Pearce, D. L. Rees, D. Rigby, S. D. Talbot, P. M. Watkins, A. T. Watson, N. K. Watson & J. A. Wilson
Dipartimento di Fisica dell' Università di Bologna and INFN, I-40126, Bologna, Italy
S. Arcellie, D. Bonacorsi, S. Braibant, L. Brigliadori, P. Capiluppi, M. Cuffiani, G. M. Dallavalle, F. Fabbri, M. Fanti, M. Fierro, G. Giacomelli, R. Giacomelli, C. Grandi, A. Macchiolo, S. Marcellini, A. Michelini, A. Montanari, F. Odorici, B. Poli, A. M. Rossi & G. P. Siroli
Physikalisches Institut, Universitdt Bonn, D-53115, Bonn, Germany
R. Bartoldus, S. Baumann, K. Desch, H. M. Fischer, C. Hartmann, T. P. Kokott, C. Markus, P. Mättig, S. Menke, U. Müller, B. Nellen, A. Posthaus, F. Scharf, M. Schumacher, B. Stockhausen, E. von Törne, H. Voss & N. Wermes
Department of Physics, University of California, 92521, Riverside, CA, USA
D. Chrisman, L. A. del Pozo, J. W. Gary, P. Giacomelli, W. Gorn, J. G. Layter & B. C. Shen
Cavendish Laboratory, CB3 0HE, Cambridge, UK
N. Altekamp, J. R. Batley, A. Biguzzi, J. R. Carter, V. Gibson, M. J. Goodrick, C. M. Hawkes, J. C. Hill, D. E. Hutchcroft, C. R. Jones, C. P. Ward & D. R. Wards
Ottawa-Carleton Institute for Physics, Department of Physics, Carleton University, KIS 5136, Ottawa, Ontario, Canada
R. K. Carnegie, P. G. Estabrooks, R. J. Hemingway, M. Jones, D. Karlen, D. S. Koetke, P. Krieger, S. Towers & G. Wolf
Centre for Research in Particle Physics, Carleton University, KlS 5136, Ottawa, Ontario, Canada
M. S. Dixit, P. Gagnon, C. K. Hargrove, M. J. Losty, H. Mes & F. G. Oakham
CERN, European Organisation for Particle Physics, CH-1211, Geneva 23, Switzerland
K. Ackerstaff, E. Barberio, T. Behnke, S. Bentvelsen, H. J. Burckhart, C. Burgard, O. C. Cooke, I. Fleck, A. Fürtjes, M. Gruwé, M. Hansroul, M. Hauschild, R. D. Heuer, M. D. Hildreth, T. R. Junk, S. Kluth, M. Mannelli, R. A. McPherson, F. Meijers, H. A. Neal, R. Nisius, R. Perez-Ochoa, D. E. Plane, E. Ros, O. Runolfsson, P. Scharf-Hansen, B. Schmitt, A. Schöning, M. Schröder, C. Schwick, C. H. Shepherd-Themistocleous, A. M. Smith, R. Teuscher, M. A. Thomson, M. F. Turner-Watson, P. S. Wells & D. Zer-Zion
Enrico Fermi Institute and Department of Physics, University of Chicago, 60637, Chicago, IL, USA
K. vJ. Anderson, H. G. Evans, D. Glenzinski, P. A. Hart, F. S. Merritt, M. J. Oreglia, J. E. Pilcher & A. S. Turcot
Fakultät für Physik, Albert Ludwigs Universität, D-79104, Freiburg, Germany
M. Bobinski, R. Bürgin, G. Herten, M. Kobel, M. Kolrep, J. Ludwig, W. Mohr, J. Patt, K. Runge, K. Sachs, H. C. Schultz-Coulon, S. Söldner-Rembold, K. Stoll, M. Thiergen, M. Verzocchi, F. Wäckerle & B. Wilkens
Physikalisches Institut, Universität Heidelberg, D-69120, Heidelberg, Germany
P. Bock, P. Igo-Kemenes, U. Jost, T. Kress, J. von Krogh, J. Schieck, P. Schleper, S. Schmitt & P. Utzat
Department of Physics, Indiana University, Swain Hall West 117, 47405, Bloomington, IN, USA
S. Anderson, B. T. Bouwens, S. De Jong, E. do Couto e Silva, G. G. Hanson, J. Letts, H. O. Ogren, D. R. Rust & R. Van Kooten
Queen Mary and Westfield College, University of London, El 4NS, London, UK
A. A. Carter, M. Evans, C. Geich-Gimbe, W. R. Gibson, M. Hapke, P. Kyberd, S. L. Lloyd & A. J. Martin
III Physikalisches Institut, Technische Hochschule Aachen, Sommerfeldstrasse 26-28, D-52056, Aachen, Germany
J. Bechtluft, S. Bethke, O. Biebel, D. Lanske, P. Pfeifenschneider & U. Ruppel
University College London, WC1E 6BT, London, UK
P. E. L. Clarke, J. E. Conboy, J. Lauber, E. A. Mckigney, D. J. Miller, A. Rooke, P. Sherwood & A. Skillman
Department of Physics, Schuster Laboratory, The University, M13 9PL, Manchester, UK
J. Allison, R. J. Barlow, C. Beeston, S. D. Bird, I. P. Duerdoth, D. Eatough, J. E. G. Edwards, D. I. Futyan, M. R. Ingram, G. Jones, V. Kartvelishvili, G. D. Lafferty, F. K. Loebinger, N. J. Oldershaw, J. R. Pater, T. G. Shears, K. Stephens, E. H. Vokurka & T. R. Wyatt
Department of Physics, University of Maryland, 20742, College Park, MD, USA
A. H. Ball, C. Y. Chang, C. Dallapiccola, D. G. Fong, M. Foucher, S. M. Gascon-Shotkin, M. Herndon, A. Jawahery, R. G. Kellogg, R. Lahmann, G. Martinez, A. Skuja & G. A. Snow
Laboratoire de Physique Nucléaire, Université de Montréal, H3C 3J7, Montreal, Quebec, Canada
G. Azuelos, M. Doucet, J. Gascon, H. Jeremie, A. Joly, E. Lefebvre, J. P. Martin, R. Tafirout, P. Taras, I. Trigger, P. Vikas & V. Zacek
Department of Physics, University of Oregon, 97403, Eugene, OR, USA
W. P. Lai & D. Strom
Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, Oxfordshire, UK
K. W. Bell, R. M. Brown, N. I. Geddes, T. Geralis, P. W. Jeffreys, B. W. Kennedy, G. N. Patrick, W. G. Scott, M. Sproston & Strom Szymanski
Department of Physics, Technion-Israel Institute of Technology, 32000, Haifa, Israel
S. Dado, J. Goldberg, D. Lazic, A. Mincer, S. A. Robins, Y. Rozen & S. Tarem
Department of Physics and Astronomy, Tel Aviv University, 69978, Tel Aviv, Israel
G. Alexander, G. Bella, I. Cohen, J. Grunhaus, E. K. G. Sarkisyan & E. Tsur
International Centre for Elementary Particle Physics and Department of Physics, University of Tokyo, 113, Tokyo, Japan
S. Asai, K. Ishii, K. Kawagoe, T. Kawamoto, T. Kobayashi, S. Komamiya, T. Mashimo, T. Mori, M. Morii, S. Mihara, I. Nakamura, S. Orito, T. Saeki, S. Tanaka & S. Yamashita
Kobe University, 657, Kobe, Japan
S. Asai, K. Ishii, K. Kawagoe, T. Kawamoto, T. Kobayashi, S. Komamiya, T. Mashimo, T. Mori, M. Morii, S. Mihara, I. Nakamura, S. Orito, T. Saeki, S. Tanaka & S. Yamashita
Brunel University, UB8 3PH, Uxbridge, Middlesex, UK
P. R. Hobson, D. C. Imrie & R. Rylko
Particle Physics Department, Weizmann Institute of Science, 76100, Rehovot, Israel
E. Duchovni, R. Folman, E. Gross, A. Klier, L. Levinson, G. Mikenberg, R. Mir, K. Nagai & G. Yekutieli
II Institut für Experimental Physik, Universität Hamburg/DESY, Notkestrasse 85, D-22607, Hamburg, Germany
V. Blobel, F. Fiedler, R. Hawkings, P. Hüntemeyer, J. Meyer, A. Oh, S. Petzold, A. Sittler, J. Steuerer, A. Wagner & G. W. Wilson
Department of Physics, University of Victoria, P O Box 3055, V8W 3P6, Victoria, BC, Canada
A. K. Honma, R. K. Keeler, G. D. Loug, P. Poffenberger, S. Robertson, J. M. Roney, R. Sobie & J. S. White
Department of Physics, University of British Columbia, V6T 1Z1, Vancouver, BC, Canada
D. Axen, R. Howard, J. Kirk & C. Sbarra
Department of Physics, University of Alberta, T6G 2J1, Edmonton, AB, Canada
R. Davis, A. A. Faust, D. M. Gingrich, K. R. Hossain, P. I. Kayal, A. Macpherson, W. J. McDonald, J. Pinfold, N. Rodning, P. Routenburg & R. W. Springer
Dept of Physics, Duke University, 27708-0305, Durham, NC, USA
S. R. Lautenschlager & A. M. Lee
Research Institute for Particle and Nuclear Physics, P O Box 49, H-1525, Budapest, Hungary
C. Hajdu, D. Horvdth & G. Pásztor
Institute of Nuclear Research, P O Box 51, H-4001, Debrecen, Hungary
B. Dienes, J. Pálinkás & Z. Trócsányi
Sektion Physik, Ludwigs-Maximilians-Universität München, Am Coulombwall 1, D-85748, Garching, Germany
M. Boutemeur, G. Duckeck, A. D. Schaile, O. Schaile & P. Schenk

Authors

K. Ackerstaff
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G. Alexander
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J. Allison
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N. Altekamp
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K. vJ. Anderson
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S. Anderson
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S. Arcellie
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S. Asai
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D. Axen
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G. Azuelos
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A. H. Ball
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E. Barberio
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R. J. Barlow
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R. Bartoldus
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J. R. Batley
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S. Baumann
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J. Bechtluft
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C. Beeston
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T. Behnke
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A. N. Bell
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K. W. Bell
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G. Bella
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S. Bentvelsen
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S. Bethke
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O. Biebel
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A. Biguzzi
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S. D. Bird
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V. Blobel
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I. J. Bloodworth
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J. E. Bloomer
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M. Bobinski
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P. Bock
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D. Bonacorsi
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M. Boutemeur
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B. T. Bouwens
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S. Braibant
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L. Brigliadori
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R. M. Brown
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H. J. Burckhart
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C. Burgard
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R. Bürgin
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P. Capiluppi
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R. K. Carnegie
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A. A. Carter
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J. R. Carter
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C. Y. Chang
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D. G. Charlton
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D. Chrisman
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P. E. L. Clarke
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I. Cohen
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J. E. Conboy
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O. C. Cooke
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M. Cuffiani
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S. Dado
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C. Dallapiccola
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G. M. Dallavalle
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R. Davis
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S. De Jong
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L. A. del Pozo
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K. Desch
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B. Dienes
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M. S. Dixit
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E. do Couto e Silva
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M. Doucet
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E. Duchovni
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G. Duckeck
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I. P. Duerdoth
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D. Eatough
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J. E. G. Edwards
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H. G. Evans
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M. Evans
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M. Fanti
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OPAL Collaboration., Ackerstaff, K., Alexander, G. et al. Search for unstable heavy and excited leptons in e⁺e⁻ collisions at ∝s = 170-172 GeV. Eur. Phys. J. C 1, 45–64 (1998). https://doi.org/10.1007/BF01245797

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Received: 09 September 1997
Published: 27 February 2005
Issue Date: March 1998
DOI: https://doi.org/10.1007/BF01245797

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Search for unstable heavy and excited leptons in e⁺e⁻ collisions at ∝s = 170-172 GeV

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Search for an excited lepton that decays via a contact interaction to a lepton and two jets in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

Search for excited leptons in proton-proton collisions at $$ \sqrt{s}=8 $$ TeV

Search for long-lived particles decaying to $$e ^\pm $$ $$\mu ^\mp $$ $$\nu $$

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Search for unstable heavy and excited leptons in e+e− collisions at ∝s = 170-172 GeV

Abstract

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Search for an excited lepton that decays via a contact interaction to a lepton and two jets in proton-proton collisions at $$ \sqrt{s} $$ = 13 TeV

Search for excited leptons in proton-proton collisions at $$ \sqrt{s}=8 $$ TeV

Search for long-lived particles decaying to $$e ^\pm $$ $$\mu ^\mp $$ $$\nu $$

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Search for unstable heavy and excited leptons in e⁺e⁻ collisions at ∝s = 170-172 GeV