A search for leptoquarks and squarks at HERA

Ahmed, T.; Aid, S.; Andreev, V.; Andrieu, B.; Appuhn, R. -D.; Arpagaus, M.; Babaev, A.; Baehr, J.; Bán, J.; Baranov, P.; Barrelet, E.; Bartel, W.; Barth, M.; Bassler, U.; Beck, H. P.; Behrend, H. -J.; Belousov, A.; Berger, Ch.; Bergstein, H.; Bernardi, G.; Bernet, R.; Bertrand-Coremans, G.; Besançon, M.; Beyer, R.; Biddulph, P.; Bizot, J. C.; Blobel, V.; Borras, K.; Botterweck, F.; Boudry, V.; Braemer, A.; Brasse, F.; Braunschweig, W.; Brisson, V.; Bruncko, D.; Brune, C.; Buchholz, R.; Büngener, L.; Bürger, J.; Büsser, F. W.; Buniatian, A.; Burke, S.; Buschhorn, G.; Campbell, A. J.; Carli, T.; Charles, F.; Clarke, D.; Clegg, A. B.; Colombo, M.; Contreras, J. G.; Coughlan, J. A.; Courau, A.; Coutures, Ch.; Cozzika, G.; Criegee, L.; Cussans, D. G.; Cvach, J.; Dagoret, S.; Dainton, J. B.; Danilov, M.; Dau, W. D.; Daum, K.; David, M.; Deffur, E.; Delcourt, B.; Del Buono, L.; De Roeck, A.; De Wolf, E. A.; Di Nezza, P.; Dollfus, C.; Dowell, J. D.; Dreis, H. B.; Duboc, J.; Düllmann, D.; Dünger, O.; Duhm, H.; Ebert, J.; Ebert, T. R.; Eckerlin, G.; Efremenko, V.; Egli, S.; Ehrlichmann, H.; Eichenberger, S.; Eichler, R.; Eisele, F.; Eisenhandler, E.; Ellison, R. J.; Elsen, E.; Erdmann, M.; Erdmann, W.; Evrard, E.; Favart, L.; Fedotov, A.; Feeken, D.; Felst, R.; Feltesse, J.; Ferencei, J.; Ferrarotto, F.; Flamm, K.; Fleischer, M.; Flieser, M.; Flügge, G.; Fomenko, A.; Fominykh, B.; Forbush, M.; Formánek, J.; Foster, J. M.; Franke, G.; Fretwurst, E.; Gabathuler, E.; Gabathuler, K.; Gamerdinger, K.; Garvey, J.; Gayler, J.; Gebauer, M.; Gellrich, A.; Genzel, H.; Gerhards, R.; Goerlach, U.; Goerlich, L.; Gogitidze, N.; Goldberg, M.; Goldner, D.; Gonzalez-Pineiro, B.; Goodall, A. M.; Gorelov, I.; Goritchev, P.; Grab, C.; Grässler, H.; Grässler, R.; Greenshaw, T.; Grindhammer, G.; Gruber, A.; Gruber, C.; Haack, J.; Haidt, D.; Hajduk, L.; Hamon, O.; Hampel, M.; Hanlon, E. M.; Hapke, M.; Haynes, W. J.; Heatherington, J.; Hedberg, V.; Heinzelmann, G.; Henderson, R. C. W.; Henschel, H.; Herma, R.; Herynek, I.; Hess, M. F.; Hildesheim, W.; Hill, P.; Hiller, K. H.; Hilton, C. D.; Hladký, J.; Hoeger, K. C.; Höppner, M.; Horisberger, R.; Huet, Ph.; Hufnagel, H.; Ibbotson, M.; Itterbeck, H.; Jabiol, M. -A.; Jacholkowska, A.; Jacobsson, C.; Jaffre, M.; Janoth, J.; Jansen, T.; Jönsson, L.; Johannsen, K.; Johnson, D. P.; Johnson, L.; Jung, H.; Kalmus, P. I. P.; Kant, D.; Kaschowitz, R.; Kasselmann, P.; Kathage, U.; Kaufmann, H. H.; Kazarian, S.; Kenyon, I. R.; Kermiche, S.; Keuker, C.; Kiesling, C.; Klein, M.; Kleinwort, C.; Knies, G.; Ko, W.; Köhler, T.; Kolanoski, H.; Kole, F.; Kolya, S. D.; Korbel, V.; Korn, M.; Kostka, P.; Kotelnikov, S. K.; Krasny, M. W.; Krehbiel, H.; Krücker, D.; Krüger, U.; Krüner-Marquis, U.; Kubenka, J. P.; Küster, H.; Kuhlen, M.; Kurča, T.; Kurzhöfer, J.; Kuznik, B.; Lacour, D.; Lamarche, F.; Lander, R.; Landon, M. P. J.; Lange, W.; Lanius, P.; Laporte, J. -F.; Lebedev, A.; Leverenz, C.; Levonian, S.; Ley, Ch.; Lindner, A.; Lindström, G.; Linsel, F.; Lipinski, J.; List, B.; Loch, P.; Lohmander, H.; Lopez, G. C.; Lüke, D.; Magnussen, N.; Malinovski, E.; Mani, S.; Maraček, R.; Marage, P.; Marks, J.; Marshall, R.; Martens, J.; Martin, R.; Martyn, H. -U.; Martyniak, J.; Masson, S.; Mavroidis, T.; Maxfield, S. J.; McMahon, S. J.; Mehta, A.; Meier, K.; Mercer, D.; Merz, T.; Meyer, C. A.; Meyer, H.; Meyer, J.; Mikocki, S.; Milstead, D.; Moreau, F.; Morris, J. V.; Müller, G.; Müller, K.; Murín, P.; Nagovizin, V.; Nahnhauer, R.; Naroska, B.; Naumann, Th.; Newman, P. R.; Newton, D.; Neyret, D.; Nguyen, H. K.; Niebergall, F.; Niebuhr, C.; Nisius, R.; Nowak, G.; Noyes, G. W.; Nyberg-Werther, M.; Oberlack, H.; Obrock, U.; Olsson, J. E.; Panaro, E.; Panitch, A.; Pascaud, C.; Patel, G. D.; Peppel, E.; Perez, E.; Phillips, J. P.; Pichler, Ch.; Pitzl, D.; Pope, G.; Prell, S.; Prosi, R.; Rädel, G.; Raupach, F.; Reimer, P.; Reinshagen, S.; Ribarics, P.; Riech, V.; Riedlberger, J.; Riess, S.; Rietz, M.; Robertson, S. M.; Robmann, P.; Roloff, H. E.; Roosen, R.; Rosenbauer, K.; Rostovtsev, A.; Rouse, F.; Royon, C.; Rüter, K.; Rusakov, S.; Rybicki, K.; Rylko, R.; Sahlmann, N.; Sanchez, E.; Sankey, D. P. C.; Savitsky, M.; Schacht, P.; Schiek, S.; Schleper, P.; von Schlippe, W.; Schmidt, C.; Schmidt, D.; Schmidt, G.; Schöning, A.; Schröder, V.; Schuhmann, E.; Schwab, B.; Schwind, A.; Seehausen, U.; Sefkow, F.; Seidel, M.; Sell, R.; Semenov, A.; Shekelyan, V.; Sheviakov, I.; Shooshtari, H.; Shtarkov, L. N.; Siegmon, G.; Siewert, U.; Sirois, Y.; Skillicorn, I. O.; Smirnov, P.; Smith, J. R.; Soloviev, Y.; Spitzer, H.; Starosta, R.; Steenbock, M.; Steffen, P.; Steinberg, R.; Stella, B.; Stephens, K.; Stier, J.; Stiewe, J.; Stösslein, U.; Strachota, J.; Straumann, U.; Struczinski, W.; Sutton, J. P.; Tapprogge, S.; Taylor, R. E.; Tchernyshov, V.; Thiebaux, C.; Thompson, G.; Tichomirov, I.; Truöl, P.; Turnau, J.; Tutas, J.; Uelkes, P.; Usik, A.; Valkár, S.; Valkárová, A.; Vallée, C.; Van Esch, P.; Van Mechelen, P.; Vartapetian, A.; Vazdik, Y.; Vecko, M.; Verrecchia, P.; Villet, G.; Wacker, K.; Wagener, A.; Wagener, M.; Walker, I. W.; Walther, A.; Weber, G.; Weber, M.; Wegener, D.; Wegner, A.; Wellisch, H. P.; West, L. R.; Willard, S.; Winde, M.; Winter, G. -G.; Wright, A. E.; Wünsch, E.; Wulff, N.; Yiou, T. P.; Žáček, J.; Zarbock, D.; Zhang, Z.; Zimmer, M.; Zimmermann, W.; Zomer, F.; Zuber, K.

doi:10.1007/BF01957769

A search for leptoquarks and squarks at HERA

Experimental Physics
Published: December 1994

Volume 64, pages 545–558, (1994)
Cite this article

Zeitschrift für Physik C Particles and Fields

Hl Collaboration,
T. Ahmed³,
S. Aid¹⁴,
V. Andreev²⁵,
B. Andrieu²⁹,
R. -D. Appuhn¹²,
M. Arpagaus³⁷,
A. Babaev²⁷,
J. Baehr³⁶,
J. Bán¹⁸,
P. Baranov²⁵,
E. Barrelet³⁰,
W. Bartel¹²,
M. Barth^4,5,
U. Bassler³⁰,
H. P. Beck³⁸,
H. -J. Behrend¹²,
A. Belousov²⁵,
Ch. Berger¹,
H. Bergstein¹,
G. Bernardi³⁰,
R. Bernet³⁷,
G. Bertrand-Coremans^4,5,
M. Besançon¹⁰,
R. Beyer¹²,
P. Biddulph²³,
J. C. Bizot²⁸,
V. Blobel¹⁴,
K. Borras⁹,
F. Botterweck^4,5,
V. Boudry²⁹,
A. Braemer¹⁵,
F. Brasse¹²,
W. Braunschweig¹,
V. Brisson²⁸,
D. Bruncko¹⁸,
C. Brune¹⁶,
R. Buchholz¹²,
L. Büngener¹⁴,
J. Bürger¹²,
F. W. Büsser¹⁴,
A. Buniatian¹²^nAff21,
S. Burke¹⁹,
G. Buschhorn²⁷,
A. J. Campbell¹²,
T. Carli²⁷,
F. Charles¹²,
D. Clarke⁶,
A. B. Clegg¹⁹,
M. Colombo⁹,
J. G. Contreras⁹,
J. A. Coughlan⁶,
A. Courau²⁸,
Ch. Coutures¹⁰,
G. Cozzika¹⁰,
L. Criegee¹²,
D. G. Cussans⁶,
J. Cvach³¹,
S. Dagoret³⁰,
J. B. Dainton²⁰,
M. Danilov²⁴,
W. D. Dau¹⁷,
K. Daum³⁵,
M. David¹⁰,
E. Deffur¹²,
B. Delcourt²⁸,
L. Del Buono³⁰,
A. De Roeck¹²,
E. A. De Wolf^4,5,
P. Di Nezza³³,
C. Dollfus³⁸,
J. D. Dowell³,
H. B. Dreis²,
J. Duboc³⁰,
D. Düllmann¹⁴,
O. Dünger¹⁴,
H. Duhm¹³,
J. Ebert³⁵,
T. R. Ebert²⁰,
G. Eckerlin¹²,
V. Efremenko²⁴,
S. Egli³⁸,
H. Ehrlichmann³⁶,
S. Eichenberger³⁸,
R. Eichler³⁷,
F. Eisele¹⁵,
E. Eisenhandler²¹,
R. J. Ellison²³,
E. Elsen¹²,
M. Erdmann¹⁵,
W. Erdmann³⁷,
E. Evrard^4,5,
L. Favart^4,5,
A. Fedotov²⁴,
D. Feeken¹⁴,
R. Felst¹²,
J. Feltesse¹⁰,
J. Ferencei¹⁶,
F. Ferrarotto³³,
K. Flamm¹²,
M. Fleischer¹²,
M. Flieser²⁷,
G. Flügge²,
A. Fomenko²⁵,
B. Fominykh²⁴,
M. Forbush⁸,
J. Formánek³²,
J. M. Foster²³,
G. Franke¹²,
E. Fretwurst¹³,
E. Gabathuler²⁰,
K. Gabathuler³⁴,
K. Gamerdinger²⁷,
J. Garvey³,
J. Gayler¹²,
M. Gebauer⁹,
A. Gellrich¹⁴,
H. Genzel¹,
R. Gerhards¹²,
U. Goerlach¹²,
L. Goerlich⁷,
N. Gogitidze²⁵,
M. Goldberg³⁰,
D. Goldner⁹,
B. Gonzalez-Pineiro³⁰,
A. M. Goodall²⁰,
I. Gorelov²⁴,
P. Goritchev²⁴,
C. Grab³⁷,
H. Grässler²,
R. Grässler²,
T. Greenshaw²⁰,
G. Grindhammer²⁷,
A. Gruber²⁷,
C. Gruber¹⁷,
J. Haack³⁶,
D. Haidt¹²,
L. Hajduk⁷,
O. Hamon³⁰,
M. Hampel¹,
E. M. Hanlon¹⁹,
M. Hapke¹²,
W. J. Haynes⁶,
J. Heatherington²¹,
V. Hedberg²²,
G. Heinzelmann¹⁴,
R. C. W. Henderson¹⁹,
H. Henschel³⁶,
R. Herma¹,
I. Herynek³¹,
M. F. Hess²⁷,
W. Hildesheim¹³,
P. Hill⁶,
K. H. Hiller³⁶,
C. D. Hilton²³,
J. Hladký³¹,
K. C. Hoeger²³,
M. Höppner⁹,
R. Horisberger³⁴,
Ph. Huet^4,5,
H. Hufnagel¹⁵,
M. Ibbotson²³,
H. Itterbeck¹,
M. -A. Jabiol¹⁰,
A. Jacholkowska²⁸,
C. Jacobsson²²,
M. Jaffre²⁸,
J. Janoth¹⁶,
T. Jansen¹²,
L. Jönsson²²,
K. Johannsen¹⁴,
D. P. Johnson^4,5,
L. Johnson¹⁹,
H. Jung¹²,
P. I. P. Kalmus²¹,
D. Kant²¹,
R. Kaschowitz²,
P. Kasselmann¹³,
U. Kathage¹⁷,
H. H. Kaufmann³⁶,
S. Kazarian¹²,
I. R. Kenyon³,
S. Kermiche²⁸,
C. Keuker¹,
C. Kiesling²⁷,
M. Klein³⁶,
C. Kleinwort¹⁴,
G. Knies¹²,
W. Ko⁸,
T. Köhler¹,
H. Kolanoski⁹,
F. Kole⁸,
S. D. Kolya²³,
V. Korbel¹²,
M. Korn⁹,
P. Kostka³⁶,
S. K. Kotelnikov²⁵,
M. W. Krasny^7,30,
H. Krehbiel¹²,
D. Krücker²,
U. Krüger¹²,
U. Krüner-Marquis¹²,
J. P. Kubenka²⁷,
H. Küster²,
M. Kuhlen²⁷,
T. Kurča¹⁸,
J. Kurzhöfer⁹,
B. Kuznik³⁵,
D. Lacour³⁰,
F. Lamarche²⁹,
R. Lander⁸,
M. P. J. Landon²¹,
W. Lange³⁶,
P. Lanius²⁷,
J. -F. Laporte¹⁰,
A. Lebedev²⁵,
C. Leverenz¹²,
S. Levonian^12,25,
Ch. Ley²,
A. Lindner⁹,
G. Lindström¹³,
F. Linsel¹²,
J. Lipinski¹⁴,
B. List¹²,
P. Loch²⁸,
H. Lohmander²²,
G. C. Lopez²¹,
D. Lüke^9,12,
N. Magnussen³⁵,
E. Malinovski²⁵,
S. Mani⁸,
R. Maraček¹⁸,
P. Marage^4,5,
J. Marks²⁶,
R. Marshall²³,
J. Martens³⁵,
R. Martin²⁰,
H. -U. Martyn¹,
J. Martyniak⁷,
S. Masson²,
T. Mavroidis²¹,
S. J. Maxfield²⁰,
S. J. McMahon²⁰,
A. Mehta²³,
K. Meier¹⁶,
D. Mercer²³,
T. Merz¹²,
C. A. Meyer³⁸,
H. Meyer³⁵,
J. Meyer¹²,
S. Mikocki⁷,
D. Milstead²⁰,
F. Moreau²⁹,
J. V. Morris⁶,
G. Müller¹²,
K. Müller³⁸,
P. Murín¹⁸,
V. Nagovizin²⁴,
R. Nahnhauer³⁶,
B. Naroska¹⁴,
Th. Naumann³⁶,
P. R. Newman³,
D. Newton¹⁹,
D. Neyret³⁰,
H. K. Nguyen³⁰,
F. Niebergall¹⁴,
C. Niebuhr¹²,
R. Nisius¹,
G. Nowak⁷,
G. W. Noyes⁶,
M. Nyberg-Werther²²,
H. Oberlack²⁷,
U. Obrock⁹,
J. E. Olsson¹²,
E. Panaro¹³,
A. Panitch^4,5,
C. Pascaud²⁸,
G. D. Patel²⁰,
E. Peppel¹²,
E. Perez¹⁰,
J. P. Phillips²³,
Ch. Pichler¹³,
D. Pitzl³⁷,
G. Pope⁸,
S. Prell¹²,
R. Prosi¹²,
G. Rädel¹²,
F. Raupach¹,
P. Reimer³¹,
S. Reinshagen¹²,
P. Ribarics²⁷,
V. Riech¹³,
J. Riedlberger³⁷,
S. Riess¹⁴,
M. Rietz²,
S. M. Robertson³,
P. Robmann³⁸,
H. E. Roloff³⁶,
R. Roosen^4,5,
K. Rosenbauer¹,
A. Rostovtsev²⁴,
F. Rouse⁸,
C. Royon¹⁰,
K. Rüter²⁷,
S. Rusakov²⁵,
K. Rybicki⁷,
R. Rylko²¹,
N. Sahlmann²,
E. Sanchez²⁷,
D. P. C. Sankey⁶,
M. Savitsky²⁴,
P. Schacht²⁷,
S. Schiek¹²,
P. Schleper¹⁵,
W. von Schlippe²¹,
C. Schmidt¹²,
D. Schmidt³⁵,
G. Schmidt¹⁴,
A. Schöning¹²,
V. Schröder¹²,
E. Schuhmann²⁷,
B. Schwab¹⁵,
A. Schwind³⁶,
U. Seehausen¹⁴,
F. Sefkow¹²,
M. Seidel¹³,
R. Sell¹²,
A. Semenov²⁴,
V. Shekelyan²⁴,
I. Sheviakov²⁵,
H. Shooshtari²⁷,
L. N. Shtarkov²⁵,
G. Siegmon¹⁷,
U. Siewert¹⁷,
Y. Sirois²⁹,
I. O. Skillicorn¹¹,
P. Smirnov²⁵,
J. R. Smith⁸,
Y. Soloviev²⁵,
H. Spitzer¹⁴,
R. Starosta¹,
M. Steenbock¹⁴,
P. Steffen¹²,
R. Steinberg²,
B. Stella³³,
K. Stephens²³,
J. Stier¹²,
J. Stiewe¹⁶,
U. Stösslein³⁶,
J. Strachota³¹,
U. Straumann³⁸,
W. Struczinski²,
J. P. Sutton³,
S. Tapprogge¹⁶,
R. E. Taylor^39,28,
V. Tchernyshov²⁴,
C. Thiebaux²⁹,
G. Thompson²¹,
I. Tichomirov²⁴,
P. Truöl³⁸,
J. Turnau⁷,
J. Tutas¹⁵,
P. Uelkes²,
A. Usik²⁵,
S. Valkár³²,
A. Valkárová³²,
C. Vallée²⁶,
P. Van Esch^4,5,
P. Van Mechelen^4,5,
A. Vartapetian¹²^nAff21,
Y. Vazdik²⁵,
M. Vecko³¹,
P. Verrecchia¹⁰,
G. Villet¹⁰,
K. Wacker⁹,
A. Wagener²,
M. Wagener³⁴,
I. W. Walker¹⁹,
A. Walther⁹,
G. Weber¹⁴,
M. Weber¹²,
D. Wegener⁹,
A. Wegner¹²,
H. P. Wellisch²⁷,
L. R. West³,
S. Willard⁸,
M. Winde³⁶,
G. -G. Winter¹²,
A. E. Wright²³,
E. Wünsch¹²,
N. Wulff¹²,
T. P. Yiou³⁰,
J. Žáček³²,
D. Zarbock¹³,
Z. Zhang²⁸,
M. Zimmer¹²,
W. Zimmermann¹²,
F. Zomer²⁸ &
…
K. Zuber¹⁶

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Abstract

A search in the H1 experiment at HERA for scalar and vector leptoquarks, leptogluons and squarks coupling to first generation fermions is presented in a data sample corresponding to an integrated luminosity of 425 nb⁻¹. For masses ranging up to ∼275 GeV, no significant evidence for the direct production of such particles is found in various possible decay channels. At high masses and beyond the centre of mass energy of 296 GeV a contact interaction analysis is used to further constrain the couplings and masses of new vector leptoquarks and to set lower limits on compositeness scales.

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A. Buniatian & A. Vartapetian
Present address: Yerevan Phys. Inst., Armenia

Authors and Affiliations

I. Physikalisches Institut der RWTH, Aachen, Germany
Ch. Berger, H. Bergstein, W. Braunschweig, H. Genzel, M. Hampel, R. Herma, H. Itterbeck, C. Keuker, T. Köhler, H. -U. Martyn, R. Nisius, F. Raupach, K. Rosenbauer & R. Starosta
III. Physikalisches Institut der RWTH, Aachen, Germany
H. B. Dreis, G. Flügge, H. Grässler, R. Grässler, R. Kaschowitz, D. Krücker, H. Küster, Ch. Ley, S. Masson, M. Rietz, N. Sahlmann, R. Steinberg, W. Struczinski, P. Uelkes & A. Wagener
School of Physics and Space Research, University of Birmingham, Birmingham, UK
T. Ahmed, J. D. Dowell, J. Garvey, I. R. Kenyon, P. R. Newman, S. M. Robertson, J. P. Sutton & L. R. West
Inter-University Institute for High Energies ULB-VUB, Brussels, Belgium
M. Barth, G. Bertrand-Coremans, F. Botterweck, E. A. De Wolf, E. Evrard, L. Favart, Ph. Huet, D. P. Johnson, P. Marage, A. Panitch, R. Roosen, P. Van Esch & P. Van Mechelen
Universitaire Instellingen Antwerpen, Wilrijk, Belgium
M. Barth, G. Bertrand-Coremans, F. Botterweck, E. A. De Wolf, E. Evrard, L. Favart, Ph. Huet, D. P. Johnson, P. Marage, A. Panitch, R. Roosen, P. Van Esch & P. Van Mechelen
Rutherford Appleton Laboratory, Chilton, Didcot, UK
D. Clarke, J. A. Coughlan, D. G. Cussans, W. J. Haynes, P. Hill, J. V. Morris, G. W. Noyes & D. P. C. Sankey
Institute for Nuclear Physics, Cracow, Poland
L. Goerlich, L. Hajduk, M. W. Krasny, J. Martyniak, S. Mikocki, G. Nowak, K. Rybicki & J. Turnau
Physics Department and IIRPA, University of California, Davis, California, USA
M. Forbush, W. Ko, F. Kole, R. Lander, S. Mani, G. Pope, F. Rouse, J. R. Smith & S. Willard
Institut für Physik, Universität Dortmund, Dortmund, Germany
K. Borras, M. Colombo, J. G. Contreras, M. Gebauer, D. Goldner, M. Höppner, H. Kolanoski, M. Korn, J. Kurzhöfer, A. Lindner, D. Lüke, U. Obrock, K. Wacker, A. Walther & D. Wegener
CEA, DSM/DAPNIA, CE-SACLAY, Gif-sur-Yvette, France
M. Besançon, Ch. Coutures, G. Cozzika, M. David, J. Feltesse, M. -A. Jabiol, J. -F. Laporte, E. Perez, C. Royon, P. Verrecchia & G. Villet
Department of Physics and Astronomy, University of Glasgow, Glasgow, UK
I. O. Skillicorn
DESY, Hamburg, Germany
R. -D. Appuhn, W. Bartel, H. -J. Behrend, R. Beyer, F. Brasse, R. Buchholz, J. Bürger, A. Buniatian, A. J. Campbell, F. Charles, L. Criegee, E. Deffur, A. De Roeck, G. Eckerlin, E. Elsen, R. Felst, K. Flamm, M. Fleischer, G. Franke, J. Gayler, R. Gerhards, U. Goerlach, D. Haidt, M. Hapke, T. Jansen, H. Jung, S. Kazarian, G. Knies, V. Korbel, H. Krehbiel, U. Krüger, U. Krüner-Marquis, C. Leverenz, S. Levonian, F. Linsel, B. List, D. Lüke, T. Merz, J. Meyer, G. Müller, C. Niebuhr, J. E. Olsson, E. Peppel, S. Prell, R. Prosi, G. Rädel, S. Reinshagen, S. Schiek, C. Schmidt, A. Schöning, V. Schröder, F. Sefkow, R. Sell, P. Steffen, J. Stier, A. Vartapetian, M. Weber, A. Wegner, G. -G. Winter, E. Wünsch, N. Wulff, M. Zimmer & W. Zimmermann
I. Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
H. Duhm, E. Fretwurst, W. Hildesheim, P. Kasselmann, G. Lindström, E. Panaro, Ch. Pichler, V. Riech, M. Seidel & D. Zarbock
II. Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany
S. Aid, V. Blobel, L. Büngener, F. W. Büsser, D. Düllmann, O. Dünger, D. Feeken, A. Gellrich, G. Heinzelmann, K. Johannsen, C. Kleinwort, J. Lipinski, B. Naroska, F. Niebergall, S. Riess, G. Schmidt, U. Seehausen, H. Spitzer, M. Steenbock & G. Weber
Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany
A. Braemer, F. Eisele, M. Erdmann, H. Hufnagel, P. Schleper, B. Schwab & J. Tutas
Institut für Hochenergiephysik, Universität Heidelberg, Heidelberg, Germany
C. Brune, J. Ferencei, J. Janoth, K. Meier, J. Stiewe, S. Tapprogge & K. Zuber
Institut für Reine und Angewandte Kernphysik, Universität-Kiel, Kiel, Germany
W. D. Dau, C. Gruber, U. Kathage, G. Siegmon & U. Siewert
Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic
J. Bán, D. Bruncko, T. Kurča, R. Maraček & P. Murín
School of Physics and Materials, University of Lancaster, Lancaster, UK
S. Burke, A. B. Clegg, E. M. Hanlon, R. C. W. Henderson, L. Johnson, D. Newton & I. W. Walker
Department of Physics, University of Liverpool, Liverpool, UK
J. B. Dainton, T. R. Ebert, E. Gabathuler, A. M. Goodall, T. Greenshaw, R. Martin, S. J. Maxfield, S. J. McMahon, D. Milstead & G. D. Patel
Queen Mary and Westfield College, London, UK
E. Eisenhandler, J. Heatherington, P. I. P. Kalmus, D. Kant, M. P. J. Landon, G. C. Lopez, T. Mavroidis, R. Rylko, W. von Schlippe & G. Thompson
Physics Department, University of Lund, Lund, Sweden
V. Hedberg, C. Jacobsson, L. Jönsson, H. Lohmander & M. Nyberg-Werther
Physics Department, University of Manchester, Manchester, UK
P. Biddulph, R. J. Ellison, J. M. Foster, C. D. Hilton, K. C. Hoeger, M. Ibbotson, S. D. Kolya, R. Marshall, A. Mehta, D. Mercer, J. P. Phillips, K. Stephens & A. E. Wright
Institute for Theoretical and Experimental Physics, Moscow, Russia
M. Danilov, V. Efremenko, A. Fedotov, B. Fominykh, I. Gorelov, P. Goritchev, V. Nagovizin, A. Rostovtsev, M. Savitsky, A. Semenov, V. Shekelyan, V. Tchernyshov & I. Tichomirov
Lebedev Physical Institute, Moscow, Russia
V. Andreev, P. Baranov, A. Belousov, A. Fomenko, N. Gogitidze, S. K. Kotelnikov, A. Lebedev, S. Levonian, E. Malinovski, S. Rusakov, I. Sheviakov, L. N. Shtarkov, P. Smirnov, Y. Soloviev, A. Usik & Y. Vazdik
CPPM, Université d'Aix-Marseille II, IN2P3-CNRS, Marseille, France
J. Marks & C. Vallée
Max-Planck-Institut für Physik, München, Germany
A. Babaev, G. Buschhorn, T. Carli, M. Flieser, K. Gamerdinger, G. Grindhammer, A. Gruber, M. F. Hess, C. Kiesling, J. P. Kubenka, M. Kuhlen, P. Lanius, H. Oberlack, P. Ribarics, K. Rüter, E. Sanchez, P. Schacht, E. Schuhmann, H. Shooshtari & H. P. Wellisch
LAL, Université de Paris-Sud, IN2P3-CNRS, Orsay, France
J. C. Bizot, V. Brisson, A. Courau, B. Delcourt, A. Jacholkowska, M. Jaffre, S. Kermiche, P. Loch, C. Pascaud, R. E. Taylor, Z. Zhang & F. Zomer
LPNHE, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France
B. Andrieu, V. Boudry, F. Lamarche, F. Moreau, Y. Sirois & C. Thiebaux
LPNHE, Universités Paris VI and VII, IN2P3-CNRS, Paris, France
E. Barrelet, U. Bassler, G. Bernardi, S. Dagoret, L. Del Buono, J. Duboc, M. Goldberg, B. Gonzalez-Pineiro, O. Hamon, M. W. Krasny, D. Lacour, D. Neyret, H. K. Nguyen & T. P. Yiou
Institute of Physics, Czech Academy of Sciences, Praha, Czech Republic
J. Cvach, I. Herynek, J. Hladký, P. Reimer, J. Strachota & M. Vecko
Nuclear Center, Charles University, Praha, Czech Republic
J. Formánek, S. Valkár, A. Valkárová & J. Žáček
INFN Roma and Dipartimento di Fisica, Universita “La Sapienza”, Roma, Italy
P. Di Nezza, F. Ferrarotto & B. Stella
Paul Scherrer Institut, Villigen, Switzerland
K. Gabathuler, R. Horisberger & M. Wagener
Fachbereich Physik, Bergische Universität Gesamthochschule Wuppertal, Wuppertal, Germany
K. Daum, J. Ebert, B. Kuznik, N. Magnussen, J. Martens, H. Meyer & D. Schmidt
DESY, Institut für Hochenergiephysik, Zeuthen, Germany
J. Baehr, H. Ehrlichmann, J. Haack, H. Henschel, K. H. Hiller, H. H. Kaufmann, M. Klein, P. Kostka, W. Lange, R. Nahnhauer, Th. Naumann, H. E. Roloff, A. Schwind, U. Stösslein & M. Winde
Institut für Teilchenphysik, ETH, Zürich, Switzerland
M. Arpagaus, R. Bernet, R. Eichler, W. Erdmann, C. Grab, D. Pitzl & J. Riedlberger
Physik-Institut der Universität Zürich, Zürich, Switzerland
H. P. Beck, C. Dollfus, S. Egli, S. Eichenberger, C. A. Meyer, K. Müller, P. Robmann, U. Straumann & P. Truöl
Stanford Linear Accelerator Center, Stanford, California, USA
R. E. Taylor

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Supported by the Bundesministerium für Forschung und Technologie, FRG under contract numbers 6AC17P, 6AC47P, 6DO571, 6HH17P, 6HH271, 6HD171, 6HD271, 6KH7P, 6MP171, and 6WT87P

Supported by the UK Particle Physics and Astronomy Research Council, and formerly by the UK Science and Engineering Research Council

Supported by FNRS-NFWO, IISN-IIKW

Supported by the Polish State Committee for Scientific Research, grant No. 204209101

Supported in part by USDOE grant DE F603 91ER40674

Supported by the Swedish Natural Science Research Council

Supported by GA ČR, grant no. 202/93/2423 and by GA AV ČR, grant no. 19095

Supported by the Swiss National Science Foundation

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Hl Collaboration., Ahmed, T., Aid, S. et al. A search for leptoquarks and squarks at HERA. Z. Phys. C - Particles and Fields 64, 545–558 (1994). https://doi.org/10.1007/BF01957769

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Received: 09 September 1994
Issue Date: December 1994
DOI: https://doi.org/10.1007/BF01957769

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A search for leptoquarks and squarks at HERA

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A search for leptoquarks and squarks at HERA

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Cornering scalar leptoquarks at LHC

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