Search for scalar leptoquarks from Z(0) decays

Search for scalar leptoquarks from Z(0) decays

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Search for scalar leptoquarks from Z(0) decays

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DELPHI Collaboration; Allen, Paul; Llosá Reig, Rafael; Benlloch Baviera, José María; Castillo Giménez, María Victoria Perfil; Fez Laso, M. D. M. de; Ferrer Soria, Antonio Perfil; Fuster Verdú, Juan A. Perfil; García García, Carmen Perfil; Gómez Cadenas, Juan José Perfil; Hernández Rey, Juan José Perfil; Higón Rodríguez, Emilio Perfil; Lozano Bahilo, José Julio; Lacasta Llácer, Carlos; Martí García, Salvador; Sánchez Rojo, María Ester; Salt Cairols, José Perfil; Valls Ferrer, Juan Antonio; Zúñiga Román, Juan
This document is a artículoDate1992

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We have searched for pair produced scalar leptoquarks each decaying to a quark and a charged lepton in a sample of 116 000 hadronic Z0 events produced at LEP. No candidate was detected and cross section and branching ratio limits are set for the above process at 95% CL. Mass limits are found to be about 42 GeV/c2 depending only slightly on the models used and a coupling times branching ratio exclusion line is drawn for a scalar leptoquark with a free coupling. We have also probed the mass region above 45 GeV/c2 for a singly produced scalar leptoquark and set limits on the cross section and the coupling lambda(2)/4-pi up to 60 GeV.

    DELPHI Collaboration Allen, Paul Llosá Reig, Rafael Benlloch Baviera, José María Castillo Giménez, María Victoria Fez Laso, M. D. M. de Ferrer Soria, Antonio Fuster Verdú, Juan A. García García, Carmen Gómez Cadenas, Juan José Hernández Rey, Juan José Higón Rodríguez, Emilio Lozano Bahilo, José Julio Lacasta Llácer, Carlos Martí García, Salvador Sánchez Rojo, María Ester Salt Cairols, José Valls Ferrer, Juan Antonio Zúñiga Román, Juan 1992 Search for scalar leptoquarks from Z(0) decays Physics Letters B 275 1-2 220 230

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