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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; 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

Aquest document és un/a article, creat/da en: 1992

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.

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