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<Emphasis Type="Italic">Z</Emphasis> lineshape versus fourth-generation masses |
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| Authors: | S S Bulanov V A Novikov L B Okun A N Rozanov M I Vysotsky |
| Institution: | (1) CPPM, IN2P3, CNRS, Universite Mediteranee, Marseilles, France;(2) Institute for Theoretical and Experimental Physics, Bol'shaya Cheremushkinskaya ul. 25, Moscow, 117259, Russia;(3) ITEP, Moscow, Russia |
| Abstract: | The dependence of the Z-resonance shape on the location of the threshold of the N\(\bar N\) production (N is the fourth-generation neutrino) is analyzed. The bounds on the existence of the fourth generation are derived from the comparison of the theoretical expression for the Z lineshape with the experimental data. The fourth generation is excluded at 95% C.L. for m N <46.7±0.2 GeV. |
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