Search for high mass resonances decaying to muon pairs in √s=1.96 TeV pp̅ Collisions
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Aaltonen, Timo Antero; Álvarez González, Bárbara; Álvarez González, Bárbara; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, Gervasio; Palencia Cortezón, José Enrique; Rodrigo Anoro, Teresa



Date
2011-03-21Derechos
© 2011 American Physical Society
Publicado en
Physical Review Letters, 2011, 106(12), 121801
Publisher
American Physical Society
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Abstract:
We present a search for a new narrow, spin-1, high mass resonance decaying to μ+μ-+X, using a matrix-element-based likelihood and a simultaneous measurement of the resonance mass and production rate. In data with 4.6 fb-1 of integrated luminosity collected by the CDF detector in pp̅ collisions at √s=1960 GeV, the most likely signal cross section is consistent with zero at 16% confidence level. We therefore do not observe evidence for a high mass resonance and place limits on models predicting spin-1 resonances, including M>1071 GeV/c2 at 95% confidence level for a Z′ boson with the same couplings to fermions as the Z boson.
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