Updated search for the flavor-changing neutral-current decay D0→μ+μ- in pp̅ collisions at √s=1.96 TeV

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URI: http://hdl.handle.net/10902/2265
ISSN: 1550-7998
ISSN: 1550-2368
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Autoría
Aaltonen, Timo Antero; Álvarez González, Bárbara; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, GervasioAutoridad Unican; Palencia Cortezón, José Enrique; Rodrigo Anoro, TeresaAutoridad Unican; Ruiz Jimeno, AlbertoAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vila Álvarez, Iván Autoridad Unican; Vilar Cortabitarte, RocíoAutoridad Unican
Fecha
2010-11-10
Derechos
© 2010 American Physical Society
Publicado en
Physical Review D - Particles, Fields, Gravitation and Cosmology, 2010, 82(9), 091105(R)
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American Physical Society
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Resumen/Abstract
We report on a search for the flavor-changing neutral-current decay D0→μ+μ- in pp̅ collisions at √s=1.96  TeV using 360  pb-1 of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. A displaced vertex trigger selects long-lived D0 candidates in the μ+μ-, π+π-, and K-π+ decay modes. We use the Cabibbo-favored D0→K-π+ channel to optimize the selection criteria in an unbiased manner, and the kinematically similar D0→π+π- channel for normalization. We set an upper limit on the branching fraction B(D0→μ+μ-)<2.1×10-7(3.0×10-7) at the 90% (95%) confidence level.
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