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Fourth-generation quark mass limits in CKM-element space
Phys. Rev. D 83, 114048 – Published 27 June, 2011
DOI: https://doi.org/10.1103/PhysRevD.83.114048
Abstract
We present a reanalysis of CDF data to extend limits on individual fourth-generation quark masses from particular flavor-mixing rates to the entire space of possible mixing values. Measurements from CDF have set individual limits on masses, and , at the level of 335–385 GeV assuming specific and favorable flavor-mixing rates. We consider the space of possible values for the mixing rates and find that the CDF data imply limits of 290 GeV and greater over a wide range of mixing scenarios. We also analyze the limits from the perspective of a four-generation Cabibbo-Kobayashi-Maskawa (CKM) matrix. We find that present experimental constraints on CKM elements do not suggest further constraints on fourth-generation quark masses.
See Also
Direct Mass Limits for Chiral Fourth-Generation Quarks in All Mixing Scenarios
Article Text
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