2002/09/30 by Wafia Bensalam, David London, Nita Sinha +1 · 6 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.67.034007
published as Phys.Rev. D67 (2003) 034007 · 21 pages, LaTeX, 4 figures (included). Paper somewhat reorganized, references greatly expanded, conclusions unchanged
arxiv created 2002/12/09 · openalex publication_date 2003/02/12 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the spin polarizations of both \ensuremathτ leptons in the decay \stackrel\ensuremath→bs\ensuremathτ+\ensuremathτ^\ensuremath-. In addition to the polarization asymmetries involving a single \ensuremathτ, we construct asymmetries for the case where both polarizations are simultaneously measured. We also study forward-backward asymmetries with polarized \ensuremathτ's. We find that a large number of asymmetries are predicted to be large, \ensuremath\gtrsim10%. This permits the measurement of all Wilson coefficients and the b-quark mass, thus allowing the standard model (SM) to be exhaustively tested. Furthermore, there are many unique signals for the presence of new physics. For example, asymmetries involving triple-product correlations are predicted to be tiny within the SM, O(10^\ensuremath-2). Their observation would be a clear signal of new physics.