2004/12/31 by Prasanta Kumar Das, Kwei-Chou Yang · 3 citations
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Lambda #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.71.094002
published as Phys.Rev. D71 (2005) 094002 · 24 pages, 1 figure, 6 tables; some numerical results corrected; to appear in Phys. Rev. D
arxiv created 2005/05/01 · openalex publication_date 2005/05/05 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The recent observations of sizable transverse fractions of B\ensuremath→\ensuremathφK* may hint for the existence of new physics. We analyze all possible new-physics four-quark operators and find that two classes of new-physics operators could offer resolutions to the B\ensuremath→\ensuremathφK* polarization anomaly. The operators in the first class have structures (1\ensuremath-\ensuremathγ5)\ensuremath\bigotimes(1\ensuremath-\ensuremathγ5), \ensuremathσ(1\ensuremath-\ensuremathγ5)\ensuremath\bigotimes\ensuremathσ(1\ensuremath-\ensuremathγ5), and in the second class (1+\ensuremathγ5)\ensuremath\bigotimes(1+\ensuremathγ5), \ensuremathσ(1+\ensuremathγ5)\ensuremath\bigotimes\ensuremathσ(1+\ensuremathγ5). For each class, the new-physics effects can be lumped into a single parameter. Two possible experimental results of polarization phases, arg(A_\ensuremath⊥)\ensuremath-arg(A_\ensuremath∥)\ensuremath≈\ensuremathπ or 0, originating from the phase ambiguity in data, could be separately accounted for by our two new-physics scenarios: the first (second) scenario with the first (second) class new-physics operators. The consistency between the data and our new-physics analysis suggests a small new-physics weak phase, together with a large(r) strong phase. We obtain sizable transverse fractions \ensuremathΛ_\ensuremath∥ \ensuremath∥+\ensuremathΛ_\ensuremath⊥ \ensuremath⊥\ensuremath≈\ensuremathΛ00, in accordance with the observations. We find \ensuremathΛ_\ensuremath∥ \ensuremath∥\ensuremath≃0.8\ensuremathΛ_\ensuremath⊥ \ensuremath⊥ in the first scenario but \ensuremathΛ_\ensuremath∥ \ensuremath∥\ensuremath\gtrsim\ensuremathΛ_\ensuremath⊥ \ensuremath⊥ in the second scenario. We discuss the impact of the new-physics weak phase on observations.