2006/12/31 by Keith S. M. Lee, Zoltan Ligeti, Iain W. Stewart +1 · 1 citation
Medicine · Physics and Astronomy · #Medical Imaging Techniques and Applications #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevd.75.034016
published as Phys.Rev.D75:034016,2007 · 13 pages, 3 figures, v2: minor improvements in text, references added, v3: journal version
arxiv created 2007/02/16 · openalex publication_date 2007/02/26 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01
We point out that in inclusive B\ensuremath→Xs\ensuremathℓ+\ensuremathℓ^\ensuremath- decay an angular decomposition provides a third (q2 dependent) observable sensitive to a different combination of Wilson coefficients than the rate and the forward-backward asymmetry. Since a precise measurement of q2 dependence requires large data sets, it is important to consider the data integrated over regions of q2. We develop a strategy to extract all measurable Wilson coefficients in B\ensuremath→Xs\ensuremathℓ+\ensuremathℓ^\ensuremath- from a few simple integrated rates in the low q2 region. A similar decomposition in B\ensuremath→K*\ensuremathℓ+\ensuremathℓ^\ensuremath-, together with the B\ensuremath→K*\ensuremathγ rate, also provides a determination of the Wilson coefficients, without reliance on form factor models and without having to measure the zero of the forward-backward asymmetry.