The Role of Collinear Photons in the Rare Decay anti-B --> X(s) l+ l-

Details The Role of Collinear Photons in the Rare Decay anti-B --> X(s) l+ l- The Role of Collinear Photons in the Rare Decay anti-B --> X(s) l+ l-

2008-07-11

arxiv.org/abs/0807.1940v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 2 figures. Contribution to the proceedings of "Les Rencontres de Moriond on QCD 2008" and "Flavor Physics and CP Viol

Scientific paper

We review the phenomenology of the rare decay \bar B -> X_s l+ l-. We present the results of a detailed phenomenological analysis and discuss the role of the decay in the search for new physics at present and future colliders. Moreover, we extensively elaborate on the size of electromagnetic logarithms ln(m_b^2/m_l^2) in view of experimental cuts. We point out the differences in the analyses of BaBar and Belle and give suggestions on how to treat collinear photons in the experimental analyses. These recommendations correspond precisely to theoretical prescriptions and can be combined with measurements performed at a Super-B factory.

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