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High Energy Physics - Phenomenology

arXiv:1305.5332 (hep-ph)
[Submitted on 23 May 2013]

Title:Heavy-to-light chromomagentic matrix element

Authors:Maria Dimou, James Lyon, Roman Zwicky
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Abstract:We report the computation of the matrix element of the chromomagnetic operator of the flavour changing neutral current (FCNC)-type between a $B$- or $D$-meson state and a light hadron and off-shell photon. The computation is carried out by using the method of light-cone sum rules (LCSR). It is found that the matrix element exhibits a large strong phase for which we give a long distance interpretation. The analytic structure of the correlation function in use admits a complex anomalous threshold on the physical sheet, the meaning and handling of which within the sum rule approach is discussed. We compare our results to QCD factorisation for which spectator photon emission is end-point divergent.
Comments: 6p, 6 figures, 1 table -- proceedings of 4th Capri Workshop on Flavour Physics
Subjects: High Energy Physics - Phenomenology (hep-ph)
Report number: CP3-Origins-2013-016 DNRF90, DIAS-2013-16
Cite as: arXiv:1305.5332 [hep-ph]
  (or arXiv:1305.5332v1 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.1305.5332

Submission history

From: Roman Zwicky [view email]
[v1] Thu, 23 May 2013 07:08:33 UTC (71 KB)
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