New Physics and CP Violation in Singly Cabibbo Suppressed D Decays

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dc.creatorGrossman, Yuval
dc.creatorKagan, Alexander L.
dc.creatorNir, Yosef
dc.date2006-09-19
dc.date.accessioned2026-07-07T11:05:44Z
dc.date.available2026-07-07T11:05:44Z
dc.descriptionWe analyze various theoretical aspects of CP violation in singly Cabibbo suppressed (SCS) D-meson decays, such as $D \to K K,ππ$. In particular, we explore the possibility that CP asymmetries will be measured close to the present level of experimental sensitivity of $O(10^{-2})$. Such measurements would signal new physics. We make the following points: (i) The mechanism at work in neutral D decays could be indirect or direct CP violation (or both). (ii) One can experimentally distinguish between these possibilities. (iii) If the dominant CP violation is indirect, then there are clear predictions for other modes. (iv) Tree-level direct CP violation in various known models is constrained to be much smaller than $10^{-2}$. (v) SCS decays, unlike Cabibbo favored or doubly Cabibbo suppressed decays, are sensitive to new contributions from QCD penguin operators and especially from chromomagnetic dipole operators. This point is illustrated with supersymmetric gluino-squark loops, which can yield direct CP violating effects of $O(10^{-2})$.
dc.description36 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0609178
dc.identifierhttp://arxiv.org/abs/hep-ph/0609178
dc.identifierPhys.Rev.D75:036008,2007
dc.identifierdoi:10.1103/PhysRevD.75.036008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/189297
dc.subjectHigh Energy Physics - Phenomenology
dc.titleNew Physics and CP Violation in Singly Cabibbo Suppressed D Decays
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