New physics and CP violation in singly Cabibbo suppressed D decays
By Y. Grossman, A. Kagan, Y. Nir. 2006
281 citations recorded by the source corpus.
We analyze various theoretical aspects of $CP$ violation in singly Cabibbo suppressed (SCS) $D$ meson decays, such as $D\ensuremath{\rightarrow}KK,\ensuremath{\pi}\ensuremath{\pi}$. In particular, we explore the possibility that $CP$ asymmetries will be measured close to the present level of experimental sensitivity of $\mathcal{O}({10}^{\ensuremath{-}2})$. 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 ${10}^{\ensuremath{-}2}$. (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 $\mathcal{O}({10}^{\ensuremath{-}2})$.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/e85431ab10d7df1a144df28c9d3460abb6a8cf3e
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In Nuclear and High Energy Physics
- David M. Straub
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Citations in the corpus
- Implications of LHCb measurements and future prospects - eScholarship (2013, methodology): “Most of the techniques that are sensitive to CP violation make use of the decay asymmetry ACP (f) [410,417].”
- Opportunities in Flavour Physics at the HL-LHC and HE-LHC (2018, background): “SCS D decay modes are sensitives probes of CP violation in and beyond the SM [240].”
- Measurement of CP asymmetry in D0 → K−K+ and D0 → π−π+ decays (2014, unknown): “Indirect CP violation, occurring through D 0 mixing, is expected to be negligible at the current experimental precision [2, 7] and measured to be consistent with zero [8].”