Testing for new physics in singly Cabibbo suppressed D decays

Testing for new physics in singly Cabibbo suppressed D decays

We devise tests for a new physics origin of the recently measured direct CP violation in singly Cabibbo-suppressed D decays. The tests take the form of sum rules for the CP asymmetries in various D decays. They are based on the fact that within the standard model CP violation arises from interferenc...

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Veröffentlicht in:Physical review. D, Particles, fields, gravitation, and cosmology Particles, fields, gravitation, and cosmology, 2012-06, Vol.85 (11), Article 114036
Hauptverfasser: Grossman, Yuval, Kagan, Alexander L., Zupan, Jure
Format: Artikel
Sprache:eng
Schlagworte:
Amplitudes
Asymmetry
Cosmology
Decay
Gravitation
Origins
Standard model (particle physics)
Sum rules
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Kagan, Alexander L.
Zupan, Jure
description We devise tests for a new physics origin of the recently measured direct CP violation in singly Cabibbo-suppressed D decays. The tests take the form of sum rules for the CP asymmetries in various D decays. They are based on the fact that within the standard model CP violation arises from interference of the dominant tree amplitudes with the Delta I = 1/2 penguin amplitudes. The sum rules would be violated if the observed CP violation is due to new physics contributions to the effective weak Hamiltonian that change the isospin by Delta I = 3/2.
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source American Physical Society Journals
subjects Amplitudes
Asymmetry
Cosmology
Decay
Gravitation
Origins
Standard model (particle physics)
Sum rules
title Testing for new physics in singly Cabibbo suppressed D decays
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