8 Result(s)
within
Yu-Feng Zhou
Physics
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Article
Open AccessConsistent explanation for the cosmic-ray positron excess in p-wave Breit–Wigner enhanced dark matter annihilation
Dark matter (DM) annihilation in the galactic halo can be enhanced relative to that in the early Universe due to the Breit–Wigner enhancement, if the DM particles annihilate through a narrow resonance. Althoug...
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Article
Improved constraints on dark matter effective interactions from CDEX
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Article
Open AccessStrongly first order phase transition in the singlet fermionic dark matter model after LUX
We investigate an extension of the standard model (SM) with a singlet fermionic dark matter (DM) particle which interacts with the SM sector through a real singlet scalar. The presence of a new scalar provides...
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Article
Enhancement of dark matter relic density from late time dark matter conversions
We demonstrate that if the dark matter (DM) in the Universe contains multiple components, the possible interactions between the DM components may convert the heavier DM components into lighter ones. It is then...
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Article
Mixing-induced CP violating sources for electroweak baryogenesis from a semiclassical approach
The effects of flavor mixing in electroweak baryogenesis is investigated in a generalized semiclassical WKB approach. Through calculating the non-adiabatic corrections to the particle currents, it is shown tha...
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Article
Determining weak phase γ and probing new physics in b→s transitions from B→η(’)K
We present a method of determining the weak phase γ in the Cabibbo–Kobayashi–Maskawa matrix from the decays B→ηK,η’K alone. Given a large ratio between color-suppressed and color-allowed tree diagrams extracte...
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Article
Exploring final state hadron structure and SU(3) flavor symmetry breaking effects in \(D\to PP\) and \(D\to PV\) decays
The non-leptonic two body decays \(D\to PP\) and ...
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Article
Isospin relation and SU(3) breaking effects of strong phases in charmless B decays
Isospin and flavor SU(3) relations in charmless hadronic B decays B→ π π, π K are investigated in detail with paying attention to the SU(3) symmetry breaking effects in both amplitudes and strong phases. In gener...
