LHCb $\bigtriangleup A_{CP}$ of $D$ meson and R-Parity Violation

Details LHCb $\bigtriangleup A_{CP}$ of $D$ meson and R-Parity Violation LHCb $\bigtriangleup A_{CP}$ of $D$ meson and R-Parity Violation

2012-01-12

arxiv.org/abs/1201.2565v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 2 figures

Scientific paper

LHCb collaboration has recently announced a measurement of the difference of time-integrated CP asymmetries between $D\rightarrow K^+K^-$ and $D \rightarrow \pi^+\pi^-$. This result provides the evidence of large direct CP violation in $D$ meson and reveals some important implications on underlying new physics. It is shown that the direct CP violation in $D$ meson can be enhanced by R-parity violating supersymmetry, while CP violations in $K$ and $B$ mesons are suppressed by this new physics, which is in consistence with previous experiments. Constraints on the model parameters and some consequences are also discussed.

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