Δm_D and ΔΓ_D revisted

2011/06/10 by Chuan-Hung Chen, Chen, Chuan-Hung, C. S. Kim +1
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #hep-ex #hep-ph

paper · pdf · doi:10.48550/arxiv.1106.1996

9 pages, 2 figures

arxiv created 2011/06/10 · arxiv updated 2011/06/13

Abstract

The lifetime difference (y_D=ΔΓ_D/2Γ_D) and mass difference (x_D=Δm_D/Γ_D) of neutral D meson have been measured with y_D=(0.80± 0.13)% and x_D=(0.59 ± 0.20)%, respectively. Intriguingly, in contrast with the cases of K and B_q systems, the current data indicate that y_D/x_D ∼ 1 and y_D favors to be larger than x_D. For explaining the experimental indication, we here study the D- D oscillation in the framework of unparticle physics. We demonstrate that \it the peculiar phase appearing in off-shell unparticle propagator could play an important role on x_D and y_D.

Related

• New physics in ΔΓ_d
• Recent Results on CP Lifetime Differences of Neutral D Mesons
• Recent Results on B Meson Oscillations
• Determining the Neutral D Mixing Parameters
• Lifetime and mixing parameters of neutral D mesons and neutral B hadrons in experimental particle physics