Unparticle effects on B→ D^(*)τν

2017/11/08 by Lee, Jong-Phil
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1711.02908

Abstract

We examine the possible unparticle effects on R(D^(*)) associated with B→ D^(*)τν decays by minimum-χ² fitting. Recent measurements from Belle and LHCb are included in this analysis. While it is true that the new experimental results of R(D^(*)) get closer to the standard model predictions, there are still rooms for new physics and unparticles are also one possibility. Our best-fit values are R(D)=0.456 and R(D^*)=0.270, which are still far from the standard model values by more than (R(D)) or almost (R(D^*)) 2σ. We also find that the unparticle effects are quite safe to render the branching ratio \rm Br(B_c→τν) less than 10%.

Related

• B anomalies with unparticles
• New physics effects on B→ D^(*)τν decays
• Testing the Standard Model in B → D τ ν decay with minimal theory input
• Recent B → D^(*) τ^- ν_τ Studies at Belle
• Measurement of R(D^*) with Three-Prong τ Decays at LHCb