The width difference in the B_s- B_s system: towards NNLO

2019/01/05 by Nierste, Ulrich
#FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph)

paper · doi:10.48550/arxiv.1901.01444

Abstract

The width difference ΔΓ among the two mass eigenstates of the B_s- B_s system is measured with a precision of 7%. The theory prediction has a larger uncertainty which mainly stems from unknown perturbative higher-order QCD corrections. I discuss the subset of next-to-next-to-leading order diagrams proportional to α_s² N_f, where N_f=5 is the number of quark flavours. The results are published in [1].

Related

• NNLO QCD corrections to ΔΓ_s in the B_s-B_s system
• Towards two- and three-loop QCD corrections to the width difference in B_s-B_s mixing
• The width difference in \bbm at order α_s and beyond
• The width difference of B_s mesons
• The Width Difference of B_d Mesons