Matching lattice and continuum four-fermion operators with nonrelativistic QCD and highly improved staggered quarks

Autor: Monahan, Christopher, Gamiz, Elvira, Horgan, Ron, Shigemitsu, Junko
Rok vydání: 2014
Předmět:
Zdroj: Phys. Rev. D 90, 054015 (2014)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevD.90.054015
Popis: We match continuum and lattice heavy-light four-fermion operators at one loop in perturbation theory. For the heavy quarks we use nonrelativistic QCD and for the massless light quarks the highly improved staggered quark action. We include the full set of $\Delta B=2$ operators relevant to neutral $B$ mixing both within and beyond the Standard Model and match through order $\alpha_s$, $\Lambda_{\mathrm{QCD}}/M_b$, and $\alpha_s/(aM_b)$.
Comment: 13 pages, 10 figures. Version accepted by Phys. Rev. D: one diagram added (Fig.4) and text updated accordingly. Typographic errors corrected
Databáze: arXiv