Non-perturbative tests of continuum HQET through small-volume two-flavour QCD

التفاصيل البيبلوغرافية
العنوان: Non-perturbative tests of continuum HQET through small-volume two-flavour QCD
المؤلفون: Fritzsch, P., Garron, N., Heitger, J.
سنة النشر: 2015
المجموعة: High Energy Physics - Lattice
High Energy Physics - Phenomenology
مصطلحات موضوعية: High Energy Physics - Lattice, High Energy Physics - Phenomenology
الوصف: We study the heavy quark mass dependence of selected observables constructed from heavy-light meson correlation functions in small-volume two-flavour lattice QCD after taking the continuum limit. The light quark mass is tuned to zero, whereas the range of available heavy quark masses $m_h$ covers a region extending from around the charm to beyond the bottom quark mass scale. This allows entering the asymptotic mass-scaling regime as $1/m_h \to 0$ and performing well-controlled extrapolations to the infinite-mass limit. Our results are then compared to predictions obtained in the static limit of continuum Heavy Quark Effective Theory (HQET), in order to verify non-perturbatively that HQET is an effective theory of QCD. While in general we observe a nice agreement at the few-% level, we find it to be less convincing for the small-volume pseudoscalar decay constant when perturbative matching is involved.
Comment: 42 pages, 10 figures, 12 tables; JHEP style
نوع الوثيقة: Working Paper
DOI: 10.1007/JHEP01(2016)093
URL الوصول: http://arxiv.org/abs/1508.06938
رقم الأكسشن: edsarx.1508.06938
قاعدة البيانات: arXiv