Neutral meson oscillations in the Standard Model and beyond from Nf=2 Twisted Mass Lattice QCD

2012/11/02 by N. Carrasco, Carrasco, N., P. Dimopoulos +25 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1211.0565

openalex publication_date 2012/11/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present the ETMC results for the bag parameters describing the neutral kaon mixing in the Standard Model and beyond and preliminary results for the bag parameters controlling the short distance contributions in the D⁰-D⁰ oscillations. We also present preliminary results for the B_Bd, B_Bs, B_Bs/B_Bd and ξ-parameter controlling B⁰_-B⁰ oscillations in the Standard Model employing the so-called ratio method. Using Nf=2 maximally twisted sea quarks and Osterwalder-Seiler valence quarks we achieve both O(a)-improvement and continuum like renormalization pattern. Simulations are performed at three-values of the lattice spacing and several values of quark masses in the light, strange, charm region and above charm up to ~2.5m_c. Our results are extrapolated to the continuum limit and extrapolated/interpolated to the physical quark masses.

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• Semileptonic B → D^** decays in Lattice QCD : a feasibility study and first results

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