Masses and decay constants of $B_c^{(*)}$ mesons with $N_f=2+1+1$ twisted mass fermions
| Autor: | Damir Becirevic, Giorgio Salerno, Silvano Simula, Aurora Melis, L. Riggio |
|---|---|
| Přispěvatelé: | Laboratoire de Physique Théorique d'Orsay [Orsay] (LPT), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), ETM, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2018 |
| Předmět: |
Quark
Particle physics Meson High Energy Physics::Lattice B/c: decay constant Nuclear Theory FOS: Physical sciences meson 7. Clean energy bottom: mass High Energy Physics - Lattice Pion Lattice constant quark: flavor: 4 Ratio method Lattice (order) quantum chromodynamics continuum limit quark: mass dependence numerical calculations lattice Physics B/c: mass [PHYS.HLAT]Physics [physics]/High Energy Physics - Lattice [hep-lat] High Energy Physics::Phenomenology High Energy Physics - Lattice (hep-lat) Fermion vector meson heavy quark: mass charm: mass Pseudoscalar quark: mass: twist B/c*: mass [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph] B/c*: decay constant Condensed Matter::Strongly Correlated Electrons High Energy Physics::Experiment pseudoscalar meson |
| Zdroj: | PoS 36th International Symposium on Lattice Field Theory 36th International Symposium on Lattice Field Theory, Jul 2018, East Lansing, United States. pp.273, ⟨10.22323/1.334.0273⟩ |
| DOI: | 10.48550/arxiv.1812.00771 |
| Popis: | We present a preliminary lattice determination of the masses and decay constants of the pseudoscalar and vector mesons $B_c$ and $B_c^*$. Our analysis is based on the gauge configurations produced by the European Twisted Mass Collaboration with $N_f = 2 + 1 + 1$ flavors of dynamical quarks. We simulated at three different values of the lattice spacing and with pion masses as small as 210 MeV. Heavy-quark masses are simulated directly on the lattice up to $\sim 3$ times the physical charm mass. The physical b-quark mass is reached using the ETMC ratio method. Our preliminary results are: $M_{B_c} = 6341\,(60)$ MeV, $f_{B_c} = 396\,(12)$ MeV, $M_{B_c^*} / M_{B_c} = 1.0037\,(39)$ and $f_{B_c^*} / f_{B_c} = 0.987\,(7)$. Comment: 7 pages, 3 figures, 1 table; contribution to the proceedings of the XXXVI Int'l Workshop on Lattice Field Theory (LATTICE2018), July 22-28, 2018, East Lansing, Michigan State University (Michigan, USA) |
| Databáze: | OpenAIRE |
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