36th Annual International Symposium on Lattice Field Theory

Jul 22 – 28, 2018
Kellogg Hotel and Conference Center
EST timezone

Masses and decay constants of $B_c^{(*)}$ mesons with $N_f =2+1+1$ twisted mass fermions

Jul 26, 2018, 9:50 AM
20m
103 (Kellogg Hotel and Conference Center)

103

Kellogg Hotel and Conference Center

219 S Harrison Rd, East Lansing, MI 48824
Weak Decays and Matrix Elements

Speaker

Dr Giorgio Salerno (University of Roma Tre & LPT Orsay)

Description

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 interpolation to the physical b-quark mass is performed using the ETMC ratio method: the bottom quark point is reached using ratios of physical quantities computed at nearby quark masses exploiting the fact that these ratios are exactly known in the static quark mass limit.

Primary author

Dr Giorgio Salerno (University of Roma Tre & LPT Orsay)

Co-authors

Mrs Aurora Melis (IFIC & University of Valencia) Dr Cecilia Tarantino (University of Roma Tre) Prof. Damir Becirevic (Université Paris Saclay & CNRS) Dr Lorenzo Riggio (INFN Sez. di Roma Tre) Prof. Silvano Simula (INFN Sez. Roma Tre) Prof. Vittorio Lubicz (University of Roma Tre)

 Slides