English
Related papers

Related papers: NRQCD and Static Systems -- A General Variational …

200 papers

We extend the picture of $B$-meson decay constants obtained in lattice QCD beyond those of the $B$, $B_s$ and $B_c$ to give the first full lattice QCD results for the $B^*$, $B^*_s$ and $B^*_c$. We use improved NonRelativistic QCD for the…

High Energy Physics - Lattice · Physics 2015-07-01 B. Colquhoun , C. T. H. Davies , R. J. Dowdall , J. Kettle , J. Koponen , G. P. Lepage , A. T. Lytle

We present the results of a lattice QCD calculation of the average up-down and strange quark masses and of the light meson pseudoscalar decay constants with Nf=2 dynamical fermions. The simulation is carried out at a single value of the…

We present a computation of B-meson decay constants from lattice QCD simulations within the framework of Heavy Quark Effective Theory for the b-quark. The next-to-leading order corrections in the HQET expansion are included…

High Energy Physics - Lattice · Physics 2014-07-17 F. Bernardoni , B. Blossier , J. Bulava , M. Della Morte , P. Fritzsch , N. Garron , A. Gérardin , J. Heitger , G. von Hippel , H. Simma , R. Sommer

We report on our progress in calculating the B-meson decay constants and B^0-bar B^0 mixing parameters using domain-wall light quarks and relativistic b-quarks. We present our computational method and show some preliminary results obtained…

High Energy Physics - Lattice · Physics 2015-03-18 Ruth S. Van de Water , Oliver Witzel

We calculate B-physics quantities using the RBC/UKQCD 2+1 flavor domain-wall plus Iwasaki lattices and the relativistic heavy quark action developed by Christ, Li and Lin. After tuning these parameters nonperturbatively, we present our…

High Energy Physics - Lattice · Physics 2012-11-30 Oliver Witzel

Heavy-light bound states are studied in Lattice QCD with emphasis on parameters of the B-system relevant to experiment. Results are obtained on lattices with lattice spacings from about 0.15 fm to 0.06 fm corresponding to $\beta=5.74, 6.0$…

High Energy Physics - Lattice · Physics 2007-05-23 C. Alexandrou

The spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with J^P = 1/2^+, 3/2^+, 5/2^+, 7/2^+, 1/2^-, and 3/2^- are determined with…

High Energy Physics - Lattice · Physics 2012-06-27 Stefan Meinel

Neutral B meson mixing matrix elements and B meson decay constants are calculated. Static approximation is used for b quark and domain-wall fermion formalism is employed for light quarks. The calculations are done on 2+1 flavor dynamical…

High Energy Physics - Lattice · Physics 2013-12-05 Tomomi Ishikawa , Yasumichi Aoki , Taku Izubuchi , Christoph Lehner , Amarjit Soni

We present results for the static-light meson from unquenched lattice QCD. The unquenched gauge configurations were generated using the non-perturbatively improved clover action. At the fixed lattice spacing of 0.1 fm the lightest sea quark…

High Energy Physics - Lattice · Physics 2008-11-26 UKQCD Collaboration , Craig McNeile , Chris Michael , Gavin Thompson

We present the preliminary result of the calculation of $B_B$ parameter using lattice NRQCD. The calculation is performed on a $16^3 \times 48$ quenched lattice at $\beta=5.9$ with clover light quark. The use of lattice NRQCD enables us to…

High Energy Physics - Lattice · Physics 2011-01-27 N. Yamada , S. Hashimoto , K-I. Ishikawa , H. Matsufuru , T. Onogi , S. Tominaga

We compute the leptonic decay constants of heavy-light vector mesons in the quenched approximation. The reliability of lattice computations for heavy quarks is checked by comparing the ratio of vector to pseudoscalar decay constant with the…

High Energy Physics - Lattice · Physics 2008-11-26 C. Bernard , P. Williams , S. Datta , Steven Gottlieb , C. DeTar , Urs M. Heller , C. McNeile , K. Orginos , R. Sugar , D. Toussaint

The decay rates of $Q \bar Q$ mesons ($Q \varepsilon {c, b}$) are studied in the NRQCD formalism in terms of their short distance and long distance coefficients. The long distance coefficients are obtained through phenomenological potential…

High Energy Physics - Phenomenology · Physics 2008-12-18 Ajay Kumar Rai , Bhavin Patel , P C Vinodkumar

We present a new determination of the B and B_s meson decay constants using NRQCD b-quarks, HISQ light and strange valence quarks and the MILC collaboration N_f=2+1 lattices. The new calculations improve on HPQCD's earlier work with NRQCD…

High Energy Physics - Lattice · Physics 2012-08-27 Heechang Na , Chris J. Monahan , Christine T. H. Davies , Ron Horgan , G. Peter Lepage , Junko Shigemitsu

We employ a nonrelativistic version of QCD (NRQCD) to study heavy quark-antiquark bound states in the lowest approximation without fine structure. We use gluon configurations on a 16^3 by 48 lattice at beta=6.2 from the UKQCD collaboration.…

High Energy Physics - Lattice · Physics 2010-11-01 S. Catterall , F. Devlin , I. Drummond , R. Horgan , A. Simpson

We give a review and present a comprehensive calculation for the leptonic constant B_{c} of the low-lying pseudoscalar and vector states of B_{c}-meson in the framework of static and QCD-motivated nonrelativistic potential models taking…

High Energy Physics - Phenomenology · Physics 2008-11-26 Sameer M. Ikhdair , Ramazan Sever

The results of an extensive study of B-meson properties in quenched lattice QCD are presented. The studies are carried out in the static quark limit where the b-quark is taken to be infinitely massive. Our computations rely on a multistate…

High Energy Physics - Lattice · Physics 2011-02-01 A. Duncan , E. Eichten , J. Flynn , B. Hill , G. Hockney , H. Thacker

We compute the decay constants for the heavy--light pseudoscalar mesons in the quenched approximation and continuum limit of lattice QCD. Within the Schrodinger Functional framework, we make use of the step scaling method, which has been…

High Energy Physics - Lattice · Physics 2015-06-25 G. M. de Divitiis , M. Guagnelli , F. Palombi , R. Petronzio , N. Tantalo

We present preliminary results for the B meson decay constant and masses of low-lying heavy-light mesons in the static limit. Calculations were performed on the lattice in the quenched approximation using multistate smearing functions…

High Energy Physics - Phenomenology · Physics 2010-11-19 Anthony Duncan , Estia Eichten , Aida X. El-Khadra , Jonathan M. Flynn , Brian R. Hill , Hank Thacker

We report results on $f_B$ and semi-leptonic $B$ decay form factors using NRQCD. We investigate $1/M$ scaling behavior of decay amplitudes. For $f_B$ Effect of higher order relativistic correction terms are also studied.

High Energy Physics - Lattice · Physics 2009-10-30 Shoji Hashimoto , Kenichi Ishikawa , Hideo Matsufuru , Tetsuya Onogi , Norikazu Yamada

This talk summarizes the quenched calculation of $f_B$ and $f_{B_s}$ presented in hep-lat/9801038. The heavy quark is simulated using an $O(1/M^2)$ improved NRQCD action, and the tadpole improved clover action is used for the light quarks.…

High Energy Physics - Lattice · Physics 2007-05-23 Tanmoy Bhattacharya