X(3872) AND ITS PARTNERS IN HEAVY QUARK QCD

2014 ◽  
Vol 26 ◽  
pp. 1460110 ◽  
Author(s):  
C. HIDALGO ◽  
J. NIEVES ◽  
A. OZPINECI ◽  
V. S. ZAMIRALOV
Keyword(s):  
Correlation Function ◽  
Heavy Quark ◽  
Quark Mass ◽  
Degrees Of Freedom ◽  
Charm Quark ◽  
Final States ◽  
Mass Limit ◽  
Isospin Violation ◽  
Charm Quark Mass ◽  
Small X

The properties of X(3872) are analyzed starting from a correlation function written in terms of the quark and gluon degrees of freedom. It is shown that in the infinite charm quark mass limit, X(3872) meson should have three other degenerate meson partners. The possible isospin structure of X(3872) is also analyzed and it is concluded that although the observed isospin violation in the decays of X(3872) into the final states J/ψρ and J/ψω is small, X(3872) can contain a sizable I = 1 component.

A NUMERICAL STUDY OF IMPROVED WILSON QUARK ACTIONS ON ANISOTROPIC LATTICES

2007 ◽  
Vol 22 (07n10) ◽  
pp. 515-528
Author(s):  
LIUMING LIU ◽  
SHIQUAN SU ◽  
XIN LI ◽  
CHUAN LIU
Keyword(s):  
Quark Mass ◽  
Numerical Study ◽  
Charm Quark ◽  
Gauge Coupling ◽  
Speed Of Light ◽  
Lattice Action ◽  
Charm Quark Mass ◽  
Anisotropic Lattices ◽  
Optimal Value ◽  
Pseudo Scalar

Tadpole improved Wilson quark actions with clover terms on anisotropic lattices are studied numerically. Using asymmetric lattice volumes, the pseudo-scalar meson dispersion relations are measured for 8 lowest lattice momentum modes with quark mass values ranging from the strange to the charm quark with various values of the gauge coupling β and 3 different values of the bare speed of light parameter ν. These results can be utilized to extrapolate or interpolate to obtain the optimal value for the bare speed of light parameter νopt(m) at a given gauge coupling for all bare quark mass values m. In particular, the optimal values of ν at the physical strange and charm quark mass are given for various gauge couplings. The lattice action with these optimized parameters can then be used to study physical properties of hadrons involving either light or heavy quarks.

scholarly journals Effect of the charm quark mass on the BFKL total cross section at LEP

2000 ◽  
Vol 492 (1-2) ◽  
pp. 56-62 ◽  
Author(s):  
Jochen Bartels ◽  
Carlo Ewerz ◽  
René Staritzbichler
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Quark Mass ◽  
Charm Quark ◽  
Charm Quark Mass

scholarly journals Heavy Domain Wall Fermions: The RBC and UKQCD charm physics program

2018 ◽  
Vol 175 ◽  
pp. 13013
Author(s):  
Peter A Boyle ◽  
Luigi Del Debbio ◽  
Andreas Jüttner ◽  
Ava Khamseh ◽  
Justus Tobias Tsang ◽  
...  
Keyword(s):  
Domain Wall ◽  
Quark Mass ◽  
Pion Mass ◽  
Charm Quark ◽  
Charm Physics ◽  
Decay Constants ◽  
Domain Wall Fermions ◽  
Charm Quark Mass ◽  
Physics Program ◽  
Set Up

We review the domain wall charm physics program of the RBC and UKQCD collaborations based on simulations including ensembles with physical pion mass. We summarise our current set-up and present a status update on the decay constants fD, fDs, the charm quark mass, heavy-light and heavy-strange bag parameters and the ratio ξ

scholarly journals A NUMERICAL STUDY OF IMPROVED QUARK ACTIONS ON ANISOTROPIC LATTICES

2006 ◽  
Vol 21 (05) ◽  
pp. 1015-1032 ◽  
Author(s):  
SHIQUAN SU ◽  
LIUMING LIU ◽  
XIN LI ◽  
CHUAN LIU
Keyword(s):  
Quark Mass ◽  
Numerical Study ◽  
Charm Quark ◽  
Gauge Coupling ◽  
Speed Of Light ◽  
Lattice Action ◽  
Charm Quark Mass ◽  
Anisotropic Lattices ◽  
Optimal Value ◽  
Optimal Values

Tadpole improved Wilson quark actions with clover terms on anisotropic lattices are studied numerically. Using asymmetric lattice volumes, the pseudoscalar meson dispersion relations are measured for eight lowest lattice momentum modes with quark mass values ranging from the strange to the charm quark with various values of the gauge coupling β and three different values of the bare speed of light parameter ν. These results can be utilized to extrapolate or interpolate to obtain the optimal value for the bare speed of light parameter ν opt (m) at a given gauge coupling for all bare quark mass values m. In particular, the optimal values of ν at the physical strange and charm quark mass are given for various gauge couplings. The lattice action with these optimized parameters can then be used to study physical properties of hadrons involving either light or heavy quarks.

scholarly journals Charm quark mass dependence of QCD corrections to nonleptonic inclusive B decays

1994 ◽  
Vol 432 (1-2) ◽  
pp. 3-38 ◽  
Author(s):  
E. Bagan ◽  
Patricia Ball ◽  
V.M. Braun ◽  
P. Gosdzinsky
Keyword(s):  
Quark Mass ◽  
Charm Quark ◽  
Mass Dependence ◽  
B Decays ◽  
Charm Quark Mass ◽  
Inclusive B Decays ◽  
Quark Mass Dependence

scholarly journals Running of the charm-quark mass from HERA deep-inelastic scattering data

2017 ◽  
Vol 775 ◽  
pp. 233-238 ◽  
Author(s):  
A. Gizhko ◽  
A. Geiser ◽  
S. Moch ◽  
I. Abt ◽  
O. Behnke ◽  
...  
Keyword(s):  
Inelastic Scattering ◽  
Deep Inelastic Scattering ◽  
Quark Mass ◽  
Charm Quark ◽  
Scattering Data ◽  
Charm Quark Mass ◽  
Deep Inelastic Scattering Data

HYPERFINE MIXING IN b → c SEMILEPTONIC AND ELECTROMAGNETIC DECAYS OF DOUBLY HEAVY bc BARYONS

2014 ◽  
Vol 26 ◽  
pp. 1460107
Author(s):  
C. ALBERTUS ◽  
E. HERNÁNDEZ ◽  
J. NIEVES
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Semileptonic Decay ◽  
Spin Symmetry ◽  
Mass Limit ◽  
Electromagnetic Decays ◽  
Heavy Quark Mass ◽  
Quark Spin ◽  
Heavy Quark Spin Symmetry ◽  
Symmetry Relations

We show that semileptonic and electromagnetic decays involving spin-1/2 doubly heavy bc baryons are very sensitive to hyperfine mixing in their wave functions. We further show how heavy quark spin symmetry relations, obtained in the infinite heavy quark mass limit and near zero recoil, could be used to extract the admixtures in a model independent way from semileptonic decay data. On the other hand the infinite heavy quark mass limit gives wrong predictions in the electromagnetic case.

scholarly journals Charm quark mass

2002 ◽  
Vol 524 (1-2) ◽  
pp. 115-122 ◽  
Author(s):  
D. Bećirević ◽  
V. Lubicz ◽  
G. Martinelli
Keyword(s):  
Quark Mass ◽  
Charm Quark ◽  
Charm Quark Mass

scholarly journals Charm-quark mass effects in NRQCD matching coefficients and the leptonic decay of the ϒ(1S) meson

2021 ◽  
Vol 104 (5) ◽  
Author(s):  
Manuel Egner ◽  
Matteo Fael ◽  
Jan Piclum ◽  
Kay Schönwald ◽  
Matthias Steinhauser
Keyword(s):  
Quark Mass ◽  
Charm Quark ◽  
Leptonic Decay ◽  
Mass Effects ◽  
Charm Quark Mass

scholarly journals Decoupling of charm beyond leading order

2018 ◽  
Vol 175 ◽  
pp. 10001 ◽  
Author(s):  
Francesco Knechtli ◽  
Tomasz Korzec ◽  
Björn Leder ◽  
Graham Moir
Keyword(s):  
Quark Mass ◽  
Charm Quark ◽  
Direct Access ◽  
Effective Theory ◽  
Leading Order ◽  
Charm Quarks ◽  
Charm Quark Mass ◽  
Power Corrections ◽  
Low Energies ◽  
Pure Gauge Theory

We study the effective theory of decoupling of a charm quark at low energies. We do this by simulating a model, QCD with two mass-degenerate charm quarks. At leading order the effective theory is a pure gauge theory. By computing ratios of hadronic scales we have direct access to the power corrections in the effective theory. We show that these corrections follow the expected leading behavior, which is quadratic in the inverse charm quark mass.

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