scholarly journals TESTING FLAVOR SYMMETRIES BY B-FACTORY

2009 ◽  
Vol 24 (31) ◽  
pp. 5831-5844 ◽  
Author(s):  
TAKESHI ARAKI ◽  
JISUKE KUBO
Keyword(s):  
Predictive Models ◽  
Quark Mass ◽  
Strange Quark ◽  
Low Energy ◽  
Quark Masses ◽  
Strange Quark Mass ◽  
Flavor Symmetries ◽  
B Factory ◽  
Discrete Family

The Cabibbo–Kobayashi–Maskawa (CKM) parameters are investigated in detail in recent predictive models which are based on low-energy non-Abelian discrete family symmetries. Some of the models can already be excluded at the present precision of the determination of the CKM parameters, while some of them seem to survive. We find that to make the uncertainties of the theoretical values comparable with the assumed uncertainties of ~1° and ~2° in ϕ2(α) and ϕ3(γ), respectively, at about 50 inverse atto barn achieved at a future B factory, it is necessary to reduce the uncertainties in the quark masses, especially that of the strange quark mass by more than 60%.

scholarly journals Bs → Kℓv form factors with 2+1 flavors

2018 ◽  
Vol 175 ◽  
pp. 13008 ◽  
Author(s):  
Yuzhi Liu ◽  
Jon A. Bailey ◽  
A. Bazavov ◽  
C. Bernard ◽  
C. M. Bouchard ◽  
...  
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Lattice Spacing ◽  
Light Quark ◽  
Form Factors ◽  
Ckm Matrix ◽  
Strange Quark Mass ◽  
Light Quark Mass ◽  
B Quark

Using the MILC 2+1 flavor asqtad quark action ensembles, we are calculating the form factors f0 and f+ for the semileptonic Bs → Kℓv decay. A total of six ensembles with lattice spacing from ≈ 0.12 to 0.06 fm are being used. At the coarsest and finest lattice spacings, the light quark mass m’l is one-tenth the strange quark mass m’s. At the intermediate lattice spacing, the ratio m’l/m’s ranges from 0.05 to 0.2. The valence b quark is treated using the Sheikholeslami-Wohlert Wilson-clover action with the Fermilab interpretation. The other valence quarks use the asqtad action. When combined with (future) measurements from the LHCb and Belle II experiments, these calculations will provide an alternate determination of the CKM matrix element |Vub|.

scholarly journals A determination of the strange quark mass for unquenched clover fermions using the AWI

2005 ◽  
Author(s):  
Roger Horsley ◽  
Meinulf Gockeler ◽  
Alan C. Irving ◽  
Dirk Pleiter ◽  
Paul E.L. Rakow ◽  
...  
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Strange Quark Mass

scholarly journals ON THE QCD SUM RULE DETERMINATION OF THE STRANGE QUARK MASS

2001 ◽  
Vol 16 (supp01b) ◽  
pp. 588-590 ◽  
Author(s):  
NELLO PAVER
Keyword(s):  
Spectral Function ◽  
Quark Mass ◽  
Strange Quark ◽  
Sum Rules ◽  
Sum Rule ◽  
Strange Quark Mass ◽  
Current Quark Mass ◽  
Current Quark

I briefly review recent QCD Sum Rules determinations of the strange current quark mass, based on the analysis of the two-point ΔS=1 scalar correlators and discuss, in particular, the role of resonances and non-resonant background in the spectral function.

scholarly journals Tau-decay determination of the strange quark mass

2000 ◽  
Vol 86 (1-3) ◽  
pp. 236-241 ◽  
Author(s):  
Antonio Pich ◽  
Joaquim Prades
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Strange Quark Mass

LIGHT QUARK MASSES FROM QCD SUM RULES

2013 ◽  
Vol 28 (26) ◽  
pp. 1360016 ◽  
Author(s):  
KARL SCHILCHER
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Sum Rules ◽  
Light Quark ◽  
Finite Energy ◽  
Qcd Sum Rules ◽  
Sum Rule ◽  
Quark Masses ◽  
Strange Quark Mass

Recent QCD sum rule determinations of the light quark masses are reviewed. In the case of the strange quark mass, possible uncertainties are discussed in the framework of finite energy sum rules.

QCD determination of the strange-quark mass

1991 ◽  
Vol 253 (1-2) ◽  
pp. 241-245 ◽  
Author(s):  
C.A. Dominguez ◽  
C. van Gend ◽  
N. Paver
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Strange Quark Mass

scholarly journals On the QCD sum rule determination of the strange quark mass

1997 ◽  
Vol 408 (1-4) ◽  
pp. 340-346 ◽  
Author(s):  
P. Colangelo ◽  
F. De Fazio ◽  
G. Nardulli ◽  
N. Paver
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Sum Rule ◽  
Strange Quark Mass

scholarly journals Determination of the strange-quark mass from QCD pseudoscalar sum rules

1999 ◽  
Vol 74 (1-3) ◽  
pp. 313-316 ◽  
Author(s):  
C.A. Dominguez ◽  
L. Pirovano ◽  
K. Schilcher
Keyword(s):  
Quark Mass ◽  
Strange Quark ◽  
Sum Rules ◽  
Strange Quark Mass

scholarly journals Light- and strange-quark mass dependence of the ρ(770) meson revisited

2020 ◽  
Vol 2020 (11) ◽  
Author(s):  
R. Molina ◽  
J. Ruiz de Elvira
Keyword(s):  
Perturbation Theory ◽  
Chiral Perturbation Theory ◽  
Quark Mass ◽  
Strange Quark ◽  
Global Analysis ◽  
Mass Dependence ◽  
Chiral Perturbation ◽  
Quark Masses ◽  
Strange Quark Mass ◽  
Quark Mass Dependence

Abstract Recent lattice data on ππ-scattering phase shifts in the vector-isovector channel, pseudoscalar meson masses and decay constants for strange-quark masses smaller or equal to the physical value allow us to study the strangeness dependence of these observables for the first time. We perform a global analysis on two kind of lattice trajectories depending on whether the sum of quark masses or the strange-quark mass is kept fixed to the physical point. The quark mass dependence of these observables is extracted from unitarized coupled-channel one-loop Chiral Perturbation Theory. This analysis guides new predictions on the ρ(770) meson properties over trajectories where the strange-quark mass is lighter than the physical mass, as well as on the SU(3) symmetric line. As a result, the light- and strange-quark mass dependence of the ρ(770) meson parameters are discussed and precise values of the Low Energy Constants present in unitarized one-loop Chiral Perturbation Theory are given. Finally, the current discrepancy between two- and three-flavor lattice results for the ρ(770) meson is studied.

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