scholarly journals Varying the light quark mass: Impact on the nuclear force and big bang nucleosynthesis

2013 ◽  
Vol 87 (8) ◽  
Author(s):  
J. C. Berengut ◽  
E. Epelbaum ◽  
V. V. Flambaum ◽  
C. Hanhart ◽  
U.-G. Meißner ◽  
...  
Keyword(s):  
Quark Mass ◽  
Nuclear Force ◽  
Light Quark ◽  
Big Bang ◽  
Big Bang Nucleosynthesis ◽  
Light Quark Mass

scholarly journals Isospin-1/2 Dπ scattering and the lightest $$ {D}_0^{\ast } $$ resonance from lattice QCD

2021 ◽  
Vol 2021 (7) ◽  
Author(s):  
Luke Gayer ◽  
Nicolas Lang ◽  
Sinéad M. Ryan ◽  
David Tims ◽  
Christopher E. Thomas ◽  
...  
Keyword(s):  
Scattering Amplitudes ◽  
Lattice Qcd ◽  
Quark Mass ◽  
Light Quark ◽  
Energy Levels ◽  
Experimental Result ◽  
Infinite Volume ◽  
Resonance Pole ◽  
Strongly Coupled ◽  
Light Quark Mass

Abstract Isospin-1/2 Dπ scattering amplitudes are computed using lattice QCD, working in a single volume of approximately (3.6 fm)3 and with a light quark mass corresponding to mπ ≈ 239 MeV. The spectrum of the elastic Dπ energy region is computed yielding 20 energy levels. Using the Lüscher finite-volume quantisation condition, these energies are translated into constraints on the infinite-volume scattering amplitudes and hence enable us to map out the energy dependence of elastic Dπ scattering. By analytically continuing a range of scattering amplitudes, a $$ {D}_0^{\ast } $$ D 0 ∗ resonance pole is consistently found strongly coupled to the S-wave Dπ channel, with a mass m ≈ 2200 MeV and a width Γ ≈ 400 MeV. Combined with earlier work investigating the $$ {D}_{s0}^{\ast } $$ D s 0 ∗ , and $$ {D}_0^{\ast } $$ D 0 ∗ with heavier light quarks, similar couplings between each of these scalar states and their relevant meson-meson scattering channels are determined. The mass of the $$ {D}_0^{\ast } $$ D 0 ∗ is consistently found well below that of the $$ {D}_{s0}^{\ast } $$ D s 0 ∗ , in contrast to the currently reported experimental result.

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|.

Light quark mass differences in quantum chromodynamics

1983 ◽  
Vol 212 (3) ◽  
pp. 365-390 ◽  
Author(s):  
S. Narison ◽  
N. Paver ◽  
E. de Rafael ◽  
D. Treleani
Keyword(s):  
Quantum Chromodynamics ◽  
Quark Mass ◽  
Light Quark ◽  
Light Quark Mass

LIGHT QUARK MASS RATIOS (mu:md:ms) FROM MESON AND BARYON MASS SPLITTINGS

2013 ◽  
Vol 28 (25) ◽  
pp. 1360015 ◽  
Author(s):  
PETER MINKOWSKI
Keyword(s):  
Quark Mass ◽  
Sum Rules ◽  
Light Quark ◽  
Nucl Phys ◽  
Qcd Sum Rules ◽  
Baryon Mass ◽  
Mass Ratios ◽  
Light Quark Mass

The basis of the material discussed is our work in collaboration with Arnulfo Zepeda from 1979 [Nucl. Phys. B164, 25 (1980)]. The ingredients and consequences of this work will be presented, and compared with results obtained from QCD sum rules and lattice simulations of QCD in accordance with chiral expansions. An up-to-date conclusion will not be possible in this paper, but some comments towards such goal will be given in a concluding section.

scholarly journals Light quark mass effects in the on-shell renormalization constants

2007 ◽  
Vol 2007 (10) ◽  
pp. 006-006 ◽  
Author(s):  
Stefan Bekavac ◽  
Dirk Seidel ◽  
Mathias Steinhauser ◽  
Andrey Grozin
Keyword(s):  
Quark Mass ◽  
Light Quark ◽  
Mass Effects ◽  
Light Quark Mass ◽  
Renormalization Constants

scholarly journals Quenched chiral log and light quark mass from overlap fermions

2003 ◽  
Vol 119 ◽  
pp. 239-241 ◽  
Author(s):  
Terrence Draper ◽  
Shao-Jing Dong ◽  
Ivan Horvath ◽  
Frank Lee ◽  
Keh-Fei Liu ◽  
...  
Keyword(s):  
Quark Mass ◽  
Light Quark ◽  
Light Quark Mass

Light quark mass differences and charge symmetry breaking in hyperon-nucleon interaction

1980 ◽  
Vol 97 (2) ◽  
pp. 305-309 ◽  
Author(s):  
S.N. Biswas ◽  
R.S. Choudhury ◽  
Ashok Goyal ◽  
J.N. Passi
Keyword(s):  
Symmetry Breaking ◽  
Quark Mass ◽  
Light Quark ◽  
Nucleon Interaction ◽  
Charge Symmetry Breaking ◽  
Charge Symmetry ◽  
Light Quark Mass

scholarly journals Quark-mass variation effect on big bang nucleosynthesis

2012 ◽  
Vol 337 ◽  
pp. 012043
Author(s):  
J C Berengut ◽  
V V Flambaum ◽  
V F Dmitriev
Keyword(s):  
Quark Mass ◽  
Big Bang ◽  
Mass Variation ◽  
Big Bang Nucleosynthesis
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