Limits on the mass of the gluon

Ynduráin, Félix

doi:10.1016/0370-2693(94)01677-5

Cited by 27 publications

(21 citation statements)

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“…More recently [54], m 0 has been extracted from the lattice simulation of the gluon propagator in the Landau gauge. These lattice studies suggest that m 0 ∼ 400 − 600 MeV, in agreement with the values favored by a variety of phenomenological estimates [55][56][57][58][59][60][61][62].…”

Section: Effective Charge From the Ghost-gluon Vertexsupporting

confidence: 65%

QCD effective charges from lattice data

Aguilar

Binosi

Papavassiliou

2010

J. High Energ. Phys.

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Abstract:We use recent lattice data on the gluon and ghost propagators, as well as the Kugo-Ojima function, in order to extract the non-perturbative behavior of two particular definitions of the QCD effective charge, one based on the pinch technique construction, and one obtained from the standard ghost-gluon vertex. The construction relies crucially on the definition of two dimensionful quantities, which are invariant under the renormalization group, and are built out of very particular combinations of the aforementioned Green's functions. The main non-perturbative feature of both effective charges, encoded in the infrared finiteness of the gluon propagator and ghost dressing function used in their definition, is the freezing at a common finite (non-vanishing) value, in agreement with a plethora of theoretical and phenomenological expectations. We discuss the sizable discrepancy between the freezing values obtained from the present lattice analysis and the corresponding estimates derived from several phenomenological studies, and attribute its origin to the difference in the gauges employed. A particular toy calculation suggests that the modifications induced to the non-perturbative gluon propagator by the gauge choice may indeed account for the observed deviation of the freezing values.

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Section: Effective Charge From the Ghost-gluon Vertexsupporting

confidence: 65%

QCD effective charges from lattice data

Aguilar

Binosi

Papavassiliou

2010

J. High Energ. Phys.

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“…This value is in accord with the MIT bag model estimate of the masses of free quarks and gluons in Eqs. (11) and (12).…”

Section: High-energy Behavior Of Cross Sections In Qcd With Mg =mentioning

confidence: 96%

Upper limits on a possible gluon mass

Nussinov

Shrock

2010

Phys. Rev. D

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We analyze upper limits on a possible gluon mass, mg. We first discuss various ways to modify quantum chromodynamics to include mg = 0, including a bare mass, a Higgs mechanism, and dynamical breaking of color SU(3)c. From an examination of experimental data, we infer an upper limit mg < O(1) MeV. We discuss subtleties in interpreting gluon mass limits in view of the fact that at scales below ΛQCD, quantum chromodynamics is strongly coupled, perturbation theory is not reliable, and the physics is not accurately described in terms of the Lagrangian degrees of freedom, including gluons. We also point out a fundamental difference in the behavior of quantum chromodynamics with a nonzero gluon mass and a weakly coupled gauge theory with a gauge boson mass.

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“…Some of m g predictions are 1 MeV, 20 MeV, 500 MeV, 370 MeV, etc. [29]- [31]. Since it is clear from different predicted values of m g the actual value of m g is still a mystery but it is clear that mesons have some mass and its contribution to any matter can't be neglected like in the case for the crushed and deformed neutrons under the effect of gravitational pressure inside the neutron star to form quark matter.…”

Section: Ternary Sphere Packing To Sought Out Densitymentioning

confidence: 99%

Calculations for Density of Quark Core Consisting of Mono Flavored Closely Packed Quarks inside Neutron Star

Dar¹,

Singh²,

Swaroop³

2015

IJAA

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The attempt has been taken to calculate the density of stars possessing quark matter core using sphere packing concept of crystallography. The quark matter has been taken as solid in nature as predicted in references 36 and 37, and due to immense gravitational pressure at the core of the star the densest packing of quarks as spheres has been assumed to calculate the packing fraction Φ, thus the density ρ of the matter. Three possible types of pickings-mono-sized sphere packing, binary sphere packing and ternary sphere packing, have been worked out using three possible types of quark matter. It has been concluded that no value about the ρ of quark matter can be calculated using binary and ternary packing conditions and for mono-sized packing condition different flavor quark matters of different values in the density have been calculated using results from the experiments done by HI, ZEUS, L3 and CDF Collaborations about the radius limit of quark. For example, for u quark matter ρ ranges from 4.0587 × 10 48-7.40038 × 10 48 MeV/c 2 cm 3 using results of L3 Collaboration, for s quark matter 15.91794 × 10 48-17.6866 × 10 48 MeV/c 2 cm 3 , etc.

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Limits on the mass of the gluon

Cited by 27 publications

References 0 publications

QCD effective charges from lattice data

QCD effective charges from lattice data

Upper limits on a possible gluon mass

Calculations for Density of Quark Core Consisting of Mono Flavored Closely Packed Quarks inside Neutron Star

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