Nuclear central force in the chiral limit

Donoghue, John F.

doi:10.1103/physrevc.74.024002

Cited by 23 publications

(46 citation statements)

References 76 publications

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“…Ref. [25] found the following result for this electromagnetic-coupling effective charge [19,20] in the understanding of the quark-mass dependence of nuclear binding, Refs. [24,25] could estimate Q k2 i and Q k3 i with some reliability.…”

Section: Dynamical Coupling Constants and Ep Violationsmentioning

confidence: 93%

Theoretical aspects of the equivalence principle

Damour

2012

Class. Quantum Grav.

190

179

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We review several theoretical aspects of the Equivalence Principle (EP). We emphasize the unsatisfactory fact that the EP maintains the absolute character of the coupling constants of physics while General Relativity, and its generalizations (Kaluza-Klein, . . ., String Theory), suggest that all absolute structures should be replaced by dynamical entities. We discuss the EP-violation phenomenology of dilaton-like models, which is likely to be dominated by the linear superposition of two effects: a signal proportional to the nuclear Coulomb energy, related to the variation of the fine-structure constant, and a signal proportional to the surface nuclear binding energy, related to the variation of the light quark masses. We recall the various theoretical arguments (including a recently proposed anthropic argument) suggesting that the EP be violated at a small, but not unmeasurably small level. This motivates the need for improved tests of the EP. These tests are probing new territories in physics that are related to deep, and mysterious, issues in fundamental physics.

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Section: Dynamical Coupling Constants and Ep Violationsmentioning

confidence: 93%

Theoretical aspects of the equivalence principle

Damour

2012

Class. Quantum Grav.

190

179

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“…Such estimations were used in the first analysis of the relation between variation of the constant and the universality of free fall [130,165] but the dependency on the quark mass is still not well understood and we refer to Refs. [119,156,158,207] for some attempts to refine this description. For macroscopic bodies, the mass has also a negative contribution…”

Section: Varying Constants and The Universality Of Free Fallmentioning

confidence: 99%

Varying Constants, Gravitation and Cosmology

Uzan

2011

Living Rev. Relativ.

752

784

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Fundamental constants are a cornerstone of our physical laws. Any constant varying in space and/or time would reflect the existence of an almost massless field that couples to matter. This will induce a violation of the universality of free fall. Thus, it is of utmost importance for our understanding of gravity and of the domain of validity of general relativity to test for their constancy. We detail the relations between the constants, the tests of the local position invariance and of the universality of free fall. We then review the main experimental and observational constraints that have been obtained from atomic clocks, the Oklo phenomenon, solar system observations, meteorite dating, quasar absorption spectra, stellar physics, pulsar timing, the cosmic microwave background and big bang nucleosynthesis. At each step we describe the basics of each system, its dependence with respect to the constants, the known systematic effects and the most recent constraints that have been obtained. We then describe the main theoretical frameworks in which the low-energy constants may actually be varying and we focus on the unification mechanisms and the relations between the variation of different constants. To finish, we discuss the more speculative possibility of understanding their numerical values and the apparent fine-tuning that they confront us with.

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“…On the other hand, this has Anthropic implications which lie far beyond the scope of this review. Incidentally, some of the most recent and advanced analyses of these σ effects have been estimated by means of some form of unitarized ChPT [318] and then implemented in different ways inside the NN potential and Cosmological models, which are also beyond the scope of this review.…”

Section: Mass Ofmentioning

confidence: 99%

From controversy to precision on the sigma meson: A review on the status of the non-ordinary f0(500) resonance

2016

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The existence and properties of the sigma meson have been controversial for almost six decades, despite playing a central role in the spontaneous chiral symmetry of QCD or in the nucleonnucleon attraction. This controversy has also been fed by the strong indications that it is not an ordinary quark-antiquark meson. Here we review both the recent and old experimental data and the model independent dispersive formalisms which have provided precise determinations of its mass and width, finally settling the controversy and leading to its new name: f 0 (500). We then provide a rather conservative average of the most recent and advanced dispersive determinations of its pole position √ s σ = 449 +22−16 −i(275±12). In addition, after comprehensive introductions, we will review within the modern perspective of effective theories and dispersion theory, its relation to chiral symmetry, unitarization techniques, its quark mass dependence, popular models, as well as the recent strong evidence, obtained from the QCD 1/N c expansion or Regge theory, for its non ordinary nature in terms of quarks and gluons.

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Nuclear central force in the chiral limit

Cited by 23 publications

References 76 publications

Theoretical aspects of the equivalence principle

Theoretical aspects of the equivalence principle

Varying Constants, Gravitation and Cosmology

From controversy to precision on the sigma meson: A review on the status of the non-ordinary f0(500) resonance

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