Coherent Conversion of Very Light Pseudoscalar Bosons

Barshay, Saul; Faissner, H.; Rodenberg, R.; Witt, H. de

doi:10.1103/physrevlett.46.1361

Cited by 23 publications

(19 citation statements)

References 11 publications

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“…(5.18) is the rephasing invariant strong CP phase, when a/f P Q is in its ground state minimum of a/f P Q = 0, the strong CP problem is solved. This model and similar low f P Q scale models are ruled out because of laboratory constraints [378,379,380,381,382], but there are viable extended models where f P Q ≫ 246 GeV (the cosmologically favored value of f P Q is around 10 11 GeV). Because these viable axions have suppressed couplings to quarks ∝ 1/f P Q (see Section 6.7), they are called invisible axions.…”

Section: The Strong Cp Problemmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

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After an introduction recalling the theoretical motivation for low energy (100 GeV to TeV scale) supersymmetry, this review describes the theory and experimental implications of the soft supersymmetry-breaking Lagrangian of the general minimal supersymmetric standard model (MSSM). Extensions to include neutrino masses and nonminimal theories are also discussed. Topics covered include models of supersymmetry breaking, phenomenological constraints from electroweak symmetry breaking, flavor/CP violation, collider searches, and cosmological constraints including dark matter and implications for baryogenesis and inflation.

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Section: The Strong Cp Problemmentioning

confidence: 99%

The soft supersymmetry-breaking Lagrangian: theory and applications

Chung

Everett

Kane³

et al. 2005

Physics Reports

415

339

View full text Add to dashboard Cite

show abstract

“…The above facts point to the possibility that quark-gluon degrees of freedom contribute explicitly to multinucleon correlations [11] and forces [12] in nuclei. These correlations [11] and forces are prominently present already in the basic, tightly-bound He nuclei.…”

mentioning

confidence: 99%

“…The data at these higher energies and at low Q 2 , may be expected to be closer to unity because the kinematic variable (x, Q 2 , E) which appears in the ratio of cross sections (as discussed in the next paragraph), is close to unity, thus removing sensitivity [16] toR A (x, Q 2 ). A possible physical reason for the presence of a form factor which vanishes not only as Q 2 → ∞, but also [12] as Q 2 → 0 (this is the unusual aspect in Eq. (2)), lies in a high degree of coherence associated with the system of exchanged sea partons, and nuclear gluons (which are individually, colored quanta).…”

mentioning

confidence: 99%

“…When one recalls that the maximum nucleon densities encountered in 3 He and 4 He are about two times higher than those in any other nucleus, it is not surprising that if relatively short-range, three-body correlations of quark-gluonic origin exist, there are significant effects observable in these systems, in particular when probed by deep-inelastic lepton scattering. This was the basis for a detailed phenomenological model [11] for a three-nucleon correlation (force [12]) which involved as dynamics the exchange of one quark from each nucleon, under the influence of nuclear gluon interactions [13]. Momentum fraction is lost from charged constituents to the quanta of a nuclear gluonic field.…”

mentioning

confidence: 99%

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Effects of a dynamical role for exchanged quarks and nuclear gluons in nuclei: multinucleon correlations in deep-inelastic lepton scattering

Barshay¹,

Kreyerhoff²

2000

Physics Letters B

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It is shown that new data from the HERMES collaboration, as well as all of the earlier improved data from experiments concerning the EMC effect and shadowing in deep-inelastic scattering of leptons from nuclei, provide strong evidence for an explicit dynamical role played by exchanged quarks and nuclear gluons in the basic, tightly-bound systems of three and four nucleons, also occurs [4,5] in the domain of small x < ∼ 0.06, at low and moderate Q 2 , the negative of the squared four-momentum transfer from the lepton. This effect is usually referred to as "shadowing". An effect of this kind is expected at small x, at and near to Q 2 = 0, as a geometrical effect of the nuclear surface, which diminishes the intensity of vector-meson-like components of the photon through strong interactions with nucleons near to this surface [7]. From the very beginning [2,3] of the experimental measurements, there have been two 1

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“…See [14] F 3 This behavior is also present in the cross section for the inverse Primakoff effect, which involves production of a photon by an incident pseudoscalar boson in a nuclear Coloumb field. See [15] cross section is…”

mentioning

confidence: 99%

Are Neutral Goldstone Bosons Initiating Very Energetic Air Showers and Anomalous Multiple-Core Structure as a Component of Cosmic Rays?

Barshay

Kreyerhoff

2001

Mod. Phys. Lett. A

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We consider two recently accentuated, unusual empirical results concerning cosmic-ray events at high energies. We show that the possibility for a correlated explanation is provided by new dynamics which arises from collisions of a neutral Goldstone boson as a component of the highest-energy cosmic rays.In this paper, we consider the hypothesis that there is a nearly-massless neutral Goldstone boson, b 0 , which is a component of high-energy cosmic rays and which is initiating air showers [1,2,3] at the highest energies and possibly also anomalous multiple-core structure seen in photo-emulsion chamber experiments [4, 5,6,7,8]. We point out and examine the consequences of new dynamics which arises from the assumption that there is an effective interaction originating in a neutral triangle anomaly [9,10] involving b 0 and a neutral vector boson Z ′ (and/or a chirallyrelated neutral axial vector boson). This possibility may be related to the possibility that neutrino mass originates as a consequence of a spontaneously broken chiral symmetry at a low energy scale, F < 0.4 MeV. The strength of the effective interaction is ( g 2 2π 2 F ) with g 2 assumed, for numerical illustration of the idea, to be of the order of 0.1 (i. e. like a strength for Z). Our main purpose is to clearly exhibit the relevance of the hypothesis to providing new dynamics bearing upon two long-standing puzzling aspects of cosmic-ray interactions at the highest energies. 1. The presence of a few "hadron-like" air shower events at primary energies estimated to be about 10 20 eV. [1,2] The data still is limited, but this is an energy above the Greisen-Zatsepin-Kuzmin cut-off [11,12] for arrival of protons from sources at very great (cosmological) distances,The vertex arising from the triangle anomaly leads to higher-order nonrenormalizable divergences, so the model must involve effective interactions that are restrained at some high energy scale. Summing (strong) "bubble" diagrams might restrain contributions to m 2 b i. e. δm 2 b (p 2 ) ∼ (m 2 b − p 2 ) at squared four-momentum p 2 .

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Coherent Conversion of Very Light Pseudoscalar Bosons

Cited by 23 publications

References 11 publications

The soft supersymmetry-breaking Lagrangian: theory and applications

The soft supersymmetry-breaking Lagrangian: theory and applications

Effects of a dynamical role for exchanged quarks and nuclear gluons in nuclei: multinucleon correlations in deep-inelastic lepton scattering

Are Neutral Goldstone Bosons Initiating Very Energetic Air Showers and Anomalous Multiple-Core Structure as a Component of Cosmic Rays?

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