Nucleon Polarizabilities and Compton Scattering as Playground for Chiral Perturbation Theory

Hagelstein, Franziska

doi:10.3390/sym12091407

Cited by 11 publications

(7 citation statements)

References 128 publications

(282 reference statements)

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“…Low‐energy Compton scattering off the proton p

(\gamma ,\gamma ^{\prime })

p and light nuclei (namely, deuteron or helium), is traditionally used to measure the nucleon polarizabilities, see the recent reviews. [ 257–260 ] The present status of the dipole electric (

\alpha _{E1}

) and magnetic (

\beta _{M1}

) polarizabilities of the proton and neutron is shown in Figure 14 . The GF could improve upon the latest measurements at the operating photon‐beam facilities (HIγS and MAMI) given its broader energy range, high energy resolution, and photon flux.…”

Section: Nuclear Physics With Gf Secondary‐photon Beam On Fixed Targetsmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

et al. 2022

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“…Low‐energy Compton scattering off the proton p

(\gamma ,\gamma ^{\prime })

p and light nuclei (namely, deuteron or helium), is traditionally used to measure the nucleon polarizabilities, see the recent reviews. [ 257–260 ] The present status of the dipole electric (

\alpha _{E1}

) and magnetic (

\beta _{M1}

Section: Nuclear Physics With Gf Secondary‐photon Beam On Fixed Targetsmentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

et al. 2022

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“…Low-energy Compton scattering off the proton p(γ, γ )p and light nuclei (viz. deuteron or helium), is traditionally used to measure the nucleon polarizabilities, see the recent reviews [253][254][255][256]. The present status of the dipole electric (α E1 ) and magnetic (β M 1 ) polarizabilities of the proton and neutron is shown in Fig.…”

Section: Photoinduced Processes On the Proton And Light Nucleimentioning

confidence: 99%

Expanding Nuclear Physics Horizons with the Gamma Factory

Budker,

Berengut,

Flambaum

et al. 2021

Preprint

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The Gamma Factory (GF) is an ambitious proposal, currently explored within the CERN Physics Beyond Colliders program, for a source of photons with energies up to ≈ 400 MeV and photon fluxes (up to ≈ 10 17 photons per second) exceeding those of the currently available gamma sources by orders of magnitude. The high-energy (secondary) photons are produced via resonant scattering of the primary laser photons by highly relativistic partially-stripped ions circulating in the accelerator. The secondary photons are emitted in a narrow cone and the energy of the beam can be monochromatized, eventually down to the ≈ 1 ppm level, via collimation, at the expense of the photon flux. This paper surveys the new opportunities that may be afforded by the GF in nuclear physics and related fields. CONTENTS 11.2. Photon Splitting 48 11.3. Photon Scattering 48 12. Nuclear physics with tertiary beams 49 12.1. Tertiary beams at the GF 49 12.2. Polarized electron, positron and muon sources 49 12.3. High-purity neutrino beams 50 12.4. Neutron and radioactive ion sources 50 12.5. Production of monoenergetic fast neutrons 51 12.6. Metrology with keV neutrons 51 13. Nuclear physics opportunities at the SPS 51 14. Speculative ideas and open questions 51 14.1. Applying the Gamma Factory ideas at other facilities 51 14.2. Nuclear waste transmutation 52 14.3. Laser polarization of PSI 52 14.4. Quark-gluon plasma with polarized PSI 52 14.5. Ground-state hyperfine-structure transitions in PSI 52 14.6. Detection of gravitational waves 53 15. Conclusions and optimistic outlook 53 Acknowledgments 53 Appendix 54 A. Survey of existing and forthcoming gamma facilities 54

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“…Experimentally, polarizabilities are primarily studied by low-energy Compton scattering. Theoretically, a variety of methods have been employed to describe the physics involved, from dispersion relations [39][40][41][42], to chiral perturbation theory (ChPT) [43][44][45] or chiral effective field theory (EFT) [46,47]. Reviews on hadron polarizabilities can be found in Refs.…”

Section: Introductionmentioning

confidence: 99%

Charged pion electric polarizability from four-point functions in lattice QCD

Lee¹,

Alexandru²,

Culver³

et al. 2023

Preprint

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Polarizabilities reveal valuable information on the internal structure of hadrons in terms of charge and current distributions. For neutral hadrons, the standard approach is the background field method. But for a charged hadron, its acceleration under the the applied field complicates the isolation of the polarization energy. In this work, we explore an alternative method based on four-point functions in lattice QCD. The approach offers a transparent picture on how polarizabilities arise from quark and gluon interactions. We carry out a proof-of-concept simulation on the electric polarizability of a charged pion, using quenched Wilson action on a 24 3 × 48 lattice at β = 6.0 with pion mass from 1100 to 370 MeV. We show in detail the evaluation and analysis of the four-point correlation functions and report results on charge radius and electric polarizability. Our results from connected diagrams suggest that charged pion αE is due to a large cancellation between elastic and inelastic contributions, leaving a small and positive value that has a relatively mild pion mass dependence.

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Nucleon Polarizabilities and Compton Scattering as Playground for Chiral Perturbation Theory

Cited by 11 publications

References 128 publications

Expanding Nuclear Physics Horizons with the Gamma Factory

Expanding Nuclear Physics Horizons with the Gamma Factory

Expanding Nuclear Physics Horizons with the Gamma Factory

Charged pion electric polarizability from four-point functions in lattice QCD

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