The Experts below are selected from a list of 759480 Experts worldwide ranked by ideXlab platform
U. Van Kolck - One of the best experts on this subject based on the ideXlab platform.
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Chiral Nuclear Effective Field Theory
AIP Conference Proceedings, 2007Co-Authors: U. Van KolckAbstract:New results regarding the renormalization of pion exchange and power counting in chiral nuclear Effective Field theory are discussed.
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HALO Effective Field THEORY
International Journal of Modern Physics E, 2005Co-Authors: U. Van KolckAbstract:I discuss Effective Field theories for bound states and narrow resonances near two-body thresholds. I illustrate the method in the case of nucleon-alpha scattering.
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Effective Field Theories of Light Nuclei
Nuclear Physics A, 2005Co-Authors: U. Van KolckAbstract:Effective Field theories have been developed for the description of light, shallow nuclei. I review results for two- and three-nucleon systems, and discuss their extension to halo nuclei.
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Narrow resonances in Effective Field theory
Physics Letters B, 2003Co-Authors: Paulo F. Bedaque, Hans-werner Hammer, U. Van KolckAbstract:We discuss the power counting for Effective Field theories with narrow resonances near a two-body threshold. Close to threshold, the Effective Field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, “kinematic” fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering.
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Narrow resonances in Effective Field theory
Physics Letters B, 2003Co-Authors: Paulo F. Bedaque, Hans-werner Hammer, U. Van KolckAbstract:We discuss the power counting for Effective Field theories with narrow resonances near a two-body threshold. Close to threshold, the Effective Field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, ``kinematic'' fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering.Comment: 11 pages, revtex4, 3 ps figure
David B. Kaplan - One of the best experts on this subject based on the ideXlab platform.
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Effective Field theory for nuclear physics
Nuclear Physics, 2000Co-Authors: David B. KaplanAbstract:I summarize the motivation for the Effective Field theory approach to nuclear physics, and some of its recent accomplishments. 1 Why Effective Field theory, why nuclear physics? Low energy data is generally insensitive to the details of interactions at short distance. It is therefore difficult to learn about short rangeinteractions; yet by the same token, complete knowledge of the physics at short distances is not required for an accurate understanding of experiments. Effective Field theory exploits this fact. The effects of nonlocal interactions at short distance may be represented in terms of local operators in a derivative expansion — the Effective Lagrangian. The higher an operator’s dimension, the smaller the effect it has on low energy physics, and hence one can obtain a useful phenomenological theory by retaining operators only up to some dimension, fitting their coefficients to data. Some Effective theories arequite useful, such as chiral perturbation theory; some are wildly successful, such as the standard model of particle physics. In this talk I will discuss a new application currently being developed, nuclear Effective theory. The utility of Effective Field theory (EFT) depends on the existence of an energy gap so that “short” and “long” distance physics can be distinguished. It is probably not a useful technique for describing turbulence, or protein folding, for example. In 1990, Weinberg suggested that nuclear physics could be a subject that would benefit from an EFT treatment 1 . In nucleon-nucleon interactions, one can identify the low scales to be m� = 140 MeV, and the nucleon momentum (pF ≃ 280 MeV in nuclear matter), while the high scales
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Long and short of nuclear Effective Field theory expansions
Physical Review C, 1999Co-Authors: David B. Kaplan, James V. SteeleAbstract:Nonperturbative Effective Field theory calculations for NN scattering seem to break down at rather low momenta. By examining several toy models, we clarify how Effective Field theory expansions can in general be used to properly separate long- and short-range effects. We find that one-pion exchange has a large effect on the scattering phase shift near poles in the amplitude, but otherwise can be treated perturbatively. Analysis of a toy model that reproduces {sup 1}S{sub 0} NN scattering data rather well suggests that failures of Effective Field theories for momenta above the pion mass can be due to short-range physics rather than the treatment of pion exchange. We discuss the implications this has for extending the applicability of Effective Field theories. (c) 1999 The American Physical Society.
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Effective Field theory for nuclear physics
arXiv: Nuclear Theory, 1999Co-Authors: David B. KaplanAbstract:I summarize the motivation for the Effective Field theory approach to nuclear physics, and highlight some of its recent accomplishments. The results are compared with those computed in potential models.
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More Effective Field theory for non-relativistic scattering
Nuclear Physics B, 1997Co-Authors: David B. KaplanAbstract:An Effective Field theory treatment of nucleon-nucleon scattering at low energy shows much promise and could prove to be a useful tool in the study of nuclear matter at both ordinary and extreme densities. The analysis is complicated by the existence a large length scale - the scattering length — which arises due to couplings in the short distance theory being near critical values. I show how this can be dealt with by introducing an explicit s-channel state in the Effective Field theory. The procedure is worked out analytically in a toy example. I then demonstrate that a simple Effective Field theory excellently reproduces the 1S0 np phase shift up to the pion production threshold.
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Effective Field Theories
arXiv: Nuclear Theory, 1995Co-Authors: David B. KaplanAbstract:Three lectures on Effective Field theory given at the Seventh Summer School in Nuclear Physics, Seattle June 19-30 1995.
M.j. Savage - One of the best experts on this subject based on the ideXlab platform.
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Effective Field theory for nuclear physics
Nuclear Physics, 2003Co-Authors: M.j. SavageAbstract:Abstract I review the current status of the application of Effective Field theory to nuclear physics, and its present implications for nuclear astrophysics.
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Effective Field theory in nuclear physics: 2001
AIP Conference Proceedings, 2002Co-Authors: M.j. SavageAbstract:I review the status of Effective Field theory in nuclear physics. After a brief introduction to QCD, I present the pionless Effective Field theory that describes very low-energy multi-nucleon processes. Recent developments in our understanding of the Effective Field theory appropriate for momenta above the pion mass are discussed. Finally, the role that Effective Field theory will play in connecting lattice calculations with nature is outlined.
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Effective Field theory in nuclear physics
AIP Conference Proceedings, 2000Co-Authors: M.j. SavageAbstract:I review recent developments in the application of Effective Field theory to nuclear physics. Emphasis is placed on precision two-body calculations and efforts to formulate the nuclear shell model in terms of an Effective Field theory.
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The Two-Nucleon Sector with Effective Field Theory
arXiv: Nuclear Theory, 1999Co-Authors: M.j. SavageAbstract:I present the results obtained for several observables in the two-nucleon sector using Effective Field theory with KSW power-counting and dimensional regularization. In addition to the phase shifts for nucleon-nucleon scattering, several deuteron observables are discussed, including electromagnetic form factors, polarizabilities, gamma+d -> gamma+d Compton scattering, and n+p -> d+gamma. A detailed comparison between the Effective Field theory with pions, the theory without pions, and Effective range theory is made.
Savdeep Sethi - One of the best experts on this subject based on the ideXlab platform.
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Global Anomalies and Effective Field Theory
Journal of High Energy Physics, 2016Co-Authors: Siavash Golkar, Savdeep SethiAbstract:We show that matching anomalies under large gauge transformations and large diffeomorphisms can explain the appearance and non-renormalization of couplings in Effective Field theory. We focus on thermal Effective Field theory, where we argue that the appearance of certain unusual Chern-Simons couplings is a consequence of global anomalies. As an example, we show that a mixed global anomaly in four dimensions fixes the chiral vortical effect coefficient (up to an overall additive factor). This is an experimentally measurable prediction from a global anomaly. For certain situations, we propose a simpler method for calculating global anomalies which uses correlation functions rather than eta invariants.
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Global Anomalies and Effective Field Theory
arXiv: High Energy Physics - Theory, 2015Co-Authors: Siavash Golkar, Savdeep SethiAbstract:We show that matching anomalies under large gauge transformations and large diffeomorphisms can explain the appearance and non-renormalization of couplings in Effective Field theory. We focus on thermal Effective Field theory where we argue that the appearance of certain unusual Chern-Simons couplings is a consequence of global anomalies. As an example, we show that a mixed global anomaly in four dimensions fixes the chiral vortical effect coefficient. This is an experimentally measurable prediction from a global anomaly. For certain situations, we propose a simpler method for calculating global anomalies which uses correlation functions rather than eta invariants.
Paulo F. Bedaque - One of the best experts on this subject based on the ideXlab platform.
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Narrow resonances in Effective Field theory
Physics Letters B, 2003Co-Authors: Paulo F. Bedaque, Hans-werner Hammer, U. Van KolckAbstract:We discuss the power counting for Effective Field theories with narrow resonances near a two-body threshold. Close to threshold, the Effective Field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, “kinematic” fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering.
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Narrow resonances in Effective Field theory
Physics Letters B, 2003Co-Authors: Paulo F. Bedaque, Hans-werner Hammer, U. Van KolckAbstract:We discuss the power counting for Effective Field theories with narrow resonances near a two-body threshold. Close to threshold, the Effective Field theory is perturbative and only one combination of coupling constants is fine-tuned. In the vicinity of the resonance, a second, ``kinematic'' fine-tuning requires a nonperturbative resummation. We illustrate our results in the case of nucleon-alpha scattering.Comment: 11 pages, revtex4, 3 ps figure
