Parity-violating polarization innp→dγwith a pionless effective field theory
نویسندگان
چکیده
منابع مشابه
Rearranging Pionless Effective Field Theory
We point out a redundancy in the operator structure of the pionless effective field theory, EFT(π/), which dramatically simplifies computations. This redundancy is best exploited by using dibaryon fields as fundamental degrees of freedom. In turn, this suggests a new power counting scheme which sums range corrections to all orders. We explore this method with a few simple observables: the deute...
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Weak interactions are expected to induce a parity violating pion-nucleon coupling, h (1) πNN . This coupling should be measurable in a proposed experiment to study the parity violating asymmetry Aγ in the process ~n + p → d + γ. We compute the leading dependence of Aγ on the coupling h (1) πNN using recently developed effective field theory techniques and find an asymmetry of Aγ = +0.17 h (1) π...
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We show that processes involving pions that remain very near their massshell can be reliably computed in the pionless effective field theory, with the pion integrated in as a heavy field. As an application, we compute the πdeuteron scattering amplitude near threshold to next-to-leading order in the momentum expansion. This amplitude is formally dominated by an infrared logarithm of the form log...
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We consider a pionless effective theory with dibaryon fields for the description of the weak process involving two nucleons. We construct leading order Lagrangians that contain nucleon-dibaryon weak coupling constants. We calculate the physical observable in the photodisintegration of the deuteron at threshold and obtain the result in terms of the nucleon-dibaryon weak coupling constants. Relat...
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PARITY VIOLATION IN NEUTRON DEUTERON SCATTERING IN PIONLESS EFFECTIVE FIELD THEORY
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ژورنال
عنوان ژورنال: Physical Review C
سال: 2010
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.81.055501