Results 81 to 90 of about 4,373,963 (233)

Whence the Effectiveness of Effective Field Theories? [PDF]

The British Journal for the Philosophy of Science, 2020
Effective Quantum Field Theories (EFTs) are effective insofar as they apply within a prescribed range of length-scales, but within that range they predict and describe with extremely high accuracy and precision. The effectiveness of EFTs is explained by identifying the features – the scaling behaviour of the parameters – which lead to effectiveness ...
openaire   +5 more sources

On renormalizability of the effective field theory of massive Yang-Mills fields [PDF]

Modern Physics Letters A, Vol. 27, No. 23, (2012) 1250128, 2011
Effective field theory of massive Yang-Mills fields interacting with fermions is considered. Perturbative renormalizability in the sense of effective field theory is shown. It is argued that the limit of vanishing vector boson mass leads to massless gauge effective field theory. Possible relevance for the solution to the strong CP problem is discussed.
arxiv   +1 more source

Narrow Resonances in Effective Field Theory

, 2003
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.
Arndt, Battat, Beane, Bedaque, Bertulani, H.-W. Hammer, Haesner, Kaplan, P.F. Bedaque, Pascalutsa, Tanaka, Tilley, U. van Kolck, van Kolck, van Kolck   +14 more
core   +1 more source

Entanglement, Renormalization and Effective Field Theories [PDF]

arXiv, 2020
We develop the idea that renormalization, decoupling of heavy particle effects from low energy physics and the construction of effective field theories are intimately linked to the momentum space entanglement of disparate modes of an interacting quantum field theory.
arxiv  

Convergence of chiral effective field theory

, 2002
We formulate the expansion for the mass of the nucleon as a function of pion mass within chiral perturbation theory using a number of different ultra-violet regularisation schemes; including dimensional regularisation and various finite-ranged regulators.
A.W. Thomas, Banerjee, Becher, Bernard, Borasoy, Cloet, CP-PACS, D.B. Leinweber, Detmold, Detmold, Detmold, Donoghue, Edwards, Gasser, Gell-Mann, Guo, Hackett-Jones, Hackett-Jones, Iwasaki, Lebed, Leinweber, Leinweber, Leinweber, Leinweber, Leinweber, Leinweber, Leinweber, Leinweber, Li, McGovern, R.D. Young, Sommer, UKQCD, Wright, Wright, Young, Young   +36 more
core   +1 more source

Global anomalies and effective field theory [PDF]

Journal of High Energy Physics, 2016
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,
Siavash Golkar, Savdeep Sethi
openaire   +3 more sources

Abelian and nonabelian vector field effective actions from string field theory [PDF]

JHEP 0309 (2003) 050, 2003
The leading terms in the tree-level effective action for the massless fields of the bosonic open string are calculated by integrating out all massive fields in Witten's cubic string field theory. In both the abelian and nonabelian theories, field redefinitions make it possible to express the effective action in terms of the conventional field strength.
arxiv   +1 more source

Effective Field Theory for Long Strings

, 2013
In previous work we used magnetic SU(N) gauge theory with adjoint representation Higgs scalars to describe the long distance quark-antiquark interaction in pure Yang-Mills theory, and later to obtain an effective string theory. The empirically determined
Baker, M.
core   +1 more source

Soft scalars in effective field theory

Journal of High Energy Physics
We derive a soft theorem for a massless scalar in an effective field theory with generic field content using the geometry of field space. This result extends the geometric soft theorem for scalar effective field theories by allowing the massless scalar ...
Maria Derda, Andreas Helset, Julio Parra-Martinez   +2 more
doaj   +1 more source

Effective Field Theories [PDF]

, 1996
These lectures introduce some of the basic ideas of effective field theories. The topics discussed include: relevant and irrelevant operators and scaling, renormalization in effective field theories, decoupling of heavy particles, power counting, and naive dimensional analysis.
arxiv   +1 more source