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Academic literature on the topic 'Exact Results in susy QFT'

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Published: 9 March 2023
Last updated: 10 March 2023

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Journal articles on the topic "Exact Results in susy QFT"

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Evans, Nick, Stephen D. H. Hsu, Myckola Schwetz, and Stephen B. Selipsky. "Exact results in softly broken SUSY theories." Nuclear Physics B - Proceedings Supplements 52, no. 1-2 (January 1997): 223–25. http://dx.doi.org/10.1016/s0920-5632(96)00567-1.

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Solomon, Dan. "Some differences between Dirac's hole theory and quantum field theory." Canadian Journal of Physics 83, no. 3 (March 1, 2005): 257–71. http://dx.doi.org/10.1139/p04-086.

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Dirac's hole theory (HT) and quantum field theory (QFT) are generally considered equivalent. However, it was recently shown by several investigators that this is not necessarily the case because when the change in the vacuum energy was calculated for a time-independent perturbation, HT and QFT yielded different results. In this paper, we extend this discussion to include a time-dependent perturbation for which the exact solution to the Dirac equation is known. We show that for this case also, HT and QFT yield different results. In addition, we offer some discussion of the problem of anomalies in QFT. PACS Nos.: 03.65–w, 11.10–z
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SEIBERG, N. "THE POWER OF DUALITY — EXACT RESULTS IN 4D SUSY FIELD THEORY." International Journal of Modern Physics A 16, no. 27 (October 30, 2001): 4365–76. http://dx.doi.org/10.1142/s0217751x01005705.

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Recently the vacuum structure of a large class of four-dimensional (supersymmetric) quantum field theories was determined exactly. These theories exhibit a wide range of interesting new physical phenomena. One of the main new insights is the role of "electric–magnetic duality." In its simplest form it describes the long distance behavior of some strongly coupled, and hence complicated, "electric theories" in terms of weakly coupled "magnetic theories." This understanding sheds new light on confinement and the Higgs mechanism and uncovers new phases of four-dimensional gauge theories. We review these developments and speculate on the outlook.
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Finnell, D., and P. Pouliot. "Instanton calculations versus exact results in four dimensional SUSY gauge theories." Nuclear Physics B 453, no. 1-2 (October 1995): 225–39. http://dx.doi.org/10.1016/0550-3213(95)00318-m.

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Seiberg, N. "The Power of Duality — Exact Results in 4D SUSY Field Theory." International Journal of Modern Physics A 12, no. 29 (November 20, 1997): 5171–82. http://dx.doi.org/10.1142/s0217751x97002772.

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Recently the vacuum structure of a large class of four-dimensional (supersymmetric) quantum field theories was determined exactly. These theories exhibit a wide range of interesting new physical phenomena. One of the main new insights is the role of "electric–magnetic duality." In its simplest form it describes the long distance behavior of some strongly coupled, and hence complicated, "electric theories" in terms of weakly coupled "magnetic theories." This understanding sheds new light on confinement and the Higgs mechanism and uncovers new phases of four-dimensional gauge theories. We review these developments and speculate on the outlook.
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Rousset, Stella, Emmanuel Treiner, Guillaume Moulis, Grégory Pugnet, Léonardo Astudillo, Kim Paricaud, Bénédicte Puissant-Lubrano, Philippe Arlet, Antoine Blancher, and Laurent Sailler. "High rate of indeterminate results of the QuantiFERON-TB Gold in-tube test, third generation, in patients with systemic vasculitis." Rheumatology 59, no. 5 (September 13, 2019): 1006–10. http://dx.doi.org/10.1093/rheumatology/kez390.

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Abstract Objectives To describe the frequency of QuantiFERON-TB Gold in-tube test® (QFT-GIT) indeterminate results due to no response to phytohaemagglutinin A stimulation in the control tube in vasculitis patients prior to immunosuppressant therapy; and to compare it with other groups of patients. Methods This was a single-centre, retrospective study. Patients and controls were included between 1 January 2008 and 31 December 2015. We assessed the rate of indeterminate results of the QFT-GIT in 38 patients with systemic vasculitis prior to any corticosteroid or immunosuppressant therapy, compared with 40 non-vasculitis patients with biological inflammatory syndrome, and 310 non-immunosuppressed patients matched for gender and age. Results Indeterminate results due to no response to phytohaemagglutinin A were more frequent in vasculitis patients (21.1%) compared with non-vasculitis patients with biological inflammatory syndrome (7.5%) (Fisher's exact test: P = 0.11) and to anonymized controls (7%) (P = 0.009). Responses to phytohaemagglutinin A were significantly lower in vasculitis patients compared with other groups (Kruskal–Wallis test: P < 0.0001) and compared with non-vasculitis patients with biological inflammatory syndrome (P = 0.0015). The multivariable analysis identified as independent predictors of an indeterminate result of the QFT-GIT: the presence of systemic vasculitis (odds ratio 9.64 [1.14–81.3], P = 0.037) and a high neutrophil-to-lymphocyte ratio (odds ratio 1.70 [1.21–2.37], P = 0.002). One patient with an indeterminate result of QFT-GIT developed active tuberculosis after one year of corticosteroid therapy for giant cell arteritis. Conclusion Our results question the reliability of QFT-GIT to rule out latent tuberculosis in vasculitis patients at diagnosis, prior to immunosuppressant therapy.
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Cho, Peter. "Exact results in SO(11) SUSY gauge theories with spinor and vector matter." Physics Letters B 400, no. 1-2 (May 1997): 101–8. http://dx.doi.org/10.1016/s0370-2693(97)00315-8.

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Seiberg, Nathan. "Exact results on the space of vacua of four-dimensional SUSY gauge theories." Physical Review D 49, no. 12 (June 15, 1994): 6857–63. http://dx.doi.org/10.1103/physrevd.49.6857.

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Darewych, J. W. "Some exact solutions of reduced scalar Yukawa theory." Canadian Journal of Physics 76, no. 7 (June 3, 1998): 523–37. http://dx.doi.org/10.1139/p98-036.

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The scalar Yukawa model, in which a complex scalar field, ϕ, interacts via a real scalar field, χ, is reduced by using covariant Green functions. It is shown that exact few-particle eigenstates of the truncated QFT Hamiltonian can be obtained in the Feshbach–Villars formulation if an unorthodox "empty" vacuum state is used. Analytic solutions for the two-body case are obtained for massless chion exchange in 3+1 dimensions and for massive chion exchange in 1+1 dimensions. Comparison is made to ladder Bethe–Salpeter, Feynman–Schwinger, and quasipotential results for massive chion exchange in 3+1. Equations for the three-body case are also obtained. PACS Nos.: 11.10.Ef, 11.10.Qr, and 03.70.+k
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Marshakov, A. "Lecture on SUSY Gauge Theories and Integrable Systems." International Journal of Modern Physics B 11, no. 26n27 (October 30, 1997): 3093–124. http://dx.doi.org/10.1142/s0217979297001519.

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I consider main features of the formulation of the finite-gap solutions to integrable equations in terms of complex curves and generating 1-differential. The example of periodic Toda chain solutions is considered in detail. Recently found exact nonperturbative solutions to [Formula: see text] SUSY gauge theories are formulated using the methods of the theory of integrable systems and where possible the parallels between standard quantum field theory results and solutions to the integrable systems are discussed.
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Dissertations / Theses on the topic "Exact Results in susy QFT"

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KLARE, CLAUDIUS. "Supersymmetry on curved spaces and holography." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2014. http://hdl.handle.net/10281/51353.

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This thesis deals with superconformal and supersymmetric field theories on curved spaces with a view toward applications to holography and localisation. It contains two fairly different parts. In the first (and main) part we classify Euclidean and Lorentzian four-manifolds with some preserved N=1,2 supersymmetry, and Euclidean three-manifolds with some preserved N=2 supersymmetry. We take a holographic approach, starting with manifolds that preserve superconformal symmetries. Preserved supersymmetry for asymptotically locally AdS solutions implies the existence of a certain (generalised) ``conformal Killing spinor'' on the boundary. In the non-conformal case a closely related spinor exists, which also will be discussed. In this thesis we classify the manifolds in three and four dimensions that admit such spinors. In particular we find for the case with four supercharges that supersymmetry can be preserved in four dimensions on every Euclidean complex manifold and on any Lorentzian space-time with a null conformal Killing vector. In three Euclidean dimensions we find a condition very similar to complexity in four dimensions. When the field theory has eight supercharges, supersymmetry can generically be preserved on manifolds with time-like conformal Killing vectors; there are singular cases depending on the signature, in the Lorentzian there is a degenerate case reducing to the N=1 analysis, in the Euclidean there is a degenerate case corresponding to the topological twist. The supersymmetric curvature couplings are systematically understood in the rigid limit of supergravity. We give explicit formulae for the background fields that one needs to turn on in order to preserve some supersymmetry. Putting supersymmetric field theories on curved manifolds has led to interesting results over the past years. In the second part of the thesis we analyse a matrix model for the partition function of three dimensional field theories on S^3, which was obtained by supersymmetric localisation. In the large N limit one can evaluate the matrix model, allowing us to perform a non-classical and non-perturbative check of the AdS_4/CFT_3 correspondence and Seiberg duality. In particular, we compute the large-N free energy of various three dimensional quiver gauge theories with arbitrary R-charges, which are dual to M-theory on Sasaki-Einstein seven-manifolds. In particular, we check that the free energy functional depending on the R-charges is minimised for the exact R-symmetry, an extremisation that is dual to the volume-minimisation of the Sasaki-Einstein manifold in the gravity sector.
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Book chapters on the topic "Exact Results in susy QFT"

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Seiberg, N. "The Power of Duality – Exact Results in 4D SUSY Field Theory." In The Oskar Klein Memorial Lectures, 43–57. WORLD SCIENTIFIC, 2001. http://dx.doi.org/10.1142/9789812799869_0003.

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Seiberg, N. "THE POWER OF DUALITY — EXACT RESULTS IN 4D SUSY FIELD THEORY." In The Oskar Klein Memorial Lectures, 339–53. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814571616_0020.

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Conference papers on the topic "Exact Results in susy QFT"

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Kazakov, D. "Exact results in Softly Broken SUSY GaugeTheories." In Corfu Summer Institute on Elementary Particle Physics. Trieste, Italy: Sissa Medialab, 1999. http://dx.doi.org/10.22323/1.001.0048.

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