Relevant bibliographies by topics / Four-quark condensates

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Four-quark condensates'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Four-quark condensates"

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Eletsky, V. L. "Four-quark condensates at T≠0." Physics Letters B 299, no. 1-2 (January 1993): 111–14. http://dx.doi.org/10.1016/0370-2693(93)90890-t.

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Hong-Shi, Zong, and Sun Wei-Min. "Modified Approach for Calculating Four-Quark Condensates." Communications in Theoretical Physics 47, no. 2 (February 2007): 293–98. http://dx.doi.org/10.1088/0253-6102/47/2/021.

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Thomas, R., T. Hilger, and B. Kämpfer. "Four-quark condensates in nucleon QCD sum rules." Nuclear Physics A 795, no. 1-4 (November 2007): 19–46. http://dx.doi.org/10.1016/j.nuclphysa.2007.08.012.

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MOFFAT, J. W. "FINITE ELECTROWEAK THEORY WITHOUT A HIGGS PARTICLE." Modern Physics Letters A 06, no. 11 (April 10, 1991): 1011–21. http://dx.doi.org/10.1142/s0217732391001068.

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A unified electroweak theory is formulated using non-local field theory without including a Higgs particle. The W and Z gauge boson masses are induced from one-loop vacuum polarization graphs and the non-local weak scale is determined by the W boson mass and the Fermi constant to be Λw=424 GeV . The tree graphs for the gauge bosons are identical to those of the standard local electroweak theory, so any violation of locality occurs only at the quantum level for the finite loop graphs. The fermion masses are obtained from a four-Fermi interaction with a spontaneously broken vacuum based on the fermion condensate [Formula: see text]. The problem of severe fine tuning for the quark condensates in the standard local point field theory is avoided in our non-local field theory. The theory contains only the known particle spectrum of leptons, quarks, the anticipated top quark, the W and Z gauge bosons and the photon. The quark condensates could generate a spectrum of heavy vector bound states at an energy scale ~1−2 TeV .
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Thomas, R., T. Hilger, and B. Kämpfer. "Role of four-quark condensates in QCD sum rules." Progress in Particle and Nuclear Physics 61, no. 1 (July 2008): 297–303. http://dx.doi.org/10.1016/j.ppnp.2007.12.028.

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Hilger, T., T. Buchheim, B. Kämpfer, and S. Leupold. "Four-quark condensates in open-charm chiral QCD sum rules." Progress in Particle and Nuclear Physics 67, no. 2 (April 2012): 188–93. http://dx.doi.org/10.1016/j.ppnp.2011.12.016.

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Leupold, Stefan. "Factorization and non-factorization of in-medium four-quark condensates." Physics Letters B 616, no. 3-4 (June 2005): 203–7. http://dx.doi.org/10.1016/j.physletb.2005.04.046.

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Kartvelishvili, V. G., and M. V. Margvelashvili. "Pion parameters and four quark condensates from τ-decay data." Zeitschrift für Physik C Particles and Fields 55, no. 1 (March 1992): 83–88. http://dx.doi.org/10.1007/bf01558291.

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Khunjua, T. G., V. C. Zhukovsky, K. G. Klimenko, and R. N. Zhokhov. "Duality and Charged Pion Condensation in Chirally Asymmetric Dense Quark Matter in the Framework of an NJL2 Model." International Journal of Modern Physics: Conference Series 47 (January 2018): 1860093. http://dx.doi.org/10.1142/s2010194518600935.

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In this talk we present investigation of the phase structure of a (1+1)-dimensional quark model with four-quark interaction and in the presence of baryon ([Formula: see text]), isospin ([Formula: see text]) and chiral isospin ([Formula: see text]) chemical potentials. Spatially homogeneous and inhomogeneous (chiral density wave (for chiral condensate) and single wave (for charged pion condensate)) condensates are considered. It is established that in the large-[Formula: see text] limit ([Formula: see text] is the number of colored quarks) there exists a duality correspondence between the chiral symmetry breaking phase and the charged pion condensation (PC) one. The primary conclusion of this investigation is the fact that chiral isospin chemical potential generates charged pion condensation with non-zero baryon density in dense quark matter. Moreover, it is shown that inhomogeneous charged PC phase with nonzero baryon density is induced in the model by arbitrary small values of the chemical potential [Formula: see text] (for a rather large region of [Formula: see text] and [Formula: see text]).
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Fariborz, Amir H., and Renata Jora. "Examining a possible cascade effect in chiral symmetry breaking." Modern Physics Letters A 32, no. 02 (December 29, 2016): 1750008. http://dx.doi.org/10.1142/s0217732317500080.

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We examine a toy model and a cascade effect for confinement and chiral symmetry breaking which consists in several phase transitions corresponding to the formation of bound states and chiral condensates with different number of fermions for a strong group. We analyze two examples: regular quantum chromodynamics (QCD) where we calculate the “four quark” vacuum condensate and a preon composite model based on QCD at higher scales. In this context, we also determine the number of flavors at which the second chiral and confinement phase transitions occur and discuss the consequences.
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Dissertations / Theses on the topic "Four-quark condensates"

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Thomas, Ronny. "In-Medium QCD Sum Rules for omega Meson, Nucleon and D Meson." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1233231634620-61511.

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The modifications of hadronic properties caused by an ambient nuclear medium are investigated within the scope of QCD sum rules. This is exemplified for the cases of the omega meson, the nucleon and the D meson. By virtue of the sum rules, integrated spectral densities of these hadrons are linked to properties of the QCD ground state, quantified in condensates. For the cases of the omega meson and the nucleon it is discussed how the sum rules allow a restriction of the parameter range of poorly known four-quark condensates by a comparison of experimental and theoretical knowledge. The catalog of independent four-quark condensates is covered and relations among these condensates are revealed. The behavior of four-quark condensates under the chiral symmetry group and the relation to order parameters of spontaneous chiral symmetry breaking are outlined. In this respect, also the QCD condensates appearing in differences of sum rules of chiral partners are investigated. Finally, the effects of an ambient nuclear medium on the D meson are discussed and relevant condensates are identified
Die Veränderungen von Hadroneneigenschaften durch ein umgebendes nukleares Medium (Kernmaterie) werden mit der Methode der QCD-Summenregeln untersucht. Dies wird am Beispiel des omega-Mesons, des Nukleons und des D-Mesons vorgeführt. Durch die Summenregeln werden integrierte Spektraldichten dieser Hadronen in Beziehung zu Eigenschaften des QCD-Grundzustandes, quantifiziert in Kondensaten, gesetzt. Diskutiert wird am Beispiel des omega-Mesons und des Nukleons, wie diese Summenregeln eine Einschränkung des Parameterbereiches von wenig bekannten Vierquark-Kondensaten durch Vergleich von experimentellen und theoretischen Erkenntnissen erlauben. Ein Katalog unabhängiger Vierquark-Kondensate wird aufgestellt und Relationen zwischen diesen Kondensaten werden deutlich gemacht. Das Verhalten der Vierquark-Kondensate unter der chiralen Symmetriegruppe und der Zusammenhang mit Ordnungsparametern spontaner chiraler Symmetriebrechung werden behandelt. In dieser Hinsicht werden auch die in Differenzen der Summenregeln chiraler Partner eingehenden QCD-Kondensate untersucht. Schließlich werden die Effekte endlicher Kerndichten beim D-Meson diskutiert und relevante Kondensate identifiziert
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Thomas, Ronny. "In-Medium QCD Sum Rules for omega Meson, Nucleon and D Meson." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23612.

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Abstract:
The modifications of hadronic properties caused by an ambient nuclear medium are investigated within the scope of QCD sum rules. This is exemplified for the cases of the omega meson, the nucleon and the D meson. By virtue of the sum rules, integrated spectral densities of these hadrons are linked to properties of the QCD ground state, quantified in condensates. For the cases of the omega meson and the nucleon it is discussed how the sum rules allow a restriction of the parameter range of poorly known four-quark condensates by a comparison of experimental and theoretical knowledge. The catalog of independent four-quark condensates is covered and relations among these condensates are revealed. The behavior of four-quark condensates under the chiral symmetry group and the relation to order parameters of spontaneous chiral symmetry breaking are outlined. In this respect, also the QCD condensates appearing in differences of sum rules of chiral partners are investigated. Finally, the effects of an ambient nuclear medium on the D meson are discussed and relevant condensates are identified.
Die Veränderungen von Hadroneneigenschaften durch ein umgebendes nukleares Medium (Kernmaterie) werden mit der Methode der QCD-Summenregeln untersucht. Dies wird am Beispiel des omega-Mesons, des Nukleons und des D-Mesons vorgeführt. Durch die Summenregeln werden integrierte Spektraldichten dieser Hadronen in Beziehung zu Eigenschaften des QCD-Grundzustandes, quantifiziert in Kondensaten, gesetzt. Diskutiert wird am Beispiel des omega-Mesons und des Nukleons, wie diese Summenregeln eine Einschränkung des Parameterbereiches von wenig bekannten Vierquark-Kondensaten durch Vergleich von experimentellen und theoretischen Erkenntnissen erlauben. Ein Katalog unabhängiger Vierquark-Kondensate wird aufgestellt und Relationen zwischen diesen Kondensaten werden deutlich gemacht. Das Verhalten der Vierquark-Kondensate unter der chiralen Symmetriegruppe und der Zusammenhang mit Ordnungsparametern spontaner chiraler Symmetriebrechung werden behandelt. In dieser Hinsicht werden auch die in Differenzen der Summenregeln chiraler Partner eingehenden QCD-Kondensate untersucht. Schließlich werden die Effekte endlicher Kerndichten beim D-Meson diskutiert und relevante Kondensate identifiziert.
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Conference papers on the topic "Four-quark condensates"

1

Leupold, Stefan. "Weinberg sum rules, four-quark condensates and chiral symmetry restoration." In PARTICLES AND NUCLEI: Seventeenth Internatinal Conference on Particles and Nuclei. AIP, 2006. http://dx.doi.org/10.1063/1.2220223.

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Thomas, R., T. Hilger, S. Zschocke, and B. Kämpfer. "Impact of Four-Quark Condensates on In-Medium Effects of Hadrons." In QUARK CONFINEMENT AND THE HADRON SPECTRUM VII: 7th Conference on Quark Confinement and the Hadron Spectrum - QCHS7. AIP, 2007. http://dx.doi.org/10.1063/1.2714393.

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Shintani, Eigo. "Strong coupling constant and four-quark condensates from vacuum polarization functions with dynamical overlap fermions." In The XXVI International Symposium on Lattice Field Theory. Trieste, Italy: Sissa Medialab, 2009. http://dx.doi.org/10.22323/1.066.0134.

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Ahmady, Mohammad R., and Victor Elias. "Quark- and gluon-condensate contributions to penguin four-Fermi operators." In High energy physics at the millennium: MRST (Montreal-Rochester-Syracuse-Ontario)’99 "The sundarfest". American Institute of Physics, 1999. http://dx.doi.org/10.1063/1.1301307.

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