Effective couplings and perturbative unification
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In this paper, the influence of threshold effects due to massive degrees of freedom in the evolution with scale of gauge coupling constants was studied, and it was shown that threshold effects bring conflict between the known experimental data at m Z, the naturalness upper bound on the masses of susy partners and the perturbative unification of couplings.About:
This article is published in Nuclear Physics.The article was published on 1995-09-11 and is currently open access. It has received 11 citations till now. The article focuses on the topics: Grand Unified Theory & Supersymmetry.read more
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Fermion masses, neutrino oscillations, and proton decay in the light of superKamiokande
TL;DR: In this article, a predictive SO (10)-based framework was proposed for neutrino masses and mixing of all quarks and leptons. But the model is not suitable for the case of neutrinos and does not support a small-angle MSW mechanism.
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The problems of unification-mismatch and low α3: A solution with light vector-like matter
K. S. Babu,Jogesh C. Pati +1 more
TL;DR: In this paper, it is suggested that the four-dimensional unified string coupling should very likely have an intermediate value (∼ 0.2 − 0.3, say) so that it may be large enough to stabilize the dilaton but not so large as to disturb the coupling-unification relations.
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Physical Renormalization Schemes and Grand Unification
TL;DR: In this paper, the authors analyzed supersymmetric grand unification in the context of physical renormalization schemes and found a number of qualitative differences and improvements in precision over conventional approaches.
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Unification predictions
TL;DR: In this article, the authors make a precise determination of these predictions for a class of models which extend the multiplet structure of the minimal supersymmetric standard model to include the heavy states expected in many Grand Unified and/or superstring theories.
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Supersymmetry: from the Fermi scale to the Planck scale
TL;DR: The physics of supersymmetry is reviewed from the perspective of physics at ever increasing energies, starting from the minimal supersymmetric extension of the standard model at the electroweak scale, and proceeding to higher energies seeking to understand the origin of the many model parameters.
References
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Review of particle properties.
K. Hagiwara,Ken Ichi Hikasa,Koji Nakamura,Masaharu Tanabashi,M. Aguilar-Benitez,Claude Amsler,R. M. Barnett,Patricia R. Burchat,C. D. Carone,C. Caso,G. Conforto,Olav Dahl,Michael Doser,Semen Eidelman,Jonathan L. Feng,L. K. Gibbons,Maury Goodman,Christoph Grab,D. E. Groom,Atul Gurtu,Atul Gurtu,K. G. Hayes,J. J. Herna`ndez-Rey,K. Honscheid,Christopher Kolda,Michelangelo L. Mangano,David Manley,Aneesh V. Manohar,John March-Russell,Alberto Masoni,Ramon Miquel,Klaus Mönig,Hitoshi Murayama,Hitoshi Murayama,S. Sánchez Navas,Keith A. Olive,Luc Pape,C. Patrignani,A. Piepke,Matts Roos,John Terning,Nils A. Tornqvist,T. G. Trippe,Petr Vogel,C. G. Wohl,Ron L. Workman,W-M. Yao,B. Armstrong,P. S. Gee,K. S. Lugovsky,S. B. Lugovsky,V. S. Lugovsky,Marina Artuso,D. Asner,K. S. Babu,E. L. Barberio,Marco Battaglia,H. Bichsel,O. Biebel,Philippe Bloch,Robert N. Cahn,Ariella Cattai,R. S. Chivukula,R. Cousins,G. A. Cowan,Thibault Damour,K. Desler,R. J. Donahue,D. A. Edwards,Victor Daniel Elvira,Jens Erler,V. V. Ezhela,A Fassò,W. Fetscher,Brian D. Fields,B. Foster,Daniel Froidevaux,Masataka Fukugita,Thomas K. Gaisser,L. Garren,H.-J. Gerber,Frederick J. Gilman,Howard E. Haber,C. A. Hagmann,J.L. Hewett,Ian Hinchliffe,Craig J. Hogan,G. Höhler,P. Igo-Kemenes,John David Jackson,Kurtis F Johnson,D. Karlen,B. Kayser,S. R. Klein,Konrad Kleinknecht,I.G. Knowles,P. Kreitz,Yu V. Kuyanov,R. Landua,Paul Langacker,L. S. Littenberg,Alan D. Martin,Tatsuya Nakada,Tatsuya Nakada,Meenakshi Narain,Paolo Nason,John A. Peacock,Helen R. Quinn,Stuart Raby,Georg G. Raffelt,E. A. Razuvaev,B. Renk,L. Rolandi,Michael T Ronan,L.J. Rosenberg,Christopher T. Sachrajda,A. I. Sanda,Subir Sarkar,Michael Schmitt,O. Schneider,Douglas Scott,W. G. Seligman,Michael H. Shaevitz,Torbjörn Sjöstrand,George F. Smoot,Stefan M Spanier,H. Spieler,N. J. C. Spooner,Mark Srednicki,A. Stahl,Todor Stanev,M. Suzuki,N. P. Tkachenko,German Valencia,K. van Bibber,Manuella Vincter,D. R. Ward,Bryan R. Webber,M R Whalley,Lincoln Wolfenstein,J. Womersley,C. L. Woody,O. V. Zenin +142 more
TL;DR: This biennial Review summarizes much of Particle Physics using data from previous editions, plus 2205 new measurements from 667 papers, and features expanded coverage of CP violation in B mesons and of neutrino oscillations.
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Asymptotically Free Gauge Theories. I
David J. Gross,Frank Wilczek +1 more
TL;DR: In this paper, the renormalization-group equations are derived for Yang-Mills theories and the parameters that enter into the equations are calculated to lowest order and it is shown that these theories are asymptotically free.
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Comparison of grand unified theories with electroweak and strong coupling constants measured at LEP
TL;DR: In this paper, the DELPHI Collaboration data was used to show that in the minimal non-supersymmetric standard model with one Higgs doublet a single unification point is excluded by more than 7 standard deviations.
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Quantum electrodynamics at small distances
Murray Gell-Mann,F.E. Low +1 more
TL;DR: In this paper, it was shown that the perturbation series to all orders in the coupling constant takes on very simple asymptotic forms and that the series satisfy certain functional equations by virtue of the renormalizability of the theory.
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Infrared Singularities and Massive Fields
Thomas Appelquist,J J Carazzone +1 more
TL;DR: In this paper, it is shown in the context of a simple model of gauge mesons coupled to massive fermions that the heavy fields decouple at low momenta except for their contribution to renormalization effects.