Efektif U(1)' Modellerinde Doğallığın İncelenmesi

Bu çalıșmada Süpersimetrik U(1)’ Modeller'inde parçacık kütlelerinin deneylerle uyumlu bölgeleri belirlenmiștir. Bu yapılırken, renormalizasyon grup eșitlikleri ile Büyük Birleșim Teorisi (BBT) skalasından zayıf skalaya getirilen At , Ab , As, ht, hb, hs.... vb. parametreler kullanılmıștır. Ardından, bu izin verilen bölgeler için ince-ayar hesaplanmıștır. Tüm hesaplamalarda eldeki deneysel veriler göz önüne alınmıștır. Sonuç olarak, en düșük ince ayara sahip (en doğal) parametre uzaylarının belirttiği en hafif Higgs kütlesi hesaplanmıștır.

Investigation of Naturalness in Effective U(1)' Models

In this study, regions compatible with experiments of the particle masses m%, m%, mt%, m%, m′b% Z′ are determined for Supersymmetric U(1)' Models. While doing this, it is used the parameters, At , Ab , As, ht, hb, hs.... etc. brought from Grand Unification Theory (GUT) scale to the weak scale by renormalization group equations. Then, fine-tuning for the allowed regions is calculated. As a result, the lightest Higgs mass, noted parameter spaces with the lowest fine-tuning (the most natural), is calculated.

Keywords:

Supersymmetry, U(1)' Model Fine tuning,

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H. Sert, E. Cincioglu, D. A. Demir and L. Solmaz, Tevatron Higgs mass bounds: Projecting U(1)' models to LHC domain, Physics Letters B 692, 327, (2010).
D. A. Demir, G. L. Kane and T. T. Wang, Minimal U(1)′ extension of the minimal supersymmetric standard model, Physical Review D 72, 015012 (2005).
E. Cincioglu, Z. Kirca, H. Sert, S. Solmaz, L. Solmaz and Y. Hicyilmaz, Muon anomalous magnetic moment constraints on supersymmetric U(1)′ Physical Review D 82 (2010).
V. Barger, P. Langacker, H. -S. Lee and G. Shaughnessy, Higgs sector in extensions of the MSSM, Physical Review D 73(2006).
Erler, J. , P. Langacker, S. Munir and E. R. Pena, Improved Constraints on Z’ Bosons from Electroweak Precision Data, Journal of High Energy Physics 0908, (2009).
A. Hayreter, A. Sabanci, L. Solmaz and S. Solmaz, Electric dipole moments in U(1)′ models, Physical Review D 78, 055011 (2008).
D. A. Demir and L. L. Everett, CP violation in supersymmetric U(1)′ models, Physical Review D 69, 015008 (2004).
R. Barbieri and G. F. Giudice, Upper bounds on supersymmetric particle masses, Nuclear Physics B 306, 63 (1988). models,
CDF and D0 Collaborations,Combination of Tevatron Searches for the Standard Model Higgs Boson in the W+W- Decay Mode, Physical Review Letters 104, (2010).
CMS Collaboration, Combined results of searches for the standard model Higgs boson in pp collisions at sqrt(s) = 7 TeV, ATLAS Collaboration, Combined search for the Standard Model Higgs boson using up to 4.9 fb-1 of pp collision data at sqrt(s) = 7 TeV with the ATLAS detector at the LHC, arXiv:1202.1408 [hep-ex].