We discuss the possibility of identifying the effects of graviton exchange in extra dimensions from other new physics scenarios parametrized by the four-fermion compositeness-inspired contact interactions, and viceversa, using the polarized differential cross section in high energy e+ e- annihilation into fermion-pairs.
Новые поступления электронной библиотеки
The η, η' system was under investigation. Mixing angles for octet-singlet mixing and for quark-flavor bases were fixed. The decay constants of radiative V —> Pו and P —> Vו (P = η, η' ; V = р, w, ϕ) decays were calculated. The weak decay constants for η, η' mesons were concidered. We have obtained the numerical relations between constants in different bases.
2023-02-21
Arkani-Hamed, Dimopoulous, and Dvali have proposed a model (ADD) of low-scale quantum gravity featuring large extra dimensions. In this model, the exchange of Kaluza-Klein towers of gravitons can enhance the production rate of lepton pairs at high invariant mass in proton-proton collisions at the LHC. By considering the present and future LHC energy regimes, we reanalyse the potential of the LHC to
discover the effects of large extra dimensions and to discriminate between various theoretical models. Specifically, in latter case we explore the capability of the LHC to distinguish spin-2 Kaluza-Klein towers of gravitons exchange from other new physics effects which might be conveniently parametrized by the four-fermion contact interactions. We find that the LHC with planned energy 14 TeV and luminosity 100 fb-1will be capable of discovering (and identifying) graviton exchange effects in the large extra dimensions with the cutoff parameter of order Ms = 6.2 TeV (4.8 TeV) for d= 6 and Ms = 8.8 TeV (6.8 TeV) for d = 3.
2023-02-21
We discuss the potential to search for unparticle physics associated with the scale invariant sector proposed by Georgi in the W boson pair production processes in electron-positron collisions at the International linear collider (ILC). unparticle physics associated with the scale invariant sector proposed by Georgi. We have shown that the unparticle contributions are quite comparable with standard model (SM) specially for low values of non-integral scaling dimension (du) and hence it is worthwhile to explore in current and future colliders. The ILC sensitivity to the spin-2 Unparticles parameters was compared for unpolarized and polarized initial electron and positron beams.
2023-02-20
We research pseudoscalar and vector mesons in a relativistic constituent-quark model in the u-, d- and s-quark sector. Using experimental data for masses of mesons we determinate basic parameters of our model and analyzing radiative decay of light vector mesons, using this parameters.
2023-02-20
Приведены требования к оформлению курсовой работы, представлен порядок ее защиты. Рассмотрены темы курсового проекта, составленные в соответствии с рабочей программой
курса «Организация производства». Для студентов специальности 1-27 01 01 «Экономика и организация производства» дневной формы обучения.
2023-02-20
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