HL/HE BÜYÜK HADRON ÇARPIŞTIRICISIN’DA EVRENSEL ÇOK BOYUTLAR VE SÜPERSİMETRİ

Evrensel Çok Boyutlu (UED) ve Süpersimetrik (SUSY) kuramlar hadron çarpıştırıcılarında benzer sinyaller gösterirler. Parçacık spektrumunun sıkışık olduğu kısmi UED’de (mUED), R-paritesi’nin korunduğu ve sıkışık kütle durumuna spektrumuna sahip SUSY modellerinde olduğu gibi, 1. seviye Kaluza-Klein (KK) gluon ve kuarklar son durumda çoklu jet ve/veya çoklu lepton + kayıp transvers momentum üretirler. Dahası bu benzerlik durumu, fermiyon yığın kütle terimi ? ve zara sınırlı kinetik terimleri r ile mUED’nin bir uzantısı olan nmUED modeli vasıtasıyla, sıkışık olmayan kütle spektrumuna da taşınması imkânı olup, bu sayede benzeşme her durumda bütünlük göstermektedir. Bu bağlamda, 1. seviye renkli KK parçacıklarını (kuark ve gulion) ve sparçacıkar (skuark ve gulino) 14 TeV LHC’de üretimini ve bozunumunu çoklu jet + kayıp transvers momentum sinyalini üretmek suretiyle simüle ettik. Daha sonra, her iki modelden de gelen çoklu-jet son durumundan normalize edilmiş m_effdağılımlarını üretip karşılaştırdık. Her iki modelin benzeştiğini ve benzeşmenin, kimi sinyal bölgelerinde düşük istatistikten dolayı dalgalanmalar olmasına rağmen, ayrık kütle spektrumunda dahi gerçekleştiğini bulduk.

UNIVERSAL EXTRA DIMENSIONS AND SUPERSYMMETRY AT THE HL/HELARGE HADRON COLLIDER

Universal Extra Dimensional (UED) and Supersymmetric (SUSY) models show very similar signals at hadron colliders. Inthe minimal UED (mUED) where the mass spectrum is compressed, the production of level-1 KK quarks and/or gluonsproduce multi-jet and/or multi-lepton + missing transverse momenta final state as in the case of SUSY models with R-parityconservation and compressed mass spectrum. Moreover, this similarity can possibly be carried over to non-degenerate massspectra in next-to-minimal UED (nmUED) model that is the extension of the mUED model with fermion bulk mass term μand brane localized kinetic terms r, hence, completing the faking in both models. In this regard, we simulated the productionof colored level-1 KK particles (quarks and gluons) and colored sparticles (squarks and gulinos) with their decays resultingin multi-jet + missing transverse momenta signals in both models at 14 TeV LHC. Then we generated normalizedm_effdistributions originating from multi-jet final state in both models and compared. We found that the similarity of bothmodels is indeed the case even with non-compressed mass spectra though there are some fluctuations, in the distributionsfor some signal regions, resulting from low statistics

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