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

Yıl 2018, Cilt: 4 Sayı: 1, 53 - 63, 27.06.2018

Durmuş Karabacak

https://doi.org/10.22531/muglajsci.419831

Öz

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.

Anahtar Kelimeler

Büyük Hadron Çarpıştırıcısı, Evrensel Çok Boyutlar, Süpersimetri, Fenomenoloji

UNIVERSAL EXTRA DIMENSIONS AND SUPERSYMMETRY AT THE HL/HE-LARGE HADRON COLLIDER

Öz

Universal Extra Dimensional (UED) and Supersymmetric (SUSY) models show very similar signals at hadron colliders. In the minimal UED (mUED) where the mass spectrum is compressed, the production of level-1 KK quarks and/or gluons produce multi-jet and/or multi-lepton + missing transverse momenta final state as in the case of SUSY models with R-parity conservation and compressed mass spectrum. Moreover, this similarity can possibly be carried over to non-degenerate mass spectra in next-to-minimal UED (nmUED) model that is the extension of the mUED model with fermion bulk mass term μ and brane localized kinetic terms r, hence, completing the faking in both models. In this regard, we simulated the production of colored level-1 KK particles and their decays resulting in multi-jet + missing transverse momenta signals in both models at 14 TeV LHC and showed that the similarity of both models is indeed the case even with non-compressed mass spectra

Anahtar Kelimeler

The Large Hadron Collider, Universal Extra Dimensions, Supersymmetry, Phenomenology

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