CLICte iki Z-Bozonu Üretimi Aracılığıyla Anormal ZZZ ve ZZγ Bağlaşımlarının Tahmini

Year 2023, , 232 - 246, 15.03.2023

Emre Gürkanlı

https://doi.org/10.31466/kfbd.1240083

Abstract

Standart Modelin abelyen olmayan doğası ayar bozonlarının kendileriyle öz etkileşmelerinin varlığını gerektirir. Bu etkileşmeler Standart Modeli test etmek ve yeni fizik etkilerini görmek için önemlidir. Bu etkileri efektif teori kapsamında analiz etmek bu çalışmanın ana motivasyon kaynağını oluşturmaktadır. Bu çalışmada CLIC çarpıştırıcısında √s=3 TeV de polarize ve polarize olmayan elektron için e^- e^+→ZZ süreci aracılığıyla ZZZ ve ZZγ anormal yüksüz üçlü ayar bozonu bağlaşımları incelenmiştir. Son durumda Z-bosonunun yarı-leptonik bozunumu (Z→jj , Z→ν_l (ν_l ) ̅ ) dikkate alınmıştır. Burada CP ihlal eden C_BB/Λ^4 , C_BW/Λ^4 , C_WW/Λ^4 ve CP koruyan C_(B ̅W)/Λ^4 bağlaşımlarına odaklanılmıştır. Duyarlılıklar 95% güvenilirlik seviyesinde, sırasıyla polarize olmayan, 80% ve -80% polarize elektron için L_int=5 ab-1, L_int=1 ab-1 ve L_int=4 ab-1 ışınlılık değerleri kullanılarak hesaplanmıştır. Anormal bağlaşımlar için elde edilen duyarlılıklar deneysel limitlerden 3-20 kat daha sınırlayıcı iken literatürdeki ilgili fenomenolojik çalışmalarla karşılaştırılabilir seviyededir.

Keywords

Electroweak Interaction, Anomalous Triple Gauge Boson Couplings, Beyond Standard Model.

Prediction for the Anomalous ZZZ and ZZγ Couplings via two Z-boson Production at the CLIC

Abstract

The non-Abelian nature of the Standard Model (SM) entails the existence of the gauge bosons' self-interactions. The gauge bosons' self-interactions are important to test the SM and see the new physics effects. These effects can be analyzed in the effective theory approach which is the main aim of this study. We examine the ZZZ and ZZγ anomalous neutral triple gauge couplings (aNTGC) via the process e^- e^+→ZZ with both unpolarized and polarized electron beam with the √s=3 TeV at CLIC. In the final state, semi-leptonic decay of Z-bosons (Z→jj , Z→ν_l (ν_l ) ̅ ) are considered. We focused on CP-violating C_BB/Λ^4 , C_BW/Λ^4 , C_WW/Λ^4 and CP-conserving C_(B ̅W)/Λ^4 couplings. The sensitivities are obtained at 95% Confidence Level with luminosities of L_int=5 ab-1, L_int=1 ab-1 and L_int=4 ab-1 for unpolarized, 80% and -80% polarized electron beams, respectively. Obtained sensitivities on anomalous couplings are 3-20 times stringent than the current experimental limits and comparable with the related phenomenological studies in the literature.

Keywords

Electroweak Interaction, Anomalous Triple Gauge Boson Couplings, Beyond Standard Model.

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