Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi
Bu çalışmada Büyük Hadron Çarpıştırıcısı (BHÇ) ve karanlık madde sonuçları çerçevesinde, son dene... more Bu çalışmada Büyük Hadron Çarpıştırıcısı (BHÇ) ve karanlık madde sonuçları çerçevesinde, son deneysel veriler kullanılarak sınırlandırılmış Minimal Süpersimetrik Standart Model (CMSSM)'in durumu incelenmiş ve parametre uzayına ilişkin sınırlamalar gözlemlenerek gelecekteki deneyler için öngörülerde bulunulmuştur.
We conduct a numerical study over the constrained MSSM (CMSSM), Next-to-MSSM (NMSSM) and U(1) ext... more We conduct a numerical study over the constrained MSSM (CMSSM), Next-to-MSSM (NMSSM) and U(1) extended MSSM (UMSSM) to probe the allowed mass ranges of the charged Higgs boson and its dominant decay patterns, which might come into prominence in near future collider experiments. We present results obtained from a limited scan for CMSSM as a basis and compare its predictions with the extended models. We observe within our data that a wide mass range is allowed as 0.5(1) ≲ m_H^±≲ 17 TeV in UMSSM (NMSSM). We find that the dominant decay channel is mostly H^±→ tb such that BR(H^±→ tb) ∼ 80%. While this mode remains dominant over the whole allowed parameter space of CMSSM, we realize some special domains in the NMSSM and UMSSM, in which BR(H^±→ tb) ≲ 10%. In this context, the decay patterns of the charged Higgs can play a significant role to distinguish among the SUSY models. In addition to the tb decay mode, we find that the narrow mass scale in CMSSM allows only the decay modes for the ...
We perform a comprehensive analysis of the the secluded UMSSM model, consistent with present expe... more We perform a comprehensive analysis of the the secluded UMSSM model, consistent with present experimental constraints. We find that in this model the additional $Z^\prime$ gauge boson can be leptophobic without resorting to gauge kinetic mixing and, consequently, also $d$-quark-phobic, thus lowering the LHC bounds on its mass. The model can accommodate very light singlinos as DM candidates, consistent with present day cosmological and collider constraints. Light charginos and neutralinos are responsible for muon anomalous magnetic predictions within 1$\sigma$ of the measured experimental value. Finally, we look at the possibility that a lighter $Z^\prime$, expected to decay mainly into di-leptons through charginos, could be observed at 27 TeV.
We attribute deviations of the muon and electron magnetic moments from the theoretical prediction... more We attribute deviations of the muon and electron magnetic moments from the theoretical predictions to the presence of an additional U(1)′ supersymmetric model. We interpret the discrepancies between the muon and electron anomalous magnetic moments to be due to the presence of non-universal U(1)′ charges. In a minimally extended model, we show that requiring both deviations to be satisfied imposes constraints on the spectrum of the model, in particular on dark matter candidates and slepton masses and ordering. Choosing three benchmarks with distinct dark matter features, we study implications of the model at colliders, concentrating on variables that can distinguish our non-universal scenario from other U(1)′ implementations.
Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
Bu çalışmada, Büyük Hadron Çarpıştırıcısı'nda (BHÇ) Standart Model’in Higgs sektörü yüksek ha... more Bu çalışmada, Büyük Hadron Çarpıştırıcısı'nda (BHÇ) Standart Model’in Higgs sektörü yüksek halka mertebelerinde incelenmiştir. Literatürde dört halka mertebesine kadar hesaplanmış olan Higgs'in efektif potansiyelinden türetilecek Higgs'in öz bağlaşım sabitleri kullanılarak BHÇ’daki Higgs süreçlerine ait tesir kesitleri hesaplanmıştır. Bu sayede Standart Model öngörüsü çerçevesindeki Higgs sektörü, yüksek halka mertebelerinde düzeltilmiş haliyle çarpıştırıcılarda test edilebilecek ve çıkan sonuçlar elimizde bir altyapı olduğu için sağlıklı bir şekilde tartışılabilecektir.633339
Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi
Bu çalışmada Büyük Hadron Çarpıştırıcısı (BHÇ) ve karanlık madde sonuçları çerçevesinde, son dene... more Bu çalışmada Büyük Hadron Çarpıştırıcısı (BHÇ) ve karanlık madde sonuçları çerçevesinde, son deneysel veriler kullanılarak sınırlandırılmış Minimal Süpersimetrik Standart Model (CMSSM)'in durumu incelenmiş ve parametre uzayına ilişkin sınırlamalar gözlemlenerek gelecekteki deneyler için öngörülerde bulunulmuştur.
We conduct a numerical study over the constrained MSSM (CMSSM), Next-to-MSSM (NMSSM) and U(1) ext... more We conduct a numerical study over the constrained MSSM (CMSSM), Next-to-MSSM (NMSSM) and U(1) extended MSSM (UMSSM) to probe the allowed mass ranges of the charged Higgs boson and its dominant decay patterns, which might come into prominence in near future collider experiments. We present results obtained from a limited scan for CMSSM as a basis and compare its predictions with the extended models. We observe within our data that a wide mass range is allowed as 0.5(1) ≲ m_H^±≲ 17 TeV in UMSSM (NMSSM). We find that the dominant decay channel is mostly H^±→ tb such that BR(H^±→ tb) ∼ 80%. While this mode remains dominant over the whole allowed parameter space of CMSSM, we realize some special domains in the NMSSM and UMSSM, in which BR(H^±→ tb) ≲ 10%. In this context, the decay patterns of the charged Higgs can play a significant role to distinguish among the SUSY models. In addition to the tb decay mode, we find that the narrow mass scale in CMSSM allows only the decay modes for the ...
We perform a comprehensive analysis of the the secluded UMSSM model, consistent with present expe... more We perform a comprehensive analysis of the the secluded UMSSM model, consistent with present experimental constraints. We find that in this model the additional $Z^\prime$ gauge boson can be leptophobic without resorting to gauge kinetic mixing and, consequently, also $d$-quark-phobic, thus lowering the LHC bounds on its mass. The model can accommodate very light singlinos as DM candidates, consistent with present day cosmological and collider constraints. Light charginos and neutralinos are responsible for muon anomalous magnetic predictions within 1$\sigma$ of the measured experimental value. Finally, we look at the possibility that a lighter $Z^\prime$, expected to decay mainly into di-leptons through charginos, could be observed at 27 TeV.
We attribute deviations of the muon and electron magnetic moments from the theoretical prediction... more We attribute deviations of the muon and electron magnetic moments from the theoretical predictions to the presence of an additional U(1)′ supersymmetric model. We interpret the discrepancies between the muon and electron anomalous magnetic moments to be due to the presence of non-universal U(1)′ charges. In a minimally extended model, we show that requiring both deviations to be satisfied imposes constraints on the spectrum of the model, in particular on dark matter candidates and slepton masses and ordering. Choosing three benchmarks with distinct dark matter features, we study implications of the model at colliders, concentrating on variables that can distinguish our non-universal scenario from other U(1)′ implementations.
Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
Bu çalışmada, Büyük Hadron Çarpıştırıcısı'nda (BHÇ) Standart Model’in Higgs sektörü yüksek ha... more Bu çalışmada, Büyük Hadron Çarpıştırıcısı'nda (BHÇ) Standart Model’in Higgs sektörü yüksek halka mertebelerinde incelenmiştir. Literatürde dört halka mertebesine kadar hesaplanmış olan Higgs'in efektif potansiyelinden türetilecek Higgs'in öz bağlaşım sabitleri kullanılarak BHÇ’daki Higgs süreçlerine ait tesir kesitleri hesaplanmıştır. Bu sayede Standart Model öngörüsü çerçevesindeki Higgs sektörü, yüksek halka mertebelerinde düzeltilmiş haliyle çarpıştırıcılarda test edilebilecek ve çıkan sonuçlar elimizde bir altyapı olduğu için sağlıklı bir şekilde tartışılabilecektir.633339
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