LEPTOGENESIS VIA HAMBURAN DALAM MODEL CERMIN TERMODIFIKASI

LALU HERIYANTO, Dr. Mirza Satriawan

2016 | Tesis | S2 Ilmu Fisika

Telah dibangun skenario leptogenesis via interaksi hamburan di Model Cermin Termodifikasi (MCT). Skenario ini dibangun untuk membangkitkan asimetri cacah lepton di sektor cermin (Delta_) dan sektor nyata (Delta_) di MCT, untuk menghasilkan asimetri cacah barion di masing-masing sektor dan memperkirakan rasio rapat energi materi cermin (Omega_{mc}) dengan rapat energi materi nyata (Omega_{mn}). Dari hasil perhitungan, untuk suhu reheating di sektor cermin (T_) yang besarnya sama dengan di sektor nyata (T_), , T_~10^9 GeV}, tetapi lebih kecil dari skala massa neutrino Majorana singlet (M ~10^ GeV), T_<M dan T_R < M, diperoleh asimetri cacah barion cermin (Delta_) dan asimetri cacah barion nyata (Delta_) di kedua sektor sama besar, Delta_=Delta_= 10^-10^, yang berdampak pada rapat energi barion cermin (Omega_) sama dengan rapat energi barion nyata (Omega_), Omega_=Omega_. Adapun besarnya rapat energi materi cermin (Omega_{mc}) sekitar 5 kali rapat energi materi nyata (Omega_{mn} ~ Omega_), Omega_{mc} sama dengan 5 kali Omega_. Rapat energi materi cermin terdiri atas 80 persen rapat energi elektron cermin (Omega_{E_{c}}) dan sisanya (20 persen) adalah rapat energi barion cermin, Omega_{E_{mc}} sama dengan 4 kali Omega_. Rasio rapat energi materi cermin dan rapat energi materi nyata cukup relevan dengan hasil observasi CMB yang menyebutkan bahwa rapat energi materi gelap (Omega_{mg}) sama dengan 5 kali rapat energi materi tampak (Omega_{mt}) yang didominasi oleh rapat energi barion tampak (Omega_{B_{t}}), Omega_{mg} sama dengan 5 kali Omega_{B_{t}}.

It has been built a scenario of leptogenesis via scattering interaction in Modified Mirror Model (MMM). This scenario is built to generate lepton number asymmetry in mirror sector (Delta_) and real sector (Delta_) in MMM, to produce baryon number asymmetry in each sector and estimates the ratio of mirror matter energy density (Omega_{mm}) with real matter energy density (Omega_{rm}). From the calculations, for reheating temperature in the mirror sector (T_) which is the same as in the real sectors (T_), T_, T_ similiar to 10^9 GeV, but smaller than the mass scale of singlet neutrino Majorana (M similiar to 10^ GeV), T_ less than M and T_ less than M, mirror baryon number asymmetry (Delta_) and real baryon number asymmetry (Delta_) in both sectors are equal, Delta_ equal with Delta_ equal with 10^-10^, that affect the mirror baryon energy density (Omega_) to be equal to the real baryon energy density (Omega_), Omega_ equal with Omega_. The amount of mirror matter energy density (Omega_{mm}) is approximately 5 times the real matter energy density (Omega_{rm} similiar to Omega_), Omega_{mm} equal with 5 times Omega_. The mirror matter energy density consists of 80 percent mirror electrons energy density (Omega_{E_{m}}) and the remainder (20 percent) is mirror baryons energy density, Omega_{E_{m}} equal with 4 times Omega_. The ratio of mirror matter energy density and real matter energy density is in concordance to the observation of CMB which states that dark matter energy density (Omega_{dm}) approximately 5 times the visible matter energy density (Omega_{vm}) that being dominated by visible baryon matter density (Omega_{B_{v}}), Omega_{dm} equal 5 times Omega_{B_{v}}.

Kata Kunci : leptogenesis, model cermin termodifikasi, asimetri cacah lepton, asimetri cacah barion./leptogenesis, modified mirror model, lepton number asymmetry, baryon number asymmetry.