Massa Neutrino dan Implikasinya terhadap Bilangan Kuantum Leptonik dan Keberadaan Materi Gelap  

Oleh:

Damanik, Asan

Jenis: Article from Journal - ilmiah nasional - tidak terakreditasi DIKTI
Dalam koleksi: SIGMA: Jurnal Sains dan teknologi vol. 2 no. 2 (Jul. 1999), page 44-50.
Topik: Oscillation; Weak interactions; Neutrino

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: SS25.2 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

According to Standard Model Practicle Pysics, neutrions with electron, muon, and tau are classified as lepton family. Leptonic practicles undergo weak interactions and short range. The electron, muon, and tau have non-zero mass and carry charges, but neutrinos have zero mass and are neutral. Therefore, it is very difficult to detect the presence of neutrinos in the laboratory. Massless neutrinos atre relevant to the gauge invariance principle and symmetry as a foundation of leptonic quantum number conservation law. many experiments performed since 1931 up to 1997 in measuring neutrno mass failed to observe neutino oscilliation, because oscilliation is a direct consequence of particles having non-zaero mass. But, in the International Physics Conference "Neutrino 98" held in Takayama, Japan, the super Kamiokande team claimed that they had observed neutrino oscilliation while it was travelling in the medium. According to the Super-Kamiokande team, the heaviest neutrino probably has a mass of about 0.05 eV. If neutrino has non zero mass, the lepptonic quantum number conservation law will be violated and the Standard Model must be extended to accomodate neutrino mass. Another implication of neutrino having non-zero mass is the possibility of placing neutrino as the dark mass and the missing mass in cosmology and astrophysics.

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