Emissivity of neutrinos in supernova in a left-right symmetric model A. Guti´ errez-Rodr´ıguez, 1 E. Torres-Lomas $^{1}$, and A. Gonz´ alez-S´ anchez 1 $^{1}$Facultad de F´ısica, Universidad Aut´ onoma de Zacatecas Apartado Postal C-580, 98060 Zacatecas, M´ exico. (Dated: November 22, 2018) Abstract We calculate the emissivity due to neutrino-pair production in e $^{+}$e − annihilation in the context of a left-right symmetric model in a way that can be used in supernova calculations. We also present some simple estimates which show that such process can act as an efficient energy-loss mechanism in the shocked supernova core. We find that the emissivity is dependent of the mixing angle φ of the model in the allowed range for this parameter. PACS numbers: 14.60.Lm,12.15.Mm, 12.60.-i Keywords: Ordinary neutrinos, neutral currents, models beyond the standard model. 1 arXiv:1001.0400v1 [hep-ph] 3 Jan 2010