Constraints on majoron models, neutrino masses and baryogenesis     

James M. Cline  Kimmo Kainulainen  Keith A. Olive 《Astroparticle Physics》1993,1(4):387-398

We derive strong constraints on the Yukawa couplings and the vacuum expectation value in the singlet majoron model. The presence of a small gravitationally induced mass for the majoron can be used to set a constraint on its vacuum expectation value. If the singlet symmetry breaking scale is larger than the electroweak symmetry breaking scale, lepton number violating interactions in equilibrium with electroweak sphaleron interactions would destroy any prior baryon asymmetry. If the baryon asymmetry is not generated at the electroweak scale or later, strong bounds on the Yukawa couplings h 10⁻⁷ and VEVs v_s < v_EW are derived. We also carefully rederive baryogenesis bounds on neutrino masses, finding that in general they apply not to the masses themselves, but only to related parameters, and they are numerically somewhat less stringent than has previously been claimed.  相似文献   

First 2-D Interferometric Radiometer Imaging of the Earth From an Aircraft     

Kainulainen  J. Rautiainen  K. Tauriainen  S. Auer  T. Kettunen  J. Hallikainen  M. 《Geoscience and Remote Sensing Letters, IEEE》2007,4(2):241-245

The Helsinki University of Technology has recently finished the construction of a 2-D airborne aperture synthesis radiometer and conducted a successful test flight with the complete instrument. During the test flight, a number of different brightness temperature sources were measured to examine the instrument's stability, electromagnetic compatibility issues, calibration methods, and image reconstruction algorithm. A set of images from this first test flight is presented, and their main features are discussed  相似文献