منابع مشابه
Anthropic Constraints on Fermion Masses *
It is conceivable that some of the properties of the physical world might not be uniquely determined by an underlying dynamical principle, but might instead reflect the requirement that those properties be compatible with the existence of intelligent observers like us, capable of studying them. In modern theoretical physics, this controversial idea is called the “anthropic principle” [1]. Broad...
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In the context of models where the dark energy density rD is a random variable, anthropic selection effects may explain both the ‘‘old’’ cosmological constant problem and the ‘‘time coincidence.’’ We argue that this type of solution to both cosmological constant problems entails a number of definite predictions, which can be checked against upcoming observations. In particular, the anthropic ap...
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I present a model for neutrino masses based on a hypothesis proposed by Friedberg and Lee. Invited talk presented at the IV International Workshop on Neutrino Oscillations, April 15-18 (2008) Venice, Italy 1 Prelude I am delighted to be giving a talk here in Italy on this very special day, April 15, Leonardo da Vinci’s birthday. Through my talk, I will turn to him for guidance and understanding...
متن کاملFlavor Mixing, Quark Masses, Neutrino Masses and Neutrino Oscillations
We discuss first the flavor mixing of the quarks, using the texture zero mass matrices. Then we study a similar model for the mass matrices of the leptons. We are able to relate the mass eigenvalues of the charged leptons and of the neutrinos to the mixing angles and can predict the masses of the neutrinos. We find a normal hierarchy the masses are 0.004 eV, 0.01 eV and 0.05 eV. The atmospheric...
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It has been claimed that the observed magnitude of the vacuum energy density is consistent with the distribution predicted in anthropic models, in which an ensemble of universes is assumed. This calculation is revisited, without making the assumption that the CMB temperature is known, and considering in detail the possibility of a recollapsing universe. New accurate approximations for the growt...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2005
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.71.103523