The neutrino masses and the change of allowed parameter region in universal extra dimension models
نویسندگان
چکیده
Relic abundance of dark matter is investigated in the framework of universal extra dimension models with right-handed neutrinos. These models are free from the serious KaluzaKlein (KK) graviton problem that the original universal extra dimension model possesses. The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework. When ordinary neutrino masses are large enough such as the degenerate mass spectrum case, the dark matter relic abundance can change significantly. The scale of the extra dimension consistent with cosmological observations can be 500 GeV in the minimal setup of universal extra dimension models with right-handed neutrinos.
منابع مشابه
Relic abundance of dark matter in universal extra dimension models with right-handed neutrinos
Relic abundance of dark matter is investigated in the framework of universal extra dimension models with right-handed neutrinos. These models are free from the serious Kaluza-Klein (KK) graviton problem that the original universal extra dimension model has. The first KK particle of the right-handed neutrino is a candidate for dark matter in this framework, and its relic abundance is determined ...
متن کاملNeutrino Mass , Proton Decay and Dark Matter in TeV Scale Universal Extra Dimension Models
We show how the problem of small neutrino masses and suppressed proton decay can be simultaneously resolved in 6-D universal extra dimension models (UED) with a low fundamental scale using extended gauge groups that contain the local B − L symmetry. The extra space dimensions are compactified either on a T /Z2 or T /Z2 × Z ′ 2 orbifold depending on whether the full gauge group is SU(2)L×U(1)I3R...
متن کاملMixed Dark Matter in Universal Extra Dimension Models with TeV Scale W R and Z ′
We show that in a class of universal extra dimension (UED) models that solves both the neutrino mass and proton decay problems using low scale left-right symmetry, the dark matter of the Universe consists of an admixture of KK photon and KK right-handed neutrinos. We present a full calculation of the dark matter density in these models taking into account the co-annihilation effects due to near...
متن کاملA universal seesaw mechanism in five dimensions
We show the universal seesaw in the extra dimension setup, where three extra vector-like fields exist in the 5D bulk with heavy masses. We take the framework of the left-right symmetric model. The universal seesaw formula is easily obtained as a replacement of the vector-like mass in 4D case Mi to 2M∗ tan[πRMi] (M∗: 5D Planck scale, Mi: vector-like bulk mass, and R: compactification radius). Th...
متن کاملA Model for Neutrino and Charged Lepton Masses in Extra Dimensions
We propose a model with one large submm size extra dimension in which the gravity and right-handed (RH) neutrino propagate, but the three Standard Model (SM) families are confined to fat branes of TeV −1 size or smaller. The charged leptons and the light neutrinos receive mass from the five dimensional Yukawa couplings with the SM singlet neutrino via electroweak Higgs, while the KK excitations...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008