scholarly journals Solving cosmological problem in universal extra dimension models by introducing Dirac neutrino

2007 ◽  
Vol 647 (5-6) ◽  
pp. 466-471 ◽  
Author(s):  
Shigeki Matsumoto ◽  
Joe Sato ◽  
Masato Senami ◽  
Masato Yamanaka
Keyword(s):  
Extra Dimension ◽  
Universal Extra Dimension ◽  
Dirac Neutrino ◽  
Cosmological Problem

INTRODUCING NEUTRINO MASS INTO UNIVERSAL EXTRA DIMENSION MODELS AND SOLVING COSMOLOGICAL PROBLEM

2007 ◽  
Vol 16 (05) ◽  
pp. 1571-1582
Author(s):  
SHIGEKI MATSUMOTO ◽  
JOE SATO ◽  
MASATO YAMANAKA ◽  
MASATO SENAMI
Keyword(s):  
Cosmic Microwave Background ◽  
Neutrino Mass ◽  
Extra Dimension ◽  
Branching Ratios ◽  
Neutrino Masses ◽  
Late Time ◽  
Universal Extra Dimension ◽  
Time Decay ◽  
Microwave Background ◽  
Cosmological Problem

Universal extra dimension (UED) models with right-handed neutrinos are studied. The introduction of the neutrinos makes us possible not only to describe Dirac neutrino masses but also to solve the cosmological problem called the KK graviton problem. This problem is essentially caused by the late time decay of a KK photon into a KK graviton and a photon, and it distorts the spectrum of the cosmic microwave background or the diffuse photon. We point out that, once we introduce right-handed neutrinos to UED models, the KK photon decays dominantly into neutrinos and does not emit a photon. We also discuss sub-dominant modes with a photon in the decay quantitatively, and show that their branching ratios are so small that the spectra are not distorted.

scholarly journals A bound on universal extra dimension models from up to 2 fb−1 of LHC data at 7 TeV

2012 ◽  
Vol 707 (5) ◽  
pp. 506-511 ◽  
Author(s):  
Kenji Nishiwaki ◽  
Kin-ya Oda ◽  
Naoya Okuda ◽  
Ryoutaro Watanabe
Keyword(s):  
Extra Dimension ◽  
Universal Extra Dimension

scholarly journals Bounds on universal extra dimension from LHC run I and II data

2016 ◽  
Vol 763 ◽  
pp. 155-160 ◽  
Author(s):  
Debajyoti Choudhury ◽  
Kirtiman Ghosh
Keyword(s):  
Extra Dimension ◽  
Universal Extra Dimension

scholarly journals Effects of a Single Universal Extra Dimension in Bc→Ds,Dl+l- Decays

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
U. O. Yilmaz ◽  
E. Danapinar
Keyword(s):  
Extra Dimension ◽  
Branching Ratios ◽  
Universal Extra Dimension ◽  
Final State ◽  
Decay Channels

The rare semileptonic Bc→Ds,dl+l- decays are studied in the universal extra dimension with a single extra dimension scenario. The sensitivity of differential and total branching ratios and polarization asymmetries of final state leptons to the compactification parameter are presented, for both muon and tau decay channels. Considering the ability of available experiments, it would be useful to study these effects.

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