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CERN Document Server 11 Datensätze gefunden  1 - 10nächste  gehen zum Datensatz: Die Suche hat 0.54 Sekunden gedauert. 
1.
On the Inflationary Perturbations of Massive Higher-Spin Fields / Kehagias, Alex (CERN ; Natl. Tech. U., Athens) ; Riotto, Antonio (Geneva U., Dept. Theor. Phys. ; Geneva U., CAP)
Cosmological perturbations of massive higher-spin fields are generated during inflation, but they decay on scales larger than the Hubble radius as a consequence of the Higuchi bound. By introducing suitable couplings to the inflaton field, we show that one can obtain statistical correlators of massive higher-spin fields which remain constant or decay very slowly outside the Hubble radius. [...]
arXiv:1705.05834.- 2017-07-26 - 22 p. - Published in : JCAP 07 (2017) 046 Fulltext: PDF;
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2.
Tensor to scalar ratio from single field magnetogenesis / Giovannini, Massimo (CERN ; INFN, Milan Bicocca)
The tensor to scalar ratio is affected by the evolution of the large-scale gauge fields potentially amplified during an inflationary stage of expansion. After deriving the exact evolution equations for the scalar and tensor modes of the geometry in the presence of dynamical gauge fields, it is shown that the tensor to scalar ratio is bounded from below by the dominance of the adiabatic contribution and it cannot be smaller than one thousands whenever the magnetogenesis is driven by a single inflaton field..
arXiv:1703.10488.- 2017-08-10 - 5 p. - Published in : Phys. Lett. B 771 (2017) 482-486 Article from SCOAP3: PDF; Fulltext: PDF;
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3.
Recent results from NA48/2 and NA62 experiments at CERN / Lurkin, Nicolas (Birmingham U.)
The NA48/2 and $\text{NA62}\text{-}{\text{R}_\text{K}}$ experiments at the CERN SPS collected a large sample of charged kaon decays in flight. $\text{NA62}\text{-}{\text{R}_\text{K}}$ was running in 2007-08 with a highly efficient minimum bias trigger for decays into electrons. [...]
POS(HQL-2016)033; arXiv:1701.06979.- SISSA, 2016-11-23 - 11 p. - Published in : PoS HQL2016 (2017) 033 Fulltext: PDF; Preprint: PDF;
In : 13th International Conference on Heavy Quarks and Leptons, Blacksburg, Virginia, USA, 22 - 27 May 2016, pp.033
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4.
Search for long-lived scalar particles in $B^+ \to K^+ \chi (\mu^+\mu^-)$ decays / LHCb Collaboration
A search for a long-lived scalar particle $\chi$ is performed, looking for the decay ${B^+ \to K^+ \chi}$ with ${\chi \to \mu^+\mu^-}$ in $pp$ collision data corresponding to an integrated luminosity of $3\, {\rm fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $\sqrt{s}=7$ and 8$\,$TeV. This new scalar particle, predicted by Hidden Sector models, is assumed to have a narrow width. [...]
arXiv:1612.07818; CERN-EP-2016-302; LHCB-PAPER-2016-052.- 2017-04-14 - 9 p. - Published in : Phys. Rev. D 95 (2017) 071101 APS Open Access article: PDF; Figures: ZIP; Fulltext: arXiv:1612.07818 - PDF; 10.1103_PhysRevD.95.071101 - PDF; Supplementary information: ZIP; External link: Figures, tables and other information
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5.
Searches for lepton number violation and resonances in $K^{\pm} \rightarrow \pi\mu\mu$ decays / NA48/2 Collaboration
The NA48/2 experiment at CERN collected a large sample of charged kaon decays to final states with multiple charged particles in 2003--2004. A new upper limit on the rate of the lepton number violating decay $K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm}$ is reported: $\mathcal{B}(K^{\pm}\to\pi^{\mp}\mu^{\pm}\mu^{\pm})<8.6 \times 10^{-11}$ at 90% CL. [...]
arXiv:1612.04723; CERN-EP-2016-310.- Geneva : CERN, 2017-06-10 - 10 p. - Published in : Phys. Lett. B 769 (2017) 67-76 Article from SCOAP3: PDF; Fulltext: arXiv:1612.04723 - PDF; fermilab-pub-16-700-td - PDF;
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6.
Non-minimal quartic inflation in supersymmetric $SO(10)$ / Leontaris, George K. (CERN ; Ioannina U.) ; Okada, Nobuchika (Alabama U.) ; Shafi, Qaisar (Delaware U., Bartol Inst.)
We describe how quartic ($\lambda \phi^4$) inflation with non-minimal coupling to gravity is realized in realistic supersymmetric $SO(10)$ models. In a well-motivated example the $16-\overline{16}$ Higgs multiplets, which break $SO(10)$ to $SU(5)$ and yield masses for the right-handed neutrinos, provide the inflaton field $\phi$. [...]
arXiv:1611.10196.- 2017-02-10 - 4 p. - Published in : Phys. Lett. B 765 (2017) 256-259 Article from SCOAP3: PDF; Fulltext: PDF; External link: Preprint
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7.
Chaotic inflation in supergravity / Kawasaki, M
It is shown that chaotic inflation naturally takes place in the framework of supergravity if we assume hat the Kahler potential has a shift symmetry of the inflaton chiral multiplet and introduce a small breaking parameter..
2001
In : 30th International Conference on High-energy Physics, Osaka, Japan, 27 Jul - 2 Aug 2000, pp.994-7 (vol.2)
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8.
Kähler-curvature effects can solve the initial condition problem in inflation / Enqvist, Kari ; Nanopoulos, Dimitri V ; Papantonopoulos, E ; Tamvakis, Kyriakos
CERN-TH-4274-85.- Geneva : CERN, 1985 - 7 p. - Published in : Phys. Lett. B 166 (1985) 41-44 Fulltext: PDF; - CERN library copies
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9.
Inflation from a ripple on a vanishing potential / Enqvist, Kari ; Nanopoulos, Dimitri V ; Quirós, Mariano
CERN-TH-4145.- Geneva : CERN, 1985 - 14 p. - Published in : Phys. Lett. B 159 (1985) 249-255 Fulltext: PDF; - CERN library copies
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10.
Primordial two-component inflation / Enqvist, Kari ; Nanopoulos, Dimitri V
CERN-TH-3935.- Geneva : CERN, 1985 - 22 p. - Published in : Nucl. Phys. B 252 (1985) 508-522 Fulltext: PDF; - CERN library copies
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