The observed value of the Higgs boson mass indicates that potential becomes small and flat at scale around ${10}^{17}\text{ }\text{ }\mathrm{GeV}$. Having this fact in mind, we reconsider inflation scenario proposed by Bezrukov Shaposhnikov. It turns out nonminimal coupling $\ensuremath{\xi}$ squared to Ricci scalar can be smaller than 10. For example, $\ensuremath{\xi}=7$ corresponds tensor-to-scalar ratio $r\ensuremath{\simeq}0.2$, which is consistent with recent observation BICEP2.

We study theoretical aspects of rotating black hole production and evaporation in extra dimension scenarios with TeV scale gravity, within the mass range which higher dimensional Kerr solution provides a good description. evaluate cross section holes, taking their angular momenta into account. find that it becomes larger than Schwarzschild radius squared, is conventionally utilized literature, our result nicely agrees recent numerical by Yoshino Nambu few percent error for case. In same...

The observed Higgs mass ${M}_{H}=125.9\ifmmode\pm\else\textpm\fi{}0.4\text{ }\text{ }\mathrm{GeV}$ leads to the criticality of standard model, that is, potential becomes flat around scale $1{0}^{17--18}\text{ for top 171.3 GeV. Earlier we proposed a inflation scenario in which this plays crucial role. In paper, investigate detailed cosmological predictions light latest Planck and BICEP2 results. We also consider portal scalar dark matter compute one-loop effective with two-loop...

Superheavy dark matter may show its presence in high energy neutrino signals detected on earth. From the latest results of IceCube, we could set strongest lower bound lifetime beyond 100 TeV around $10^{28} {\rm sec}$. The excess a PeV is noticed and be interpreted as first signal DM even though further confirmation dedicated searches are invited.

Abstract We study reheating of inflationary models with general non-minimal coupling K (ϕ) R ∼ √( V (ϕ)) where is the Ricci scalar and inflaton potential. In particular, when we take monomial potential ∝ ϕ m ∈ℤ + , provide analytic expressions for cosmological observables. consider a wide range ξ∈[0,∞) in metric Palatini formalisms derive predictions observables temperature taking equation state parameter w reh .

Recently a weak X-ray emission around Eγ≃3.5keV was detected in the Andromeda galaxy and various clusters including Perseus cluster but its source has been unidentified. Axino, superpartner of axion, with mass 2Eγ is suggested as possible origin line R-parity violating decay into photon neutrino. Moreover, most parameter space consistent recent observation by BICEP2 experiment.

It has been argued that the mixed Higgs-$R^2$ model acts as UV extension of Higgs inflation, pushing up its cut-off scale in vacuum close to Planck scale. In this letter, we study inflaton oscillation stage after focusing on effective mass phase direction field, which can cause a violent preheating process. We find "spikes" observed inflation still appear model. While spikes above Higgs-only case, they below when is extended with $R^2$ term though reheating cannot be completed particle...

The recently reported excess in XENON1T is explained by new leptonic forces, which are free from gauge anomalies. We focus on two scenarios with and without dark matter. In Scenario #1, the boson of gauged lepton number U(1)Le−Lj, j=μ or τ provides non-standard interaction between solar neutrino electron that enhances recoil events detector. Scenarino #2, exclusively couples to matter, then cosmic-ray electrons can transfer their momenta matter halo. boosted generates signals O(1) keV. aided...

We investigate the sensitivity of Higgs(-like) inflation to higher dimensional operators in nonminimal couplings and potential, both metric Palatini formalisms. find that, while inflationary predictions are relatively stable against around attractor point formalism, they extremely sensitive one: for latter, spoiled by $|\xi_4| \gtrsim 10^{-6}$ $(\xi_2 \phi^2 + \xi_4 \phi^4 \cdots)R$, or $|\lambda_6| 10^{-16}$ Jordan-frame potential $\lambda_4 \lambda_6 \phi^6 \cdots$ (both Planck units)....

The observed neutrino oscillation data might be explained by new physics at a TeV scale, which is testable in the future experiments. Among various possibilities, low-energy Higgs triplet model prime candidate of such since it predicts clean signatures lepton flavor violating processes directly related to masses and mixing. It discussed how mass patterns can discriminated examining decays charged leptons as well collider doubly boson model.

This is the sequel to first paper of series, where we have discussed Hawking radiation from five-dimensional rotating black holes for spin 0, $1/2$, and 1 brane fields in low frequency regime. We consider emission a brane-localized scalar field general space-time dimensions without relying on expansions.

A non-motile, rod-shaped bacterium, designated strain WPCB133(T), was isolated from freshwater collected the Woopo wetland (Republic of Korea). Cells were Gram-reaction-negative, aerobic and catalase- oxidase-positive. The major fatty acids iso-C(15 : 0) anteiso-C(15 0). contained MK-7 as isoprenoid quinone. DNA G+C content 47 mol%. phylogenetic tree based on 16S rRNA gene sequences showed that WPCB133(T) forms an independent lineage within genus Mucilaginibacter. Strain distantly related to...

Inflationary scenarios based on simple non-minimal coupling aϕ2R and its generalizations are studied. Generalizing the form of to K(ϕ)R with an arbitrary function K(ϕ), we show that flat potential is still obtainable when V (ϕ)/K2(ϕ) asymptotically constant. Very interestingly, if ratio dimensionless self-coupling constant (λ) inflaton field (a) small, , cosmological observables for general monomial cases (K∼aϕm, V∼λϕ2m) in good agreement recent observational data.

Motivated by the recent observation of high energy electron and positron excesses in cosmic ray PAMELA ATIC/PPB-BETS, we suggest an anomaly-free scenario for universal extra dimension that localizes SM quarks splits spectrum KK from leptons. When are "well localized" at boundaries, most stringent bound model ($1/R > 510$ GeV) comes resonance search Tevatron dijet channels. Even early stage LHC, one can discover second gluon masses up to 4 TeV.

Updated LHC data on the new 126 GeV boson during 7 and 8 TeV runnings strengthen standard model Higgs interpretation further. Through global χ 2 fit analysis, we investigate whether particle could be one of scalar particles in two doublet models. Four types (I, II, X Y) are comprehensively studied. Considering recent analysis spin-parity boson, take scenarios: it is either lighter CP-even or heavier one. It found that current constrain quite strongly. Only narrow region along decoupling line...

We single out the Starobinsky model and its extensions among generic f(R) gravity as attractors at large field values for chaotic inflation. Treating a R3 curvature term perturbation of model, we impose phenomenological bounds on additional satisfying successful inflationary predictions. find that scalar spectral index can vary in both red or blue tilted direction, depending sign coefficient term, whereas tensor-to-scalar ratio is less affected Planck-compatible region. also discuss role...

A bstract We employ the effective field theory approach to analyze characteristics of Euclidean wormholes within axion theories. Using this approach, we obtain non-perturbative instantons in various complex scalar models with and without a non-minimal coupling gravity, as well featuring R 2 term for range values. This yields series analytical expressions wormhole action, shedding light on model parameters dependencies contributions both ultraviolet infrared domains. Consequently,...

Penrose's Strong Cosmic Censorship conjecture safeguards determinism in General Relativity. Within the initial value approach to Relativity, proof of preservation is predicated on unique evolution metric. For Kerr-Newman family black hole solutions, this requires inextendability metric past Cauchy horizon, due development a "blue-shift" instability. Attempts provide rigorous mathematical has led formulation several conjectures varying strengths, which seem be discussed rarely outside...

A bstract Non-perturbative gravitational effects induce explicit global symmetry breaking terms within axion models. These exponentially suppressed in the potential give a mass contribution to axion-like particles (ALPs). In this work we investigate scenario with scalar field charged under U(1) and having non-minimal coupling gravity. Given exponential dependence, ALP can retain spanning wide range, which act as dark matter component. We specify pre-inflationary post-inflationary production...

TeV scale gravity scenario predicts that the black hole production dominates over all other interactions above and Large Hadron Collider will be a factory. Such higher-dimensional holes mainly decay into standard model fields via Hawking radiation whose spectrum can computed from greybody factor. Here we complete series of our work by showing factors resultant spectra for brane-localized spinor vector field emissions arbitrary frequencies. Combining these results with previous works,...

We present a possible explanation of the recently observed 511 keV $\ensuremath{\gamma}$-ray anomaly with new ``millicharged'' fermion. The fermion is light [$\mathcal{O}(\mathrm{MeV})$] but has never been by any collider experiments mainly because its tiny electromagnetic charge $\ensuremath{\epsilon}e$. show that constraints from relic density in Universe and allow parameter range such cosmic emission galactic bulge may be due to positron production this millicharged