In this paper, we complete formulae for the elastic scattering cross section of general vector dark matter with nucleons in direct detection at leading order strong coupling constant α s , assuming that is composed particles and interacts heavy fermions color charge as well standard-model quark. As an application our formulae, first Kaluza-Klein photon minimal universal extra dimension model discussed. It found larger than those previous works by up to a factor ten.

We propose the <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>μ</a:mi><a:mo>−</a:mo></a:msup><a:mo stretchy="false">→</a:mo><a:msup><a:mi>e</a:mi><a:mo>−</a:mo></a:msup><a:mi>γ</a:mi></a:math> process in a muonic atom as novel means to investigate charged lepton flavor violation (CLFV). demonstrate its sensitivity probing effective CLFV operators associated with both single and double photon fields. In comparison <d:math...

Modification of standard big-bang nucleosynthesis is considered in the minimal supersymmetric model to resolve excessive theoretical prediction abundance primordial lithium 7. We focus on stau as a next-lightest superparticle, which long lived due its small mass difference with lightest superparticle. It provides number additional decay processes $^{7}\mathrm{Li}$ and $^{7}\mathrm{Be}$. A particularly important process internal conversion stau-nucleus bound state, destroys $^{7}\mathrm{Be}$...

The experimental sensitivity to $\mu \to e$ conversion on nuclei is set improve by four orders of magnitude in coming years. However, various operator coefficients add coherently the amplitude for conversion, weighted nucleus-dependent functions, and therefore event a detection, identifying relevant new physics scenarios could be difficult. Using representation nuclear targets as vectors coefficient space, whose components are weighting we quantify expectation that different give...

We study the stau lifetime in a scenario with LSP taken to be neutralino and NLSP being stau, based on minimal supersymmetric Standard Model. The mass difference between NLSP, $\ensuremath{\delta}m$, must satisfy $\ensuremath{\delta}m/{m}_{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}\ensuremath{\sim}$ few % or less for coannihilation occur, where ${m}_{\stackrel{\texttildelow{}}{\ensuremath{\chi}}}$ is mass. calculate from decay modes...

A scenario of the big-bang nucleosynthesis is analyzed within minimal supersymmetric standard model, which consistent with a stau-neutralino coannihilation to explain relic abundance dark matter. We find that we can account for possible discrepancy $^{7}\mathrm{Li}$ between observation and prediction by taking mass neutralino as 300 GeV difference stau $(100--120)\text{ }\text{ }\mathrm{MeV}$. therefore simultaneously matter these values parameters. The lifetime staus in this predicted be...

When the mass difference between lightest slepton, next to supersymmetric particle, and neutralino, is smaller than tau mass, lifetime of slepton increases in many orders magnitude with respect typical lifetimes other particles. These small differences are possible minimal standard model (MSSM) and, for instance, they correspond coannihilation region constrained MSSM ${M}_{1/2}\ensuremath{\gtrsim}700\text{ }\text{ }\mathrm{GeV}$. In a general gravity-mediated MSSM, where particle inversely...

Using the non-equilibrium Green function method (Kadanoff-Baym equations) in expanding universe, we investigate evolution of lepton number asymmetry when right-handed (RH) neutrinos have almost degenerate masses $$ |M_i^2-M_j^2| \ll M_i^2 . The resonantly enhanced CP-violating parameter ε i associated with decay RH neutrino N is obtained under an assumption that off-diagonal component Yukawa coupling smaller than diagonal one. It proportional to enhancement factor \left( {M_i^2-M_j^2}...

The relic abundance of the dark matter (DM) particle $d$ is studied in a secluded DM scenario, which number decreasing process dominantly occurs not through pair annihilation into standard model particles, but via $dd\ensuremath{\rightarrow}mm$ scattering with subsequently decaying mediator $m$. It pointed out that cosmologically observed can be accomplished even massive having mass ${m}_{m}$ non-negligibly heavy compared ${m}_{d}$. In degenerated $d\ensuremath{-}m$ case (${m}_{d}={m}_{m}$),...

We propose a new process of mu(-) e(-) -> in muonic atom for quest charged lepton flavor violation. The Coulomb attraction from the nucleus heavy leads to significant enhancement its rate, compared mu(+) e(+) e(-). upper limit branching ratio is estimated be orders O[10^(-17)-10^(-18)] photonic and four Fermi interactions present experimental constraints. search this could serve complementarily with other relevant processes shed lights upon nature

Background Sphingolipids, e.g. ceramide (Cer), glucosylceramide (GlcCer) and sphingomyelin (SM), are important bulk constituents of plasma membranes in mammalian cells. In addition, these lipids also enriched certain intracellular organelles, as well the epidermal lamellar bodies (LBs) differentiating keratinocytes (KCs). Epidermal Cer, which comprises a heterogeneous family at least 10 members, is key component stratum corneum (SC) lipids, regulates permeability barrier function. Levels...

We calculate the relic density of stau at beginning Big-Bang Nucleosynthesis (BBN) era in coannihilation scenario minimal supersymmetric standard model (MSSM). In this scenario, can be long-lived and form bound states with nuclei. put constraints on parameter space MSSM by connecting calculation to observation light elements abundance, which strongly depends stau. Consistency between theoretical prediction observational result, both dark matter abundance requires mass difference lighter...

We study implications of two dark matter candidate events at CDMS-II on the neutralino scenario in supersymmetric standard model, light recent lattice simulation strange quark content a nucleon. The scattering rate neutralino-nucleon is dominated by Higgs exchange processes and mass heavy boson predicted for Bino-Higgsino mixing state. In case Wino-Higgsino mixing, sector may not be constrained.

Contact interactions of a muon, an electron and two photons can contribute to the decay $\mu \to e \gamma \gamma$, but also conversion muon into in electric field nucleus. We calculate e$ rate, show that for coefficients operators involving combination $FF \propto |\vec{E}|^2$ (as opposed $F\tilde{F} \vec{E} \cdot \vec{B}$), current bound on is more sensitive than \gamma$.

Relic abundance of dark matter is investigated in the framework universal extra dimension models with right-handed neutrinos. These are free from serious Kaluza-Klein (KK) graviton problem that original model has. The first KK particle neutrino a candidate for this framework, and its relic determined by three processes, (1) decay photon into late universe, (2) production thermal bath early (3) higher neutrinos universe. When ordinary masses large enough such as degenerate mass spectrum case,...

We calculate the production rates of second Kaluza-Klein (KK) photon ${\ensuremath{\gamma}}^{(2)}$ and $Z$ boson ${Z}^{(2)}$ at LHC including all significant processes in minimal universal extra dimension (MUED) model. For discrimination MUED model from other TeV scale models LHC, play a crucial role. In order to discuss their rates, we derive KK number violating operators contribution top Yukawa coupling. Using these operators, accurately branching ratios particles. addition find that...

We propose helium-4 spallation processes induced by long-lived stau in supersymmetric standard models, and investigate an impact of the on light elements abundances. show that, as long phase space is open, they are more important than stau-catalyzed fusion hence constrain property.

We explore the coannihilation region of constrained minimal supersymmetric standard model (CMSSM) being consistent with current experimental/observational results. The requirements from results are 125 GeV Higgs boson mass and relic abundances both dark matter light elements, especially lithium-7. put these on calculated values, and, thus, we obtain allowed region. Then give predictions to spectra (SUSY) particles, anomalous magnetic moment muon, branching fractions $B$-meson rare decays,...

We discuss the $μ$-$e$ transition processes induced by non-holomorphic Yukawa interactions in minimal supersymmetric standard model (MSSM). When supersymmetry is broken, coupling structures between Higgs doublets and leptons are modified flavor-changing neutral currents could be generated. In framework of MSSM, we calculate those effects to rates for $\meg$, $\meee$, conversion nuclei. perform more detailed calculations lepton flavor violating (LFV) operators heavy decoupling limit than...

We revisit charged lepton flavor violating (CLFV) scattering processes $\ell_{i} N \to \tau X \, (\ell_{i} \ni e, \mu)$ mediated by Higgs. point out that a new subprocess g g$ via the effective interactions of Higgs and gluon gives dominant contribution to X$ for an incident beam energy $E_{\ell} \lesssim 1\,\text{TeV}$ in fixed target experiments. Furthermore, light quark number conservation, we consider pair-production q \bar{q}$ ($q$ denotes quarks) instead q$. This corrects threshold...

Studies of the charged lepton flavor violating process ${\ensuremath{\mu}}^{\ensuremath{-}}{e}^{\ensuremath{-}}\ensuremath{\rightarrow}{e}^{\ensuremath{-}}{e}^{\ensuremath{-}}$ in muonic atoms by four Fermi interaction [Y. Uesaka et al., Phys. Rev. D 93, 076006 (2016)] are extended to include photonic interaction. The wave functions a muon and electrons obtained solving Dirac equation with Coulomb finite nuclear charge distribution. We find suppression rate over initial estimation for...

The charged lepton flavor violating (CLFV) processes of $\mu^-e^-\rightarrow e^-e^-$ decay by four Fermi contact interactions in a muonic atom for various atoms are investigated. wave functions bound and scattering state leptons properly treated solving Dirac equations with Coulomb interaction the finite nuclear charge distributions. This new effect contributes significantly particular heavier atoms, where obtained rate is about one order magnitude larger than previous estimation $^{208}$Pb....