125881447
The neutrino mass and the periodicity of the neutrino burst from SN1987A
121855913
Possibility to Detect Upgoing Sleptons
Some supersymmetric models predict long lived charged sleptons. If they are exist, the τ ˜ , the supersymmetry partner of τ lepton, could be produced inside the earth by collisions of high energy neutrinos with nucleons. The possible signals of upgoing τ ˜ have been studied in various ways. Taking the atmospheric neutrino flux into account, the muon flux as main background is also estimated. By using the Waxman-Bahcall limit on the extraterrestrial neutrino flux, the resultant spectra show that there are about 70 events per year passing a km-scale underground experiment, such as ICECUBE.
117504817
The X-ray spectra and XUV excess of some AGNs.
115136998
Search for a Muon Flux Enhancement During the Solar Flare of 14 July 2000 with the L3+C Data
The solar slare of the 14 July 2000 offers a unique opportunity for the L3+C experiment at CERN to search for a correlated enhancement in the flux of muons using the precision spectrometer. The search for a directional excess in the flux of muons between 15 and 25 GeV, corresponding to primary proton energies above 40 GeV, is presented. We report an excess with a chance probability of 2.7 · 10−3 at a time coincident with the peak increase of solar protons observed with neutron monitors and satellites. At higher energies no significant signal has been observed up to 1.5 hours after the Solar flare time.
120406708
Analysis methods for results in gamma-ray astronomy
118365916
Geminga Pulsar in Cos-B and Heao-B Observations
119111477
Baryonic Matter in the Hidden Local Symmetry Induced from Holographic QCD Models
Baryonic matter is studied in the Skyrme model by taking into account the roles of $\pi,$ $\rho$, and $\omega$ mesons through the hidden local symmetry up to $\mathcal{O}(p^4)$ terms including the homogeneous Wess-Zumino (hWZ) terms. Using the master formulas for the low energy constants derived from holographic QCD models the skyrmion matter properties can be quantitatively calculated with the input values of the pion decay constant $f_\pi$ and the vector meson mass $m_\rho^{}$. We find that the hWZ terms are responsible for the repulsive interactions of the $\omega$ meson. In addition, the self-consistently included $\mathcal{O}(p^4)$ terms with the hWZ terms is found to increase the half skyrmion phase transition point above the normal nucleon density.
121260659
Open and hidden charm hadronic molecules
Properties of some open and hidden charm exotic states which have been studied using the composite model are summarized. It is found that, their decay properties are consistent with the data and further data are necessary to discriminate the hadronic molecular interpretation from other interpretations.
119280184
$D$ and $D^{\ast}$ meson mixing in spin-isospin correlated cold nuclear matter
We propose to study the mass spectrum of the heavy-light mesons to probe the structure of the spin-isospin correlation in the nuclear medium. We point out that the spin-isospin correlation in the nuclear medium generates a mixing among the heavy-light mesons carrying different spins and isospins such as $D^+$, $D^0$, $D^{\ast +}$, and $D^{\ast 0}$ mesons. We use two types of correlations motivated by the skyrmion crystal and the chiral density wave as typical examples to obtain the mass splitting caused by the mixing. Our result shows that the structure of the mixing reflects the pattern of the correlation, i.e., the remaining symmetry. Furthermore, the magnitude of the mass modification provides information of the strength of the correlation.
59430684
Chiral partner structure of heavy baryons from the bound state approach with hidden local symmetry
The chiral partner structure of heavy baryons is studied using the bound state approach by binding the heavy-light mesons to the nucleon as the soliton in an effective Lagrangian for the pseudoscalar and vector mesons based on hidden local symmetry. In the heavy-light meson sector, we regard the $H$ doublet and $G$ doublet as chiral partners and couple them to light mesons with a minimal derivative. We find that the chiral partner of ${\ensuremath{\Lambda}}_{c}(\frac{1}{2}\genfrac{}{}{0}{}{{}^{+}}{},2286)$ is the ${\ensuremath{\Lambda}}_{c}(\frac{1}{2}\genfrac{}{}{0}{}{{}^{\ensuremath{-}}}{},\frac{3}{2}\genfrac{}{}{0}{}{{}^{\ensuremath{-}}}{})$ heavy quark doublet with a mass of about 3.1 GeV but not (${\ensuremath{\Lambda}}_{c}(\frac{1}{2}\genfrac{}{}{0}{}{{}^{\ensuremath{-}}}{},2595)$, ${\ensuremath{\Lambda}}_{c}(\frac{3}{2}\genfrac{}{}{0}{}{{}^{\ensuremath{-}}}{},2625)$), which might be interpreted as an orbital excitation of ${\ensuremath{\Lambda}}_{c}(\frac{1}{2}\genfrac{}{}{0}{}{{}^{+}}{},2286)$. The same model is applied to the bottom sector, and the chiral partner of ${\ensuremath{\Lambda}}_{b}(\frac{1}{2}\genfrac{}{}{0}{}{{}^{+}}{},5625)$ is shown to have a mass of about 6.5 GeV. We also discuss the chiral partner structures for the isospin vector heavy baryons. For the pentaquark states, we find that the masses of the pentaquark state made of a ground state heavy-light meson and its chiral partner are similar, and both of them are below the $Dp$ threshold, which therefore cannot be ruled out by the present data.
119262831
Properties of X(3872) as a hadronic molecule with a negative parity
We discuss the possible interpretation of X(3872) as a DD ∗ hadronic molecule with J PC = 2 −+ . Using the phenomenological Lagrangian approach, we studied its radiative and strong decay properties. We find that our model with about 97.6% isospin zero component explains the existing data nicely. We predict the partial widths of the radiative and strong decays of X(3872) and show that the measurement of the ratio B(X(3872) → �c0�0)/B(X(3872) → �c1�0) may signal the nature of X(3872).