118497313
Inflation in de Sitter spacetime and CMB large scale anomaly
The influence of cosmological constant-type dark energy in the early universe is investigated. This is accommodated by a new dispersion relation in de Sitter spacetime. We perform a global fit to explore the cosmological parameter space by using the CosmoMC package with the recently released Planck TT and WMAP polarization datasets. Using the results from the global fit, we compute a new CMB temperature temperature (TT) spectrum. The obtained TT spectrum has lower power compared with that based on the ACDM model at large scales.
123863059
Design and simulations for the detector based on DSSSD
The present paper describes the design and simulation results of a position-sensitive charged particle detector based on the Double Sided Silicon Strip Detector (DSSSD). Also, the characteristics of the DSSSD and its testing result were are discussed. With the application of the DSSSD, the position-sensitive charged particle detector can not only give particle flux and energy spectra information and identify different types of charged particles, but also measure the location and angle of incident particles. As the detector can make multiparameter measurements of charged particles, it is widely used in space detection and exploration missions, such as charged particle detection related to earthquakes, space environment monitoring and solar activity inspection.
123742975
Design and performance study of the LEPD silicon tracker onboard the CSES satellite
The low energy particle detector (LEPD) is one of the main payloads onboard the China seismic electromagnetic satellite (CSES). The detector is designed to ascertain space electrons (0.1–10 MeV) and protons (2–50 MeV). It has the capability of identifying the electrons and protons, to measure the energy spectrum and the incident angle of the particles. The LEPD is made up of a silicon tracker system, a CsI (Tl) mini-calorimeter, an anti-coincidence system made by plastic scintillator, as well as electronics and a data acquisition system (DAQ). The tracker is also a kind of ΔE-E telescope; it consists of two layers of double-sided silicon strip detectors (DSSD). The signals emerging from the silicon tracker can be read out by two pieces of application specific integrated circuit (ASIC), which also can generate an event trigger for the LEPD. The functions of the DSSD system in the LEPD for charged particles were tested by 241Am @5.486 MeV α particles. The results show that the DSSD system works well, and has high performance to detect charged particles and measure the position of incident particles.
128213646
A ug 2 01 0 Observation of an enhancement in
K.-F. Chen, W.-S. Hou, I. Adachi, H. Aihara, T. Aushev, 13 A. M. Bakich, V. Balagura, A. Bay, K. Belous, V. Bhardwaj, M. Bischofberger, A. Bondar, 32 A. Bozek, M. Bračko, J. Brodzicka, T. E. Browder, M.-C. Chang, P. Chang, Y. Chao, A. Chen, P. Chen, B. G. Cheon, C.-C. Chiang, R. Chistov, I.-S. Cho, Y. Choi, J. Dalseno, 41 A. Drutskoy, S. Eidelman, 32 D. Epifanov, 32 N. Gabyshev, 32 P. Goldenzweig, H. Ha, B.-Y. Han, K. Hayasaka, H. Hayashii, M. Hazumi, Y. Hoshi, Y. B. Hsiung, H. J. Hyun, T. Iijima, K. Inami, R. Itoh, M. Iwabuchi, Y. Iwasaki, T. Julius, D. H. Kah, J. H. Kang, N. Katayama, C. Kiesling, H. O. Kim, Y. I. Kim, Y. J. Kim, K. Kinoshita, B. R. Ko, S. Korpar, 14 P. Križan, 14 P. Krokovny, Y.-J. Kwon, S.-H. Kyeong, J. S. Lange, S.-H. Lee, J. Li, C. Liu, Y. Liu, D. Liventsev, R. Louvot, J. MacNaughton, A. Matyja, S. McOnie, K. Miyabayashi, H. Miyata, Y. Miyazaki, R. Mizuk, Y. Nagasaka, E. Nakano, M. Nakao, S. Nishida, K. Nishimura, O. Nitoh, T. Nozaki, S. Ogawa, T. Ohshima, S. Okuno, G. Pakhlova, H. Park, H. K. Park, R. Pestotnik, M. Petrič, L. E. Piilonen, S. Ryu, H. Sahoo, K. Sakai, Y. Sakai, O. Schneider, C. Schwanda, A. J. Schwartz, R. Seidl, K. Senyo, M. Shapkin, C. P. Shen, J.-G. Shiu, B. Shwartz, 32 P. Smerkol, A. Sokolov, E. Solovieva, S. Stanič, M. Starič, K. Sumisawa, T. Sumiyoshi, S. Suzuki, Y. Teramoto, K. Trabelsi, S. Uehara, T. Uglov, Y. Unno, S. Uno, Y. Ushiroda, G. Varner, K. E. Varvell, K. Vervink, C. H. Wang, M.-Z. Wang, P. Wang, Y. Watanabe, R. Wedd, J. Wicht, E. Won, B. D. Yabsley, Y. Yamashita, C. Z. Yuan, Z. P. Zhang, V. Zhulanov, 32 A. Zupanc, and O. Zyukova 32
119728121
Coulomb instability of hot nuclei in a chiral symmetry model
A chiral symmetry model for nuclear matter is extended to finite temperature and then used to study the Coulomb instability of hot nuclei. The role of the rho meson degree of freedom is discussed. The calculated limiting temperature is compared with the results obtained from other theories and experiments. [S0556-2813(99)05006-2].
119717624
Asymmetric nuclear matter at finite temperature and density
Asymmetric nuclear matter is studied by using an effective nuclear model in a mean-field approximation. The density, temperature, and asymmetric parameter dependence of the effective baryon mass is discussed. The liquid-gas phase transition of a system with two independent conserved charges (baryon number and isospin) is studied using the stability conditions on the free energy and Gibbs conditions for phase equilibrium. The critical temperature is calculated with and without $\ensuremath{\rho}$ meson contribution, respectively.
120509600
The Upper limit of the e+ e- partial width of X(3872)
Abstract The e + e − decay partial width of the recently observed state, X (3872), is estimated using the ISR data collected at s =4.03  GeV in e + e − annihilation experiment by BES at BEPC. It is found that Γ e + e − B π + π − J/ψ  eV at 90% C.L. if the J PC of X (3872) is 1 −− . Together with the potential models and other information, we conclude that X (3872) is very unlikely to be a vector state.
119450769
Isospin dependence of liquid–gas phase transition in hot asymmetric nuclear matter
Abstract By using the Furnstahl, Serot and Tang's model, the effect of density dependence of the effective nucleon–nucleon– ρ -meson (NN ρ ) coupling on the liquid–gas phase transition in hot asymmetric nuclear matter is investigated. A limit pressure p lim has been found. We found that the liquid–gas phase transition cannot take place if p > p lim . The binodal surface for density dependent NN ρ coupling situation is addressed.