Zobrazeno 1 - 10
of 455
pro vyhledávání: '"Miyama M"'
Autor:
Bonnefoy, M., Currie, T., Marleau, G. -D., Schlieder, J. E., Wisniewski, J., Carson, J., Covey, K. R., Henning, T., Biller, B., Hinz, P., Klahr, H., Boyer, A. N. Marsh, Zimmerman, N., Janson, M., McElwain, M., Mordasini, C., Skemer, A., Bailey, V., Defrère, D., Thalmann, C., Skrutskie, M., Allard, F., Homeier, D., Tamura, M., Feldt, M., Cumming, A., Grady, C., Brandner, W., Kandori, R., Kuzuhara, M., Fukagawa, M., Kwon, J., Kudo, T., Hashimoto, J., Kusakabe, N., Abe, L., Brandt, T., Egner, S., Guyon, O., Hayano, Y., Hayashi, M., Hayashi, S., Hodapp, K., Ishii, M., Iye, M., Knapp, G., Matsuo, T., Mede, K., Miyama, M., Morino, J. -I., Moro-Martin, A., Nishimura, T., Pyo, T., Serabyn, E., Suenaga, T., Suto, H., Suzuki, R., Takahashi, Takami, M., Takato, N., Terada, H., Tomono, D., Turner, E., Watanabe, M., Yamada, T., Takami, H., Usuda, T.
We previously reported the direct detection of a low mass companion at a projected separation of 55+-2 AU around the B9 type star {\kappa} Andromedae. The properties of the system (mass ratio, separation) make it a benchmark for the understanding of
Externí odkaz:
http://arxiv.org/abs/1308.3859
Autor:
Kumano, S., Miyama, M.
Publikováno v:
Phys.Rev. D65 (2002) 034012
Flavor asymmetry is investigated in polarized light-antiquark distributions by a meson-cloud model. In particular, rho meson contributions to Delta u-bar - Delta d-bar are calculated. We point out that the g_2 part of rho contributes to the structure
Externí odkaz:
http://arxiv.org/abs/hep-ph/0110097
Optimum nuclear parton distributions are determined by an analysis of muon and electron deep inelastic scattering data. Assuming simple A dependence and polynomial functions of x and 1-x for nuclear modification of parton distributions, we determine
Externí odkaz:
http://arxiv.org/abs/hep-ph/0106297
Publikováno v:
Pramana 57:445-458,2001
Optimum nuclear parton distributions are obtained by analyzing available experimental data on electron and muon deep inelastic scattering (DIS). The distributions are given at Q^2=1 GeV^2 with a number of parameters, which are determined by a chi^2 a
Externí odkaz:
http://arxiv.org/abs/hep-ph/0103238
Publikováno v:
Phys.Rev. D64 (2001) 034003
Parametrization of nuclear parton distributions is investigated in the leading order of alpha_s. The parton distributions are provided at Q^2=1 GeV^2 with a number of parameters, which are determined by a chi^2 analysis of the data on nuclear structu
Externí odkaz:
http://arxiv.org/abs/hep-ph/0103208
We study parametrization of polarized parton distribution functions in the \alpha_s leading order (LO) and in the next-to-leading order (NLO). From \chi^2 fitting to the experimental data on A_1, optimum polarized distribution functions are determine
Externí odkaz:
http://arxiv.org/abs/hep-ph/0012280
Autor:
Miyama, M.
Publikováno v:
RIKEN Rev. 28 (2000) 50-54
We discuss the Drell-Yan proton-deuteron (p-d) asymmetry R_{pd}, which is defined by the proton-proton and proton-deuteron cross-section ratio \Delta_{(T)}\sigma^{pd}/2\Delta_{(T)}\sigma^{pp}, and its relation to the polarized light-antiquark flavor
Externí odkaz:
http://arxiv.org/abs/hep-ph/0001078
Autor:
Goto, Y., Hayashi, N., Hirai, M., Horikawa, H., Kumano, S., Miyama, M., Morii, T., Saito, N., Shibata, T. -A., Taniguchi, E., Yamanishi, T.
Publikováno v:
Phys.Rev.D62:034017,2000
Polarized parton distribution functions are determined by using world data from the longitudinally polarized deep inelastic scattering experiments. A new parametrization of the parton distribution functions is adopted by taking into account the posit
Externí odkaz:
http://arxiv.org/abs/hep-ph/0001046
Autor:
Kumano, S., Miyama, M.
Publikováno v:
Phys.Lett. B479 (2000) 149-155
We discuss the relation between the ratio of the proton-deuteron (pd) Drell-Yan cross section to the proton-proton (pp) one \Delta_{(T)} \sigma_{pd}/2 \Delta_{(T)} \sigma_{pp} and the flavor asymmetry in polarized light-antiquark distributions. Using
Externí odkaz:
http://arxiv.org/abs/hep-ph/9909432
Autor:
Miyama, M.
Publikováno v:
Nucl.Phys.Proc.Suppl. 79 (1999) 620
We discuss transversity distributions and Drell-Yan transverse double spin asymmetries. First, the antiquark flavor asymmetry $\Delta_{_T} \bar u/\Delta_{_T} \bar d$ is discussed by using two different descriptions, a meson-cloud model and a Pauli ex
Externí odkaz:
http://arxiv.org/abs/hep-ph/9905559