Nuclear-matter modification of decay widths in the phi-->e+e- and phi-->K+K- channels.
Nuclear-matter modification of decay widths in the phi-->e+e- and phi-->K+K- channels.
复制标题
phi-->e e- 和 phi-->K K- 通道中衰变宽度的核物质修饰。
DOI:
10.1103/physrevlett.98.152302
复制
发表时间:
2006
影响因子:
8.6
通讯作者:
Y. Yoshimura
中科院分区:
文献类型:
--
作者:
F. Sakuma;J. Chiba;H. En’yo;Y. Fukao;H. Funahashi;H. Hamagaki;M. Ieiri;M. Ishino;H. Kanda;M. Kitaguchi;S. Mihara;K. Miwa;T. Miyashita;T. Murakami;R. Muto;T. Nakura;M. Naruki;K. Ozawa;O. Sasaki;M. Sekimoto;T. Tabaru;K. Tanaka;M. Togawa;S. Yamada;S. Yokkaichi;Y. Yoshimura
The invariant mass spectra of phi-->K+K- are measured in 12 GeV p+A reactions in order to search for the in-medium modification of phi mesons. The observed K+K- spectra are well reproduced by the relativistic Breit-Wigner function with a combinatorial background shape in three betagamma regions between 1.0 and 3.5. The nuclear mass number dependence of the yields of the K+K- decay channel is compared to the simultaneously measured e+e- decay channel for carbon and copper targets. We parameterize the production yields as sigma(A)=sigma0Aalpha and obtain alphaphi-->K+K- -alphaphi-->e+e- to be 0.14+/-0.12. Limits are obtained for the partial decay widths of the phi mesons in nuclear matter.
DOI:
--
发表时间:
2006
期刊:
Phys. Rev. C74
影响因子:
--
作者:
T.Sugitate;T.Sugitate;D.V.Aleksandrov 他;T.Sugitate;D.V.Aleksandrov et al.;F.Sakuma et al.;R.Muto et al.;S.Yokkaichi et al.;F.Sakuma et al.;R.Muto et al.;T.Tabaru et al.;M.Naruki et al.;R.Muto et al.;M.Naruki et al.;T.Tabaru et al.
通讯作者:
T.Tabaru et al.
DOI:
--
发表时间:
2007
期刊:
Phys. Rev. Lett. 98
影响因子:
--
作者:
T.Sugitate;T.Sugitate;D.V.Aleksandrov 他;T.Sugitate;D.V.Aleksandrov et al.;F.Sakuma et al.;R.Muto et al.;S.Yokkaichi et al.;F.Sakuma et al.;R.Muto et al.
通讯作者:
R.Muto et al.