Diffractive phi-meson photoproduction on proton near threshold

Diffractive phi-meson photoproduction on proton near threshold
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DOI：
10.1103/physrevlett.95.182001
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发表时间：
2005-06
期刊：
Physical Review Letters
影响因子：
8.6
通讯作者：
T. Mibe;T. Mibe;We-Fu Chang;T. Nakano;D. S. Ahn;D. S. Ahn;J. Ahn;H. Akimune;Y. Asano;S. Daté;H. Ejiri;H. Fujimura;M. Fujiwara;M. Fujiwara;K. Hicks;T. Hotta;K. Imai;Takatsugu Ishikawa;T. Iwata;H. Kawai;Z. Kim;K. Kino;H. Kohri;N. Kumagai;S. Makino;T. Matsuda;T. Matsumura;T. Matsumura;N. Matsuoka;K. Miwa;M. Miyabe;Y. Miyachi;M. Morita;N. Muramatsu;M. Niiyama;M. Nomachi;Y. Ohashi;T. Ooba;H. Ohkuma;D. Oshuev;C. Rangacharyulu;A. Sakaguchi;T. Sasaki;P. Shagin;Y. Shiino;H. Shimizu;Y. Sugaya;Y. Sugaya;M. Sumihama;M. Sumihama;A. Titov;Y. Toi;H. Toyokawa;A. Wakai;Chun-Chieh Wang;S. C. Wang;K. Yonehara;T. Yorita;M. Yoshimura;M. Yosoi;R. Zegers
T. Mibe;T. Mibe;We-Fu Chang;T. Nakano;D. S. Ahn;D. S. Ahn;J. Ahn;H. Akimune;Y. Asano;S. Daté;H. Ejiri;H. Fujimura;M. Fujiwara;M. Fujiwara;K. Hicks;T. Hotta;K. Imai;Takatsugu Ishikawa;T. Iwata;H. Kawai;Z. Kim;K. Kino;H. Kohri;N. Kumagai;S. Makino;T. Matsuda;T. Matsumura;T. Matsumura;N. Matsuoka;K. Miwa;M. Miyabe;Y. Miyachi;M. Morita;N. Muramatsu;M. Niiyama;M. Nomachi;Y. Ohashi;T. Ooba;H. Ohkuma;D. Oshuev;C. Rangacharyulu;A. Sakaguchi;T. Sasaki;P. Shagin;Y. Shiino;H. Shimizu;Y. Sugaya;Y. Sugaya;M. Sumihama;M. Sumihama;A. Titov;Y. Toi;H. Toyokawa;A. Wakai;Chun-Chieh Wang;S. C. Wang;K. Yonehara;T. Yorita;M. Yoshimura;M. Yosoi;R. Zegers
中科院分区：
物理与天体物理1区
文献类型：
--
作者：
T. Mibe;T. Mibe;We-Fu Chang;T. Nakano;D. S. Ahn;D. S. Ahn;J. Ahn;H. Akimune;Y. Asano;S. Daté;H. Ejiri;H. Fujimura;M. Fujiwara;M. Fujiwara;K. Hicks;T. Hotta;K. Imai;Takatsugu Ishikawa;T. Iwata;H. Kawai;Z. Kim;K. Kino;H. Kohri;N. Kumagai;S. Makino;T. Matsuda;T. Matsumura;T. Matsumura;N. Matsuoka;K. Miwa;M. Miyabe;Y. Miyachi;M. Morita;N. Muramatsu;M. Niiyama;M. Nomachi;Y. Ohashi;T. Ooba;H. Ohkuma;D. Oshuev;C. Rangacharyulu;A. Sakaguchi;T. Sasaki;P. Shagin;Y. Shiino;H. Shimizu;Y. Sugaya;Y. Sugaya;M. Sumihama;M. Sumihama;A. Titov;Y. Toi;H. Toyokawa;A. Wakai;Chun-Chieh Wang;S. C. Wang;K. Yonehara;T. Yorita;M. Yoshimura;M. Yosoi;R. Zegers

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通过在低能量区域中从阈值到 E{sub{gamma}}=2.37GeV 的前向角的线性偏振光子，研究了质子上 {phi} 介子的光产生。 t=-vertical bar tvertical bar{sub min}处的微分截面并不随着E{sub {gamma}}的增加而平滑增加，而是在2.0 GeV附近显示出局部最大值。角分布表明，{phi} 介子主要是由螺旋性守恒过程光产生的，局部最大值不太可能是由于非自然宇称过程造成的。
Photoproduction of a {phi} meson on protons was studied by means of linearly polarized photons at forward angles in the low-energy region from threshold to E{sub {gamma}}=2.37 GeV. The differential cross sections at t=- vertical bar t vertical bar{sub min} do not increase smoothly as E{sub {gamma}} increases but show a local maximum at around 2.0 GeV. The angular distributions demonstrate that {phi} mesons are photoproduced predominantly by helicity-conserving processes, and the local maximum is not likely due to unnatural-parity processes.