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Search for S = +1 exotic baryon in t...

Guo, Lei.

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Search for S = +1 exotic baryon in the photon proton decaying to kaon-antikaon-positively charged pion (n) reaction.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Search for S = +1 exotic baryon in the photon proton decaying to kaon-antikaon-positively charged pion (n) reaction./
作者:	Guo, Lei.
面頁冊數:	147 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2466.
Contained By:	Dissertation Abstracts International65-05B.
標題:	Physics, Nuclear. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3132872
ISBN:	049680112X

Search for S = +1 exotic baryon in the photon proton decaying to kaon-antikaon-positively charged pion (n) reaction.
Guo, Lei.

Search for S = +1 exotic baryon in the photon proton decaying to kaon-antikaon-positively charged pion (n) reaction. - 147 p.

Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2466.

Thesis (Ph.D.)--Vanderbilt University, 2004.

The reaction gammap → pi+ k-k+ n has been investigated at Jefferson Lab using a tagged photon beam with an energy range of 3--5.47 GeV. A narrow baryon state with strangeness S = +1 and mass m = 1555 +/- 7 +/- 10 MeV/c 2 was observed in the nk+ invariant mass spectrum. The width of peak is consistent with the CLAS resolution (FWHM = 26 MeV/c2), and its statistical significance is 7.8 +/- 1.0 sigma. A baryon with positive strangeness has necessarily exotic structure and cannot be described in the framework of the naive constituent quark model. The signal is consistent with that predicted by a chiral soliton model for a 5-quark baryon state. Partial Wave Analysis was performed for the three-body mesonic background with the energy range of 4.8--5.47 GeV. The analysis demonstrates that the observed signal is unlikely to arise from meson production in the same final state. Interesting features were also observed in the 2-, 1- and 1 + partial wave intensity distributions. Due to the low statistics, the resonant nature of these meson waves is not determined.

ISBN: 049680112XSubjects--Topical Terms:

1019065
Physics, Nuclear.

Search for S = +1 exotic baryon in the photon proton decaying to kaon-antikaon-positively charged pion (n) reaction.
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502 $a Thesis (Ph.D.)--Vanderbilt University, 2004.
520 $a The reaction gammap → pi+ k-k+ n has been investigated at Jefferson Lab using a tagged photon beam with an energy range of 3--5.47 GeV. A narrow baryon state with strangeness S = +1 and mass m = 1555 +/- 7 +/- 10 MeV/c 2 was observed in the nk+ invariant mass spectrum. The width of peak is consistent with the CLAS resolution (FWHM = 26 MeV/c2), and its statistical significance is 7.8 +/- 1.0 sigma. A baryon with positive strangeness has necessarily exotic structure and cannot be described in the framework of the naive constituent quark model. The signal is consistent with that predicted by a chiral soliton model for a 5-quark baryon state. Partial Wave Analysis was performed for the three-body mesonic background with the energy range of 4.8--5.47 GeV. The analysis demonstrates that the observed signal is unlikely to arise from meson production in the same final state. Interesting features were also observed in the 2-, 1- and 1 + partial wave intensity distributions. Due to the low statistics, the resonant nature of these meson waves is not determined.
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