Search for the {theta}{sup +} via the K{sup +}p{yields}{pi}{sup +}X reaction with a 1.2 GeV/c K{sup +} beam

The {theta}{sup +} was searched for via the K{sup +}p{yields}{pi}{sup +}X reaction using the 1.2 GeV/c K{sup +} beam at the K6 beam line of the KEK-PS 12 GeV Proton Synchrotron. In the missing mass spectrum of the K{sup +}p{yields}{pi}{sup +}X reaction, no clear peak structure was observed. Therefor...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2008-04, Vol.77 (4)
Main Authors: Miwa, K., Dairaku, S., Fujimura, H., Funahashi, H., Hayata, M., Imai, K., Kamigaito, S., Miyabe, M., Niiyama, M., Saito, N., Seki, Y., Senzaka, K., Shoji, K., Nakajima, D., Fujioka, H., Maruta, T., Takahashi, T. N., Ajimura, S., Arvieux, J., Fukuda, T.
Format: Article
Language:English
Subjects:
BEAMS
COUPLING CONSTANTS
DIFFERENTIAL CROSS SECTIONS
GEV RANGE 01-10
JAPANESE ORGANIZATIONS
KAONS PLUS
KEK SYNCHROTRON
MISSING-MASS SPECTRA
PEAKS
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
PROTONS
SYNCHROTRONS
T CHANNEL
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Summary:The {theta}{sup +} was searched for via the K{sup +}p{yields}{pi}{sup +}X reaction using the 1.2 GeV/c K{sup +} beam at the K6 beam line of the KEK-PS 12 GeV Proton Synchrotron. In the missing mass spectrum of the K{sup +}p{yields}{pi}{sup +}X reaction, no clear peak structure was observed. Therefore a 90% C.L. upper limit of 3.5 {mu}b/sr was derived for the differential cross section averaged over 2 deg. to 22 deg. in the laboratory frame of the K{sup +}p{yields}{pi}{sup +}{theta}{sup +} reaction. This upper limit is much smaller than the theoretical calculation for the t-channel process where a K{sup 0}* is exchanged. From the present result, either the t-channel process is excluded or the coupling constant of g{sub K*N{theta}} is quite small.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.77.045203