Search for the Theta+ Pentaquark in the gammad--> DeltanK+ reaction measured with the CLAS spectrometer.

Niccolai, S; Mirazita, M; Rossi, P; Baltzell, N A; Carman, D S; Hicks, K; McKinnon, B; Mibe, T; Stepanyan, S; Tedeschi, D J; Adams, G; Ambrozewicz, P; Anefalos Pereira, S; Anghinolfi, M; Asryan, G; Avakian, H; Bagdasaryan, H; Baillie, N; Ball, J P; Batourine, V; Battaglieri, M; Bedlinskiy, I; Bektasoglu, M; Bellis, M; Benmouna, N; Berman, B L; Biselli, A S; Boiarinov, S; Bouchigny, S; Bradford, R; Branford, D; Briscoe, W J; Brooks, W K; Bültmann, S; Burkert, V D; Butuceanu, C; Calarco, J R; Careccia, S L; Carnahan, B; Chen, S; Cole, P L; Collins, P; Coltharp, P; Crabb, D; Crannell, H; Crede, V; Cummings, J P; Dashyan, N; Degtyarenko, P V; De Masi, R

Niccolai, S; Mirazita, M; Rossi, P; Baltzell, N A; Carman, D S; Hicks, K; McKinnon, B; Mibe, T; Stepanyan, S; Tedeschi, D J; Adams, G; Ambrozewicz, P; Anefalos Pereira, S; Anghinolfi, M; Asryan, G; Avakian, H; Bagdasaryan, H; Baillie, N; Ball, J P; Batourine, V; Battaglieri, M; Bedlinskiy, I; Bektasoglu, M; Bellis, M; Benmouna, N; Berman, B L; Biselli, A S; Boiarinov, S; Bouchigny, S; Bradford, R; Branford, D; Briscoe, W J; Brooks, W K; Bültmann, S; Burkert, V D; Butuceanu, C; Calarco, J R; Careccia, S L; Carnahan, B; Chen, S; Cole, P L; Collins, P; Coltharp, P; Crabb, D; Crannell, H; Crede, V; Cummings, J P; Dashyan, N; Degtyarenko, P V; De Masi, R.

Affiliation

Niccolai S; Institut de Physique Nucléaire, Orsay, France.

Phys Rev Lett ; 97(3): 032001, 2006 Jul 21.

Article in En | MEDLINE | ID: mdl-16907494

ABSTRACT

ABSTRACT

For the first time, the reaction gammad-->DeltanK+ has been analyzed in order to search for the exotic pentaquark baryon Theta+(1540). The data were taken at Jefferson Laboratory, using the Hall-B tagged-photon beam of energy between 0.8 and 3.6 GeV and the CEBAF Large Acceptance Spectrometer (CLAS). No statistically significant structures were observed in the nK+ invariant-mass distribution. The upper limit on the gammad-->DeltaTheta+ integrated cross section has been calculated and found to be between 5 and 25 nb, depending on the production model assumed. The upper limit on the differential cross section is also reported.

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Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2006 Document type: Article Affiliation country: Francia

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Collection: 01-internacional Database: MEDLINE Language: En Journal: Phys Rev Lett Year: 2006 Document type: Article Affiliation country: Francia