Search for Θ++ pentaquarks in the exclusive reaction γp→K+K-p

V. Kubarovsky, M. Battaglieri, R. de Vita, J. Goett, L. Guo, G. S. Mutchler, P. Stoler, D. P. Weygand, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, I. Bedlinskiy, M. Bellis, N. BenmounaB. L. Berman, A. S. Biselli, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bültmann, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, S. Chen, E. Clinton, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, H. Crannell, V. Crede, J. P. Cummings, R. de Masi, D. Dale, E. de Sanctis, P. V. Degtyarenko, A. Deur, K. V. Dharmawardane, C. Djalali

Research output: Contribution to journalArticle

14 Scopus citations


The reaction γp→pK+K- was studied at Jefferson Lab with photon energies from 1.8 to 3.8GeV using a tagged photon beam. The goal was to search for a Θ++ pentaquark, a narrow, doubly charged baryon state having strangeness S=+1 and isospin I=1, in the pK+ invariant mass spectrum. No statistically significant evidence of a Θ++ was found. Upper limits on the total and differential cross section for the reaction γp→K-Θ++ were obtained in the mass range from 1.5 to 2.0GeV/c2, with an upper limit for a narrow resonance with a mass MΘ++=1.54GeV/c2 of about 0.15nb, 95% C.L.. This result places a stringent upper limit on the Θ++ width ΓΘ++<0.1MeV/c2.

Original languageEnglish (US)
Article number102001
JournalPhysical review letters
Issue number10
StatePublished - 2006

Fingerprint Dive into the research topics of 'Search for Θ++ pentaquarks in the exclusive reaction γp→K+K-p'. Together they form a unique fingerprint.

  • Cite this

    Kubarovsky, V., Battaglieri, M., de Vita, R., Goett, J., Guo, L., Mutchler, G. S., Stoler, P., Weygand, D. P., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., Batourine, V., Bedlinskiy, I., Bellis, M., ... Djalali, C. (2006). Search for Θ++ pentaquarks in the exclusive reaction γp→K+K-p. Physical review letters, 97(10), [102001].