Search for the Θ+ pentaquark in the reactions γp→K̄ 0K+n and γp→K̄0K0p

R. De Vita; M. Battaglieri; V. Kubarovsky; N. A. Baltzell; M. Bellis; J. Goett; L. Guo; G. S. Mutchler; P. Stoler; M. Ungaro; D. P. Weygand; M. J. Amaryan; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; V. Batourine; I. Bedlinskiy; N. Benmouna; B. L. Berman; A. S. Biselli; S. Boiarinov; S. Bouchigny; 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; D. Dale; R. De Masi; E. De Sanctis; P. V. Degtyarenko; A. Deur; K. V. Dharmawardane; C. Djalali; G. E. Dodge; J. Donnelly; D. Doughty; Michael Dugger; O. P. Dzyubak; H. Egiyan; K. S. Egiyan; L. El Fassi; L. Elouadrhiri; P. Eugenio; G. Fedotov; H. Funsten; M. Y. Gabrielyan; L. Gan; M. Garçon; A. Gasparian; G. Gavalian; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; O. Glamazdin; J. T. Goetz; E. Golovach; A. Gonenc; C. I O Gordon; R. W. Gothe; K. A. Griffioen; M. Guidal; N. Guler; V. Gyurjyan; C. Hadjidakis; K. Hafidi; H. Hakobyan; R. S. Hakobyan; J. Hardie; F. W. Hersman; K. Hicks; I. Hleiqawi; M. Holtrop; C. E. Hyde-Wright; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; E. L. Isupov; M. M. Ito; D. Jenkins; H. S. Jo; K. Joo; H. G. Juengst; J. D. Kellie; M. Khandaker; W. Kim; A. Klein; F. J. Klein; A. V. Klimenko; M. Kossov; L. H. Kramer; J. Kuhn; S. E. Kuhn; S. V. Kuleshov; J. Lachniet; J. M. Laget; J. Langheinrich; D. Lawrence; T. Lee; Ji Li; K. Livingston; H. Y. Lu; M. MacCormick; N. Markov; B. McKinnon; B. A. Mecking; J. J. Melone; M. D. Mestayer; C. A. Meyer; T. Mibe; K. Mikhailov; R. Minehart; M. Mirazita; R. Miskimen; V. Mochalov; V. Mokeev; L. Morand; S. A. Morrow; M. Moteabbed; P. Nadel-Turonski; I. Nakagawa; R. Nasseripour; S. Niccolai; G. Niculescu; I. Niculescu; B. B. Niczyporuk; M. R. Niroula; R. A. Niyazov; M. Nozar; M. Osipenko; A. I. Ostrovidov; K. Park; E. Pasyuk; C. Paterson; J. Pierce; N. Pivnyuk; D. Pocanic; O. Pogorelko; S. Pozdniakov; J. W. Price; Y. Prok; D. Protopopescu; B. A. Raue; G. Riccardi; G. Ricco; M. Ripani; Barry Ritchie; F. Ronchetti; G. Rosner; P. Rossi; F. Sabatié; C. Salgado; J. P. Santoro; V. Sapunenko; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; N. V. Shvedunov; E. S. Smith; L. C. Smith; D. I. Sober; A. Stavinsky; S. S. Stepanyan; S. Stepanyan; B. E. Stokes; I. I. Strakovsky; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Teymurazyan; U. Thoma; A. Tkabladze; S. Tkachenko; L. Todor; C. Tur; M. F. Vineyard; A. V. Vlassov; D. P. Watts; L. B. Weinstein; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; L. Zana; J. Zhang; B. Zhao; Z. Zhao

doi:10.1103/PhysRevD.74.032001

Search for the Θ+ pentaquark in the reactions γp→K̄ 0K+n and γp→K̄0K0p

R. De Vita, M. Battaglieri, V. Kubarovsky, N. A. Baltzell, M. Bellis, J. Goett, L. Guo, G. S. Mutchler, P. Stoler, M. Ungaro, D. P. Weygand, M. J. Amaryan, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, V. BatourineI. Bedlinskiy, N. Benmouna, B. L. Berman, A. S. Biselli, S. Boiarinov, S. Bouchigny, 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, D. Dale, R. De Masi, E. De Sanctis, P. V. Degtyarenko, A. Deur, K. V. Dharmawardane, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, Michael Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, H. Funsten, M. Y. Gabrielyan, L. Gan, M. Garçon, A. Gasparian, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, O. Glamazdin, J. T. Goetz, E. Golovach, A. Gonenc, C. I O Gordon, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, V. Gyurjyan, C. Hadjidakis, K. Hafidi, H. Hakobyan, R. S. Hakobyan, J. Hardie, F. W. Hersman, K. Hicks, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, M. M. Ito, D. Jenkins, H. S. Jo, K. Joo, H. G. Juengst, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, A. V. Klimenko, M. Kossov, L. H. Kramer, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, T. Lee, Ji Li, K. Livingston, H. Y. Lu, M. MacCormick, N. Markov, B. McKinnon, B. A. Mecking, J. J. Melone, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, R. Minehart, M. Mirazita, R. Miskimen, V. Mochalov, V. Mokeev, L. Morand, S. A. Morrow, M. Moteabbed, P. Nadel-Turonski, I. Nakagawa, R. Nasseripour, S. Niccolai, G. Niculescu, I. Niculescu, B. B. Niczyporuk, M. R. Niroula, R. A. Niyazov, M. Nozar, M. Osipenko, A. I. Ostrovidov, K. Park, E. Pasyuk, C. Paterson, J. Pierce, N. Pivnyuk, D. Pocanic, O. Pogorelko, S. Pozdniakov, J. W. Price, Y. Prok, D. Protopopescu, B. A. Raue, G. Riccardi, G. Ricco, M. Ripani, Barry Ritchie, F. Ronchetti, G. Rosner, P. Rossi, F. Sabatié, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, N. V. Shvedunov, E. S. Smith, L. C. Smith, D. I. Sober, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, I. I. Strakovsky, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Teymurazyan, U. Thoma, A. Tkabladze, S. Tkachenko, L. Todor, C. Tur, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, B. Zhao, Z. Zhao

Research output: Contribution to journal › Article › peer-review

74 Scopus citations

Abstract

The exclusive reactions γp→K̄0K+n and γp→K̄ 0K0p have been studied in the photon energy range 1.6-3.8 GeV, searching for evidence of the exotic baryon Θ+(1540) in the decays Θ+→nK+ and Θ+→pK0. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The integrated luminosity was about 70pb-1. The reactions have been isolated by detecting the K+ and proton directly, the neutral kaon via its decay to KS→π+π- and the neutron or neutral kaon via the missing mass technique. The mass and width of known hyperons such as Σ+, Σ- and Λ(1116) were used as a check of the mass determination accuracy and experimental resolution. Approximately 100000 Λ*(1520)'s and 150000 's were observed in the K̄0K+n and K̄0K0p final state, respectively. No evidence for the Θ+ pentaquark was found in the nK+ or pKS invariant mass spectra. Upper limits were set on the production cross section of the reaction γp→K̄ 0Θ+ as functions of center-of-mass angle, nK+ and pKS masses. Combining the results of the two reactions, the 95% C.L. upper limit on the total cross section for a resonance peaked at 1540 MeV was found to be 0.7 nb. Within most of the available theoretical models, this corresponds to an upper limit on the Θ+ width, ΓΘ+, ranging between 0.01 and 7 MeV.

Original language	English (US)
Article number	032001
Journal	Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume	74
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.74.032001
State	Published - 2006

ASJC Scopus subject areas

Nuclear and High Energy Physics
Physics and Astronomy (miscellaneous)

Access to Document

10.1103/PhysRevD.74.032001

Cite this

De Vita, R., Battaglieri, M., Kubarovsky, V., Baltzell, N. A., Bellis, M., Goett, J., Guo, L., Mutchler, G. S., Stoler, P., Ungaro, M., Weygand, D. P., Amaryan, M. J., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., ... Zhao, Z. (2006). Search for the Θ+ pentaquark in the reactions γp→K̄ 0K+n and γp→K̄0K0p. Physical Review D - Particles, Fields, Gravitation and Cosmology, 74(3), Article 032001. https://doi.org/10.1103/PhysRevD.74.032001

De Vita, R, Battaglieri, M, Kubarovsky, V, Baltzell, NA, Bellis, M, Goett, J, Guo, L, Mutchler, GS, Stoler, P, Ungaro, M, Weygand, DP, Amaryan, MJ, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Batourine, V, Bedlinskiy, I, Benmouna, N, Berman, BL, Biselli, AS, Boiarinov, S, Bouchigny, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bültmann, S, Burkert, VD, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Chen, S, Clinton, E, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crannell, H, Crede, V, Cummings, JP, Dale, D, De Masi, R, De Sanctis, E, Degtyarenko, PV, Deur, A, Dharmawardane, KV, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, H, Egiyan, KS, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Funsten, H, Gabrielyan, MY, Gan, L, Garçon, M, Gasparian, A, Gavalian, G, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Glamazdin, O, Goetz, JT, Golovach, E, Gonenc, A, Gordon, CIO, Gothe, RW, Griffioen, KA, Guidal, M, Guler, N, Gyurjyan, V, Hadjidakis, C, Hafidi, K, Hakobyan, H, Hakobyan, RS, Hardie, J, Hersman, FW, Hicks, K, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Ito, MM, Jenkins, D, Jo, HS, Joo, K, Juengst, HG, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Klimenko, AV, Kossov, M, Kramer, LH, Kuhn, J, Kuhn, SE, Kuleshov, SV, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Lee, T, Li, J, Livingston, K, Lu, HY, MacCormick, M, Markov, N, McKinnon, B, Mecking, BA, Melone, JJ, Mestayer, MD, Meyer, CA, Mibe, T, Mikhailov, K, Minehart, R, Mirazita, M, Miskimen, R, Mochalov, V, Mokeev, V, Morand, L, Morrow, SA, Moteabbed, M, Nadel-Turonski, P, Nakagawa, I, Nasseripour, R, Niccolai, S, Niculescu, G, Niculescu, I, Niczyporuk, BB, Niroula, MR, Niyazov, RA, Nozar, M, Osipenko, M, Ostrovidov, AI, Park, K, Pasyuk, E, Paterson, C, Pierce, J, Pivnyuk, N, Pocanic, D, Pogorelko, O, Pozdniakov, S, Price, JW, Prok, Y, Protopopescu, D, Raue, BA, Riccardi, G, Ricco, G, Ripani, M, Ritchie, B, Ronchetti, F, Rosner, G, Rossi, P, Sabatié, F, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Shvedunov, NV, Smith, ES, Smith, LC, Sober, DI, Stavinsky, A, Stepanyan, SS, Stepanyan, S, Stokes, BE, Strakovsky, II, Strauch, S, Taiuti, M, Tedeschi, DJ, Teymurazyan, A, Thoma, U, Tkabladze, A, Tkachenko, S, Todor, L, Tur, C, Vineyard, MF, Vlassov, AV, Watts, DP, Weinstein, LB, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J, Zhao, B & Zhao, Z 2006, 'Search for the Θ+ pentaquark in the reactions γp→K̄ 0K+n and γp→K̄0K0p', Physical Review D - Particles, Fields, Gravitation and Cosmology, vol. 74, no. 3, 032001. https://doi.org/10.1103/PhysRevD.74.032001

@article{6c859f6bbcbb4c218aac2cc1325b6588,

title = "Search for the Θ+ pentaquark in the reactions γp→{\=K} 0K+n and γp→{\=K}0K0p",

abstract = "The exclusive reactions γp→{\=K}0K+n and γp→{\=K} 0K0p have been studied in the photon energy range 1.6-3.8 GeV, searching for evidence of the exotic baryon Θ+(1540) in the decays Θ+→nK+ and Θ+→pK0. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The integrated luminosity was about 70pb-1. The reactions have been isolated by detecting the K+ and proton directly, the neutral kaon via its decay to KS→π+π- and the neutron or neutral kaon via the missing mass technique. The mass and width of known hyperons such as Σ+, Σ- and Λ(1116) were used as a check of the mass determination accuracy and experimental resolution. Approximately 100000 Λ*(1520)'s and 150000 's were observed in the {\=K}0K+n and {\=K}0K0p final state, respectively. No evidence for the Θ+ pentaquark was found in the nK+ or pKS invariant mass spectra. Upper limits were set on the production cross section of the reaction γp→{\=K} 0Θ+ as functions of center-of-mass angle, nK+ and pKS masses. Combining the results of the two reactions, the 95% C.L. upper limit on the total cross section for a resonance peaked at 1540 MeV was found to be 0.7 nb. Within most of the available theoretical models, this corresponds to an upper limit on the Θ+ width, ΓΘ+, ranging between 0.01 and 7 MeV.",

author = "{De Vita}, R. and M. Battaglieri and V. Kubarovsky and Baltzell, {N. A.} and M. Bellis and J. Goett and L. Guo and Mutchler, {G. S.} and P. Stoler and M. Ungaro and Weygand, {D. P.} and Amaryan, {M. J.} and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Avakian and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and V. Batourine and I. Bedlinskiy and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and S. Boiarinov and S. Bouchigny and R. Bradford and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and S. B{\"u}ltmann and Burkert, {V. D.} and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and S. Chen and E. Clinton and Cole, {P. L.} and P. Collins and P. Coltharp and D. Crabb and H. Crannell and V. Crede and Cummings, {J. P.} and D. Dale and {De Masi}, R. and {De Sanctis}, E. and Degtyarenko, {P. V.} and A. Deur and Dharmawardane, {K. V.} and C. Djalali and Dodge, {G. E.} and J. Donnelly and D. Doughty and Michael Dugger and Dzyubak, {O. P.} and H. Egiyan and Egiyan, {K. S.} and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and H. Funsten and Gabrielyan, {M. Y.} and L. Gan and M. Gar{\c c}on and A. Gasparian and G. Gavalian and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and O. Glamazdin and Goetz, {J. T.} and E. Golovach and A. Gonenc and Gordon, {C. I O} and Gothe, {R. W.} and Griffioen, {K. A.} and M. Guidal and N. Guler and V. Gyurjyan and C. Hadjidakis and K. Hafidi and H. Hakobyan and Hakobyan, {R. S.} and J. Hardie and Hersman, {F. W.} and K. Hicks and I. Hleiqawi and M. Holtrop and Hyde-Wright, {C. E.} and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and Ito, {M. M.} and D. Jenkins and Jo, {H. S.} and K. Joo and Juengst, {H. G.} and Kellie, {J. D.} and M. Khandaker and W. Kim and A. Klein and Klein, {F. J.} and Klimenko, {A. V.} and M. Kossov and Kramer, {L. H.} and J. Kuhn and Kuhn, {S. E.} and Kuleshov, {S. V.} and J. Lachniet and Laget, {J. M.} and J. Langheinrich and D. Lawrence and T. Lee and Ji Li and K. Livingston and Lu, {H. Y.} and M. MacCormick and N. Markov and B. McKinnon and Mecking, {B. A.} and Melone, {J. J.} and Mestayer, {M. D.} and Meyer, {C. A.} and T. Mibe and K. Mikhailov and R. Minehart and M. Mirazita and R. Miskimen and V. Mochalov and V. Mokeev and L. Morand and Morrow, {S. A.} and M. Moteabbed and P. Nadel-Turonski and I. Nakagawa and R. Nasseripour and S. Niccolai and G. Niculescu and I. Niculescu and Niczyporuk, {B. B.} and Niroula, {M. R.} and Niyazov, {R. A.} and M. Nozar and M. Osipenko and Ostrovidov, {A. I.} and K. Park and E. Pasyuk and C. Paterson and J. Pierce and N. Pivnyuk and D. Pocanic and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and Y. Prok and D. Protopopescu and Raue, {B. A.} and G. Riccardi and G. Ricco and M. Ripani and Barry Ritchie and F. Ronchetti and G. Rosner and P. Rossi and F. Sabati{\'e} and C. Salgado and Santoro, {J. P.} and V. Sapunenko and Schumacher, {R. A.} and Serov, {V. S.} and Sharabian, {Y. G.} and Shvedunov, {N. V.} and Smith, {E. S.} and Smith, {L. C.} and Sober, {D. I.} and A. Stavinsky and Stepanyan, {S. S.} and S. Stepanyan and Stokes, {B. E.} and Strakovsky, {I. I.} and S. Strauch and M. Taiuti and Tedeschi, {D. J.} and A. Teymurazyan and U. Thoma and A. Tkabladze and S. Tkachenko and L. Todor and C. Tur and Vineyard, {M. F.} and Vlassov, {A. V.} and Watts, {D. P.} and Weinstein, {L. B.} and M. Williams and E. Wolin and Wood, {M. H.} and A. Yegneswaran and L. Zana and J. Zhang and B. Zhao and Z. Zhao",

year = "2006",

doi = "10.1103/PhysRevD.74.032001",

language = "English (US)",

volume = "74",

journal = "Physical Review D - Particles, Fields, Gravitation and Cosmology",

issn = "1550-7998",

number = "3",

}

TY - JOUR

T1 - Search for the Θ+ pentaquark in the reactions γp→K̄ 0K+n and γp→K̄0K0p

AU - De Vita, R.

AU - Battaglieri, M.

AU - Kubarovsky, V.

AU - Baltzell, N. A.

AU - Bellis, M.

AU - Goett, J.

AU - Guo, L.

AU - Mutchler, G. S.

AU - Stoler, P.

AU - Ungaro, M.

AU - Weygand, D. P.

AU - Amaryan, M. J.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Bouchigny, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bültmann, S.

AU - Burkert, V. D.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Chen, S.

AU - Clinton, E.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crannell, H.

AU - Crede, V.

AU - Cummings, J. P.

AU - Dale, D.

AU - De Masi, R.

AU - De Sanctis, E.

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Dharmawardane, K. V.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Donnelly, J.

AU - Doughty, D.

AU - Dugger, Michael

AU - Dzyubak, O. P.

AU - Egiyan, H.

AU - Egiyan, K. S.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Funsten, H.

AU - Gabrielyan, M. Y.

AU - Gan, L.

AU - Garçon, M.

AU - Gasparian, A.

AU - Gavalian, G.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Glamazdin, O.

AU - Goetz, J. T.

AU - Golovach, E.

AU - Gonenc, A.

AU - Gordon, C. I O

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guler, N.

AU - Gyurjyan, V.

AU - Hadjidakis, C.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hakobyan, R. S.

AU - Hardie, J.

AU - Hersman, F. W.

AU - Hicks, K.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde-Wright, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Ito, M. M.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Joo, K.

AU - Juengst, H. G.

AU - Kellie, J. D.

AU - Khandaker, M.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Klimenko, A. V.

AU - Kossov, M.

AU - Kramer, L. H.

AU - Kuhn, J.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Lachniet, J.

AU - Laget, J. M.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Lee, T.

AU - Li, Ji

AU - Livingston, K.

AU - Lu, H. Y.

AU - MacCormick, M.

AU - Markov, N.

AU - McKinnon, B.

AU - Mecking, B. A.

AU - Melone, J. J.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mibe, T.

AU - Mikhailov, K.

AU - Minehart, R.

AU - Mirazita, M.

AU - Miskimen, R.

AU - Mochalov, V.

AU - Mokeev, V.

AU - Morand, L.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Nadel-Turonski, P.

AU - Nakagawa, I.

AU - Nasseripour, R.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Niczyporuk, B. B.

AU - Niroula, M. R.

AU - Niyazov, R. A.

AU - Nozar, M.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Park, K.

AU - Pasyuk, E.

AU - Paterson, C.

AU - Pierce, J.

AU - Pivnyuk, N.

AU - Pocanic, D.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Riccardi, G.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Ronchetti, F.

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Shvedunov, N. V.

AU - Smith, E. S.

AU - Smith, L. C.

AU - Sober, D. I.

AU - Stavinsky, A.

AU - Stepanyan, S. S.

AU - Stepanyan, S.

AU - Stokes, B. E.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tedeschi, D. J.

AU - Teymurazyan, A.

AU - Thoma, U.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Todor, L.

AU - Tur, C.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Watts, D. P.

AU - Weinstein, L. B.

AU - Williams, M.

AU - Wolin, E.

AU - Wood, M. H.

AU - Yegneswaran, A.

AU - Zana, L.

AU - Zhang, J.

AU - Zhao, B.

AU - Zhao, Z.

PY - 2006

Y1 - 2006

N2 - The exclusive reactions γp→K̄0K+n and γp→K̄ 0K0p have been studied in the photon energy range 1.6-3.8 GeV, searching for evidence of the exotic baryon Θ+(1540) in the decays Θ+→nK+ and Θ+→pK0. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The integrated luminosity was about 70pb-1. The reactions have been isolated by detecting the K+ and proton directly, the neutral kaon via its decay to KS→π+π- and the neutron or neutral kaon via the missing mass technique. The mass and width of known hyperons such as Σ+, Σ- and Λ(1116) were used as a check of the mass determination accuracy and experimental resolution. Approximately 100000 Λ*(1520)'s and 150000 's were observed in the K̄0K+n and K̄0K0p final state, respectively. No evidence for the Θ+ pentaquark was found in the nK+ or pKS invariant mass spectra. Upper limits were set on the production cross section of the reaction γp→K̄ 0Θ+ as functions of center-of-mass angle, nK+ and pKS masses. Combining the results of the two reactions, the 95% C.L. upper limit on the total cross section for a resonance peaked at 1540 MeV was found to be 0.7 nb. Within most of the available theoretical models, this corresponds to an upper limit on the Θ+ width, ΓΘ+, ranging between 0.01 and 7 MeV.

AB - The exclusive reactions γp→K̄0K+n and γp→K̄ 0K0p have been studied in the photon energy range 1.6-3.8 GeV, searching for evidence of the exotic baryon Θ+(1540) in the decays Θ+→nK+ and Θ+→pK0. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The integrated luminosity was about 70pb-1. The reactions have been isolated by detecting the K+ and proton directly, the neutral kaon via its decay to KS→π+π- and the neutron or neutral kaon via the missing mass technique. The mass and width of known hyperons such as Σ+, Σ- and Λ(1116) were used as a check of the mass determination accuracy and experimental resolution. Approximately 100000 Λ*(1520)'s and 150000 's were observed in the K̄0K+n and K̄0K0p final state, respectively. No evidence for the Θ+ pentaquark was found in the nK+ or pKS invariant mass spectra. Upper limits were set on the production cross section of the reaction γp→K̄ 0Θ+ as functions of center-of-mass angle, nK+ and pKS masses. Combining the results of the two reactions, the 95% C.L. upper limit on the total cross section for a resonance peaked at 1540 MeV was found to be 0.7 nb. Within most of the available theoretical models, this corresponds to an upper limit on the Θ+ width, ΓΘ+, ranging between 0.01 and 7 MeV.

UR - http://www.scopus.com/inward/record.url?scp=33746620881&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33746620881&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.74.032001

DO - 10.1103/PhysRevD.74.032001

M3 - Article

AN - SCOPUS:33746620881

SN - 1550-7998

VL - 74

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

IS - 3

M1 - 032001

ER -

Search for the Θ+ pentaquark in the reactions γp→K̄ 0K+n and γp→K̄0K0p

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this