Search for the Θ+ pentaquark in the reaction γd→pK-K+n

B. McKinnon; K. Hicks; N. A. Baltzell; D. S. Carman; M. D. Mestayer; T. Mibe; M. Mirazita; S. Niccolai; P. Rossi; S. Stepanyan; D. J. Tedeschi; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; V. Batourine; M. Battaglieri; I. Bedlinskiy; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; S. Bultmann; V. D. Burkert; C. Butuceanu; J. R. Calarco; S. L. Careccia; S. Chen; P. L. Cole; P. Collins; P. Coltharp; D. Crabb; V. Crede; D. Dale; R. de Masi; R. DeVita; E. de Sanctis; P. V. Degtyarenko; A. Deur; C. Djalali; G. E. Dodge; J. Donnelly; D. Doughty; M. Dugger; O. P. Dzyubak; H. Egiyan; K. S. Egiyan; L. Elouadrhiri; P. Eugenio; G. Fedotov; G. Feldman; H. Funsten; M. Gabrielyan; L. Gan; M. Garcon; A. Gasparian; G. Gavalian; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; A. Gonenc; R. W. Gothe; K. A. Griffioen; M. Guidal; N. Guler; L. Guo; V. Gyurjyan; R. S. Hakobyan; F. W. Hersman; I. Hleiqawi; M. Holtrop; C. E. Hyde-Wright; Y. Ilieva; D. G. Ireland; B. S. Ishkhanov; 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; M. Kossov; L. H. Kramer; V. Kubarovsky; J. Kuhn; S. E. Kuhn; S. V. Kuleshov; J. Lachniet; J. Langheinrich; D. Lawrence; K. Livingston; H. Lu; M. MacCormick; B. A. Mecking; C. A. Meyer; K. Mikhailov; R. Miskimen; V. Mokeev; S. A. Morrow; M. Moteabbed; G. S. Mutchler; I. Nakagawa; P. Nadel-Turonski; R. Nasseripour; 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; O. Pogorelko; S. Pozdniakov; J. W. Price; Y. Prok; D. Protopopescu; B. A. Raue; G. Ricco; M. Ripani; B. G. Ritchie; F. Ronchetti; G. Rosner; F. Sabatie; C. Salgado; J. P. Santoro; V. Sapunenko; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; E. S. Smith; L. C. Smith; D. I. Sober; A. Stavinsky; S. S. Stepanyan; B. E. Stokes; P. Stoler; I. I. Strakovsky; S. Strauch; M. Taiuti; A. Teymurazyan; U. Thoma; A. Tkabladze; S. Tkachenko; C. Tur; M. Ungaro; M. F. Vineyard; A. V. Vlassov; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; L. Zana; J. Zhang; B. Zhao; Z. Zhao

doi:10.1103/PhysRevLett.96.212001

Search for the Θ+ pentaquark in the reaction γd→pK-K+n

B. McKinnon
, K. Hicks
, N. A. Baltzell
, D. S. Carman
, M. D. Mestayer
, T. Mibe
, M. Mirazita
, S. Niccolai
, P. Rossi
, S. Stepanyan
, D. J. Tedeschi
, P. Ambrozewicz
, M. Anghinolfi
, G. Asryan
, H. Avakian
, H. Bagdasaryan
, N. Baillie
, J. P. Ball
, V. Batourine
, M. Battaglieri

I. Bedlinskiy, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, S. Bouchigny, S. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, S. Bultmann, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, S. Chen, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, D. Dale, R. de Masi, R. DeVita, E. de Sanctis, P. V. Degtyarenko, A. Deur, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, M. Dugger, O. P. Dzyubak, H. Egiyan, K. S. Egiyan, L. Elouadrhiri, P. Eugenio, G. Fedotov, G. Feldman, H. Funsten, M. Gabrielyan, L. Gan, M. Garcon, A. Gasparian, G. Gavalian, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, A. Gonenc, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, V. Gyurjyan, R. S. Hakobyan, F. W. Hersman, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, 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, M. Kossov, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. E. Kuhn, S. V. Kuleshov, J. Lachniet, J. Langheinrich, D. Lawrence, K. Livingston, H. Lu, M. MacCormick, B. A. Mecking, C. A. Meyer, K. Mikhailov, R. Miskimen, V. Mokeev, S. A. Morrow, M. Moteabbed, G. S. Mutchler, I. Nakagawa, P. Nadel-Turonski, R. Nasseripour, 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, O. Pogorelko, S. Pozdniakov, J. W. Price, Y. Prok, D. Protopopescu, B. A. Raue, G. Ricco, M. Ripani, B. G. Ritchie, F. Ronchetti, G. Rosner, F. Sabatie, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, E. S. Smith, L. C. Smith, D. I. Sober, A. Stavinsky, S. S. Stepanyan, B. E. Stokes, P. Stoler, I. I. Strakovsky, S. Strauch, M. Taiuti, A. Teymurazyan, U. Thoma, A. Tkabladze, S. Tkachenko, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, L. B. Weinstein, D. P. Weygand, 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

117 Scopus citations

Abstract

A search for the Θ+ in the reaction γd→pK-K+n was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observation of a narrow Θ+ resonance. The present experiment, with more than 30 times the integrated luminosity of our earlier measurement, does not show any evidence for a narrow pentaquark resonance. The angle-integrated upper limit on Θ+ production in the mass range of 1.52-1.56GeV/c2 for the γd→pK-Θ+ reaction is 0.3 nb (95% C.L.). This upper limit depends on assumptions made for the mass and angular distribution of Θ+ production. Using Λ(1520) production as an empirical measure of rescattering in the deuteron, the cross section upper limit for the elementary γn→K-Θ+ reaction is estimated to be a factor of 10 higher, i.e., ∼3nb (95% C.L.).

Original language	English
Article number	212001
Journal	Physical Review Letters
Volume	96
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.96.212001
State	Published - 2006
Externally published	Yes

Access to Document

10.1103/PhysRevLett.96.212001

Cite this

McKinnon, B., Hicks, K., Baltzell, N. A., Carman, D. S., Mestayer, M. D., Mibe, T., Mirazita, M., Niccolai, S., Rossi, P., Stepanyan, S., Tedeschi, D. J., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Batourine, V., ... Zhao, Z. (2006). Search for the Θ+ pentaquark in the reaction γd→pK-K+n. Physical Review Letters, 96(21), Article 212001. https://doi.org/10.1103/PhysRevLett.96.212001

@article{0593183e957f459a98fdfbc955483eff,

title = "Search for the Θ+ pentaquark in the reaction γd→pK-K+n",

abstract = "A search for the Θ+ in the reaction γd→pK-K+n was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observation of a narrow Θ+ resonance. The present experiment, with more than 30 times the integrated luminosity of our earlier measurement, does not show any evidence for a narrow pentaquark resonance. The angle-integrated upper limit on Θ+ production in the mass range of 1.52-1.56GeV/c2 for the γd→pK-Θ+ reaction is 0.3 nb (95\% C.L.). This upper limit depends on assumptions made for the mass and angular distribution of Θ+ production. Using Λ(1520) production as an empirical measure of rescattering in the deuteron, the cross section upper limit for the elementary γn→K-Θ+ reaction is estimated to be a factor of 10 higher, i.e., ∼3nb (95\% C.L.).",

author = "B. McKinnon and K. Hicks and Baltzell, \{N. A.\} and Carman, \{D. S.\} and Mestayer, \{M. D.\} and T. Mibe and M. Mirazita and S. Niccolai and P. Rossi and S. Stepanyan and Tedeschi, \{D. 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 M. Battaglieri and I. Bedlinskiy and M. Bellis and N. Benmouna and Berman, \{B. L.\} and Biselli, \{A. S.\} and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, \{W. J.\} and Brooks, \{W. K.\} and S. Bultmann and Burkert, \{V. D.\} and C. Butuceanu and Calarco, \{J. R.\} and Careccia, \{S. L.\} and S. Chen and Cole, \{P. L.\} and P. Collins and P. Coltharp and D. Crabb and V. Crede and D. Dale and \{de Masi\}, R. and R. DeVita and \{de Sanctis\}, E. and Degtyarenko, \{P. V.\} and A. Deur and C. Djalali and Dodge, \{G. E.\} and J. Donnelly and D. Doughty and M. Dugger and Dzyubak, \{O. P.\} and H. Egiyan and Egiyan, \{K. S.\} and L. Elouadrhiri and P. Eugenio and G. Fedotov and G. Feldman and H. Funsten and M. Gabrielyan and L. Gan and M. Garcon and A. Gasparian and G. Gavalian and Gilfoyle, \{G. P.\} and Giovanetti, \{K. L.\} and Girod, \{F. X.\} and Goetz, \{J. T.\} and A. Gonenc and Gothe, \{R. W.\} and Griffioen, \{K. A.\} and M. Guidal and N. Guler and L. Guo and V. Gyurjyan and Hakobyan, \{R. S.\} and Hersman, \{F. W.\} and I. Hleiqawi and M. Holtrop and Hyde-Wright, \{C. E.\} and Y. Ilieva and Ireland, \{D. G.\} and Ishkhanov, \{B. S.\} 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 M. Kossov and Kramer, \{L. H.\} and V. Kubarovsky and J. Kuhn and Kuhn, \{S. E.\} and Kuleshov, \{S. V.\} and J. Lachniet and J. Langheinrich and D. Lawrence and K. Livingston and H. Lu and M. MacCormick and Mecking, \{B. A.\} and Meyer, \{C. A.\} and K. Mikhailov and R. Miskimen and V. Mokeev and Morrow, \{S. A.\} and M. Moteabbed and Mutchler, \{G. S.\} and I. Nakagawa and P. Nadel-Turonski and R. Nasseripour 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 O. Pogorelko and S. Pozdniakov and Price, \{J. W.\} and Y. Prok and D. Protopopescu and Raue, \{B. A.\} and G. Ricco and M. Ripani and Ritchie, \{B. G.\} and F. Ronchetti and G. Rosner and F. Sabatie and C. Salgado and Santoro, \{J. P.\} and V. Sapunenko and Schumacher, \{R. A.\} and Serov, \{V. S.\} and Sharabian, \{Y. G.\} and Smith, \{E. S.\} and Smith, \{L. C.\} and Sober, \{D. I.\} and A. Stavinsky and Stepanyan, \{S. S.\} and Stokes, \{B. E.\} and P. Stoler and Strakovsky, \{I. I.\} and S. Strauch and M. Taiuti and A. Teymurazyan and U. Thoma and A. Tkabladze and S. Tkachenko and C. Tur and M. Ungaro and Vineyard, \{M. F.\} and Vlassov, \{A. V.\} and Weinstein, \{L. B.\} and Weygand, \{D. P.\} 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/PhysRevLett.96.212001",

language = "English",

volume = "96",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "21",

}

McKinnon, B, Hicks, K, Baltzell, NA, Carman, DS, Mestayer, MD, Mibe, T, Mirazita, M, Niccolai, S, Rossi, P, Stepanyan, S, Tedeschi, DJ, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Batourine, V, Battaglieri, M, Bedlinskiy, I, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Bultmann, S, Burkert, VD, Butuceanu, C, Calarco, JR, Careccia, SL, Chen, S, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crede, V, Dale, D, de Masi, R, DeVita, R, de Sanctis, E, Degtyarenko, PV, Deur, A, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, H, Egiyan, KS, Elouadrhiri, L, Eugenio, P, Fedotov, G, Feldman, G, Funsten, H, Gabrielyan, M, Gan, L, Garcon, M, Gasparian, A, Gavalian, G, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gonenc, A, Gothe, RW, Griffioen, KA, Guidal, M, Guler, N, Guo, L, Gyurjyan, V, Hakobyan, RS, Hersman, FW, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Ito, MM, Jenkins, D, Jo, HS, Joo, K, Juengst, HG, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Kossov, M, Kramer, LH, Kubarovsky, V, Kuhn, J, Kuhn, SE, Kuleshov, SV, Lachniet, J, Langheinrich, J, Lawrence, D, Livingston, K, Lu, H, MacCormick, M, Mecking, BA, Meyer, CA, Mikhailov, K, Miskimen, R, Mokeev, V, Morrow, SA, Moteabbed, M, Mutchler, GS, Nakagawa, I, Nadel-Turonski, P, Nasseripour, R, 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, Pogorelko, O, Pozdniakov, S, Price, JW, Prok, Y, Protopopescu, D, Raue, BA, Ricco, G, Ripani, M, Ritchie, BG, Ronchetti, F, Rosner, G, Sabatie, F, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Smith, ES, Smith, LC, Sober, DI, Stavinsky, A, Stepanyan, SS, Stokes, BE, Stoler, P, Strakovsky, II, Strauch, S, Taiuti, M, Teymurazyan, A, Thoma, U, Tkabladze, A, Tkachenko, S, Tur, C, Ungaro, M, Vineyard, MF, Vlassov, AV, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J, Zhao, B & Zhao, Z 2006, 'Search for the Θ+ pentaquark in the reaction γd→pK-K+n', Physical Review Letters, vol. 96, no. 21, 212001. https://doi.org/10.1103/PhysRevLett.96.212001

TY - JOUR

T1 - Search for the Θ+ pentaquark in the reaction γd→pK-K+n

AU - McKinnon, B.

AU - Hicks, K.

AU - Baltzell, N. A.

AU - Carman, D. S.

AU - Mestayer, M. D.

AU - Mibe, T.

AU - Mirazita, M.

AU - Niccolai, S.

AU - Rossi, P.

AU - Stepanyan, S.

AU - Tedeschi, D. 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 - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Bultmann, S.

AU - Burkert, V. D.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Chen, S.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crede, V.

AU - Dale, D.

AU - de Masi, R.

AU - DeVita, R.

AU - de Sanctis, E.

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Donnelly, J.

AU - Doughty, D.

AU - Dugger, M.

AU - Dzyubak, O. P.

AU - Egiyan, H.

AU - Egiyan, K. S.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Feldman, G.

AU - Funsten, H.

AU - Gabrielyan, M.

AU - Gan, L.

AU - Garcon, M.

AU - Gasparian, A.

AU - Gavalian, G.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gonenc, A.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guler, N.

AU - Guo, L.

AU - Gyurjyan, V.

AU - Hakobyan, R. S.

AU - Hersman, F. W.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde-Wright, C. E.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

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 - Kossov, M.

AU - Kramer, L. H.

AU - Kubarovsky, V.

AU - Kuhn, J.

AU - Kuhn, S. E.

AU - Kuleshov, S. V.

AU - Lachniet, J.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Livingston, K.

AU - Lu, H.

AU - MacCormick, M.

AU - Mecking, B. A.

AU - Meyer, C. A.

AU - Mikhailov, K.

AU - Miskimen, R.

AU - Mokeev, V.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Mutchler, G. S.

AU - Nakagawa, I.

AU - Nadel-Turonski, P.

AU - Nasseripour, R.

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 - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, B. G.

AU - Ronchetti, F.

AU - Rosner, G.

AU - Sabatie, F.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Smith, E. S.

AU - Smith, L. C.

AU - Sober, D. I.

AU - Stavinsky, A.

AU - Stepanyan, S. S.

AU - Stokes, B. E.

AU - Stoler, P.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Teymurazyan, A.

AU - Thoma, U.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Tur, C.

AU - Ungaro, M.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Weinstein, L. B.

AU - Weygand, D. P.

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 - A search for the Θ+ in the reaction γd→pK-K+n was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observation of a narrow Θ+ resonance. The present experiment, with more than 30 times the integrated luminosity of our earlier measurement, does not show any evidence for a narrow pentaquark resonance. The angle-integrated upper limit on Θ+ production in the mass range of 1.52-1.56GeV/c2 for the γd→pK-Θ+ reaction is 0.3 nb (95% C.L.). This upper limit depends on assumptions made for the mass and angular distribution of Θ+ production. Using Λ(1520) production as an empirical measure of rescattering in the deuteron, the cross section upper limit for the elementary γn→K-Θ+ reaction is estimated to be a factor of 10 higher, i.e., ∼3nb (95% C.L.).

AB - A search for the Θ+ in the reaction γd→pK-K+n was completed using the CLAS detector at Jefferson Lab. A study of the same reaction, published earlier, reported the observation of a narrow Θ+ resonance. The present experiment, with more than 30 times the integrated luminosity of our earlier measurement, does not show any evidence for a narrow pentaquark resonance. The angle-integrated upper limit on Θ+ production in the mass range of 1.52-1.56GeV/c2 for the γd→pK-Θ+ reaction is 0.3 nb (95% C.L.). This upper limit depends on assumptions made for the mass and angular distribution of Θ+ production. Using Λ(1520) production as an empirical measure of rescattering in the deuteron, the cross section upper limit for the elementary γn→K-Θ+ reaction is estimated to be a factor of 10 higher, i.e., ∼3nb (95% C.L.).

UR - https://www.scopus.com/pages/publications/33744798760

U2 - 10.1103/PhysRevLett.96.212001

DO - 10.1103/PhysRevLett.96.212001

M3 - Article

AN - SCOPUS:33744798760

SN - 0031-9007

VL - 96

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 212001

ER -

Search for the Θ+ pentaquark in the reaction γd→pK-K+n

Abstract

Access to Document

Other files and links

Fingerprint

Cite this