Bayesian analysis of pentaquark signals from CLAS data

D. G. Ireland; B. McKinnon; D. Protopopescu; P. Ambrozewicz; M. Anghinolfi; G. Asryan; H. Avakian; H. Bagdasaryan; N. Baillie; J. P. Ball; N. A. Baltzell; V. Batourine; M. Battaglieri; I. Bedlinskiy; M. Bellis; N. Benmouna; B. L. Berman; A. S. Biselli; L. Blaszczyk; S. Bouchigny; S. Boiarinov; R. Bradford; D. Branford; W. J. Briscoe; W. K. Brooks; V. D. Burkert; C. Butuceanu; J. R. Calarco; S. L. Careccia; D. S. Carman; L. Casey; S. Chen; L. Cheng; P. L. Cole; P. Collins; P. Coltharp; D. Crabb; V. Crede; N. Dashyan; R. De Masi; R. De Vita; E. De Sanctis; P. V. Degtyarenko; A. Deur; R. Dickson; C. Djalali; G. E. Dodge; J. Donnelly; D. Doughty; Michael Dugger; O. P. Dzyubak; K. S. Egiyan; L. El Fassi; L. Elouadrhiri; P. Eugenio; G. Fedotov; G. Feldman; A. Fradi; H. Funsten; M. Garçon; G. Gavalian; N. Gevorgyan; G. P. Gilfoyle; K. L. Giovanetti; F. X. Girod; J. T. Goetz; W. Gohn; A. Gonenc; R. W. Gothe; K. A. Griffioen; M. Guidal; N. Guler; L. Guo; V. Gyurjyan; K. Hafidi; H. Hakobyan; C. Hanretty; N. Hassall; F. W. Hersman; I. Hleiqawi; M. Holtrop; C. E. Hyde-Wright; Y. Ilieva; B. S. Ishkhanov; E. L. Isupov; D. Jenkins; H. S. Jo; J. R. Johnstone; K. Joo; H. G. Juengst; N. Kalantarians; J. D. Kellie; M. Khandaker; W. Kim; A. Klein; F. J. Klein; M. Kossov; Z. Krahn; L. H. Kramer; V. Kubarovsky; J. Kuhn; S. V. Kuleshov; V. Kuznetsov; J. Lachniet; J. M. Laget; J. Langheinrich; D. Lawrence; K. Livingston; H. Y. Lu; M. MacCormick; N. Markov; P. Mattione; B. A. Mecking; M. D. Mestayer; C. A. Meyer; T. Mibe; K. Mikhailov; M. Mirazita; R. Miskimen; V. Mokeev; B. Moreno; K. Moriya; S. A. Morrow; M. Moteabbed; E. Munevar; G. S. Mutchler; P. Nadel-Turonski; 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; S. Anefalos Pereira; J. Pierce; N. Pivnyuk; O. Pogorelko; S. Pozdniakov; J. W. Price; S. Procureur; Y. Prok; B. A. Raue; G. Ricco; M. Ripani; Barry Ritchie; F. Ronchetti; G. Rosner; P. Rossi; F. Sabatié; J. Salamanca; C. Salgado; J. P. Santoro; V. Sapunenko; R. A. Schumacher; V. S. Serov; Y. G. Sharabian; D. Sharov; N. V. Shvedunov; L. C. Smith; D. I. Sober; D. Sokhan; A. Stavinsky; S. S. Stepanyan; S. Stepanyan; B. E. Stokes; P. Stoler; S. Strauch; M. Taiuti; D. J. Tedeschi; A. Tkabladze; S. Tkachenko; C. Tur; M. Ungaro; M. F. Vineyard; A. V. Vlassov; D. P. Watts; L. B. Weinstein; D. P. Weygand; M. Williams; E. Wolin; M. H. Wood; A. Yegneswaran; L. Zana; J. Zhang; B. Zhao; Z. W. Zhao

doi:10.1103/PhysRevLett.100.052001

Bayesian analysis of pentaquark signals from CLAS data

D. G. Ireland, B. McKinnon, D. Protopopescu, P. Ambrozewicz, M. Anghinolfi, G. Asryan, H. Avakian, H. Bagdasaryan, N. Baillie, J. P. Ball, N. A. Baltzell, V. Batourine, M. Battaglieri, I. Bedlinskiy, M. Bellis, N. Benmouna, B. L. Berman, A. S. Biselli, L. Blaszczyk, S. BouchignyS. Boiarinov, R. Bradford, D. Branford, W. J. Briscoe, W. K. Brooks, V. D. Burkert, C. Butuceanu, J. R. Calarco, S. L. Careccia, D. S. Carman, L. Casey, S. Chen, L. Cheng, P. L. Cole, P. Collins, P. Coltharp, D. Crabb, V. Crede, N. Dashyan, R. De Masi, R. De Vita, E. De Sanctis, P. V. Degtyarenko, A. Deur, R. Dickson, C. Djalali, G. E. Dodge, J. Donnelly, D. Doughty, Michael Dugger, O. P. Dzyubak, K. S. Egiyan, L. El Fassi, L. Elouadrhiri, P. Eugenio, G. Fedotov, G. Feldman, A. Fradi, H. Funsten, M. Garçon, G. Gavalian, N. Gevorgyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, J. T. Goetz, W. Gohn, A. Gonenc, R. W. Gothe, K. A. Griffioen, M. Guidal, N. Guler, L. Guo, V. Gyurjyan, K. Hafidi, H. Hakobyan, C. Hanretty, N. Hassall, F. W. Hersman, I. Hleiqawi, M. Holtrop, C. E. Hyde-Wright, Y. Ilieva, B. S. Ishkhanov, E. L. Isupov, D. Jenkins, H. S. Jo, J. R. Johnstone, K. Joo, H. G. Juengst, N. Kalantarians, J. D. Kellie, M. Khandaker, W. Kim, A. Klein, F. J. Klein, M. Kossov, Z. Krahn, L. H. Kramer, V. Kubarovsky, J. Kuhn, S. V. Kuleshov, V. Kuznetsov, J. Lachniet, J. M. Laget, J. Langheinrich, D. Lawrence, K. Livingston, H. Y. Lu, M. MacCormick, N. Markov, P. Mattione, B. A. Mecking, M. D. Mestayer, C. A. Meyer, T. Mibe, K. Mikhailov, M. Mirazita, R. Miskimen, V. Mokeev, B. Moreno, K. Moriya, S. A. Morrow, M. Moteabbed, E. Munevar, G. S. Mutchler, P. Nadel-Turonski, 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, S. Anefalos Pereira, J. Pierce, N. Pivnyuk, O. Pogorelko, S. Pozdniakov, J. W. Price, S. Procureur, Y. Prok, B. A. Raue, G. Ricco, M. Ripani, Barry Ritchie, F. Ronchetti, G. Rosner, P. Rossi, F. Sabatié, J. Salamanca, C. Salgado, J. P. Santoro, V. Sapunenko, R. A. Schumacher, V. S. Serov, Y. G. Sharabian, D. Sharov, N. V. Shvedunov, L. C. Smith, D. I. Sober, D. Sokhan, A. Stavinsky, S. S. Stepanyan, S. Stepanyan, B. E. Stokes, P. Stoler, S. Strauch, M. Taiuti, D. J. Tedeschi, A. Tkabladze, S. Tkachenko, C. Tur, M. Ungaro, M. F. Vineyard, A. V. Vlassov, D. P. Watts, L. B. Weinstein, D. P. Weygand, M. Williams, E. Wolin, M. H. Wood, A. Yegneswaran, L. Zana, J. Zhang, B. Zhao, Z. W. Zhao

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

17 Scopus citations

Abstract

We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a Θ+ pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis, we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a Θ+. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.

Original language	English (US)
Article number	052001
Journal	Physical Review Letters
Volume	100
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevLett.100.052001
State	Published - Feb 6 2008

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1103/PhysRevLett.100.052001

Cite this

Ireland, D. G., McKinnon, B., Protopopescu, D., Ambrozewicz, P., Anghinolfi, M., Asryan, G., Avakian, H., Bagdasaryan, H., Baillie, N., Ball, J. P., Baltzell, N. A., Batourine, V., Battaglieri, M., Bedlinskiy, I., Bellis, M., Benmouna, N., Berman, B. L., Biselli, A. S., Blaszczyk, L., ... Zhao, Z. W. (2008). Bayesian analysis of pentaquark signals from CLAS data. Physical Review Letters, 100(5), [052001]. https://doi.org/10.1103/PhysRevLett.100.052001

Ireland, DG, McKinnon, B, Protopopescu, D, Ambrozewicz, P, Anghinolfi, M, Asryan, G, Avakian, H, Bagdasaryan, H, Baillie, N, Ball, JP, Baltzell, NA, Batourine, V, Battaglieri, M, Bedlinskiy, I, Bellis, M, Benmouna, N, Berman, BL, Biselli, AS, Blaszczyk, L, Bouchigny, S, Boiarinov, S, Bradford, R, Branford, D, Briscoe, WJ, Brooks, WK, Burkert, VD, Butuceanu, C, Calarco, JR, Careccia, SL, Carman, DS, Casey, L, Chen, S, Cheng, L, Cole, PL, Collins, P, Coltharp, P, Crabb, D, Crede, V, Dashyan, N, De Masi, R, De Vita, R, De Sanctis, E, Degtyarenko, PV, Deur, A, Dickson, R, Djalali, C, Dodge, GE, Donnelly, J, Doughty, D, Dugger, M, Dzyubak, OP, Egiyan, KS, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Feldman, G, Fradi, A, Funsten, H, Garçon, M, Gavalian, G, Gevorgyan, N, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Goetz, JT, Gohn, W, Gonenc, A, Gothe, RW, Griffioen, KA, Guidal, M, Guler, N, Guo, L, Gyurjyan, V, Hafidi, K, Hakobyan, H, Hanretty, C, Hassall, N, Hersman, FW, Hleiqawi, I, Holtrop, M, Hyde-Wright, CE, Ilieva, Y, Ishkhanov, BS, Isupov, EL, Jenkins, D, Jo, HS, Johnstone, JR, Joo, K, Juengst, HG, Kalantarians, N, Kellie, JD, Khandaker, M, Kim, W, Klein, A, Klein, FJ, Kossov, M, Krahn, Z, Kramer, LH, Kubarovsky, V, Kuhn, J, Kuleshov, SV, Kuznetsov, V, Lachniet, J, Laget, JM, Langheinrich, J, Lawrence, D, Livingston, K, Lu, HY, MacCormick, M, Markov, N, Mattione, P, Mecking, BA, Mestayer, MD, Meyer, CA, Mibe, T, Mikhailov, K, Mirazita, M, Miskimen, R, Mokeev, V, Moreno, B, Moriya, K, Morrow, SA, Moteabbed, M, Munevar, E, Mutchler, GS, Nadel-Turonski, P, 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, Pereira, SA, Pierce, J, Pivnyuk, N, Pogorelko, O, Pozdniakov, S, Price, JW, Procureur, S, Prok, Y, Raue, BA, Ricco, G, Ripani, M, Ritchie, B, Ronchetti, F, Rosner, G, Rossi, P, Sabatié, F, Salamanca, J, Salgado, C, Santoro, JP, Sapunenko, V, Schumacher, RA, Serov, VS, Sharabian, YG, Sharov, D, Shvedunov, NV, Smith, LC, Sober, DI, Sokhan, D, Stavinsky, A, Stepanyan, SS, Stepanyan, S, Stokes, BE, Stoler, P, Strauch, S, Taiuti, M, Tedeschi, DJ, Tkabladze, A, Tkachenko, S, Tur, C, Ungaro, M, Vineyard, MF, Vlassov, AV, Watts, DP, Weinstein, LB, Weygand, DP, Williams, M, Wolin, E, Wood, MH, Yegneswaran, A, Zana, L, Zhang, J, Zhao, B & Zhao, ZW 2008, 'Bayesian analysis of pentaquark signals from CLAS data', Physical Review Letters, vol. 100, no. 5, 052001. https://doi.org/10.1103/PhysRevLett.100.052001

@article{3ea9028094d145f09dfe3e821e8489ad,

title = "Bayesian analysis of pentaquark signals from CLAS data",

abstract = "We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a Θ+ pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis, we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a Θ+. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.",

author = "Ireland, {D. G.} and B. McKinnon and D. Protopopescu and P. Ambrozewicz and M. Anghinolfi and G. Asryan and H. Avakian and H. Bagdasaryan and N. Baillie and Ball, {J. P.} and Baltzell, {N. A.} and V. Batourine and M. Battaglieri and I. Bedlinskiy and M. Bellis and N. Benmouna and Berman, {B. L.} and Biselli, {A. S.} and L. Blaszczyk and S. Bouchigny and S. Boiarinov and R. Bradford and D. Branford and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and C. Butuceanu and Calarco, {J. R.} and Careccia, {S. L.} and Carman, {D. S.} and L. Casey and S. Chen and L. Cheng and Cole, {P. L.} and P. Collins and P. Coltharp and D. Crabb and V. Crede and N. Dashyan and {De Masi}, R. and {De Vita}, R. and {De Sanctis}, E. and Degtyarenko, {P. V.} and A. Deur and R. Dickson and C. Djalali and Dodge, {G. E.} and J. Donnelly and D. Doughty and Michael Dugger and Dzyubak, {O. P.} and Egiyan, {K. S.} and {El Fassi}, L. and L. Elouadrhiri and P. Eugenio and G. Fedotov and G. Feldman and A. Fradi and H. Funsten and M. Gar{\c c}on and G. Gavalian and N. Gevorgyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Goetz, {J. T.} and W. Gohn and A. Gonenc and Gothe, {R. W.} and Griffioen, {K. A.} and M. Guidal and N. Guler and L. Guo and V. Gyurjyan and K. Hafidi and H. Hakobyan and C. Hanretty and N. Hassall and Hersman, {F. W.} and I. Hleiqawi and M. Holtrop and Hyde-Wright, {C. E.} and Y. Ilieva and Ishkhanov, {B. S.} and Isupov, {E. L.} and D. Jenkins and Jo, {H. S.} and Johnstone, {J. R.} and K. Joo and Juengst, {H. G.} and N. Kalantarians and Kellie, {J. D.} and M. Khandaker and W. Kim and A. Klein and Klein, {F. J.} and M. Kossov and Z. Krahn and Kramer, {L. H.} and V. Kubarovsky and J. Kuhn and Kuleshov, {S. V.} and V. Kuznetsov and J. Lachniet and Laget, {J. M.} and J. Langheinrich and D. Lawrence and K. Livingston and Lu, {H. Y.} and M. MacCormick and N. Markov and P. Mattione and Mecking, {B. A.} and Mestayer, {M. D.} and Meyer, {C. A.} and T. Mibe and K. Mikhailov and M. Mirazita and R. Miskimen and V. Mokeev and B. Moreno and K. Moriya and Morrow, {S. A.} and M. Moteabbed and E. Munevar and Mutchler, {G. S.} and P. Nadel-Turonski 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 Pereira, {S. Anefalos} and J. Pierce and N. Pivnyuk and O. Pogorelko and S. Pozdniakov and Price, {J. W.} and S. Procureur and Y. Prok and Raue, {B. A.} and G. Ricco and M. Ripani and Barry Ritchie and F. Ronchetti and G. Rosner and P. Rossi and F. Sabati{\'e} and J. Salamanca and C. Salgado and Santoro, {J. P.} and V. Sapunenko and Schumacher, {R. A.} and Serov, {V. S.} and Sharabian, {Y. G.} and D. Sharov and Shvedunov, {N. V.} and Smith, {L. C.} and Sober, {D. I.} and D. Sokhan and A. Stavinsky and Stepanyan, {S. S.} and S. Stepanyan and Stokes, {B. E.} and P. Stoler and S. Strauch and M. Taiuti and Tedeschi, {D. J.} and A. Tkabladze and S. Tkachenko and C. Tur and M. Ungaro and Vineyard, {M. F.} and Vlassov, {A. V.} and Watts, {D. P.} 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 Zhao, {Z. W.}",

year = "2008",

month = feb,

day = "6",

doi = "10.1103/PhysRevLett.100.052001",

language = "English (US)",

volume = "100",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "5",

}

TY - JOUR

T1 - Bayesian analysis of pentaquark signals from CLAS data

AU - Ireland, D. G.

AU - McKinnon, B.

AU - Protopopescu, D.

AU - Ambrozewicz, P.

AU - Anghinolfi, M.

AU - Asryan, G.

AU - Avakian, H.

AU - Bagdasaryan, H.

AU - Baillie, N.

AU - Ball, J. P.

AU - Baltzell, N. A.

AU - Batourine, V.

AU - Battaglieri, M.

AU - Bedlinskiy, I.

AU - Bellis, M.

AU - Benmouna, N.

AU - Berman, B. L.

AU - Biselli, A. S.

AU - Blaszczyk, L.

AU - Bouchigny, S.

AU - Boiarinov, S.

AU - Bradford, R.

AU - Branford, D.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Butuceanu, C.

AU - Calarco, J. R.

AU - Careccia, S. L.

AU - Carman, D. S.

AU - Casey, L.

AU - Chen, S.

AU - Cheng, L.

AU - Cole, P. L.

AU - Collins, P.

AU - Coltharp, P.

AU - Crabb, D.

AU - Crede, V.

AU - Dashyan, N.

AU - De Masi, R.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Degtyarenko, P. V.

AU - Deur, A.

AU - Dickson, R.

AU - Djalali, C.

AU - Dodge, G. E.

AU - Donnelly, J.

AU - Doughty, D.

AU - Dugger, Michael

AU - Dzyubak, O. P.

AU - Egiyan, K. S.

AU - El Fassi, L.

AU - Elouadrhiri, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Feldman, G.

AU - Fradi, A.

AU - Funsten, H.

AU - Garçon, M.

AU - Gavalian, G.

AU - Gevorgyan, N.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Goetz, J. T.

AU - Gohn, W.

AU - Gonenc, A.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Guler, N.

AU - Guo, L.

AU - Gyurjyan, V.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Hassall, N.

AU - Hersman, F. W.

AU - Hleiqawi, I.

AU - Holtrop, M.

AU - Hyde-Wright, C. E.

AU - Ilieva, Y.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Jenkins, D.

AU - Jo, H. S.

AU - Johnstone, J. R.

AU - Joo, K.

AU - Juengst, H. G.

AU - Kalantarians, N.

AU - Kellie, J. D.

AU - Khandaker, M.

AU - Kim, W.

AU - Klein, A.

AU - Klein, F. J.

AU - Kossov, M.

AU - Krahn, Z.

AU - Kramer, L. H.

AU - Kubarovsky, V.

AU - Kuhn, J.

AU - Kuleshov, S. V.

AU - Kuznetsov, V.

AU - Lachniet, J.

AU - Laget, J. M.

AU - Langheinrich, J.

AU - Lawrence, D.

AU - Livingston, K.

AU - Lu, H. Y.

AU - MacCormick, M.

AU - Markov, N.

AU - Mattione, P.

AU - Mecking, B. A.

AU - Mestayer, M. D.

AU - Meyer, C. A.

AU - Mibe, T.

AU - Mikhailov, K.

AU - Mirazita, M.

AU - Miskimen, R.

AU - Mokeev, V.

AU - Moreno, B.

AU - Moriya, K.

AU - Morrow, S. A.

AU - Moteabbed, M.

AU - Munevar, E.

AU - Mutchler, G. S.

AU - Nadel-Turonski, P.

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 - Pereira, S. Anefalos

AU - Pierce, J.

AU - Pivnyuk, N.

AU - Pogorelko, O.

AU - Pozdniakov, S.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Raue, B. A.

AU - Ricco, G.

AU - Ripani, M.

AU - Ritchie, Barry

AU - Ronchetti, F.

AU - Rosner, G.

AU - Rossi, P.

AU - Sabatié, F.

AU - Salamanca, J.

AU - Salgado, C.

AU - Santoro, J. P.

AU - Sapunenko, V.

AU - Schumacher, R. A.

AU - Serov, V. S.

AU - Sharabian, Y. G.

AU - Sharov, D.

AU - Shvedunov, N. V.

AU - Smith, L. C.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Stavinsky, A.

AU - Stepanyan, S. S.

AU - Stepanyan, S.

AU - Stokes, B. E.

AU - Stoler, P.

AU - Strauch, S.

AU - Taiuti, M.

AU - Tedeschi, D. J.

AU - Tkabladze, A.

AU - Tkachenko, S.

AU - Tur, C.

AU - Ungaro, M.

AU - Vineyard, M. F.

AU - Vlassov, A. V.

AU - Watts, D. P.

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. W.

PY - 2008/2/6

Y1 - 2008/2/6

N2 - We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a Θ+ pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis, we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a Θ+. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.

AB - We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a Θ+ pentaquark, while the other found no such evidence. The unique feature of these two experiments was that they were performed with the same experimental setup. Using a Bayesian analysis, we find that the results of the two experiments are in fact compatible with each other, but that the first measurement did not contain sufficient information to determine unambiguously the existence of a Θ+. Further, we suggest a means by which the existence of a new candidate particle can be tested in a rigorous manner.

UR - http://www.scopus.com/inward/record.url?scp=38949217763&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38949217763&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.100.052001

DO - 10.1103/PhysRevLett.100.052001

M3 - Article

AN - SCOPUS:38949217763

VL - 100

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 5

M1 - 052001

ER -

Bayesian analysis of pentaquark signals from CLAS data

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