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Kuleshov, Sergey
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Kuleshov, Sergey
Campus / Sede
Campus Casa Central Valparaíso
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Scopus Author ID
7005906193
Now showing 1 - 8 of 8
- PublicationNear-threshold neutral pion electroproduction at high momentum transfers and generalized form factors(2013-04-15)
;Khetarpal, P. ;Stoler, P. ;Aznauryan, I. G. ;Kubarovsky, V. ;Adhikari, K. P. ;Adikaram, D. ;Aghasyan, M. ;Amaryan, M. J. ;Anderson, M. D. ;Anefalos Pereira, S. ;Anghinolfi, M. ;Avakian, H. ;Baghdasaryan, H. ;Ball, J. ;Baltzell, N. A. ;Battaglieri, M. ;Batourine, V. ;Bedlinskiy, I. ;Biselli, A. S. ;Bono, J. ;Boiarinov, S. ;Briscoe, W. J.; ;Carman, D. S. ;Celentano, A. ;Charles, G. ;Cole, P. L. ;Contalbrigo, M. ;Crede, V. ;D'Angelo, A. ;Dashyan, N. ;De Vita, R. ;De Sanctis, E. ;Deur, A. ;Djalali, C. ;Doughty, D. ;Dugger, M. ;Dupre, R. ;Egiyan, H. ;El Alaoui, A. ;El Fassi, L. ;Eugenio, P. ;Fedotov, G. ;Fegan, S. ;Fersch, R. ;Fleming, J. A. ;Fradi, A. ;Gabrielyan, M. Y. ;Garçon, M. ;Gevorgyan, N. ;Gilfoyle, G. P. ;Giovanetti, K. L. ;Girod, F. X. ;Goetz, J. T. ;Gohn, W. ;Golovatch, E. ;Gothe, R. W. ;Griffioen, K. A. ;Guegan, B. ;Guidal, M. ;Guo, L. ;Hafidi, K.; ;Hanretty, C. ;Harrison, N. ;Hicks, K. ;Ho, D. ;Holtrop, M. ;Hyde, C. E. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jo, H. S. ;Joo, K. ;Keller, D. ;Khandaker, M. ;Kim, A. ;Kim, W. ;Klein, F. J. ;Koirala, S. ;Kubarovsky, A.; ;Kvaltine, N. D. ;Lewis, S. ;Livingston, K. ;Lu, H. Y. ;Macgregor, I. J.D. ;Mao, Y. ;Martinez, D. ;Mayer, M. ;McKinnon, B. ;Meyer, C. A. ;Mineeva, T. ;Mirazita, M. ;Mokeev, V. ;Montgomery, R. A. ;Moutarde, H.Munevar, E.We report the measurement of near-threshold neutral pion electroproduction cross sections and the extraction of the associated structure functions on the proton in the kinematic range Q2 from 2 to 4.5 GeV2 and W from 1.08 to 1.16 GeV. These measurements allow us to access the dominant pion-nucleon s-wave multipoles E0+ and S0+ in the near-threshold region. In the light-cone sum-rule framework (LCSR), these multipoles are related to the generalized form factors Gπ0p 1 (Q2) and Gπ0p 2 (Q2). The data are compared to these generalized form factors and the results for Gπ0p 1 (Q2) are found to be in good agreement with the LCSR predictions, but the level of agreement with Gπ0p 2 (Q2) is poor. - PublicationEvidence for the onset of color transparency in ρ 0 electroproduction off nuclei(2012-06-12)
;El Fassi, L. ;Zana, L. ;Hafidi, K. ;Holtrop, M. ;Mustapha, B.; ; ;Zheng, X. ;Adhikari, K. P. ;Adikaram, D. ;Aghasyan, M. ;Amaryan, M. J. ;Anghinolfi, M. ;Arrington, J. ;Avakian, H. ;Baghdasaryan, H. ;Battaglieri, M. ;Batourine, V. ;Bedlinskiy, I. ;Biselli, A. S. ;Bookwalter, C. ;Branford, D. ;Briscoe, W. J. ;Bültmann, S. ;Burkert, V. D. ;Carman, D. S. ;Celentano, A. ;Chandavar, S. ;Cole, P. L. ;Contalbrigo, M. ;Crede, V. ;D'Angelo, A. ;Daniel, A. ;Dashyan, N. ;De Vita, R. ;De Sanctis, E. ;Deur, A. ;Dey, B. ;Dickson, R. ;Djalali, C. ;Dodge, G. E. ;Doughty, D. ;Dupre, R. ;Egiyan, H.; ;Elouadrhiri, L. ;Eugenio, P. ;Fedotov, G. ;Fegan, S. ;Gabrielyan, M. Y. ;Garçon, M. ;Gevorgyan, N. ;Gilfoyle, G. P. ;Giovanetti, K. L. ;Girod, F. X. ;Goetz, J. T. ;Gohn, W. ;Golovatch, E. ;Gothe, R. W. ;Griffioen, K. A. ;Guidal, M. ;Guo, L. ;Hanretty, C. ;Heddle, D. ;Hicks, K. ;Holt, R. J. ;Hyde, C. E. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jawalkar, S. S. ;Keller, D. ;Khandaker, M. ;Khetarpal, P. ;Kim, A. ;Kim, W. ;Klein, A. ;Klein, F. J. ;Kubarovsky, V. ;Kuhn, S. E.; ;Kuznetsov, V. ;Laget, J. M. ;Lu, H. Y. ;MacGregor, I. J.D. ;Mao, Y. ;Markov, N. ;Mayer, M. ;McAndrew, J. ;McKinnon, B. ;Meyer, C. A. ;Mineeva, T. ;Mirazita, M. ;Mokeev, V. ;Moreno, B. ;Moutarde, H. ;Munevar, E. ;Nadel-Turonski, P.Ni, A.We have measured the nuclear transparency of the incoherent diffractive A(e, e ρ0) process in 12C and 56Fe targets relative to 2H using a 5 GeV electron beam. The nuclear transparency, the ratio of the produced ρ0’s on a nucleus relative to deuterium, which is sensitive to ρ A interaction, was studied as function of the coherence length (lc ), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared (Q 2). While the transparency for both 12C and 56Fe showed no lc dependence, a significant Q 2 dependence was measured, which is consistent with calculations that included the color transparency effects.Scopus© Citations 46 - PublicationSemi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS(2018-07-10)
;Jawalkar, S. ;Koirala, S. ;Avakian, H. ;Bosted, P. ;Griffioen, K. A. ;Keith, C. ;Kuhn, S. E. ;Adhikari, K. P. ;Adhikari, S. ;Adikaram, D. ;Akbar, Z. ;Amaryan, M. J. ;Anefalos Pereira, S. ;Ball, J. ;Baltzell, N. A. ;Battaglieri, M. ;Batourine, V. ;Bedlinskiy, I. ;Biselli, A. S. ;Boiarinov, S. ;Briscoe, W. J. ;Brock, J.; ;Bültmann, S. ;Burkert, V. D. ;Cao, Frank Thanh ;Carlin, C. ;Carman, D. S. ;Celentano, A. ;Charles, G. ;Chetry, T. ;Ciullo, G. ;Clark, L. ;Colaneri, L. ;Cole, P. L. ;Contalbrigo, M. ;Cortes, O. ;Crede, V. ;D'Angelo, A. ;Dashyan, N. ;De Vita, R. ;De Sanctis, E. ;Defurne, M. ;Deur, A. ;Djalali, C. ;Ddoge, G. ;Dupre, R. ;Egiyan, H.; ;El Fassi, L. ;Elouadrhiri, L. ;Eugenio, P. ;Fedotov, G. ;Fegan, S. ;Fersch, R. ;Filippi, A. ;Fleming, J. A. ;Forest, T. A. ;Fradi, A. ;Garçon, M. ;Ghandilyan, Y. ;Gilfoyle, G. P. ;Giovanetti, K. L. ;Girod, F. X. ;Gleason, C. ;Gohn, W. ;Golovatch, E. ;Gothe, R. W. ;Guidal, M. ;Guler, N. ;Guo, L.; ;Hanretty, C. ;Harrison, N. ;Hattawy, M. ;Heddle, D. ;Hicks, K. ;Hollis, G. ;Holtrop, M. ;Hughes, S. M. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jenkins, D. ;Jiang, H. ;Joo, K. ;Joosten, S. ;Keller, D. ;Khachatryan, G. ;Khachatryan, M. ;Khandaker, M. ;Kim, A. ;Kim, W. ;Klein, A. ;Klein, F. J. ;Kubarovsky, V.; ;Lanza, L.We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic 14NH3 target, and extracted double and single target spin asymmetries for ep → e π0 X in multidimensional bins in four-momentum transfer (1.0 < Q 2 < 3.2 GeV2), Bjorken-x (0.12 < x < 0.48), hadron energy fraction (0.4 < z < 0.7), transverse pion momentum (0 < PT < 1.0 GeV), and azimuthal angle φh between the lepton scattering and hadron production planes. We extracted asymmetries as a function of both x and PT , which provide access to transverse-momentum distributions of longitudinally polarized quarks. The double spin asymmetries depend weakly on PT . The sin 2φh moments are zero within uncertainties, which is consistent with the expected suppression of the Collins fragmentation function. The observed sinφh moments suggest that quark gluon correlations are significant at large x.Scopus© Citations 10 - PublicationMeasurement of the beam asymmetry Σ and the target asymmetry T in the photoproduction of ω mesons off the proton using CLAS at Jefferson Laboratory(2018-05-04)
;Roy, P. ;Akbar, Z. ;Park, S. ;Crede, V. ;Anisovich, A. V. ;Denisenko, I. ;Klempt, E. ;Nikonov, V. A. ;Sarantsev, A. V. ;Adhikari, K. P. ;Adhikari, S. ;Anefalos Pereira, S. ;Ball, J. ;Balossino, I. ;Bashkanov, M. ;Battaglieri, M. ;Batourine, V. ;Bedlinskiy, I. ;Biselli, A. S. ;Boiarinov, S. ;Briscoe, W. J. ;Brock, J.; ;Burkert, V. D. ;Carlin, C. ;Carman, D. S. ;Celentano, A. ;Charles, G. ;Chetry, T. ;Ciullo, G. ;Clary, B. A. ;Cole, P. L. ;Contalbrigo, M. ;D'Angelo, A. ;Dashyan, N. ;De Vita, R. ;Deur, A. ;Djalali, C. ;Dugger, M. ;Dupre, R.; ;El Fassi, L. ;Elouadrhiri, L. ;Eugenio, P. ;Fedotov, G. ;Fegan, S. ;Filippi, A. ;Fradi, A. ;Gavalian, G. ;Gevorgyan, N. ;Gilfoyle, G. P. ;Giovanetti, K. L. ;Girod, F. X. ;Gleason, C. ;Gohn, W. ;Golovatch, E. ;Gothe, R. W. ;Griffioen, K. A. ;Guidal, M. ;Guo, L. ;Hafidi, K.; ;Hanretty, C. ;Hattawy, M. ;Hicks, K. ;Holtrop, M. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jenkins, D. ;Joo, K. ;Joosten, S. ;Keith, C. D. ;Keller, D. ;Khachatryan, G. ;Khandaker, M. ;Kim, A. ;Kim, W. ;Klein, A. ;Klein, F. J. ;Kubarovsky, V.; ;Lanza, L. ;Lenisa, P. ;Livingston, K. ;Lu, H. Y. ;Macgregor, I. J.D. ;Markov, N. ;Mayer, M. ;McCracken, M. E. ;McKinnon, B. ;Meekins, D. G. ;Meyer, C. A. ;Meziani, Z. E.; ;Mokeev, V. ;Montgomery, R. A. ;Movsisyan, A.Munoz Camacho, C.The photoproduction of ω mesons off the proton has been studied in the reaction γp → p ω using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target in Hall B at the Thomas Jefferson National Accelerator Facility. For the first time, the target asymmetry T has been measured in photoproduction from the decay ω → π+π−π0, using a transversely polarized target with energies ranging from just above the reaction threshold up to 2.8 GeV. Significant nonzero values are observed for these asymmetries, reaching about 30–40% in the third-resonance region. New measurements for the photon-beam asymmetry are also presented, which agree well with previous CLAS results and extend the world database up to 2.1 GeV. These data and additional ω photoproduction observables from CLAS were included in a partial-wave analysis within the Bonn-Gatchina framework. Significant contributions from s-channel resonance production were found in addition to t-channel exchange processes.Scopus© Citations 9 - PublicationMeasurement of exclusive π0 electroproduction structure functions and their relationship to transverse generalized parton distributions(2012-09-10)
;Bedlinskiy, I. ;Kubarovsky, V. ;Niccolai, S. ;Stoler, P. ;Adhikari, K. P. ;Aghasyan, M. ;Amaryan, M. J. ;Anghinolfi, M. ;Avakian, H. ;Baghdasaryan, H. ;Ball, J. ;Baltzell, N. A. ;Battaglieri, M. ;Bennett, R. P. ;Biselli, A. S. ;Bookwalter, C. ;Boiarinov, S. ;Briscoe, W. J.; ;Burkert, V. D. ;Carman, D. S. ;Celentano, A. ;Chandavar, S. ;Charles, G. ;Contalbrigo, M. ;Crede, V. ;D'Angelo, A. ;Daniel, A. ;Dashyan, N. ;De Vita, R. ;De Sanctis, E. ;Deur, A. ;Djalali, C. ;Doughty, D. ;Dupre, R. ;Egiyan, H. ;El Alaoui, A. ;El Fassi, L. ;Elouadrhiri, L. ;Eugenio, P. ;Fedotov, G. ;Fegan, S. ;Fleming, J. A. ;Forest, T. A. ;Fradi, A. ;Garçon, M. ;Gevorgyan, N. ;Giovanetti, K. L. ;Girod, F. X. ;Gohn, W. ;Gothe, R. W. ;Graham, L. ;Griffioen, K. A. ;Guegan, B. ;Guidal, M. ;Guo, L. ;Hafidi, K.; ;Hanretty, C. ;Heddle, D. ;Hicks, K. ;Holtrop, M. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jo, H. S. ;Joo, K. ;Keller, D. ;Khandaker, M. ;Khetarpal, P. ;Kim, A. ;Kim, W. ;Klein, F. J. ;Koirala, S. ;Kubarovsky, A. ;Kuhn, S. E.; ;Kvaltine, N. D. ;Livingston, K. ;Lu, H. Y. ;MacGregor, I. J.D. ;Mao, Y. ;Markov, N. ;Martinez, D. ;Mayer, M. ;McKinnon, B. ;Meyer, C. A. ;Mineeva, T. ;Mirazita, M. ;Mokeev, V. ;Moutarde, H. ;Munevar, E. ;Munoz Camacho, C. ;Nadel-Turonski, P. ;Niculescu, G. ;Niculescu, I. ;Osipenko, M. ;Ostrovidov, A. I.Pappalardo, L. L.Exclusive 0 electroproduction at a beam energy of 5.75 GeV has been measured with the Jefferson Lab CLAS spectrometer. Differential cross sections were measured at more than 1800 kinematic values in Q2, xB, t, and , in the Q2 range from 1.0 to 4:6 GeV2, t up to 2 GeV2, and xB from 0.1 to 0.58. Structure functions T þ L, TT, and LT were extracted as functions of t for each of 17 combinations of Q2 and xB. The data were compared directly with two handbag-based calculations including both longitudinal and transversity generalized parton distributions (GPDs). Inclusion of only longitudinal GPDs very strongly underestimates T þ L and fails to account for TT and LT, while inclusion of transversity GPDs brings the calculations into substantially better agreement with the data. There is very strong sensitivity to the relative contributions of nucleon helicity-flip and helicity nonflip processes. The results confirm that exclusive 0 electroproduction offers direct experimental access to the transversity GPDs.Scopus© Citations 64 - PublicationBranching ratio of the electromagnetic decay of the Σ +(1385)(2012-03-19)
;Keller, D. ;Hicks, K. ;Adhikari, K. P. ;Adikaram, D. ;Amaryan, M. J. ;Anghinolfi, M. ;Baghdasaryan, H. ;Ball, J. ;Battaglieri, M. ;Bedlinskiy, I. ;Biselli, A. S. ;Bookwalter, C. ;Boiarinov, S. ;Branford, D. ;Briscoe, W. J.; ;Burkert, V. D. ;Carman, D. S. ;Celentano, A. ;Chandavar, S. ;Cole, P. L. ;Contalbrigo, M. ;Crede, V. ;D'Angelo, A. ;Daniel, A. ;Dashyan, N. ;De Vita, R. ;De Sanctis, E. ;Djalali, C. ;Doughty, D. ;Dupre, R. ;El Alaoui, A. ;El Fassi, L. ;Elouadrhiri, L. ;Eugenio, P. ;Fedotov, G. ;Gabrielyan, M. Y. ;Gevorgyan, N. ;Gilfoyle, G. P. ;Giovanetti, K. L. ;Gohn, W. ;Golovatch, E. ;Gothe, R. W. ;Graham, L. ;Griffioen, K. A. ;Guidal, M. ;Guler, N. ;Guo, L. ;Hafidi, K.; ;Holtrop, M. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jo, H. S. ;Joo, K. ;Khandaker, M. ;Khetarpal, P. ;Kim, A. ;Kim, W. ;Klein, F. J. ;Kubarovsky, A. ;Kubarovsky, V.; ;Lu, H. Y. ;MacGregor, I. J.D. ;Mao, Y. ;Markov, N. ;Mayer, M. ;McKinnon, B. ;Meyer, C. A. ;Mineeva, T. ;Mirazita, M. ;Mokeev, V. ;Moutarde, H. ;Munevar, E. ;Nadel-Turonski, P. ;Nasseripour, R. ;Niccolai, S. ;Niculescu, G. ;Niculescu, I. ;Osipenko, M. ;Ostrovidov, A. I. ;Paolone, M. ;Pappalardo, L. ;Paremuzyan, R. ;Park, K. ;Park, S. ;Pasyuk, E. ;Anefalos Pereira, S. ;Pisano, S. ;Pogorelko, O. ;Pozdniakov, S. ;Procureur, S. ;Prok, Y. ;Protopopescu, D. ;Raue, B. A. ;Ricco, G.Rimal, D.The CLAS detector was used to obtain the first ever measurement of the electromagnetic decay of the þð1385Þ from the reaction p ! K0 þð1385Þ. A real photon beam with a maximum energy of 3.8 GeV was incident on a liquid-hydrogen target, resulting in the photoproduction of the kaon and hyperon. Kinematic fitting was used to separate the reaction channel from the background processes. The fitting algorithm exploited a new method to kinematically fit neutrons in the CLAS detector, leading to the measured decay widths ratio þð1385Þ ! þ =þð1385Þ ! þ0 ¼ 11:95 2:21ðstatÞ þ0:53 1:21ðsysÞ% and a deduced partial width of 250:0 56:9ðstatÞ þ34:3 41:2ðsysÞ keV. A U-spin symmetry test using the SU(3) flavor-multiplet representation yields predictions for the þð1385Þ ! þ and 0ð1385Þ ! partial widths that agree with the experimental measurementsScopus© Citations 15 - PublicationPrecision measurements of g1 of the proton and of the deuteron with 6 GeV electrons(2014-08-29)
;Prok, Y. ;Bosted, P. ;Kvaltine, N. ;Adhikari, K. P. ;Adikaram, D. ;Aghasyan, M. ;Amaryan, M. J. ;Anderson, M. D. ;Anefalos Pereira, S. ;Avakian, H. ;Baghdasaryan, H. ;Ball, J. ;Baltzell, N. A. ;Battaglieri, M. ;Biselli, A. S. ;Bono, J. ;Briscoe, W. J. ;Brock, J.; ;Bültmann, S. ;Burkert, V. D. ;Carlin, C. ;Carman, D. S. ;Celentano, A. ;Chandavar, S. ;Colaneri, L. ;Cole, P. L. ;Contalbrigo, M. ;Cortes, O. ;Crabb, D. ;Crede, V. ;D'Angelo, A. ;Dashyan, N. ;De Vita, R. ;De Sanctis, E. ;Deur, A. ;Djalali, C. ;Dodge, G. E. ;Doughty, D. ;Dupre, R. ;El Alaoui, A. ;El Fassi, L. ;Elouadrhiri, L. ;Fedotov, G. ;Fegan, S. ;Fersch, R. ;Fleming, J. A. ;Forest, T. A. ;Garçon, M. ;Garillon, B. ;Gevorgyan, N. ;Ghandilyan, Y. ;Gilfoyle, G. P. ;Girod, F. X. ;Giovanetti, K. L. ;Goetz, J. T. ;Gohn, W. ;Gothe, R. W. ;Griffioen, K. A. ;Guegan, B. ;Guler, N. ;Hafidi, K. ;Hanretty, C. ;Harrison, N. ;Hattawy, M. ;Hicks, K. ;Ho, D. ;Holtrop, M. ;Ilieva, Y. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jawalkar, S. ;Jiang, X. ;Jo, H. S. ;Joo, K. ;Kalantarians, N. ;Keith, C. ;Keller, D. ;Khandaker, M. ;Kim, A. ;Kim, W. ;Klein, A. ;Klein, F. J. ;Koirala, S. ;Kubarovsky, V. ;Kuhn, S. E.; ;Lenisa, P. ;Livingston, K. ;Lu, H. Y. ;Macgregor, I. J.D. ;Markov, N. ;Mayer, M. ;McKinnon, B. ;Meekins, D. ;Mineeva, T. ;Mirazita, M. ;Mokeev, V.Montgomery, R. A.The inclusive polarized structure functions of the proton and deuteron, g1p and g1d, were measured with high statistical precision using polarized 6 GeV electrons incident on a polarized ammonia target in Hall B at Jefferson Laboratory. Electrons scattered at lab angles between 18 and 45 degrees were detected using the CEBAF Large Acceptance Spectrometer (CLAS). For the usual DIS kinematics, Q^2>1 GeV^2 and the final-state invariant mass W>2 GeV, the ratio of polarized to unpolarized structure functions g1/F1 is found to be nearly independent of Q^2 at fixed x. Significant resonant structure is apparent at values of W up to 2.3 GeV. In the framework of perturbative QCD, the high-W results can be used to better constrain the polarization of quarks and gluons in the nucleon, as well as high-twist contributions.Scopus© Citations 45 - PublicationHard Two-Body Photodisintegration of He3(2013-06-14)
;Pomerantz, I. ;Ilieva, Y. ;Gilman, R. ;Higinbotham, D. W. ;Piasetzky, E. ;Strauch, S. ;Adhikari, K. P. ;Aghasyan, M. ;Allada, K. ;Amaryan, M. J. ;Anefalos Pereira, S. ;Anghinolfi, M. ;Baghdasaryan, H. ;Ball, J. ;Baltzell, N. A. ;Battaglieri, M. ;Batourine, V. ;Beck, A. ;Beck, S. ;Bedlinskiy, I. ;Berman, B. L. ;Biselli, A. S. ;Boeglin, W. ;Bono, J. ;Bookwalter, C. ;Boiarinov, S. ;Briscoe, W. J.; ;Bubis, N. ;Burkert, V. ;Camsonne, A. ;Canan, M. ;Carman, D. S. ;Celentano, A. ;Chandavar, S. ;Charles, G. ;Chirapatpimol, K. ;Cisbani, E. ;Cole, P. L. ;Contalbrigo, M. ;Crede, V. ;Cusanno, F. ;D'Angelo, A. ;Daniel, A. ;Dashyan, N. ;De Jager, C. W. ;De Vita, R. ;De Sanctis, E. ;Deur, A. ;Djalali, C. ;Dodge, G. E. ;Doughty, D. ;Dupre, R. ;Dutta, C. ;Egiyan, H. ;El Alaoui, A. ;El Fassi, L. ;Eugenio, P. ;Fedotov, G. ;Fegan, S. ;Fleming, J. A. ;Fradi, A. ;Garibaldi, F. ;Geagla, O. ;Gevorgyan, N. ;Giovanetti, K. L. ;Girod, F. X. ;Glister, J. ;Goetz, J. T. ;Gohn, W. ;Golovatch, E. ;Gothe, R. W. ;Griffioen, K. A. ;Guegan, B. ;Guidal, M. ;Guo, L. ;Hafidi, K.; ;Harrison, N. ;Heddle, D. ;Hicks, K. ;Ho, D. ;Holtrop, M. ;Hyde, C. E. ;Ireland, D. G. ;Ishkhanov, B. S. ;Isupov, E. L. ;Jiang, X. ;Jo, H. S. ;Joo, K. ;Katramatou, A. T. ;Keller, D. ;Khandaker, M. ;Khetarpal, P. ;Khrosinkova, E. ;Kim, A. ;Kim, W. ;Klein, F. J. ;Koirala, S.We have measured cross sections for the 3He ! pd reaction at photon energies of 0.4–1.4 GeV and a center-of-mass angle of 90 . We observe dimensional scaling above 0.7 GeV at this center-of-mass angle. This is the first observation of dimensional scaling in the photodisintegration of a nucleus heavier than the deuteron