Electroproduction of Δ(1232) resonance at high momentum transfer

被引：0
|
作者：
Frolov, V [1 ]
机构：
[1] Rensselaer Polytech Inst, Dept Phys, Troy, NY 12180 USA
来源：
HADRON SPECTROSCOPY | 1998年 / 432期
关键词：
D O I：
暂无
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Jefferson Lab experiment E94-014 measured the the excitation of the Delta(1232) resonance at Q(2) near 2.8 and 4 Gev(2)/c(2) via the reaction p(e, e'p)pi(0). This is the highest Q(2) for which exclusive resonance electroproduction has ever been observed. Decay distributions of the Delta(1232) resonance into the p pi(0) final state were measured over a wide range of barycentric decay angles and energies. The goal of this experiment is to asses the transition in Q(2) from the constituent quark model (CQM) to the regime where hard processes become important. At Q(2) similar to few GeV2/c(2) the ratio E1+/M1+ depends dramatically on the theoretical description, varying from a few 10(-2) in the CQM, limit, to about 1 in the pQCD limit. Preliminary analysis of the data shows that the ratio E1+/M1+ remains small at Q(2) up to 4 Gev(2)/c(2). After first pass analysis we obtain E1+/M1+ = -4.1 +/- 1.2% at Q2 = 2.8 Gev2/c2 and E1+/M1+ = -7.9 +/- 0.8% at Q(2) = 4 Gev(2)/c(2) (statistical errors only).
引用
收藏
页码：793 / 796
页数：4
相关论文
共 50 条
  • [1] Electroproduction of the Δ(1232) resonance at high momentum transfer
    Frolov, VV
    Adams, GS
    Ahmidouch, A
    Armstrong, CS
    Assamagan, K
    Avery, S
    Baker, OK
    Bosted, P
    Burkert, V
    Carlini, R
    Davidson, RM
    Dunne, J
    Eden, T
    Ent, R
    Gaskell, D
    Guèye, P
    Hinton, W
    Keppel, C
    Kim, W
    Klusman, M
    Koltenuk, D
    Mack, D
    Madey, R
    Meekins, D
    Minehart, R
    Mitchell, J
    Mkrtchyan, H
    Mukhopadhyay, NC
    Napolitano, J
    Niculescu, G
    Niculescu, I
    Nozar, M
    Price, JW
    Stoler, P
    Tadevosian, V
    Tang, L
    Witkowski, M
    Wood, S
    PHYSICAL REVIEW LETTERS, 1999, 82 (01) : 45 - 48
  • [2] Pi(0) electroproduction of the Delta(1232) resonance at high momentum transferred
    Ungaro, Maurizio
    1600,
  • [3] Measurement of the N→Δ +(1232) transition at high-momentum transfer by π0 electroproduction
    Ungaro, M.
    Stoler, P.
    Aznauryan, I.
    Burkert, V. D.
    Joo, K.
    Smith, L. C.
    Adams, G.
    Amarian, M.
    Ambrozewicz, P.
    Anghinolfi, M.
    Asryan, G.
    Audit, G.
    Avakian, H.
    Bagdasaryan, H.
    Ball, J. P.
    Baltzell, N. A.
    Barrow, S.
    Batourine, V.
    Battaglieri, M.
    Bedliski, I.
    Bektasoglu, M.
    Bellis, M.
    Benmouna, N.
    Berman, B. L.
    Biselli, A. S.
    Bonner, B. E.
    Bouchigny, S.
    Boiarinov, S.
    Bradford, R.
    Branford, D.
    Briscoe, W. J.
    Brooks, W. K.
    Bultmann, S.
    Butuceanu, C.
    Calarco, J. R.
    Careccia, S. L.
    Carman, D. S.
    Cazes, A.
    Chen, S.
    Cole, P. L.
    Coltharp, P.
    Cords, D.
    Corvisiero, P.
    Crabb, D.
    Cummings, J. P.
    De Sanctis, E.
    DeVita, R.
    Degtyarenko, P. V.
    Denizli, H.
    Dennis, L.
    PHYSICAL REVIEW LETTERS, 2006, 97 (11)
  • [4] Electroproduction of the Δ(1232) and S11(1535) resonances at high momentum transfer.
    Stoler, P
    N(STAR) PHYSICS AND NONPERTURBATIVE QUANTUM CHROMODYNAMICS, 1999, 11 : 124 - 129
  • [5] Electroproduction of the N*(1535) Resonance at Large Momentum Transfer
    Braun, V. M.
    Goeckeler, M.
    Horsley, R.
    Kaltenbrunner, T.
    Lenz, A.
    Nakamura, Y.
    Pleiter, D.
    Rakow, P. E. L.
    Rohrwild, J.
    Schaefer, A.
    Schierholz, G.
    Stueben, H.
    Warkentin, N.
    Zanotti, J. M.
    PHYSICAL REVIEW LETTERS, 2009, 103 (07)
  • [6] Electroproduction of η mesons in the S11(1535) resonance region at high momentum transfer
    Dalton, M. M.
    Adams, G. S.
    Ahmidouch, A.
    Angelescu, T.
    Arrington, J.
    Asaturyan, R.
    Baker, O. K.
    Benmouna, N.
    Bertoncini, C.
    Boeglin, W. U.
    Bosted, P. E.
    Breuer, H.
    Christy, M. E.
    Connell, S. H.
    Cui, Y.
    Danagoulian, S.
    Day, D.
    Dodario, T.
    Dunne, J. A.
    Dutta, D.
    El Khayari, N.
    Ent, R.
    Fenker, H. C.
    Frolov, V. V.
    Gan, L.
    Gaskell, D.
    Hafidi, K.
    Hinton, W.
    Holt, R. J.
    Horn, T.
    Huber, G. M.
    Hungerford, E.
    Jiang, X.
    Jones, M. K.
    Joo, K.
    Kalantarians, N.
    Kelly, J. J.
    Keppel, C. E.
    Kubarovsky, V.
    Li, Y.
    Liang, Y.
    Malace, S.
    Markowitz, P.
    McKee, P.
    Meekins, D. G.
    Mkrtchyan, H.
    Moziak, B.
    Navasardyan, T.
    Niculescu, G.
    Niculescu, I.
    PHYSICAL REVIEW C, 2009, 80 (01)
  • [7] Coherent pion electroproduction on the deuteron in the Δ(1232) resonance region
    Th. Ebertshäuser
    H. Arenhövel
    The European Physical Journal A - Hadrons and Nuclei, 1999, 6 : 431 - 443
  • [8] Coherent pion electroproduction on the deuteron in the Δ(1232) resonance region
    Ebertshäuser, T
    Arenhövel, H
    EUROPEAN PHYSICAL JOURNAL A, 1999, 6 (04): : 431 - 443
  • [9] ELECTROPRODUCTION OF NUCLEON RESONANCES IN REGION OF HIGH MOMENTUM TRANSFER
    KUPSCH, J
    RUHL, W
    NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS, 1969, 64 (04): : 991 - +
  • [10] A COVARIANT FORMALISM FOR THE N* ELECTROPRODUCTION AT HIGH MOMENTUM TRANSFER
    Ramalho, G.
    Gross, F.
    Pena, M. T.
    Tsushima, K.
    EXCLUSIVE REACTIONS AT HIGH MOMENTUM TRANSFER IV, 2011, : 287 - 294
12345