Structure of the nucleon in the unquenched quark model

被引：2
作者：
Bijker, Roelof [1 ]
Santopinto, Elena [2 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, AP 70-543, Mexico City 04510, DF, Mexico
[2] Ist Nazl Fis Nucl, I-16164 Genoa, Italy
来源：
XXXIII SYMPOSIUM ON NUCLEAR PHYSICS | 2010年 / 239卷
关键词：
FLAVOR ASYMMETRY; SYMMETRY-BREAKING; ANGULAR-MOMENTUM; HADRONIC LOOPS; SPIN STRUCTURE; PROTON; SEA; DECAYS;
D O I：
10.1088/1742-6596/239/1/012009
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：
We discuss the flavor asymmetry of the nucleon sea and the spin content of the proton in an unquenched quark model. It is shown that the inclusion of hadron loops leads automatically to an excess of (d) over bar over (u) over bar and introduces a sizeable contribution of orbital angular momentum to the spin of the proton and the A hyperon. Special attention is paid to the symmetries of the unquenched quark model.
引用
收藏
页数：6
相关论文
共 37 条
  • [1] Precision measurements of the nucleon strange form factors at Q2∼0.1 GeV2
    Acha, A.
    Aniol, K. A.
    Armstrong, D. S.
    Arrington, J.
    Averett, T.
    Bailey, S. L.
    Barber, J.
    Beck, A.
    Benaoum, H.
    Benesch, J.
    Bertin, P. Y.
    Bosted, P.
    Butaru, F.
    Burtin, E.
    Cates, G. D.
    Chao, Y. -C.
    Chen, J. -P.
    Chudakov, E.
    Cisbani, E.
    Craver, B.
    Cusanno, F.
    De Leo, R.
    Decowski, P.
    Deur, A.
    Feuerbach, R. J.
    Finn, J. M.
    Frullani, S.
    Fuchs, S. A.
    Fuoti, K.
    Gilman, R.
    Glesener, L. E.
    Grimm, K.
    Grames, J. M.
    Hansen, J. O.
    Hansknecht, J.
    Higinbotham, D. W.
    Holmes, R.
    Holmstrom, T.
    Ibrahim, H.
    de Jager, C. W.
    Jiang, X.
    Katich, J.
    Kaufman, L. J.
    Kelleher, A.
    King, P. M.
    Kolarkar, A.
    Kowalski, S.
    Kuchina, E.
    Kumar, K. S.
    Lagamba, L.
    [J]. PHYSICAL REVIEW LETTERS, 2007, 98 (03)
  • [2] Flavor asymmetry of the light quark sea from semi-inclusive deep-inelastic scattering
    Ackerstaff, K
    Airapetian, A
    Akopov, N
    Akushevich, I
    Amarian, M
    Ashenauer, EC
    Avakian, H
    Avakian, R
    Avetissian, A
    Bains, B
    Baumgarten, C
    Beckmann, M
    Belostotski, S
    Belz, JE
    Benisch, T
    Bernreuther, S
    Bianchi, N
    Blouw, J
    Böttcher, H
    Borissov, A
    Brack, J
    Brauksiepe, S
    Braun, B
    Bray, B
    Brons, S
    Brückner, W
    Brüll, A
    Bruins, EEW
    Bulten, KJ
    Cadman, RV
    Capitani, GP
    Carter, P
    Chumney, P
    Cisbani, E
    Court, GR
    Dalpiaz, PF
    De Sanctis, E
    De Schepper, D
    Devitsin, E
    Huberts, PKAD
    Di Nezza, P
    Düren, M
    Dvoredsky, A
    Elbakian, G
    Fantoni, A
    Fechtchenko, A
    Ferstl, M
    Fiedler, K
    Filippone, BW
    Fischer, H
    [J]. PHYSICAL REVIEW LETTERS, 1998, 81 (25) : 5519 - 5523
  • [3] Precise determination of the spin structure function g1 of the proton, deuteron, and neutron
    Airapetian, A.
    Akopov, N.
    Akopov, Z.
    Andrus, A.
    Aschenauer, E. C.
    Augustyniak, W.
    Avakian, R.
    Avetissian, A.
    Avetissian, E.
    Belostotski, S.
    Bianchi, N.
    Blok, H. P.
    Boettcher, H.
    Borissov, A.
    Borysenko, A.
    Brull, A.
    Bryzgalov, V.
    Capiluppi, M.
    Capitani, G. P.
    Ciullo, G.
    Contalbrigo, M.
    Dalpiaz, P. F.
    Deconinck, W.
    De Leo, R.
    Demey, M.
    De Nardo, L.
    De Sanctis, E.
    Devitsin, E.
    Diefenthaler, M.
    Di Nezza, P.
    Dreschler, J.
    Dueren, M.
    Ehrenfried, M.
    Elalaoui-Moulay, A.
    Elbakian, G.
    Ellinghaus, F.
    Elschenbroich, U.
    Fabbri, R.
    Fantoni, A.
    Felawka, L.
    Frullani, S.
    Funel, A.
    Gabbert, D.
    Gaerber, Y.
    Gapienko, G.
    Gapienko, V.
    Garibaldi, F.
    Garrow, K.
    Gavrilov, G.
    Gharibyan, V.
    [J]. PHYSICAL REVIEW D, 2007, 75 (01):
  • [4] Determination of flavor asymmetry for Sigma(+/-) by the Drell-Yan process
    Alberg, M
    Henley, EM
    Ji, XD
    Thomas, AW
    [J]. PHYSICS LETTERS B, 1996, 389 (02) : 367 - 373
  • [5] The deuteron spin-dependent structure function g1d and its first moment
    Alexakhin, V. Yu.
    Alexandrov, Yu.
    Alexeev, G. D.
    Alexeev, M.
    Amoroso, A.
    Badelek, B.
    Balestra, F.
    Ball, J.
    Barth, J.
    Baum, G.
    Becker, M.
    Bedfer, Y.
    Bernet, C.
    Bertini, R.
    Bettinelli, M.
    Birsa, R.
    Bisplinghoff, J.
    Bordalo, P.
    Bradamante, F.
    Bressan, A.
    Brona, G.
    Burtin, E.
    Bussa, M. P.
    Bytchkov, V. N.
    Chapiro, A.
    Cicuttin, A.
    Colantoni, M.
    Colavita, A. A.
    Costa, S.
    Crespo, M. L.
    d'Hose, N.
    Dalla Torre, S.
    Das, S.
    Dasgupta, S. S.
    De Masi, R.
    Dedek, N.
    Demchenko, D.
    Denisov, O. Yu.
    Dhara, L.
    Diaz, V.
    Dinkelbach, A. M.
    Donskov, S. V.
    Dorofeev, V. A.
    Doshita, N.
    Duic, V.
    Duennweber, W.
    Efremov, A.
    Eversheim, P. D.
    Eyrich, W.
    Faessler, M.
    [J]. PHYSICS LETTERS B, 2007, 647 (01) : 8 - 17
  • [6] GOTTFRIED SUM FROM THE RATIO F2(N)/F2(P)
    AMAUDRUZ, P
    ARNEODO, M
    ARVIDSON, A
    BADELEK, B
    BAUM, G
    BEAUFAYS, J
    BIRD, IG
    BOTJE, M
    BROGGINI, C
    BRUCKNER, W
    BRULL, A
    BURGER, WJ
    CIBOROWSKI, J
    CRITTENDEN, R
    VANDANTZIG, R
    DOBBELING, H
    DOMINGO, J
    DRINKARD, J
    DZIERBA, A
    ENGELIEN, H
    FERRERO, MI
    FLURI, L
    GRAFSTROM, P
    VONHARRACH, D
    VANDERHEIJDEN, M
    HEUSCH, C
    INGRAM, Q
    JACHOLKOWSKA, A
    JANSON, K
    DEJONG, M
    KABUSS, EM
    KAISER, R
    KETEL, TJ
    KLEIN, F
    KORZEN, B
    KRUNER, U
    KULLANDER, S
    LANDGRAF, U
    LETTENSTROM, T
    LINDQVIST, T
    MALLOT, GK
    MARIOTTI, C
    VANMIDDELKOOP, G
    MIZUNO, Y
    NASSALSKI, J
    NOWOTNY, D
    PAVEL, N
    PESCHEL, H
    PERONI, C
    POVH, B
    [J]. PHYSICAL REVIEW LETTERS, 1991, 66 (21) : 2712 - 2715
  • [7] Accurate measurement of F-2(d)/F-2(p) and R(d)-R(p)
    Arneodo, M
    Arvidson, A
    Badelek, B
    Ballintijn, M
    Baum, G
    Beaufays, J
    Bird, IG
    Bjorkholm, P
    Botje, M
    Broggini, C
    Bruckner, W
    Brull, A
    Burger, WJ
    Ciborowski, J
    vanDantzig, R
    Dyring, A
    Engelien, H
    Ferrero, MI
    Fluri, L
    Gaul, U
    Granier, T
    GrossePerdekamp, M
    vonHarrach, D
    vanderHeijden, M
    Heusch, C
    Ingram, Q
    deJong, M
    Kabuss, EM
    Kaiser, R
    Ketel, TJ
    Klein, F
    Kullander, S
    Landgraf, U
    Lindqvist, T
    Mallot, GK
    Mariotti, C
    vanMiddelkoop, G
    Milsztajn, A
    Mizuno, Y
    Most, A
    Mucklich, A
    Nassalski, J
    Nowotny, D
    Oberski, J
    Paic, A
    Peroni, C
    Povh, B
    Prytz, K
    Rieger, R
    Rith, K
    [J]. NUCLEAR PHYSICS B, 1997, 487 (1-2) : 3 - 26
  • [8] A MEASUREMENT OF THE SPIN ASYMMETRY AND DETERMINATION OF THE STRUCTURE-FUNCTION G1 IN DEEP INELASTIC MUON PROTON-SCATTERING
    ASHMAN, J
    BADELEK, B
    BAUM, G
    BEAUFAYS, J
    BEE, CP
    BENCHOUK, C
    BIRD, IG
    BROWN, SC
    CAPUTO, MC
    CHEUNG, HWK
    CHIMA, J
    CIBOROWSKI, J
    CLIFFT, RW
    COIGNET, G
    COMBLEY, F
    COURT, G
    DAGOSTINI, G
    DREES, J
    DUREN, M
    DYCE, N
    EDWARDS, AW
    EDWARDS, M
    ERNST, T
    FERRERO, MI
    FRANCIS, D
    GABATHULER, E
    GAJEWSKI, J
    GAMET, R
    GIBSON, V
    GILLIES, J
    GRAFSTROM, P
    HAMACHER, K
    VONHARRACH, D
    HAYMAN, P
    HOLT, JR
    HUGHES, VW
    JACHOLKOWSKA, A
    JONES, T
    KABUSS, EM
    KORZEN, B
    KRUNER, U
    KULLANDER, S
    LANDGRAF, U
    LANSKE, D
    LETTENSTROM, F
    LINDQVIST, T
    LOKEN, J
    MATTHEWS, M
    MIZUNO, Y
    MONIG, K
    [J]. PHYSICS LETTERS B, 1988, 206 (02) : 364 - 370
  • [9] Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction
    Aznauryan, I. G.
    Burkert, V. D.
    Biselli, A. S.
    Egiyan, H.
    Joo, K.
    Kim, W.
    Park, K.
    Smith, L. C.
    Ungaro, M.
    Adhikari, K. P.
    Anghinolfi, M.
    Avakian, H.
    Ball, J.
    Battaglieri, M.
    Batourine, V.
    Bedlinskiy, I.
    Bellis, M.
    Bookwalter, C.
    Branford, D.
    Briscoe, W. J.
    Brooks, W. K.
    Careccia, S. L.
    Carman, D. S.
    Cole, P. L.
    Collins, P.
    Crede, V.
    D'Angelo, A.
    Daniel, A.
    De Vita, R.
    De Sanctis, E.
    Deur, A.
    Dey, B.
    Dhamija, S.
    Dickson, R.
    Djalali, C.
    Doughty, D.
    Dupre, R.
    El Alaoui, A.
    Elouadrhiri, L.
    Eugenio, P.
    Fedotov, G.
    Fegan, S.
    Forest, T. A.
    Gabrielyan, M. Y.
    Gilfoyle, G. P.
    Giovanetti, K. L.
    Girod, F. X.
    Goetz, J. T.
    Gohn, W.
    Golovatch, E.
    [J]. PHYSICAL REVIEW C, 2009, 80 (05):
  • [10] Electroexcitation of the Roper resonance for 1.7<Q2<4.5 GeV2 in ep→enπ+
    Aznauryan, I. G.
    Burkert, V. D.
    Kim, W.
    Park, K.
    Adams, G.
    Amaryan, M. J.
    Ambrozewicz, P.
    Anghinolfi, M.
    Asryan, G.
    Avakian, H.
    Bagdasaryan, H.
    Baillie, N.
    Ball, J. P.
    Baltzell, N. A.
    Barrow, S.
    Batourine, V.
    Battaglieri, M.
    Bedlinskiy, I.
    Bektasoglu, M.
    Bellis, M.
    Benmouna, N.
    Berman, B. L.
    Biselli, A. S.
    Blaszczyk, L.
    Bonner, B. E.
    Bookwalter, C.
    Bouchigny, S.
    Boiarinov, S.
    Bradford, R.
    Branford, D.
    Briscoe, W. J.
    Brooks, W. K.
    Bueltmann, S.
    Butuceanu, C.
    Calarco, J. R.
    Careccia, S. L.
    Carman, D. S.
    Casey, L.
    Cazes, A.
    Chen, S.
    Cheng, L.
    Cole, P. L.
    Collins, P.
    Coltharp, P.
    Cords, D.
    Corvisiero, P.
    Crabb, D.
    Crede, V.
    Cummings, J. P.
    Dale, D.
    [J]. PHYSICAL REVIEW C, 2008, 78 (04):
1234