Measurement and origin of the (u)over-bar,(d)over-bar asymmetry in the nucleon sea

被引：1
作者：
Garvey, GT [1 ]
机构：
[1] Univ Calif Los Alamos Natl Lab, Div Phys, Los Alamos, NM 87545 USA
来源：
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 44: ELECTROMAGNETIC PROBES AND THE STRUCTURE OF HALDRONS AND NUCLEI | 2000年 / 44卷
关键词：
D O I：
10.1016/S0146-6410(00)00079-X
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：
The distribution of light anti-quarks in the nucleon sea and the origin of the observed ū, d̄ flavor asymmetry are examined. A definite state on the integral properties of the parton distributions in the proton and neutron is formulated based on the charge and baryon number conservation. Results show that there is a sizable excess of d̄ relative to ū in the sea of photon and by charge symmetry, and an excess of ū relative to d̄ in the neutron.
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页码：305 / 312
页数：8
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共 35 条
  • [1] 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
  • [2] Polarised quark distributions in the nucleon from semi-inclusive spin asymmetries
    Adeva, B
    Akdogan, T
    Arik, E
    Arvidson, A
    Badelek, B
    Bardin, G
    Baum, G
    Berglund, P
    Betev, L
    Birsa, R
    de Botton, N
    Bradamante, F
    Bravar, A
    Bressan, A
    Bultmann, S
    Burtin, E
    Crabb, D
    Cranshaw, J
    Cuhadar, T
    Dalla Torre, S
    van Dantzig, R
    Derro, B
    Deshpande, A
    Dhawan, S
    Dulya, C
    Eichblatt, S
    Fasching, D
    Feinstein, F
    Fernandez, C
    Forthmann, S
    Frois, B
    Gallas, A
    Garzon, JA
    Gilly, H
    Giorgi, M
    von Goeler, E
    Goertz, S
    Gracia, G
    de Groot, N
    Grosse Perdekamp, M
    Haft, K
    von Harrach, D
    Hasegawa, T
    Hautle, P
    Hayashi, N
    Heusch, CA
    Horikawa, N
    Hughes, VW
    Igo, G
    Ishimoto, S
    [J]. PHYSICS LETTERS B, 1998, 420 (1-2) : 180 - 190
  • [3] 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
  • [4] REEVALUATION OF THE GOTTFRIED SUM
    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
    VONHARRACH, D
    VANDERHEIJDEN, M
    HEUSCH, C
    INGRAM, Q
    JANSONPRYTZ, K
    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
    NASSALSKI, J
    OBERSKI, J
    NOWOTNY, D
    PAIC, A
    PERONI, C
    POVH, B
    RIEGER, R
    RITH, K
    ROHRICH, K
    RONDIO, E
    ROPELEWSKI
    [J]. PHYSICAL REVIEW D, 1994, 50 (01): : R1 - R3
  • [5] STUDY OF THE ISOSPIN SYMMETRY-BREAKING IN THE LIGHT-QUARK SEA OF THE NUCLEON FROM THE DRELL-YAN PROCESS
    BALDIT, A
    BARRIERE, C
    CASTOR, J
    CHAMBON, T
    DEVAUX, A
    ESPAGNON, B
    FARGEIX, J
    FORCE, P
    LANDAUD, G
    SATURNINI, P
    VAZEILLE, F
    SONDEREGGER, P
    ABREU, MC
    BORDALO, P
    FERREIRA, R
    LOURENCO, C
    RAMOS, S
    SILVA, S
    VARELA, J
    GERSCHEL, C
    JOUAN, D
    TARRAGO, X
    CHAURAND, B
    KLUBERG, L
    ROMANA, A
    GORODETZKY, P
    LAZIC, D
    MAZINI, R
    RACCA, C
    ALESSANDRO, B
    CHIAVASSA, E
    DELLACASA, G
    GALLIO, M
    GIUBELLINO, P
    GUAITA, P
    MARZARICHIESA, A
    MASERA, M
    MONTENO, M
    MUSSO, A
    RAMELLO, L
    RICCATI, L
    SCOMPARIN, E
    VERCELLIN, E
    BEDJIDIAN, M
    CONTARDO, D
    DESCROIX, E
    DRAPIER, O
    GROSSIORD, JY
    GUICHARD, A
    HAROUTUNIAN, R
    [J]. PHYSICS LETTERS B, 1994, 332 (1-2) : 244 - 250
  • [6] The antiquark polarization inside the proton is small
    Cheng, TP
    Li, LF
    [J]. PHYSICS LETTERS B, 1996, 366 (1-4) : 365 - 370
  • [7] FLAVOR AND SPIN CONTENTS OF THE NUCLEON IN THE QUARK-MODEL WITH CHIRAL-SYMMETRY
    CHENG, TP
    LI, LF
    [J]. PHYSICAL REVIEW LETTERS, 1995, 74 (15) : 2872 - 2875
  • [8] DRELL SD, 1971, PHYS REV LETT, V25, P316
  • [9] FLAVOR ASYMMETRY OF THE NUCLEON SEA - CONSEQUENCES FOR DILEPTON PRODUCTION
    EICHTEN, EJ
    HINCHLIFFE, I
    QUIGG, C
    [J]. PHYSICAL REVIEW D, 1993, 47 (03): : R747 - R750
  • [10] FLAVOR ASYMMETRY IN THE LIGHT-QUARK SEA OF THE NUCLEON
    EICHTEN, EJ
    HINCHLIFFE, I
    QUIGG, C
    [J]. PHYSICAL REVIEW D, 1992, 45 (07): : 2269 - 2275
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