Evidence for SU(3) symmetry breaking from hyperon production

被引：3

作者：

Yang, JJ

机构：

[1] Univ Tecn Federico Santa Maria, Dept Fis, Valparaiso, Chile

[2] Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China

来源：

PHYSICAL REVIEW D | 2002年 / 65卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.65.054026

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We examine the SU(3) symmetry breaking in hyperon semileptonic decays (HSD) by considering two typical sets of quark contributions to the spin content of the octet baryons: set 1 with SU(3) flavor symmetry and set 2 with SU(3) flavor symmetry breaking in the HSD. The quark distributions of the octet baryons are calculated with a successful statistical model. Using an approximate relation between the quark fragmentation functions and the quark distributions, we predict the polarizations of the octet baryons produced in e(+)e(-) annihilation and semi-inclusive deep lepton-nucleon scattering in order to reveal the SU(3) symmetry breaking effect on the spin structure of the octet baryons. We find that the SU(3) symmetry breaking significantly affects the hyperon polarization. The available experimental data on the Lambda polarization seem to favor the theoretical predictions with SU(3) symmetry breaking. We conclude that there is a possibility to get collateral evidence for SU(3) symmetry breaking from hyperon production. The theoretical errors for our predictions are discussed.

引用

页数：11

共 65 条

[1]

Ackerstaff K, 1998, EUR PHYS J C, V2, P49, DOI 10.1007/s100520050123

[2]

Adams MR, 2000, EUR PHYS J C, V17, P263, DOI 10.1007/s100520000493

[3]

Airapetian A, 2001, PHYS REV D, V64, DOI 10.1103/PhysRevD.64.112005

[4] AN INVESTIGATION OF THE SPIN STRUCTURE OF THE PROTON IN DEEP INELASTIC-SCATTERING OF POLARIZED MUONS ON POLARIZED PROTONS [J].

ASHMAN, J ;

BADELEK, B ;

BAUM, G ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BIRD, IG ;

BROWN, SC ;

CAPUTO, MC ;

CHEUNG, HWK ;

CHIMA, JS ;

CIBOROWSKI, J ;

CLIFFT, R ;

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 ;

GAMET, R ;

GIBSON, V ;

GILLIES, J ;

GRAFSTROM, P ;

HAMACHER, K ;

HARRACH, DV ;

HAYMAN, PJ ;

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 ;

MONTANET, F .

NUCLEAR PHYSICS B, 1989, 328 (01) :1-35

[5] Measurement of the Λ polarization in νμ charged current interactions in the NOMAD experiment [J].

Astier, P ;

Autiero, D ;

Baldisseri, A ;

Baldo-Ceolin, M ;

Banner, M ;

Bassompierre, G ;

Benslama, K ;

Besson, N ;

Bird, I ;

Blumenfeld, B ;

Bobisut, F ;

Bouchez, J ;

Boyd, S ;

Bueno, A ;

Bunyatov, S ;

Camilleri, L ;

Cardini, A ;

Cattaneo, PW ;

Cavasinni, V ;

Cervera-Villanueva, A ;

Chukanov, A ;

Collazuol, G ;

Conforto, G ;

Conta, C ;

Contalbrigo, M ;

Cousins, R ;

Daniels, D ;

Degaudenzi, H ;

Del Prete, T ;

De Santo, A ;

Dignan, T ;

Di Lella, L ;

Silva, EDE ;

Dumarchez, J ;

Ellis, M ;

Fazio, T ;

Feldman, GJ ;

Ferrari, R ;

Ferrère, D ;

Flaminio, V ;

Fraternali, M ;

Gaillard, JM ;

Gangler, E ;

Geiser, A ;

Geppert, D ;

Gibin, D ;

Gninenko, S ;

Godley, A ;

Gomez-Cadenas, JJ ;

Gosset, J .

NUCLEAR PHYSICS B, 2000, 588 (1-2) :3-36

[6] Measurement of the (λ)over-bar polarization in νμ charged current interactions in the NOMAD experiment [J].

Astier, P ;

Autiero, D ;

Baldisseri, A ;

Baldo-Ceolin, M ;

Banner, M ;

Bassompierre, G ;

Besson, N ;

Bird, I ;

Blumenfeld, B ;

Bobisut, F ;

Bouchez, J ;

Boyd, S ;

Bueno, A ;

Bunyatov, S ;

Camilleri, L ;

Cardini, A ;

Cattaneo, PW ;

Cavasinni, V ;

Cervera-Villanueva, A ;

Chukanov, A ;

Collazuol, G ;

Conforto, G ;

Conta, C ;

Contalbrigo, M ;

Cousins, R ;

Daniels, D ;

Degaudenzi, H ;

Del Prete, T ;

De Santo, A ;

Dignan, T ;

Di Lella, L ;

Silva, EDE ;

Dumarchez, J ;

Ellis, M ;

Fazio, T ;

Feldman, GJ ;

Ferrari, R ;

Ferrère, D ;

Flaminio, V ;

Fraternali, M ;

Gaillard, JM ;

Gangler, E ;

Geiser, A ;

Geppert, D ;

Gibin, D ;

Gninenko, S ;

Godley, A ;

Gomez-Cadenas, JJ ;

Gosset, J ;

Gössling, C .

NUCLEAR PHYSICS B, 2001, 605 (1-3) :3-14

[7] Particles and field .1. Review of particle physics [J].

Barnett, RM ;

Carone, CD ;

Groom, DE ;

Trippe, TG ;

Wohl, CG ;

Armstrong, B ;

Gee, PS ;

Wagman, GS ;

James, F ;

Mangano, M ;

Monig, K ;

Montanet, L ;

Feng, JL ;

Murayama, H ;

Hernandez, JJ ;

Manohar, A ;

AguilarBenitez, M ;

Caso, C ;

Crawford, RL ;

Roos, M ;

Tornqvist, NA ;

Hayes, KG ;

Hagiwara, K ;

Nakamura, K ;

Tanabashi, M ;

Olive, K ;

Honscheid, K ;

Burchat, PR ;

Shrock, RE ;

Eidelman, S ;

Schindler, RH ;

Gurtu, A ;

Hikasa, K ;

Conforto, G ;

Workman, RL ;

Grab, C ;

Amsler, C .

PHYSICAL REVIEW D, 1996, 54 (01) :1-+

[8] Connection between distribution and fragmentation functions [J].

Barone, V ;

Drago, A ;

Ma, BQ .

PHYSICAL REVIEW C, 2000, 62 (06) :4

[9] Statistical model for the nucleon structure functions [J].

Bhalerao, RS .

PHYSICS LETTERS B, 1996, 380 (1-2) :1-6

[10] Model for polarized and unpolarized parton density functions in the nucleon [J].

Bhalerao, RS ;

Kelkar, NG ;

Ram, B .

PHYSICS LETTERS B, 2000, 476 (3-4) :285-290

← 1 2 3 4 5 6 7 →