Distribution amplitudes of Σ and Λ and their electromagnetic form factors

被引：39

作者：

Liu, Yong-Lu ^{[1
]}

Huang, Ming-Qiu ^{[1
]}

机构：

[1] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China

来源：

NUCLEAR PHYSICS A | 2009年 / 821卷

基金：

中国国家自然科学基金;

关键词：

Conformal expansion; Distribution amplitude; Light cone sum rules; Electromagnetic form factor; TWIST DISTRIBUTION AMPLITUDES; EXCLUSIVE PROCESSES; RESONANCE PHYSICS; WAVE-FUNCTIONS; VECTOR-MESONS; SUM-RULES; QCD; BARYONS; NEUTRON; ELECTROPRODUCTION;

D O I：

10.1016/j.nuclphysa.2009.02.003

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：

Based on QCD conformal partial wave expansion to leading order conformal spin accuracy, we present the light-cone distribution amplitudes (DAs) of Sigma and Lambda baryons up to twist 6. It is concluded that fourteen independent DAs are needed to describe the valence three-quark states of the baryons at small transverse separations. The nonperturbative parameters relevant to the DAs are determined within the framework of QCD sum rule method. With the obtained DAs, a simple investigation on the electromagnetic form factors of these baryons are given. The magnetic moments of the baryons are estimated by fitting the magnetic form factor with the dipole formula. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：80 / 105

页数：26

共 77 条

[1] Higher twist distribution amplitudes of the pion and electromagnetic form factor Fπ(Q2) -: art. no. 074020
Agaev, SS
[J]. PHYSICAL REVIEW D, 2005, 72 (07):
[2] Octet baryon magnetic moments in light cone QCD sum rules (vol 66, art no 016002, 2002) -: art. no. 039901
Aliev, TM
Özpineci, A
Savci, M
[J]. PHYSICAL REVIEW D, 2003, 67 (03):
[3] Octet baryon magnetic moments in light cone QCD sum rules
Aliev, TM
Ozpineci, A
Savci, M
[J]. PHYSICAL REVIEW D, 2002, 66 (01) : 160021 - 1600210
[4] ALIEV TM, ARXIV08023008V2
[5] Review of particle physics
Amsler, C.
Doser, M.
Antonelli, M.
Asner, D. M.
Babu, K. S.
Baer, H.
Band, H. R.
Barnett, R. M.
Bergren, E.
Beringer, J.
Bernardi, G.
Bertl, W.
Bichsel, H.
Biebel, O.
Bloch, P.
Blucher, E.
Blusk, S.
Cahn, R. N.
Carena, M.
Caso, C.
Cecccci, A.
Chakraborty, D.
Chen, M. -C.
Chivukula, R. S.
Cowan, G.
Dahl, O.
D'Ambrosio, G.
Damour, T.
de Gouvea, A.
DeGrand, T.
Dobrescu, B.
Drees, M.
Edwards, D. A.
Eidelman, S.
Elvira, V. D.
Erler, J.
Ezhela, V. V.
Feng, J. L.
Fetscher, W.
Fields, B. D.
Foster, B.
Gaisser, T. K.
Garren, L.
Gerber, H. -J.
Gerbier, G.
Gherghetta, T.
Giudice, G. F.
Goodman, M.
Grab, C.
Gritsan, A. V.
[J]. PHYSICS LETTERS B, 2008, 667 (1-5) : 1 - +
[6] MEASUREMENTS OF THE ELECTRIC AND MAGNETIC FORM-FACTORS OF THE PROTON FROM Q(2)=1.75 TO 8.83 (GEV/C)(2)
ANDIVAHIS, L
BOSTED, PE
LUNG, A
STUART, LM
ALSTER, J
ARNOLD, RG
CHANG, CC
DIETRICH, FS
DODGE, W
GEARHART, R
GOMEZ, J
GRIFFIOEN, KA
HICKS, RS
HYDEWRIGHT, CE
KEPPEL, C
KUHN, SE
LICHTENSTADT, J
MISKIMEN, RA
PETERSON, GA
PETRATOS, GG
ROCK, SE
ROKNI, S
SAKUMOTO, WK
SPENGOS, M
SWARTZ, K
SZALATA, Z
TAO, LH
[J]. PHYSICAL REVIEW D, 1994, 50 (09) : 5491 - 5517
[7] Precise measurements of the neutron magnetic form factor
Anklin, H
deBever, LJ
Blomqvist, KI
Boeglin, WU
Bohm, R
Distler, M
Edelhoff, R
Friedrich, J
Fritschi, D
Geiges, R
Gotz, J
Honegger, A
Jennewein, P
Jourdan, J
Kahrau, M
Korn, M
Kramer, H
Krygier, KW
Kubon, G
Kunde, V
Liesenfeld, A
Masson, G
Merle, K
Neuhausen, R
Offermann, EAJM
Petitjean, T
Pospischil, T
Potokar, M
Qin, LM
Richter, AW
Rokavec, A
Rosner, G
Sauer, P
Schardt, S
Sick, I
Sirca, S
Trueb, P
Tuccillo, M
Vodenik, B
Wagner, A
Walcher, T
Warren, G
Wolf, S
Zhao, J
Zeier, M
Zihlmann, B
[J]. PHYSICS LETTERS B, 1998, 428 (3-4) : 248 - 253
[8] How well do we know the electromagnetic form factors of the proton?
Arrington, J
[J]. PHYSICAL REVIEW C, 2003, 68 (03): : 343251 - 3432514
[9] BALITSKII YY, 1986, SOV J NUCL PHYS+, V44, P1028
[10] BALITSKII YY, 1988, SOV J NUCL PHYS+, V48, P546

← 1 2 3 4 5 6 7 8 →