Quadrupole moments of N and Δ in the 1/Nc expansion -: art. no. 056002

被引：68

作者：

Buchmann, AJ ^{[1
]}

Hester, JA

Lebed, RF

机构：

[1] Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany

[2] Arizona State Univ, Dept Phys & Astron, Tempe, AZ 85287 USA

来源：

PHYSICAL REVIEW D | 2002年 / 66卷 / 05期

关键词：

D O I：

10.1103/PhysRevD.66.056002

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate expressions for the quadrupole moments of nonstrange baryons in which the number of QCD color charges is N-c. Using only the assumption of single-photon exchange, we obtain 4 relations among the 6 moments, and show how all of them may be obtained from Q(Delta)+p up to O(1/N-c(2)) corrections. We compare to the N-c=3 case, and obtain relations between the neutron charge radius and quadrupole moments. We also discuss prospects for the measurement of these moments.

引用

页数：7

共 60 条

[1] ANOMALIES AND CHARGE QUANTIZATION IN THE STANDARD MODEL WITH ARBITRARY NUMBER OF COLORS [J].

ABBAS, A .

PHYSICS LETTERS B, 1990, 238 (2-4) :344-347

[2] Model-independent predictions for low energy isoscalar heavy baryon observables in the combined heavy quark and large Nc expansion [J].

Baccouche, ZA ;

Chow, CK ;

Cohen, TD ;

Gelman, BA .

PHYSICS LETTERS B, 2001, 514 (3-4) :346-354

[3] Nucleon-nucleon interaction and large Nc QCD -: art. no. 034011 [J].

Banerjee, MK ;

Cohen, TD ;

Gelman, BA .

PHYSICAL REVIEW C, 2002, 65 (03) :15

[4] Measurement of the Beam-Helicity asymmetry in the p((e)over-right-arrow,e′p)π0 reaction at the energy of the Δ(1232) resonance -: art. no. 142001 [J].

Bartsch, P ;

Baumann, D ;

Bermuth, J ;

Böhm, R ;

Bohinc, K ;

Bosnar, D ;

Ding, M ;

Distler, M ;

Drechsel, D ;

Elsner, D ;

Ewald, I ;

Friedrich, J ;

Friedrich, JM ;

Grözinger, S ;

Hedicke, S ;

Jennewein, P ;

Kahrau, M ;

Kamalov, SS ;

Klein, F ;

Krygier, KW ;

Liesenfeld, A ;

Merkel, H ;

Merle, P ;

Müller, U ;

Neuhausen, R ;

Pospischil, T ;

Potokar, M ;

Rosner, G ;

Schmieden, H ;

Seimetz, M ;

Süle, A ;

Tiator, L ;

Wagner, A ;

Walcher, T ;

Weis, M .

PHYSICAL REVIEW LETTERS, 2002, 88 (14) :4

[5] SPIN OSCILLATION AND THE POSSIBILITY OF QUADRUPOLE-MOMENT MEASUREMENT FOR OMEGA(-)-HYPERONS MOVING IN A CRYSTAL [J].

BARYSHEVSKY, VG ;

SHECHTMAN, AG .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 1993, 83 (1-2) :250-254

[6] Measurement of the E2/M1 ratio in the N->Delta transition using the reaction p((gamma)over-right-arrow,p)pi(0) [J].

Beck, R ;

Krahn, HP ;

Ahrens, J ;

Arends, HJ ;

Audit, G ;

Braghieri, A ;

dHose, N ;

Hall, SJ ;

Isbert, V ;

Kellie, JD ;

MacGregor, IJD ;

Pedroni, P ;

Pinelli, T ;

Tamas, G ;

Walcher, T ;

Wartenberg, S .

PHYSICAL REVIEW LETTERS, 1997, 78 (04) :606-609

[7] Baryon masses at second order in large-N chiral perturbation theory [J].

Bedaque, PF ;

Luty, MA .

PHYSICAL REVIEW D, 1996, 54 (03) :2317-2327

[8]

Belitsky AV, 2002, PHYS REV C, V65, DOI 10.1103/PhysRevC.65.064008

[9] N→Δ transition and proton polarizabilities from measurements of p((gamma)over-right-arrow,γ), p((gamma)over-right-arrow,π0), and p((gamma)over-right-arrow,π+) -: art. no. 025203 [J].

Blanpied, G ;

Blecher, M ;

Caracappa, A ;

Deininger, R ;

Djalali, C ;

Giordano, G ;

Hicks, K ;

Hoblit, S ;

Khandaker, M ;

Kistner, OC ;

Kuczewski, A ;

Lincoln, F ;

Lowry, M ;

Lucas, M ;

Matone, G ;

Miceli, L ;

Preedom, BM ;

Rebreyend, D ;

Sandorfi, AM ;

Schaerf, C ;

Sealock, RM ;

Ströher, H ;

Thorn, CE ;

Thornton, ST ;

Tonnison, J ;

Whisnant, CS ;

Zhang, H ;

Zhao, X .

PHYSICAL REVIEW C, 2001, 64 (02)

[10]

Bohr A., 1998, Nuclear Structure, Volume 2: Nuclear Deformations, V2

← 1 2 3 4 5 6 →