Electroproduction of the Δ(1232) resonance at high momentum transfer

被引：213

作者：

Frolov, VV

Adams, GS

Ahmidouch, A

Armstrong, CS

Assamagan, K

Avery, S

Baker, OK

Bosted, P

Burkert, V

Carlini, R

Davidson, RM

Dunne, J

Eden, T

Ent, R

Gaskell, D

Guèye, P

Hinton, W

Keppel, C

Kim, W

Klusman, M

Koltenuk, D

Mack, D

Madey, R

Meekins, D

Minehart, R

Mitchell, J

Mkrtchyan, H

Mukhopadhyay, NC

Napolitano, J

Niculescu, G

Niculescu, I

Nozar, M

Price, JW

Stoler, P

Tadevosian, V

Tang, L

Witkowski, M

Wood, S

机构：

[1] Rensselaer Polytech Inst, Dept Phys, Troy, NY 12180 USA

[2] American Univ, Dept Phys, Washington, DC 20016 USA

[3] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

[4] Hampton Univ, Dept Phys, Hampton, VA 23668 USA

[5] Kent State Univ, Dept Phys, Kent, OH 44242 USA

[6] Kyungpook Natl Univ, Dept Phys, Taegu 702701, South Korea

[7] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA

[8] Univ Penn, Dept Phys, Philadelphia, PA 19104 USA

[9] Univ Virginia, Dept Phys, Charlottesville, VA 22903 USA

[10] Yerevan Phys Inst, Yerevan 375036, Armenia

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.82.45

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We studied the electroproduction of the Delta(1232) resonance via the reaction p(e,e'p) pi(0) at four-momentum transfers Q(2) = 2.8 and 4.0 GeV2. This is the highest Q(2) for which exclusive resonance electroproduction has ever been observed. Decay angular distributions for Delta --> p pi(0) were measured over a wide range of barycentric energies covering the resonance. The N-Delta transition form factor G(M)* and ratios of resonant multipoles E1+/M1+ and S1+/M1+ were extracted from the decay angular distributions. These ratios remain small, indicating that perturbative QCD is not applicable for this reaction at these momentum transfers. [S0031-9007(98)08126-5].

引用

页码：45 / 48

页数：4

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