Measurement of separated structure functions in the p(e,e′p)π0 reaction at threshold and chiral perturbation theory

被引：29

作者：

Distler, MO ^{[1
]}

Bernstein, AM

Blomqvist, KI

Boeglin, WU

Bohm, R

Edelhoff, R

Friedrich, J

Geiges, R

Kahrau, M

Korn, M

Kramer, H

Krygier, KW

Kunde, V

Kuss, M

Liesenfeld, A

Merkel, H

Merle, K

Neuhausen, R

Pospischil, T

Potokar, M

Rokavec, A

Richter, AW

Rosner, C

Sauer, P

Schardt, S

Schmieden, H

Sirca, S

Vodenik, B

Wagner, A

Walcher, T

Wolf, S

机构：

[1] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[2] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[3] Univ Ljubljana, Jozef Stefan Inst, SI-1001 Ljubljana, Slovenia

[4] MIT, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.80.2294

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The reaction p(e,e'p)pi(0) has been studied very close to threshold Delta W less than or equal to 4 MeV and at 4-momentum transfer Q(2) = 0.1 (GeV/c)(2). The scattered electron and the kinematically focused recoil proton were detected in coincidence using the 3-magnetic spectrometer setup at the Mainz Microtron MAMI. The transverse and longitudinal as well as the longitudinal-transverse and the transverse-transverse interference structure functions have been determined. From the data the s-wave multipoles E0+ and L0+ have been extracted. The experimental results are compared to recent calculations in chiral perturbation theory.

引用

页码：2294 / 2297

页数：4

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