Determination of the E2/M1 ratio in the yN→Δ(1232) transition from a simultaneous measurement of p((γ)over-right-arrow,p)π0 and p((γ)over-right-arrow, π+)n -: art. no. 035204

被引：163

作者：

Beck, R ^{[1
]}

Krahn, HP

Ahrens, J

Annand, JRM

Arends, HJ

Audit, G

Braghieri, A

d'Hose, N

Drechsel, D

Hanstein, O

McGeorge, JC

Owens, RO

Pedroni, P

Pinelli, T

Tamas, G

Tiator, L

Walcher, T

机构：

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

[2] CEA Saclay, DAPNIA, Serv Phys Nucl, F-91191 Gif Sur Yvette, France

[3] Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy

[4] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy

[5] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

来源：

PHYSICAL REVIEW C | 2000年 / 61卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.61.035204

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：

Tagged linearly polarized photons have been used at the Mainz Microtron (MAMI) for simultaneous measurements of the p(<(gamma)over right arrow>,p)pi(0). and p(<(gamma)over right arrow>,pi(+))n reaction channels to study the gamma N-->Delta(1232) transition. The energy dependence of the magnetic dipole M-1+(3/2) and electric quadrupole E-1+(3/2) amplitudes have been extracted from these data in the photon energy range from 270 to 420 MeV. The E2/M1 ratio for the gamma N-->Delta(1232) transition has been determined to be -(2.5+/-0.1(stat)+/-0.2(sys))% at the resonance position (delta(33)=90 degrees).

引用

页码：352041 / 3520414

页数：14

共 62 条

[1]

[Anonymous], COMMUNICATION

[2] DESIGN OF A TAGGED PHOTON SPECTROMETER FOR USE WITH THE MAINZ 840MEV MICROTRON [J].

ANTHONY, I ;

KELLIE, JD ;

HALL, SJ ;

MILLER, GJ ;

AHRENS, J .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1991, 301 (02) :230-240

[3] Updated resonance photodecay amplitudes to 2 GeV [J].

Arndt, RA ;

Strakovsky, II ;

Workman, RL .

PHYSICAL REVIEW C, 1996, 53 (01) :430-440

[4] DAPHNE - A LARGE-ACCEPTANCE TRACKING DETECTOR FOR THE STUDY OF PHOTOREACTIONS AT INTERMEDIATE ENERGIES [J].

AUDIT, G ;

BLOCH, A ;

DHOSE, N ;

ISBERT, V ;

MARTIN, J ;

POWERS, R ;

SUNDERMANN, D ;

TAMAS, G ;

WALLACE, PA ;

ALTIERI, S ;

BRAGHIERI, A ;

FOSSATI, F ;

PEDRONI, P ;

PINELLI, T ;

BECHADE, J ;

CARTON, PH ;

CONAT, S ;

FOUCAUD, D ;

GOLDSTICKER, M .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1991, 301 (03) :473-481

[5] REACTION PI-P-]GAMMA-N BELOW THE DELTA-RESONANCE [J].

BAGHERI, A ;

ANIOL, KA ;

ENTEZAMI, F ;

HASINOFF, MD ;

MEASDAY, DF ;

POUTISSOU, JM ;

SALOMON, M ;

ROBERTSON, BC .

PHYSICAL REVIEW C, 1988, 38 (02) :875-884

[6] COMPLETE EXPERIMENTS IN PSEUDOSCALAR PHOTOPRODUCTION [J].

BARKER, IS ;

DONNACHIE, A ;

STORROW, JK .

NUCLEAR PHYSICS B, 1975, 95 (02) :347-356

[7] VANISHING OF E2 PART OF N33-]N+GAMMA AMPLITUDE IN NON-RELATIVISTIC QUARK MODEL OF ELEMENTARY PARTICLES [J].

BECCHI, C ;

MORPURGO, G .

PHYSICS LETTERS, 1965, 17 (03) :352-&

[8] 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

[9] E2/M1 ratio from the mainz p((gamma)over-right-arrow,p)pi(0) data - Reply [J].

Beck, R ;

Krahn, HP .

PHYSICAL REVIEW LETTERS, 1997, 79 (22) :4512-4512

[10] EXPERIMENTAL STUDIES OF THE SIGMA, T, P POLARIZATION PARAMETERS AND THE GAMMA-P-]P-PI-O REACTION MULTIPOLE ANALYSIS IN THE 1ST RESONANCE REGION [J].

BELYAEV, AA ;

GETMAN, VA ;

GORBENKO, VG ;

GUSHCHIN, VA ;

DERKACH, AY ;

ZHEBROVSKY, YV ;

KARNAUKHOV, IM ;

KOLESNIKOV, LY ;

LUKHANIN, AA ;

OMELAYENKO, AS ;

RUBASHKIN, AL ;

SOROKIN, PV ;

SPOROV, EA ;

TELEGIN, YN .

NUCLEAR PHYSICS B, 1983, 213 (02) :201-222

← 1 2 3 4 5 6 7 →