Measurement of the helicity dependence for the γp→nπ+ channel in the second resonance region

被引：30

作者：

Ahrens, J. ^{[1
]}

Altieri, S.

Annand, J. R. M.

Arends, H. -J.

Beck, R.

Bradtke, C.

Braghieri, A.

d'Hose, N.

Dutz, H.

Goertz, S.

Grabmayr, P.

Hasegawa, S.

Heid, E.

Holvoet, H.

Van Hoorebeke, L.

Horikawa, N.

Iwata, T.

Jahn, O.

Jennewein, P.

Kamalov, S.

Klein, F.

Kondratiev, R.

Lang, M.

Lannoy, B.

Lisin, V.

Martinez-Fabregate, M.

McGeorge, J. C.

Meyer, W.

Panzeri, A.

Pedroni, P.

Pinelli, T.

Preobrajenski, I.

Reicherz, G.

Rohlof, Ch.

Rosner, G.

Rost, M.

Rostomyan, T.

Ryckbosch, D.

Schumacher, M.

Seitz, B.

Tamas, G.

Thomas, A.

Tiator, L.

de Vyver, R. van

Zapadtka, F.

机构：

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

[2] Univ Gottingen, Inst Phys 2, D-37077 Gottingen, Germany

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

[4] CEA Saclay, DSM, DAPNIA SPhN, F-91191 Gif Sur Yvette, France

[5] Univ Ghent, B-9000 Ghent, Belgium

[6] Univ Bonn, Inst Phys, D-53115 Bonn, Germany

[7] Ruhr Univ Bochum, Inst Expt Phys, D-44801 Bochum, Germany

[8] Acad Sci, INR, Moscow, Russia

[9] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 464, Japan

[10] Nagoya Univ, CIRSE, Chikusa Ku, Nagoya, Aichi 464, Japan

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

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

[13] Univ Tubingen, Inst Phys, D-72076 Tubingen, Germany

[14] JINR Dubna, Theoret Phys Lab, Moscow, Russia

来源：

PHYSICAL REVIEW C | 2006年 / 74卷 / 04期

关键词：

D O I：

10.1103/PhysRevC.74.045204

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：

The helicity dependence of the gamma p -> n pi(+) reaction has been measured for the first time in the photon energy range from 450 to 790 MeV. The experiment, performed at the Mainz Microtron (MAMI), used a 4 pi-detector system, a circularly polarized, tagged photon beam, and a longitudinally polarized frozen-spin target. Although these polarized data are mainly sensitive to mechanisms involving the D-13(1520) resonance, a cusp structure at the eta production threshold can be clearly observed. These data are significantly different from the predictions of the existing multipole analyses and are used to determine the helicity amplitudes of the D-13(1520) and S-11(1535) resonances with improved accuracy.

引用

页数：10

共 39 条

[21] A new frozen-spin target for 4π particle detection [J].

Bradtke, C ;

Dutz, H ;

Peschel, H ;

Goertz, S ;

Harmsen, J ;

Hasegawa, S ;

Horikawa, N ;

Iwata, T ;

Kageya, T ;

Matsuda, T ;

Meier, A ;

Meyer, W ;

Radtke, E ;

Reicherz, G ;

Rohlof, C ;

Thomas, A ;

Wakai, A .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 436 (03) :430-442

[22] A RANGE TELESCOPE TECHNIQUE FOR PARTICLE DISCRIMINATION AND ENERGY RECONSTRUCTION [J].

BRAGHIERI, A ;

PEDRONI, P ;

PINELLI, T ;

AUDIT, G ;

DHOSE, N ;

ISBERT, V ;

KERHOAS, S ;

MACCORMICK, M ;

MURPHY, LY ;

TAMAS, G ;

CRAWFORD, R .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1994, 343 (2-3) :623-628

[23] PHOTOPRODUCTION OF POSITIVE PIONS FROM HYDROGEN WITH PHOENICS AT ELSA [J].

BUCHLER, K ;

ALTHOFF, KH ;

ANTON, G ;

ARENDS, J ;

BEULERTZ, W ;

BREUER, M ;

DETEMPLE, P ;

DUTZ, H ;

KOHLGARTH, E ;

KRAMER, D ;

MEYER, W ;

NOLDEKE, G ;

SCHNEIDER, W ;

THIEL, W ;

ZUCHT, B .

NUCLEAR PHYSICS A, 1994, 570 (3-4) :580-598

[24] Photoproduction of positive pions from hydrogen at large angles in the energy range 0.3-2.0 GeV [J].

Dannhausen, HW ;

Durwen, EJ ;

Fischer, HM ;

Leneke, M ;

Niehaus, W ;

Takasaki, F .

EUROPEAN PHYSICAL JOURNAL A, 2001, 11 (04) :441-455

[25] A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV [J].

Drechsel, D ;

Hanstein, O ;

Kamalov, SS ;

Tiator, L .

NUCLEAR PHYSICS A, 1999, 645 (01) :145-174

[26] Gerasimov-Drell-Hearn sum rule and related integrals [J].

Drechsel, D ;

Kamalov, SS ;

Tiator, L .

PHYSICAL REVIEW D, 2001, 63 (11)

[27] THE DRELL-HEARN-GERASIMOV SUM-RULE [J].

DRECHSEL, D .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 34: ELECTROMAGNETIC PROBES AND THE STRUCTURE OF HADRONS AND NUCLEI, 1995, 34 :181-200

[28] PI+ PHOTOPRODUCTION FROM HYDROGEN AT LABORATORY FROM 589 TO 1269 MEV [J].

ECKLUND, SD ;

WALKER, RL .

PHYSICAL REVIEW, 1967, 159 (05) :1195-&

[29] Review of particle physics [J].

Eidelman, S ;

Hayes, KG ;

Olive, KA ;

Aguilar-Benitez, M ;

Amsler, C ;

Asner, D ;

Babu, KS ;

Barnett, RM ;

Beringer, J ;

Burchat, PR ;

Carone, CD ;

Caso, C ;

Conforto, G ;

Dahl, O ;

D'Ambrosio, G ;

Doser, M ;

Feng, JL ;

Gherghetta, T ;

Gibbons, L ;

Goodman, M ;

Grab, C ;

Groom, DE ;

Gurtu, A ;

Hagiwara, K ;

Hernández-Rey, JJ ;

Hikasa, K ;

Honscheid, K ;

Jawahery, H ;

Kolda, C ;

Kwon, Y ;

Mangano, ML ;

Manohar, AV ;

March-Russell, J ;

Masoni, A ;

Miquel, R ;

Mönig, K ;

Murayama, H ;

Nakamura, K ;

Navas, S ;

Pape, L ;

Patrignani, C ;

Piepke, A ;

Raffelt, G ;

Roos, M ;

Tanabashi, M ;

Terning, J ;

Törnqvist, NA ;

Trippe, TG ;

Vogel, P ;

Wohl, CG .

PHYSICS LETTERS B, 2004, 592 (1-4) :1-1109

[30] PHOTOPRODUCTION OF CHARGED PI MESONS FROM PROTONS AND NEUTRONS IN ENERGY-RANGE BETWEEN 250 AND 790 MEV [J].

FUJII, T ;

KONDO, T ;

TAKASAKI, F ;

YAMADA, S ;

HOMMA, S ;

HUKE, K ;

KATO, S ;

OKUNO, H ;

ENDO, I ;

FUJII, H .

NUCLEAR PHYSICS B, 1977, 120 (03) :395-422

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