First Measurement of the Helicity Asymmetry for γp → pπ0 in the Resonance Region

被引：49

作者：

Gottschall, M. ^{[1
]}

Anisovich, A. V. ^{[1
,5
]}

Bantes, B. ^{[2
]}

Bayadilov, D. ^{[1
,5
]}

Beck, R. ^{[1
]}

Bichow, M. ^{[6
]}

Boese, S. ^{[1
]}

Brinkmann, K. -Th. ^{[1
,3
]}

Challand, Th. ^{[4
]}

Crede, V. ^{[7
]}

Dietz, F. ^{[3
]}

Dutz, H. ^{[2
]}

Eberhardt, H. ^{[2
]}

Elsner, D. ^{[2
]}

Ewald, R. ^{[2
]}

Fornet-Ponse, K. ^{[2
]}

Friedrich, St. ^{[3
]}

Frommberger, F. ^{[2
]}

Funke, Ch. ^{[1
]}

Gridnev, A. ^{[5
]}

Gruener, M. ^{[1
]}

Gutz, E. ^{[1
,3
]}

Hammann, Ch. ^{[1
]}

Hannappel, J. ^{[2
]}

Hartmann, J. ^{[1
]}

Hillert, W. ^{[2
]}

Hoffmeister, Ph. ^{[1
]}

Honisch, Ch. ^{[1
]}

Jaegle, I. ^{[4
]}

Kaiser, D. ^{[1
]}

Kalinowsky, H. ^{[1
]}

Kammer, S. ^{[2
]}

Keshelashvili, I. ^{[4
]}

Klein, F. ^{[2
]}

Klempt, E. ^{[1
]}

Koop, K. ^{[1
]}

Krusche, B. ^{[4
]}

Kube, M. ^{[1
]}

Lang, M. ^{[1
]}

Lopatin, I. ^{[5
]}

Maghrbi, Y. ^{[4
]}

Makonyi, K. ^{[3
]}

Metag, V. ^{[3
]}

Meyer, W. ^{[6
]}

Mueller, J. ^{[1
]}

Nanova, M. ^{[3
]}

Nikonov, V. ^{[1
,5
]}

Novotny, R. ^{[3
]}

Piontek, D. ^{[1
]}

Reicherz, G. ^{[6
]}

机构：

[1] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany

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

[3] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[4] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[5] Petersburg Nucl Phys Inst, Gatchina 188300, Russia

[6] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany

[7] Florida State Univ, Dept Phys, Tallahassee, FL 32306 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 01期

关键词：

HEARN SUM-RULE; PHOTOPRODUCTION; SPECTROMETER; DEPENDENCE; PHOTON; TARGET; ELSA;

D O I：

10.1103/PhysRevLett.112.012003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The first measurement of the helicity dependence of the photoproduction cross section of single neutral pions off protons is reported for photon energies from 600 to 2300 MeV, covering nearly the full solid angle. The data are compared to predictions from the SAID, MAID, and BnGa partial wave analyses. Strikingly large differences between data and predictions are observed, which are traced to differences in the helicity amplitudes of well-known and established resonances. Precise values for the helicity amplitudes of several resonances are reported.

引用

页数：5

共 50 条

[41] Measurement of the beam asymmetry Σ in the forward direction for (γ)over-right-arrowp → pπ0
Sparks, N.
Crede, V.
Anisovich, A. V.
Bacelar, J. C. S.
Bantes, R.
Bartholomy, O.
Bayadilov, D.
Beck, R.
Beloglazov, Y. A.
Castelijns, R.
Elsner, D.
Ewald, R.
Frommberger, F.
Funke, Chr.
Gregor, R.
Gridnev, A.
Gutz, E.
Hillert, W.
Hoffmeister, P.
Jaegle, I.
Junkersfeld, J.
Kalinowsky, H.
Kammer, S.
Klein, Frank
Klein, Friedrich
Klempt, E.
Kotulla, M.
Krusche, B.
Loehner, H.
Lopatin, I. V.
Lugert, S.
Menze, D.
Mertens, T.
Messchendorp, J. G.
Metag, V.
Nanova, M.
Nikonov, V. A.
Novinski, D.
Novotny, R.
Ostrick, M.
Pant, L. M.
van Pee, H.
Pfeiffer, M.
Roy, A.
Sarantsev, A. V.
Schadmand, S.
Schmidt, C.
Schmieden, H.
Schoch, B.
Shende, S.
PHYSICAL REVIEW C, 2010, 81 (06):
[42] Helicity signatures in subthreshold p0 production on nuclei
Huber, GM
BARYONS 2002, 2003, : 529 - 532
[43] MEASUREMENT OF POLARIZED TARGET ASYMMETRY ON GAMMA-N-]PI-P AROUND THE 2ND RESONANCE REGION
FUJII, K
HAYASHII, H
IWATA, S
KAJIKAWA, R
MIYAMOTO, A
NAKANISHI, T
OHASHI, Y
OKUMI, S
OZAKI, H
TAUCHI, T
YAMAKI, T
MORI, K
TAKEUCHI, Y
NUCLEAR PHYSICS B, 1981, 187 (01) : 53 - 70
[44] Experimental Setup for Measuring P Asymmetry in the Resonance Region of Elastic Pion–Proton Scattering
Yu. A. Beloglazov
A. I. Kovalev
S. P. Kruglov
D. V. Novinskii
V. A. Shchedrov
V. V. Sumachev
V. Yu. Trautman
E. A. Filimonov
I. G. Alekseev
P. E. Budkovskii
V. V. Zhurkin
V. P. Kanavets
L. I. Koroleva
B. V. Morozov
V. M. Nesterov
V. V. Ryl'tsov
D. N. Svirida
A. D. Sulimov
N. A. Bazhanov
E. I. Bunyatova
Instruments and Experimental Techniques, 2004, 47 : 744 - 750
[45] Inclusive cross section and double helicity asymmetry for π0 production in p+p collisions at √s=200 GeV:: Implications for the polarized gluon distribution in the proton
Adare, A.
Afanasiev, S.
Aidala, C.
Ajitanand, N. N.
Akiba, Y.
Al-Bataineh, H.
Alexander, J.
Aoki, K.
Aphecetche, L.
Armendariz, R.
Aronson, S. H.
Asai, J.
Atomssa, E. T.
Averbeck, R.
Awes, T. C.
Azmoun, B.
Babintsev, V.
Baksay, G.
Baksay, L.
Baldisseri, A.
Barish, K. N.
Barnes, P. D.
Bassalleck, B.
Bathe, S.
Batsouli, S.
Baublis, V.
Bazilevsky, A.
Belikov, S.
Bennett, R.
Berdnikov, Y.
Bickley, A. A.
Boissevain, J. G.
Borel, H.
Boyle, K.
Brooks, M. L.
Buesching, H.
Bumazhnov, V.
Bunce, G.
Butsyk, S.
Campbell, S.
Chang, B. S.
Charvet, J. -L.
Chernichenko, S.
Chiba, J.
Chi, C. Y.
Chiu, M.
Choi, I. J.
Chujo, T.
Chung, P.
Churyn, A.
PHYSICAL REVIEW D, 2007, 76 (05):
[46] First Measurement of the B+ → π+π0π0 Branching Fraction and CP Asymmetry
Lai, Y. -T.
Adachi, I.
Aihara, H.
Al Said, S.
Asner, D. M.
Atmacan, H.
Aulchenko, V.
Aushev, T.
Ayad, R.
Babu, V.
Bahinipati, S.
Behera, P.
Belous, K.
Bennett, J.
Bessner, M.
Bhuyan, B.
Bilka, T.
Bobrov, A.
Borah, J.
Bozek, A.
Bracko, M.
Branchini, P.
Browder, T. E.
Budano, A.
Campajola, M.
Cervenkov, D.
Chang, M. -C.
Chang, P.
Chekelian, V.
Chen, A.
Cheon, B. G.
Chilikin, K.
Cho, H. E.
Cho, K.
Cho, S. -J.
Choi, S. -K.
Choi, Y.
Cinabro, D.
Cunliffe, S.
Czank, T.
Das, S.
De Nardo, G.
De Pietro, G.
Dhamija, R.
Di Capua, F.
Dingfelder, J.
Dolezal, Z.
Dong, T., V
Ferber, T.
Fulsom, B. G.
PHYSICAL REVIEW LETTERS, 2023, 130 (18)
[47] RECOIL PROTON POLARIZATION IN REACTION GAMMA-P -] PI0 P IN THIRD RESONANCE REGION
PRENTICE, MN
RAILTON, R
BROOKES, GR
BUSSEY, PJ
SHAW, JE
RUTHERGLEN, JG
SMITH, KM
COMBLEY, FH
GALBRAITH, W
NUCLEAR PHYSICS B, 1972, B 41 (02) : 353 - +
[48] Measurement of single spin asymmetry in η-meson production in p↑p and (p)over-bar↑p interactions in the beam fragmentation region at 200 GeV/c
Adams, DL
Akchurin, N
Alexeeva, LV
Belikov, NI
Bonner, BE
Bravar, A
Bystricky, J
Corcoran, MD
Cossairt, JD
Cranshaw, J
Derevschikov, AA
En'yo, H
Funahashi, H
Goto, Y
Grachov, OA
Grosnick, DP
Hill, DA
Iijima, T
Imai, K
Itow, Y
Iwatani, K
Kharlov, YV
Krueger, KW
Kuroda, K
Laghai, M
Lehar, F
de Lesquen, A
Lopiano, D
Luehring, GC
Maki, T
Makino, S
Masaike, A
Matulenko, YA
Meschanin, AP
Michalowicz, A
Miller, DH
Miyake, K
Nagamine, T
Nessi-Tedaldi, F
Nessi, M
Nguyen, C
Nogach, LV
Nurushev, SB
Ohashi, Y
Onel, Y
Patalakha, DI
Pauletta, G
Penzo, A
Rappazzo, GF
Read, AL
NUCLEAR PHYSICS B, 1998, 510 (1-2) : 3 - 11
[49] π0 Double Longitudinal Helicity Asymmetry Measurements at PHENIX
Manion, Andrew
19TH INTERNATIONAL SPIN PHYSICS SYMPOSIUM (SPIN2010), PT 1, 2011, 295
[50] FIRST MEASUREMENT OF THE STRANGE QUARK ASYMMETRY AT THE Z(0) PEAK
ABREU, P
ADAM, W
ADYE, T
AGASI, E
AJINENKO, I
ALEKSAN, R
ALEKSEEV, GD
ALLPORT, PP
ALMEHED, S
ALMEIDA, FML
ALVSVAAG, SJ
AMALDI, U
AMATO, S
ANDREAZZA, A
ANDRIEUX, ML
ANTILOGUS, P
APEL, WD
ARNOUD, Y
ASMAN, B
AUGUSTIN, JE
AUGUSTINUS, A
BAILLON, P
BAMBADE, P
BARAO, F
BARATE, R
BARDIN, DY
BARKER, GJ
BARONCELLI, A
BARRING, O
BARRIO, JA
BARTL, W
BATES, MJ
BATTAGLIA, M
BAUBILLIER, M
BAUDOT, J
BECKS, KH
BEGALLI, M
BEILLIERE, P
BELOKOPYTOV, Y
BELTRAN, P
BENVENUTI, AC
BERGGREN, M
BERTRAND, D
BIANCHI, F
BIGI, M
BILENKY, MS
BILLOIR, P
BJARNE, J
BLOCH, D
BLUME, M
ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1995, 67 (01): : 1 - 13

← 1 2 3 4 5 →