Neutral Meson Photoproduction from Complex Nuclei

1962 ◽  
Vol 127 (5) ◽  
pp. 1772-1783 ◽  
Author(s):  
R. A. Schrack ◽  
J. E. Leiss ◽  
S. Penner
Keyword(s):  
Neutral Meson ◽  
Meson Photoproduction ◽  
Complex Nuclei

scholarly journals Non-strange dibaryons studied in coherent double neutral-meson photoproduction on the deuteron

2020 ◽  
Vol 241 ◽  
pp. 01007
Author(s):  
Takatsugu Ishikawa ◽  
Hisako Fujimura ◽  
Hiroshi Fukasawa ◽  
Ryo Hashimoto ◽  
Qinghua He ◽  
...  
Keyword(s):  
Invariant Mass Distribution ◽  
Center Of Mass ◽  
Resonance State ◽  
Angular Distributions ◽  
Neutral Meson ◽  
Mass Energy ◽  
Meson Photoproduction ◽  
Neutral Pions ◽  
Center Of Mass Energy ◽  
Interesting Object

The B = 2 bound/resonance state (dibaryon) is an interesting object, which can be a molecule consisting of two baryons or a spatially compact hexaquark hadron object. The yd ^ n°n°d reaction has been experimentally investigated at incident energies ranging from 0.58 to 1.15 GeV to study non-strange dibaryons. The angular distributions of deuteron emission in the yd center-of-mass energy cannot be reproduced by quasi-free production of two neutral pions followed by deuteron coalescence. Additionally a 2.14-GeV peak is observed in the n°d invariant mass distribution. These suggest a sequential process such as yd ^ RIS ^ n°RIV ^ n°n°d with an isoscalar dibaryon RIS and an isovector dibaryon RIV. Since the mass of the observed isoscalar dibaryons are close to the sum of the nucleon (N) and nucleon resonance (N*) masses, an S-wave NN* molecule may play a role as a doorway to a dibaryon.

scholarly journals Non-strange Dibaryons Studied in Coherent Double Neutral-meson Photoproduction on the Deuteron

2020 ◽  
Vol 51 (1) ◽  
pp. 329 ◽  
Author(s):  
T. Ishikawa ◽  
H. Fujimura ◽  
H. Fukasawa ◽  
R. Hashimoto ◽  
Q. He ◽  
...  
Keyword(s):  
Neutral Meson ◽  
Meson Photoproduction

K+Meson Photoproduction from Complex Nuclei

1964 ◽  
Vol 133 (5B) ◽  
pp. B1200-B1201 ◽  
Author(s):  
A. J. Sadoff ◽  
B. D. McDaniel
Keyword(s):  
Meson Photoproduction ◽  
K Meson ◽  
Complex Nuclei

MEASUREMENT OF THE DOUBLE POLARIZATION OBSERVABLE E IN π0 AND η PHOTOPRODUCTION OFF PROTONS WITH THE CBELSA/TAPS EXPERIMENT

2014 ◽  
Vol 26 ◽  
pp. 1460112
Author(s):  
◽  
M. GOTTSCHALL ◽  
J. MÜLLER
Keyword(s):  
Partial Wave ◽  
Electron Accelerator ◽  
Neutral Pion ◽  
State Of The Art ◽  
Polarization Observable ◽  
Photon Beam ◽  
Neutral Meson ◽  
Meson Photoproduction ◽  
Circularly Polarized ◽  
Double Polarization

Double polarization experiments using a longitudinally or transversely polarized frozen-spin-butanol target and a linearly or circularly polarized photon beam were performed with the CBELSA/TAPS experiment at the electron accelerator ELSA. With its nearly 4π angular coverage, this setup is very well suited to study neutral meson photoproduction off the nucleon up to beam energies of 3.2 GeV. Results obtained for the double polarization observable E in neutral pion and eta photoproduction show the large sensitivity of the data on the contributing resonances. If the data are compared to the predictions of state of the art partial wave analyses, large discrepancies are observed.

Neutral-meson photoproduction and related vector-meson production

1972 ◽  
Vol 4 (11) ◽  
pp. 475-482 ◽  
Author(s):  
J. L. Alonso ◽  
L. Gislen ◽  
J. Tran Thanh Van
Keyword(s):  
Vector Meson ◽  
Meson Production ◽  
Neutral Meson ◽  
Meson Photoproduction ◽  
Vector Meson Production
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