6533b839fe1ef96bd12a6da2

RESEARCH PRODUCT

TandFasymmetries inπ0photoproduction on the proton

A. NikolaevI. J. D. MacgregorG. ReicherzP. OttD. HornidgeJ. R. M. AnnandB. OussenaS. CherepnyaD. I. GlazierD. I. GlazierReinhard BeckP. PedroniA. B. LazarevV. L. KashevarovI. I. StrakovskyE. F. McnicollM. DieterleT. RostomyanD. M. ManleyS. GarniM. KorolijaL. V. Fil'kovL. TiatorD. G. MiddletonD. HowdleC. CollicottK. LivingstonI. KeshelashviliD. P. WattsW. GradlM. OberleN. S. BorisovA. BraghieriTh. StrubM. WolfesA. J. SartyI. SupekH. J. ArendsS. N. PrakhovS. SchumannM. OstrickDavid HamiltonP. B. OtteA. FixAndy ThomasR. A. MiskimenV. LisinW. MeyerB. KruscheH. OrtegaA. B. NeganovG. M. HuberYu. A. UsovO. SteffenP. Hall BarrientosW. J. BriscoeA. N. MushkarenkovM. UnverzagtE. J. DownieR. KondratievG. M. GurevichV. V. PolyanskiA. PolonskiLilian WitthauerD. WerthmüllerP. P. MartelJ. MancelS. Costanza

subject

PhysicsParticle physicsPhoton010308 nuclear & particles physicsmedia_common.quotation_subjectBremsstrahlungPhoton energy01 natural sciencesAsymmetryResonance (particle physics)BaryonNuclear physics0103 physical sciencesPhysics::Accelerator PhysicsNuclear Experiment010306 general physicsMicrotronCrystal Ballmedia_common

description

The γp→π0p reaction was studied at laboratory photon energies from 425 to 1445 MeV with a transversely polarized target and a longitudinally polarized beam. The beam-target asymmetry F was measured for the first time and new high precision data for the target asymmetry T were obtained. The experiment was performed at the photon tagging facility of the Mainz Microtron (MAMI) using the Crystal Ball and TAPS photon spectrometers. The polarized cross sections were expanded in terms of associated Legendre functions and compared to recent predictions from several partial-wave analyses. The impact of the new data on our understanding of the underlying partial-wave amplitudes and baryon resonance contributions is discussed.

yearjournalcountryeditionlanguage
2016-05-31Physical Review C
https://doi.org/10.1103/physrevc.93.055209