Polarized Target Asymmetry in pi0 Photoproduction Between 0.4-GeV and 1.0-GeV Around 100-Degrees

Feller, P. ; Fukushima, M. ; Horikawa, N. ; et al.
Phys.Lett.B 55 (1975) 241-244, 1975.
Inspire Record 90929 DOI 10.17182/hepdata.35716

The polarized target asymmetry in the reaction γp→π°p has been measured at c.m. angles around 100° for photon energies between 0.4 and 1.0 GeV by detecting both the recoil proton and the π°. The result is compared with recent analyses.

1 data table match query

No description provided.


Measurement of Polarized Target Asymmetry on $\gamma n \to \pi^- p$ Around the Second Resonance Region

Fujii, K. ; Hayashii, H. ; Iwata, S. ; et al.
Nucl.Phys.B 187 (1981) 53-70, 1981.
Inspire Record 156223 DOI 10.17182/hepdata.34260

The polarized target asymmetry for γ n→ π − p was measured over the second resonance region from 0.55 to 0.9 GeV at pion c.m. angles between 60° and 120°. A double-arm spectrometer was used with a deuterated butanol target to detect both the pion and the proton, thus considerably improving the data quality. Including the new data in the amplitude analysis, the radiative decay widths of three resonances were determined more accurately than before. The results are compared with various quark models.

7 data tables match query

PHOTON ENERGY IS IN THE NEUTRON REST FRAME.

PHOTON ENERGY IS IN THE NEUTRON REST FRAME.

PHOTON ENERGY IS IN THE NEUTRON REST FRAME.

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The Measurement of Polarized Target Asymmetry on gamma p --> pi0 p Below 1-GeV

Fukushima, M. ; Horikawa, N. ; Kajikawa, R. ; et al.
Nucl.Phys.B 136 (1978) 189-200, 1978.
Inspire Record 119548 DOI 10.17182/hepdata.35100

The polarized target asymmetry in the reaction γ p → π 0 p has been measured at c.m. angles of 30°, 80°, 105° and 120° for incident photon energies below 1 GeV. Two decay photons from π 0 were detected in coincidence at 30°, and at the other angles recoil protons and single photons from π 0 were detected. The results are compared with recent phenomenological analyses.

1 data table match query

No description provided.


The Measurement of Polarized Target Asymmetry on gamma p --> pi+ n Below 1.02-GeV

Fukushima, M. ; Horikawa, N. ; Kajikawa, R. ; et al.
Nucl.Phys.B 130 (1977) 486-504, 1977.
Inspire Record 119547 DOI 10.17182/hepdata.35243

The polarized target asymmetry for the process γ p → π + n has been measured for incident photon energies below 1.02 GeV over a range of c.m. angles from 40° to 160°. π + mesons from a polarized butanol target were detected by a magnetic spectrometer. The results are compared with predictions given by existing analyses. A tentative interpretation of the data is performed, and a larger contribution of S-wave resonances is suggested. The photocouplings of dominant resonances were hardly changed by the inclusion of new data and they seem to be almost uniquely determined.

1 data table match query

No description provided.


Polarized Target Asymmetry in $\pi^+$ Photoproduction Between 0.3-GeV and 1.0-GeV at 130°

Feller, P. ; Fukushima, M. ; Horikawa, N. ; et al.
Nucl.Phys.B 102 (1976) 207, 1976.
Inspire Record 90055 DOI 10.17182/hepdata.36079

The polarized target asymmetry for γ + p → π + + n was measured at c.m. angles around 130° for the energy range between 0.3 and 1.0 GeV. A magnetic spectrometer system was used to detect π + mesons from the polarized butanol target. The data show two prominent positive peaks at 0.4 and 0.8 GeV and a deep minimum at 0.6 GeV. These features are well reproduced by the phenomenological analysis made by us.

1 data table match query

No description provided.


Measurement of the asymmetry for pi+ photoproduction from polarized protons between 300 and 900 mev

Arai, S. ; Fukui, S. ; Horikawa, N. ; et al.
Nucl.Phys.B 48 (1972) 397-414, 1972.
Inspire Record 84444 DOI 10.17182/hepdata.32778

The asymmetry of the cross section for π + photoproduction from a polarized butanol target has been measured at a c.m. angle 90° and photon energies between 300 and 900 MeV by a single-arm spectrometer detecting positive pions. Our results indicate that the asymmetry has clear positive peaks at photon energies 400 and 700 MeV with a deep valley at about 600 MeV. The general feature of the results is well reproduced by the phenomenological analyses made by Walker and ourselves; however, the best fit to the polarized target asymmetry data seems to give a somewhat different set of parameters from that given by Walker.

1 data table match query

No description provided.


Polarization of recoil protons from neutral pion photoproduction

Hayakawa, Satio ; Horikawa, Naoaki ; Kajikawa, Ryoichi ; et al.
J.Phys.Soc.Jap. 25 (1968) 307-318, 1968.
Inspire Record 1393542 DOI 10.17182/hepdata.38539
1 data table match query

No description provided.


Angular dependence of the recoil proton polarization from the reaction $\gamma p \to \pi^0 p$ for photon energies between 360-MeV and 1200-MeV

Blum, P. ; Brinckmann, P. ; Brockmann, R. ; et al.
BONN-PI-1-105, 1970.
Inspire Record 1085812 DOI 10.17182/hepdata.70500

None

1 data table match query

No description provided.


Measurement of the anti-Lambda polarization in muon-neutrino charged current interactions in the NOMAD experiment

The NOMAD collaboration Astier, P. ; Autiero, D. ; Baldisseri, A. ; et al.
Nucl.Phys.B 605 (2001) 3-14, 2001.
Inspire Record 554759 DOI 10.17182/hepdata.48928

We present a measurement of the polarization of Antilambda hyperons produced in nu_mu charged current interactions. The full data sample from the NOMAD experiment has been analyzed using the same V0 identification procedure and analysis method reported in a previous paper for the case of Lambda hyperons. The Antilambda polarization has been measured for the first time in a neutrino experiment. The polarization vector is found to be compatible with zero.

1 data table match query

Lambdabar polarization in regions of the Bjorken scaling variable X.


High-statistics measurement of neutral pion-pair production in two-photon collisions

The Belle collaboration Uehara, S. ; Watanabe, Y. ; Adachi, I. ; et al.
Phys.Rev.D 78 (2008) 052004, 2008.
Inspire Record 786406 DOI 10.17182/hepdata.50151

We report a high-statistics measurement of differential cross sections for the process gamma gamma -> pi^0 pi^0 in the kinematic range 0.6 GeV <= W <= 4.0 GeV and |cos theta*| <= 0.8, where W and theta* are the energy and pion scattering angle, respectively, in the gamma gamma center-of-mass system. Differential cross sections are fitted to obtain information on S, D_0, D_2, G_0 and G_2 waves. The G waves are important above W ~= 1.6 GeV. For W <= 1.6 GeV the D_2 wave is dominated by the f_2(1270) resonance while the S wave requires at least one additional resonance besides the f_0(980), which may be the f_0(1370) or f_0(1500). The differential cross sections are fitted with a simple parameterization to determine the parameters (the mass, total width and Gamma_{gamma gamma}B(f_0 -> pi^0 pi^0)) of this scalar meson as well as the f_0(980). The helicity 0 fraction of the f_2(1270) meson, taking into account interference for the first time, is also obtained.

4 data tables match query

Differential cross section for W = 1.27, 1.29 and 1.31 GeV.

Differential cross section for W = 1.33, 1.35 and 1.37 GeV.

Differential cross section for W = 1.39, 1.41 and 1.43 GeV.

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