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Compton scattering by the proton through Theta(CMS) = 75-degrees and 90-degrees in the Delta resonance region

Hünger, A ; Peise, J ; Robbiano, A ; et al.
Nucl.Phys.A 620 (1997) 385-416, 1997.
Inspire Record 458618 DOI 10.17182/hepdata.36349

Differential cross sections for Compton scattering by the proton have been measured in the energy interval between 200 and 500 MeV at scattering angles of θ cms = 75° and θ cms = 90° using the CATS, the CATS/TRAJAN, and the COPP setups with the Glasgow Tagger at MAMI (Mainz). The data are compared with predictions from dispersion theory using photo-meson amplitudes from the recent VPI solution SM95. The experiment and the theoretical procedure are described in detail. It is found that the experiment and predictions are in agreement as far as the energy dependence of the differential cross sections in the Δ-range is concerned. However, there is evidence that a scaling down of the resonance part of the M 1+ 3 2 photo-meson amplitude by (2.8 ± 0.9)% is required in comparison with the VPI analysis. The deduced value of the M 1+ 3 2 - photoproduction amplitude at the resonance energy of 320 MeV is: |M 1+ 3 2 | = (39.6 ± 0.4) × 10 −3 m π + −1 .

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Threshold measurements at the internal experimental facility COSY-11

Balewski, J. ; Brauksiepe, S. ; Budzanowski, A. ; et al.
Nucl.Phys.A 626 (1997) 85C-92C, 1997.
Inspire Record 463151 DOI 10.17182/hepdata.36361

The experimental setup and detection technique of the COSY-11 installation, an internal experimental facility at the cooler synchrotron and storage ring COSY Jülich, are described. The detection system has been designed for meson production studies with full geometrical acceptance close to threshold. Preliminary results of first measurements are presented, emphasis is put on strangeness production in the reactions pp → ppK + K − and pp → pK + Λ .

2 data tables
Table 1

Excess energy of 6.1 MeV above threshold 3.3016 GeV.

Table 2

Excess energy of 2 MeV above threshold 2.339 GeV.


Neutron-proton differential cross-section measurements for En from 28 to 75 MeV

Benck, S. ; Slypen, I. ; Meulders, J-P. ; et al.
Nucl.Phys.A 615 (1997) 220-228, 1997.
Inspire Record 459311 DOI 10.17182/hepdata.36360

Experimental measurements of differential cross-sections for neutron-proton scattering are reported for 12 incident neutron energies between 28 and 75 MeV. Data are compared with predictions of different theoretical models and with other experimental results.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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First results from COSY

Grzonka, D. ; Kilian, K. ;
Nucl.Phys.A 626 (1997) 41C-54C, 1997.
Inspire Record 463146 DOI 10.17182/hepdata.36466

None

1 data table
Table 1

Preliminary data.


Correlation between longitudinal and transversal momenta in pion nucleon and pion nucleus interactions with strange particle production. (In Russian)

Bylekov, O.V. ; Endalov, A.L. ; Kiselevich, I.L. ; et al.
ITEP-25-97, 1997.
Inspire Record 448028 DOI 10.17182/hepdata.39970

None

1 data table
Table 1

No description provided.


Measurement of the probability of the decay K+ ---> pi0 pi0 e+ neutrino

Barmin, V.V. ; Barylov, V.G. ; Davidenko, G.V. ; et al.
Sov.J.Nucl.Phys. 48 (1988) 1032-1034, 1988.
Inspire Record 457321 DOI 10.17182/hepdata.40034

None

1 data table
Table 1

No description provided.


Analyzing power of collisions between polarized protons with energies in the range 0.71-GeV to 3.61-GeV and carbon nuclei

Anoshina, E.V. ; Bodyagin, V.A. ; Vardanian, I.N. ; et al.
Phys.Atom.Nucl. 60 (1997) 224-229, 1997.
Inspire Record 457394 DOI 10.17182/hepdata.17091

None

3 data tables
Table 1

(C=EXP1) and (C=EXP2) correspond to two different method of event's registration. See text for details.

Table 2

(C=EXP1) and (C=EXP2) correspond to two different method of event's registration. See text for details. Quasielastic events.

Table 3

(C=EXP1) and (C=EXP2) correspond to two different method of event's registration. See text for details. Quasielastic events.


Investigation of the dynamics of hadron nucleus interactions at 40-GeV by using the features of neutral strange particles.

Akhobadze, K.G. ; Chikovani, L.D. ; Ioramashvili, E.Sh. ; et al.
Phys.Atom.Nucl. 61 (1998) 196-202, 1998.
Inspire Record 442181 DOI 10.17182/hepdata.17088

None

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of the quasifree p + n --> d + eta reaction near threshold.

Calen, H. ; Dyring, J. ; Fransson, K. ; et al.
Phys.Rev.Lett. 79 (1997) 2642-2645, 1997.
Inspire Record 450604 DOI 10.17182/hepdata.19551

The quasifree p+n→d+η reaction cross section has been measured in the near-threshold region using deuterium from an internal cluster-jet target and 1350 MeV protons in the CELSIUS storage ring of the The Svedberg Laboratory, Uppsala. The energy dependence of the cross section is extracted by exploiting the Fermi momentum of the target neutron and reconstructing the kinematics on an event-by-event basis. The data cover center of mass excess energies from 16 to 113 MeV.

1 data table
Table 1

No description provided.


Evidence for narrow baryons in inelastic p p scattering.

Tatischeff, B. ; Willis, N. ; Comets, M.P. ; et al.
Phys.Rev.Lett. 79 (1997) 601-604, 1997.
Inspire Record 450173 DOI 10.17182/hepdata.19550

The reaction pp→pπ+N has been studied at three energies ( Tp=1520, 1805, and 2100 MeV) and six angles from 0° up to 17° (laboratory). Several narrow states have been observed in missing mass spectra at 1004, 1044, and 1094 MeV. Their widths are typically 1 order of magnitude smaller than the widths of N* or Δ. Possible biases are discussed. These masses are in good agreement with those calculated within a simple phenomenological mass formula based on color magnetic interaction between two colored quark clusters.

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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