Agnello, Michelangelo
PBAR P --> NBAR N
[2.0, 5.0]
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Charge exchange anti-p p ---> anti-n n differential cross-sections between 546-MeV/c and 1287-MeV/c

Ahmidouch, A. ; Heer, E. ; Hess, R. ; et al.
Phys.Lett.B 364 (1995) 116-120, 1995.
Inspire Record 407478 DOI 10.17182/hepdata.28461

The differential cross section of the charge-exchange reaction p p → n n has been measured at the CERN Low Energy Antiproton Ring (LEAR) at seven p momenta in the range 546–1287 MeV/ c . A pentanol polarized target has been used and the neutron and the antineutron have been detected in coincidence. The data cover most of the angular range.

7 data tables
Table 1

No description provided.

Table 2

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Table 3

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High precision measurement of the $\overline{p}p \to \overline{n}n$ charge exchange differential cross-section

Birsa, R. ; Bradamante, F. ; Bressan, A. ; et al.
Phys.Lett.B 339 (1994) 325-331, 1997.
Inspire Record 382031 DOI 10.17182/hepdata.27114

The differential p p → n n charge-exchange cross section has been measured at the CERN Low Energy Antiproton Ring (LEAR), at two incident p momenta, 601 and 1202 MeV/c. features of the differential cross-section near the forward direction, i.e. a sharp peak at 0° scattering angle followed by an energy dependent dip-bump structure, are confirmed and measured with good precision and high statistical accuracy. The data show very clearly that the shape of the cross-section is a manifestation of the pion-exchange amplitude, and a simple extrapolation to the pion pole already indicates that the pion-nucleon coupling constant f c 2 can be determined with good precision.

2 data tables
Table 1

No description provided.

Table 2

Corrected with data from PL B405,389.


Measurement of the analyzing power of the charge exchange anti-p p ---> anti-n n reaction in the momentum range 546-MeV/c - 1287-MeV/c at LEAR

Birsa, R. ; Bradamante, F. ; Bressan, A. ; et al.
Nucl.Phys.B 403 (1993) 25-64, 1993.
Inspire Record 354500 DOI 10.17182/hepdata.37129

Final results of the measurement of the analysing power A On of the p p → n n reaction are presented. Eight measurements in the range 546–1287 MeV/ c incoming p momentum have been performed over the full angular range using a solid polarized proton target and the Low Energy Antiproton Ring (LEAR) at CERN antiproton extracted beams.

4 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.

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First measurement of the depolarization parameter D(onon) of the anti-p p ---> anti-n n charge exchange reaction

Birsa, R. ; Bradamante, F. ; Bressan, A. ; et al.
Phys.Lett.B 302 (1993) 517-522, 1993.
Inspire Record 354498 DOI 10.17182/hepdata.28944

The depolarization parameter D 0 n 0 n in the charge-exchange reaction p p ↑→ n n ↑ has been measured for the first time at the CERN Low Energy Antiproton Ring (LEAR) at 875 MeV/ c antiproton beam momentum, in the forward hemisphere. The measured values of D 0 n 0 n are always smaller than ±0.3, indicating that the two-spin amplitudes dominate the scattering matrix as suggested by the meson exchange potential models.

1 data table
Table 1

No description provided.


Measurement of the analyzing power of the charge exchange anti-p p ---> anti-n n reaction in the momentum range 546-MeV/c - 875-MeV/c at LEAR

Birsa, R. ; Bradamante, F. ; Bressan, A. ; et al.
Phys.Lett.B 273 (1991) 533-539, 1991.
Inspire Record 322502 DOI 10.17182/hepdata.29287

Results are given for the analysing power of the p ̄ p→ n ̄ n charge-exchange reaction at four incident beam momenta. The measurement is part of an experimental programme to study the spin structure of this reaction at LEAR. The analyzing power shows strong angular and energy dependence, which at present is not reproduced by the existing meson-exchange potential models.

4 data tables
Table 1

No description provided.

Table 2

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Table 3

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