Bauer, M.
PI- P --> PI0 N
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The momentum dependence of the differential pion charge exchange cross section from 1.3 to 3.8 GeV/c

Kistiakowsky, V. ; Bastian, P. ; Brabson, B. ; et al.
Conference Paper, 1976.
Inspire Record 1408079 DOI 10.17182/hepdata.70407

None

18 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Forward $\pi^-p$ charge exchange scattering between 0.8 and 1.9 GeV

Borgeaud, P. ; Bruneton, C. ; Ducros, Y. ; et al.
Phys.Lett. 10 (1964) 134-137, 1964.
Inspire Record 1400914 DOI 10.17182/hepdata.31224

None

15 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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A MEASUREMENT OF THE POLARIZATION PARAMETER FOR THE REACTION pi- p ---> pi0 n BETWEEN 1.03-GeV/c AND 1.79-GeV/c

Shannon, S.R. ; Anderson, L. ; Bridgewater, A. ; et al.
Phys.Rev.Lett. 33 (1974) 237, 1974.
Inspire Record 80604 DOI 10.17182/hepdata.21279

The polarization parameter for the reaction π−p→π0n has been measured at five incident been momenta between 1.03 and GeV/c. The results are compared with predictions of recent phase-shift analyses.

5 data tables
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Reaction $\pi^- p \to \pi^0 n$ in the 15-{GeV}/$c$ - 40-{GeV}/$c$ Momentum Range

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K.H. ; Bertolucci, E. ; et al.
Nucl.Phys.B 154 (1979) 189, 1979.
Inspire Record 140776 DOI 10.17182/hepdata.34746

A high statistics measurement of the reaction π − p → π 0 n has been performed at the Serpukhov accelerator for 15, 20, 25, 30 and 40 GeV/ c incident pion momentum using the NICE set-up with its associated 648-channel hodoscope spectrometer for γ-ray detection. More than 3 million charge-exchange events have been recorded in total. It is found that the spin-flip and non-spin-flip amplitudes can be parametrized, for small | t |, as exponentials with the same slopes to within a few percent. Also the behaviour of the differential cross section for small and medium | t | agrees with the prediction of a geometrical s -channel model which describes binary reactions in terms of a complex pole b 0 ( s ). The imaginary part of this universal pole, Im b 0 ( s ), has been determined and found to be growing logarithmically with s .

1 data table
Table 1

No data in this table.


Investigation of pi- p --> pi0 n Reaction at Large Momentum Transfer

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K.H. ; Bertolucci, E. ; et al.
Phys.Lett.B 72 (1977) 132, 1977.
Inspire Record 121448 DOI 10.17182/hepdata.39780

New results on a high statistics measurement of pion-nucleon charge exchange scattering at 40 GeV/ c , extending in momentum transfer up to − t = 1.8 (GeV/ c ) 2 , are reported and compared with an optical impact parameter model, together with previous data for the reaction π − p → ηn at the same energy. The imaginary part of the pole trajectory b 0 ( s ) is determined from the slope of the tangent to the maxima of (−t) 1 2 d σ d t . The linear increase of Im b 0 ( s ) with log s , which has been observed at low energies, continues up to 40 GeV/ c .

2 data tables
Table 2

AT SMALL -T, THE BINNING TENDS TO SMEAR OUT THE FORWARD DIP.


Pionic charge exchange on the proton from 40-MeV to 250-MeV.

Breitschopf, J. ; Bauer, M. ; Clement, H. ; et al.
Phys.Lett.B 639 (2006) 424-428, 2006.
Inspire Record 717060 DOI 10.17182/hepdata.31547

The total cross sections for pionic charge exchange on hydrogen were measured using a transmission technique on thin CH2 and C targets. Data were taken for pi- lab energies from 39 to 247 MeV with total errors of typically 2% over the Delta-resonance and up to 10% at the lowest energies. Deviations from the predictions of the SAID phase shift analysis in the 60 to 80 MeV region are interpreted as evidence for isospin-symmetry breaking in the s-wave amplitudes. The charge dependence of the Delta-resonance properties appears to be smaller than previously reported.

1 data table
Table 1

Measured total charge exchange cross sections. The errors are the combined statistical and ststematic errors including normalisation uncertainties.


Measurement of pi- p ---> pi0 n in the vicinity of the eta threshold

Starostin, A. ; Prakhov, S. ; Nefkens, B.M.K. ; et al.
Phys.Rev.C 72 (2005) 015205, 2005.
Inspire Record 688197 DOI 10.17182/hepdata.25171

We report a new measurement of the differential cross section for π−p→π0n from pπ=649 to 752 MeV/c, which is around the opening of the η channel (685 MeV/c). Our data support the main features of the π−p charge-exchange differential cross sections generated by the SAID πN partial-wave analysis. The opening of the η channel has a clear effect on the shape of the excitation function for dσ(π−p→π0n), which is most noticeable in the backward direction.

9 data tables
Table 1

Differential cross section for incident pion momentum 649, 654 and 657 MeV.

Table 2

Differential cross section for incident pion momentum 661, 666 and 669 MeV.

Table 3

Differential cross section for incident pion momentum 673, 678 and 681 MeV.

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Differential cross section of the pion nucleon charge-exchange reaction pi- p --> pi0 n in the momentum range from 148-MeV/c to 323-MeV/c.

The Crystal Ball collaboration Sadler, M.E. ; Kulbardis, A. ; Abaev, V. ; et al.
Phys.Rev.C 69 (2004) 055206, 2004.
Inspire Record 646714 DOI 10.17182/hepdata.31725

Measured values of the differential cross section for pion-nucleon charge exchange are presented at momenta 148, 174, 188, 212, 238, 271, 298, and 323 MeV/c, a region dominated by the Delta resonance. Complete angular distributions were obtained using the Crystal Ball detector at the Alternating Gradient Synchrotron (AGS) at Brookhaven National Laboratory (BNL). Statistical uncertainties of the differential cross sections are typically 2-6%, exceptions being the results at the lowest momentum and at the most forward measurements of the five lowest momenta. We estimate the systematic uncertainties to be 3-6%.

3 data tables
Table 1

The errors shown are statistical only.

Table 2

The errors shown are statistical only.

Table 3

The total charge-exchange reaction cross section as a function of pion momentum obtained by integrating the differential cross sections. The errors shown are the total and statistical errors.


Integral cross-sections for pi- p interaction in the 3,3 resonance region

Friedman, E. ; Paul, M. ; Schechter, M. ; et al.
Phys.Lett.B 302 (1993) 18-22, 1993.
Inspire Record 362059 DOI 10.17182/hepdata.28945

Total cross sections for the π − p single charge exchange and 20° “partial-total” cross sections have been measured between 126 and 202 MeV pion energy. The former are about 4% below similar results of Bugg et al. and (5–10)% below predictions made with currently accepted phase shifts. The latter agree quite well with calculations.

1 data table
Table 1

No description provided.


Analyzing power for pi- p charge exchange in the backward hemisphere from 301-MeV/c to 625-MeV/c and a test of pi N partial wave analyses

Kim, G.J. ; Arends, J. ; Engelage, J. ; et al.
Phys.Rev.D 41 (1990) 733-743, 1990.
Inspire Record 301242 DOI 10.17182/hepdata.22935

The analyzing power of π−p→π0n has been measured for pπ=301−625 MeV/c with a transversely polarized target, mainly in the backward hemisphere. The final-state neutron and a γ from the π0 were detected in coincidence with two counter arrays. Our results are compared with predictions of recent πN partial-wave analyses by the groups of Karlsruhe-Helsinki, Carnegie-Mellon University-Lawrence Berkeley Laboratory (CMU-LBL), and Virginia Polytechnic Institute (VPI). At the lower incident energies little difference is seen among the three analyses, and there is excellent agreement with our data. At 547 MeV/c and above, our data strongly favor the VPI phases, and disagree with Karlsruhe-Helsinki and CMU-LBL analyses, which are the source of the πN resonance parameters given in the Particle Data Group table.

7 data tables
Table 1

Axis error includes +- 5/5 contribution (Uncertainty in background normalisation).

Table 2

Axis error includes +- 5/5 contribution (Uncertainty in background normalisation).

Table 3

Axis error includes +- 5/5 contribution (Uncertainty in background normalisation).

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MEASUREMENT OF DIFFERENTIAL CROSS-SECTIONS FOR THE PI- P ---> PI0 N CHARGE EXCHANGE SCATTERING FROM 1969-MEV/C TO 2965-MEV/C

Suzuki, Y. ; Adachi, T. ; Daigo, M. ; et al.
Nucl.Phys.B 294 (1987) 961-978, 1987.
Inspire Record 255227 DOI 10.17182/hepdata.33477

Precise measurements of the differential cross sections on the π − p→ π 0 n charge exchange scattering have been performed at six incident beam momenta of 1969, 2172, 2370, 2569, 2767 and 2965 MeV/ c covering a wide angular range of −0.95 < cos θ π ∗ < 0.95, where θ π ∗ is an emission angle of π 0 meson in the c.m.s. The results are compared with predictions of recent partial wave analyses.

2 data tables
Table 1

Total cross sections obtained by fitting the Legendre polynomials to the DCS data.

Table 2

Statistical errors only. Cos(theta) bin width is +- 0.025.


MEASUREMENT OF POLARIZATION PARAMETERS FOR THE PI- P ---> PI0 N CHARGE EXCHANGE SCATTERING FROM 1965-MEV/C TO 4220-MEV/C

Minowa, M. ; Adachi, T. ; Daigo, M. ; et al.
Nucl.Phys.B 294 (1987) 979-1000, 1987.
Inspire Record 255228 DOI 10.17182/hepdata.33402

Polarization parameters for the π − p → π 0 n charge exchange scattering have been measured at eight beam momenta between 1965 and 4220 MeV/ c using two different experimental set-ups. The angular range covered is −0.90 < cos θ π ∗ < 0.95 at the five momenta of 1965, 2168, 2360, 2566 and 2960 MeV/ c , where θ π ∗ is the emission angle of the π 0 meson in the c.m.s.. For three momenta of 2770, 3490 and 4220 MeV/ c , the measurements cover the forward angles of 0.1 < cos θ π ∗ < 1.0 . The results are compared with the predictions of π N partial wave analyses.

4 data tables
Table 1

Polarisation measurements from SETUP1. Errors are statistical only.

Table 2

Polarisation measurements from SETUP2. Errors are statistical only.

Table 3

Legendre polynomial coefficients for fit to differential cross section data.

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SMALL /t/ pi- p CHARGE EXCHANGE SCATTERING AT 40-GeV/c

The Serpukhov-Brussels-Annecy(LAPP) collaboration Binon, F.G. ; Davydov, V.A. ; Donskov, S.V. ; et al.
Z.Phys.C 9 (1981) 109, 1981.
Inspire Record 164809 DOI 10.17182/hepdata.13526

π−p→π0n differential cross-sections have been measured in the region of small 4-momentum transfer at 40 GeV/c incident momentum. The experiment performed at the IHEP 70 GeV accelerator makes use of a hodoscope γ-spectrometer. Thet- dependence of the cross-section points to a dominance of the spin-flip amplitude.

1 data table
Table 1

No description provided.


Study of the Charge Exchange Reactions $\pi^- p \to (\pi^0$, $\eta$, $\eta^\prime$) $n$ at 63-{GeV}

The ACCMOR collaboration Daum, C. ; Hertzberger, L. ; Hoogland, W. ; et al.
Z.Phys.C 8 (1981) 95, 1981.
Inspire Record 156266 DOI 10.17182/hepdata.49658

None

4 data tables
Table 1

INCLUDING SYSTEMATIC ERRORS.

Table 2

STATISTICAL ERRORS ONLY.

Table 3

STATISTICAL ERRORS ONLY.

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CROSS-SECTIONS FOR PI- + P ---> N + (K) PI0 (K = 1 TO 5) AND PI- + P ---> N + ETA0 (ETA0 ---> 2 GAMMA) FOR INCIDENT PION MOMENTA BETWEEN 1.3-GEV/C AND 3.8-GEV/C

Crouch, H.R. ; Hargraves, R. ; Lanou, R.E. ; et al.
Phys.Rev.D 21 (1980) 3023-3058, 1980.
Inspire Record 158169 DOI 10.17182/hepdata.4334

This paper presents the results of a study of the dominant neutral final states from π−p interactions. The data were obtained in an experiment performed at the Brookhaven National Laboratory Alternating Gradient Synchrotron, using a set of steel-plate optical spark chambers surrounding a liquid-hydrogen target. We present differential and total cross sections for the reactions (1) π−p→n+π0 and (2) π−p→n+η0(η0→2γ) and total cross sections for the reactions (3) π−p→n+kπ0 (k=2, 3, 4, and 5) and (4) π−p→all neutrals for eighteen values of beam momentum in the interval 1.3 to 4.0 GeV/c. The angular distributions for (1) and (2) have been analyzed in terms of expansions in Legendre polynomials, the coefficients for which are also given.

41 data tables
Table 1

No description provided.

Table 2

SIG = 4*PI*LEG(L=0).

Table 3

FORWARD DIFFERENTIAL CROSS SECTION CALCULATED FROM LEGENDRE POLYNOMIAL COEFFICIENTS AND ERROR MATRICES.

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Reaction $\pi^- p \to \eta n$ in the 15-{GeV}/$c$ to 40-{GeV}/$c$ Momentum Range

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K.H. ; Bertolucci, E. ; et al.
Nucl.Phys.B 152 (1979) 1, 1979.
Inspire Record 133409 DOI 10.17182/hepdata.41487

A high-statistics measurement of the reaction π − p→ η n; η →2 γ has been performed at the 70 GeV Serpukhov accelerator for 15, 20, 25, 30 and 40 GeV/ c incident pion momentum using the NICE set-up with its associated 648-channel hodoscope spectrometer for γ-ray detection. It is found that the spin-flip and non-spin-flip amplitudes can be parametrized, for small | t |, as exponentials with the same slopes to within a few percent. For | t | ≳ 1 (GeV/ c ) 2 there is a break in the differential cross section. In addition, the A 2 effective trajectory deviates markedly for | t | ≳ 1 GeV/ c ) 2 from the linear behaviour valid for smaller | t |.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization Measurements in $\pi^- p$ Charge Exchange Scattering From 617-{MeV}/$c$ to 2267-{MeV}/$c$

Brown, Robert M. ; Clark, A.G. ; Davies, J.K. ; et al.
Nucl.Phys.B 144 (1978) 287-311, 1978.
Inspire Record 130405 DOI 10.17182/hepdata.8173

Results are presented of polarization parameter measurements for the reaction π − p→ π 0 n at 22 momenta between 617 and 2267 MeV/ c . These results are generally in agreement with those of previous measurements and in qualitative agreement with predictions of phase-shift analyses. Together with the recently published differential cross-section measurements, they provide a comprehensive set of data for this reaction in the resonance region.

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of the reaction pi- p ---> pi0 n between 1.0 and 2.4 gev/c

Nelson, Jerry E. ; Chaffee, R.B. ; Dahl, O.I. ; et al.
Phys.Lett.B 47 (1973) 281-284, 1973.
Inspire Record 95427 DOI 10.17182/hepdata.38182

The differential cross section for the reaction π − p→n π ° has been measured with high statistics at six incident beam momenta between 1.0 and 2.4 GeV/ c . The results are compared with predictions of recent phase shift analyses and forward dispersion relations.

3 data tables
Table 1

No description provided.

Table 2

FROM EXTRAPOLATING THE LEGENDRE POLYNOMIAL FITS.

Table 3

THE LEGENDRE POLYNOMIAL FITS WERE CONSTRAINED IN THE EXTREME BACKWARD DIRECTION BY DATA AT THETA = 180 DEG FROM OTHER EXPERIMENTS.


Measurement of the polarization parameter of the reactions pi- p ---> pi0 n and eta n at 5 and 8 gev/c

Bonamy, P. ; Borgeaud, P. ; Crozon, M. ; et al.
Nucl.Phys.B 52 (1973) 392-402, 1973.
Inspire Record 84261 DOI 10.17182/hepdata.50104

Measurements of the polarization parameter of the reactions π − p → π 0 n and π − p → η n at 4.90 and 7.85 GeV/ c and for a squared four-momentum transfer − t ranging from 0.1 to 2.0 (GeV/ c ) 2 have been achieved by using a butanol polarized proton target and detecting only the two γ's from the neutral meson decay. The background due to events involving bound protons has been separately measured and subtracted out. A large positive polarization has been found for the reaction π − p → π 0 n. It is consistent with other pion-nucleon scattering data connected by isospin conservation. The polarization for the reaction π − p → η n is not significantly different from zero within the large experimental errors.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Pion Charge Exchange Scattering at High-Energies

Barnes, A.V. ; Mellema, D.J. ; Tollestrup, A.V. ; et al.
Phys.Rev.Lett. 37 (1976) 76, 1976.
Inspire Record 108646 DOI 10.17182/hepdata.21046

We report on a study of pion charge-exchange scattering carried out at Fermilab in the energy range 20 to 200 GeV. The results can be described remarkably well by a simple Regge-pole model. The charge-exchange cross sections in the forward direction lead to a prediction for the difference in total cross sections of π−p and π+p which is in satisfactory agreement with direct measurements of this difference in another experiment at Fermilab.

3 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////).

Table 3

Axis error includes +- 0.0/0.0 contribution (?////).


Differential Cross-Section Measurements in $\pi^{-}$p Charge Exchange Scattering from 620 to 2730-MeV/c

Brown, Robert M. ; Clark, A.G. ; Davies, J.K. ; et al.
Nucl.Phys.B 117 (1976) 12-49, 1976.
Inspire Record 110001 DOI 10.17182/hepdata.8341

Results are presented of differential cross-section measurements for the reaction π − p→ π 0 n; π 0 → γγ at 22 incident pion momenta between 618 and 2724 MeV/ c . The results are in good agreement with those of other experiments. They represent the first comprehensive set of high statistics measurements of the π − p charge-exchange differential cross section at closely spaced momenta in the resonance region.

31 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Angular Distribution of Charge Exchange and Inelastic Neutrons in $\pi^- - p$ Interactions at 313 and 371 MeV

Lind, Don L. ; Barish, Barry C. ; Ku, Richard J. ; et al.
Phys.Rev. 138 (1965) B1509-B1517, 1965.
Inspire Record 1186787 DOI 10.17182/hepdata.467

Neutron angular distributions from the charge-exchange (π0n) and inelastic modes (π0π0n,π+π−n) of the π−−p interaction have been investigated at 313 and 371 MeV incident-pion kinetic energy. The data were obtained with an electronic counter system. Elastic and inelastic neutrons were separated in the all-neutral final states by time of flight. At both energies the charge-exchange differential cross section at the forward neutron angles differs from that determined by Caris et al. from measurements of the π0-decay gamma distributions, but generally agrees with the phase-shift-analysis calculations of Roper. The distribution of inelastic neutrons from both modes shows a strong preference for low center-of-mass neutron energies. The distribution of these neutrons does not correspond to that expected from the I=0, π−π interaction (ABC effect) suggested to account for the anomaly in p−d collisions observed by Abashian et al. Finally, all available charge-exchange differential-cross-section data from this and other experiments were combined by at least-squares fit to a Legendre expansion of the form dσdΩ*(cosθπ0*)=Σl=0NalPl(cosθπ0*) with the following results (in mb/sr):

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization measurements in $π^−$p charge exchange scattering from 618 MeV/c to 2267 MeV/c

Brown, Robert M. ; Clark, A.G. ; Davies, J.K. ; et al.
AIP Conf.Proc. 35 (1976) 189-197, 1976.
Inspire Record 117337 DOI 10.17182/hepdata.76257

Results are presented of measurements of the polarisation parameter for the reaction π−p→π°n : π°→γγ at 22 incident momenta in the resonance region. These results are generally in agreement with those of previous measurements and in qualitative agreement with predictions of phase shift analyses.

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurements of the Polarization Parameter p, and the Differential Cross-Section, for pi- p --> pi0 n in the Resonance Region

Brown, Robert M. ; Clark, A.G. ; Davies, J.K. ; et al.
75-89, 1976.
Inspire Record 116148 DOI 10.17182/hepdata.76441

None

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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π−+p→π0+n Charge-Exchange Scattering at High Energies

Mannelli, I. ; Bigi, A. ; Carrara, R. ; et al.
Phys.Rev.Lett. 14 (1965) 408, 1965.
Inspire Record 1474811 DOI 10.17182/hepdata.75497

Phys. Rev. Lett. 14, 408 (1965)

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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A secondary peak at t = −1 (GeV/c)2 in high energy π-p charge exchange scattering

Sonderegger, P. ; Kirz, J. ; Guisan, O. ; et al.
Phys.Lett. 20 (1966) 75-78, 1966.
Inspire Record 1498686 DOI 10.17182/hepdata.75504

None

23 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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A HIGH STATISTICS STUDY OF THE REACTION pi- p ---> pi0 n BETWEEN 1.0-GeV/c AND 2.4-GeV/c

Nelson, J.E. ; Chaffee, R.B. ; Dahl, O.I. ; et al.
LBL-1027, 1972.
Inspire Record 1107529 DOI 10.17182/hepdata.75455

None

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Measurement of Differential Cross-Sections and Polarization Parameters for the $\pi^- p \to \pi^0 n$ Charge Exchange Scattering from 2.0 GeV/c to 4.25 GeV/c (talk, Abstract only)

Miyake, K. ; Nakamura, T. ; Kikuchi, R. ; et al.
599, 1979.
Inspire Record 150810 DOI 10.17182/hepdata.76255

None

11 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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