Evans, M.L.
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Elastic scattering of negative pions by protons at 2 BeV/c

Damouth, David E. ; Jones, L.W. ; Perl, M.L. ;
Tech.Rep.11, 1963.
Inspire Record 1407276 DOI 10.17182/hepdata.163

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Pion-Proton Elastic Scattering from 3 GeV/c to 5 GeV/c

Perl, M.L. ; Jones, Lawrence W. ; Ting, C.C. ;
Phys.Rev. 132 (1963) 1252-1272, 1963.
Inspire Record 46758 DOI 10.17182/hepdata.600

Results of a spark chamber experiment on elastic scattering of pions on protons are presented and analyzed. The processes studied were π+p at 2.92 GeV/c, and π−p at 3.15, 4.13, and 4.95 GeV/c. The data are fitted to an exponential function of the four-momentum transfer, t, in several different ways in attempts to explore systematic energy and angular dependences. No shrinkage of the diffraction peak is seen in comparing the coefficients of a linear exponential fit for |t|<0.4 (GeV/c)2; at larger |t|, however, the cross section falls off with increasing energy. The large-angle differential cross section is examined for structure and is compared with all other large angle scattering data. The results are compared with proton-proton scattering data over the same energy range and substantial differences between the two processes are evident.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Pi-minus + p ---> k-neutral + lambda/sigma-neutral associated production in the forward direction at 6,8,10 and 11.2 gev/c

Bertolucci, E. ; Mannelli, I. ; Pierazzini, G. ; et al.
Lett.Nuovo Cim. 2S1 (1969) 149-155, 1969.
Inspire Record 58290 DOI 10.17182/hepdata.37419

None

2 data tables
Table 1

Only statistical errors are given.

Table 2

Only statistical errors are given.


Cross sections for p p ---> d rho+ from 4.0 to 12.3 gev/c and a search for the delta+

Anderson, H.L. ; Dixit, M. ; Evans, H.J. ; et al.
Phys.Rev.Lett. 26 (1971) 108-112, 1971.
Inspire Record 69063 DOI 10.17182/hepdata.21629

Forward differential cross sections for isospin-1 bosons produced in p+p→d+x+ were measured using a deuteron missing-mass spectrometer at a small angle between 4.0- and 12.3−GeVc incident momentum. Differential cross sections for π+ and ρ+ were extracted from the spectra using phase-space backgrounds. They range from 10.4 to 0.4 μb/sr for π+ and from 1.4 to 0.3 μb/sr for ρ+. A bump near 6 GeVc appears in both dπ and dρ channels. No clear evidence is seen for higher-mass bosons. The possible δ+ cross sections average less than 0.01 μb/sr.

3 data tables
Table 1

TECHNIQUE USED...ELECTRONIC. TABLE 1.

Table 2

TECHNIQUE USED...MISSING MASS. BREIT WIGNER USED WITH FIXED WIDTH (150 MEV) AND VARIABLE MASS (LATTER VARIED WITH MOMENTA FROM 715 TO 765 MEV). 6 PERCENT NORMALIZATION ERROR; 20 PERCENT FROM BREIT WIGNER FIT. TABLE 1.

Table 3

TECHNIQUE USED...MISSING MASS. CROSS-SECTIONS CORRESPOND TO VERY NARROW DELTA (962).


Neutron-proton elastic scattering from 5 to 30 gev/c

Gibbard, B.G. ; Longo, M.J. ; Jones, Lawrence W. ; et al.
Nucl.Phys.B 30 (1971) 77-115, 1971.
Inspire Record 68614 DOI 10.17182/hepdata.33298

The differential cross section for neutron-proton elastic scattering was measured in the diffraction region with incident neutron momenta between 5 and 30 GeV/ c . The experiment was an optical-spark-chamber-counter experiment conducted at the Brookhaven National Laboratory alternating gradient synchrotron. A well collimated neutron beam with a broad energy spectrum was incident on a liquid hydrogen target. The scattered neutrons were detected in a thick-plate spark-chamber array while the recoil protons were detected and momentum analyzed in a magnetic spectrometer with thin-foil spark chambers.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Study of the reactions pi+ p ---> k+ sigma+ and pi+ p ---> k+ y*+(1385) between 3.5 and 14 gev/c

Bashian, A. ; Finocchiaro, G. ; Good, M.L. ; et al.
Phys.Rev.D 4 (1971) 2667-2679, 1971.
Inspire Record 74763 DOI 10.17182/hepdata.23097

Measurements of the differential cross section for the reactions π+p→K+Σ+ and π+p→K+Y*+(1385) are reported at 3.5, 3.75, 4.0, 4.25, 4.5, 4.75, 5.0, 6.0, 10.0, and 14.0 GeV/c. Polarization in π+p→K+Σ+ is also reported at 6.0, 10.0, and 14.0 GeV/c. At small |t|, the cross section for π+p→K+Σ+ is well described by an exponential Aebt with slopes in the range b≈8−10 (GeV/c)−2; for |t|>0.5 (GeV/c)2 this slope decreases considerably. The cross section for π+p→K+Y*+(1385) is well described for |t|>0.2 (GeV/c)2 by a single exponential of slope about half that for π+p→K+Σ+; there is no break near |t|>0.5 (GeV/c)2. We observe a dip in this cross section near t=0. The polarization in π+p→K+Σ+ is consistent with zero for |t|<0.4 (GeV/c)2 and becomes large and positive for larger |t|.

22 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Search for peripheral k+ production in pi- p interactions from 2.75 to 10 gev/c

Bashian, A. ; Finocchiaro, G. ; Good, M.L. ; et al.
Phys.Rev.D 4 (1971) 2680-2683, 1971.
Inspire Record 74755 DOI 10.17182/hepdata.23181

Upper limits are presented for the differential cross section in the reactions π−p→K+Σ− and π−p→K+Y*−(1385) with small momentum transfer from π− to K+.

2 data tables
Table 1

EXTRAPOLATED TO T=0 ASSUMING SLOPE IS 5 GEV**-2.

Table 2

ISOTROPIC ANGULAR DISTRIBUTION ASSUMED IN GIVEN T-RANGE.


X0 ---> 2gamma from pi- p ---> neutral meson + neutron at 3.8 gev/c

Apel, W.D. ; Auslaender, J. ; Mueller, H. ; et al.
Phys.Lett.B 40 (1972) 680-684, 1972.
Inspire Record 75664 DOI 10.17182/hepdata.28261

We report on a measurement for the branching-ratio X 0 → 2γ X 0 ar all. Our result is X 0 → 2γ X 0 → all = (2.9 ± 0.9)% .

1 data table
Table 1

BY COMPARISON WITH THE KNOWN ETA PRODUCTION CROSS SECTION.


Properties of the b-meson observed in 11 gev/c pi+- p interactions

Afzal, M. ; Evans, D. ; Neat, K.P. ; et al.
Nuovo Cim.A 15 (1973) 61-76, 1973.
Inspire Record 86986 DOI 10.17182/hepdata.37808

Production and decay properties of the B-meson are studied in the reactions π±p→B±p at 11 GeV/c. Values for mass, width, total and differential cross-sections and spin density matrix elements are given. The spin and parity, and the helicity states in the B→πω decay, are analysed.

3 data tables
Table 1

BREIT-WIGNER FIT WITH 30 PCT BACKGROUND SUBTRACTED AND CORRECTED FOR UNSEEN OMEGA DECAYS.

Table 2

FOR <OMEGA PION> EVENTS IN THE B REGION (1.16 TO 1.32 GEV) WITHOUT SUBTRACTING BACKGROUND.

Table 3

ASSUMING B HAS SPIN-PARITY OF 1+.


Two-prong fitted channels at 11.7 gev/c

Evans, D. ; Neat, K. ; Caso, C. ; et al.
Nuovo Cim.A 16 (1973) 299-314, 1973.
Inspire Record 87004 DOI 10.17182/hepdata.37784

A sample of 43000 two-prong events obtained at a momomentum of 11.7 GeV/c is used to determine the cross-sections of the fitted channels, and to study the reaction π+p→π+pπ0. We investigate in particular the quasi-two-body channels π0Δ++ and ρ+p.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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