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Photoproduction of Single Positive Pions Between 1.2 and 3 GeV

Buschhorn, G. ; Carroll, J. ; Eandi, R.D. ; et al.

Phys.Rev.Lett. 17 (1966) 1027-1030, 1966.

Inspire Record 50803 DOI 10.17182/hepdata.21795

Differential cross sections for the reaction γ+p→n+π+ are presented for incident photon energies between 1.2 and 3 GeV and pion center-of-mass production angles of 15 to 50 deg.

11 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Large-Angle Pion-Proton Elastic Scattering at High Energies

Orear, J. ; Rubinstein, R. ; Scarl, D.B. ; et al.

Phys.Rev. 152 (1966) 1162-1170, 1966.

Inspire Record 50774 DOI 10.17182/hepdata.407

Differential cross sections for elastic π±−p scattering have been measured at lab momenta of 8 and 12 GeV/c in a momentum-transfer region corresponding to 1.2≤−t≤6 (GeV/c)2. Also, differential cross sections near 180° were measured for 4 and 8 GeV/c pions. At momentum transfers greater than −t=2 (GeV/c)2, the π−p cross sections drop much faster with increasing angle than the corresponding p−p cross sections. Also, in the region −t≃1.3 (GeV/c)2, there is structure in the π−p angular distribution but not in the p−p angular distribution. At −t≃3 (GeV/c)2, the drop in cross section appears to stop and from then on the angular distribution is consistent with isotropy. But in the angular region 170° to 180°, the cross sections have become much larger, and sharp backward peaks are observed. Information is given on the energy and charge dependences and widths of these backward peaks.

22 data tables

Table 1

'1'. '2'.

Table 2

'1'. '2'.

Table 3

No description provided.

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Observation of Resonance in the $K^{0}_{1}K^{0}_{1}$ System

Beusch, W. ; Fischer, W.E. ; Gobbi, B. ; et al.

Phys.Lett.B 25 (1967) 357-361, 1967.

Inspire Record 52538 DOI 10.17182/hepdata.29450

We have analyzed 2560 events in the final-state K O 1 K O 1 n produced in π − p interactions at 5, 7 and 12 GeV/ c . We observe the S ∗ (1070), f O and A 2 decaying into K O 1 K O 1 . Resonance parameters, cross sections, and branching ratios are given.

1 data table

Table 1

Cross section times branching ratio.

Reaction K- p --> K- p pi+ pi- at 2.0 GeV/c

Dauber, P.M. ; Schlein, P.E. ; Slater, W.E. ; et al.

Phys.Rev. 153 (1967) 1403-1415, 1967.

Inspire Record 52549 DOI 10.17182/hepdata.29565

An analysis of the reaction K−p→K−pπ+π− at 2.0-GeVc incident momentum is presented. The total cross section for the reaction is 627±20 μb, based on 4519 events. The reaction is dominated by resonance production through several channels which overlap kinematically but do not appear to interferesubstantially. A maximum-likelihood procedure was used to determine the production fractions, which for the major channels are 0.44±0.02 for N*++(1236), 0.145±0.02 for Y*0(1520), 0.10±0.03 for N*+(1688), and 0.20±0.02 for simultaneous K¯*0N*0. Evidence is presented for the production of Y*+(1765) and its decay into Y*0(1520) as well as for production of Y*+(1660) with decay into K−pπ+. A four-standard-deviation enhancement is present at a K−π+ invariant mass of 690 MeV. Angular correlation data are presented for the N*++K−π−, Y*0π+π−, and K¯*0N*0 reaction channels. However, the difficulty of separating the various channels prevents a detailed study of the reaction dynamics.

1 data table

Table 1

No description provided.

Reaction K- p --> Lambda eta from 1.2 to 1.7 GeV/c

Flatte, Stanley M. ; Wohl, Charles G. ;

Phys.Rev. 163 (1967) 1441-1446, 1967.

Inspire Record 52559 DOI 10.17182/hepdata.26566

Total and differential cross sections of the reaction K−p→Λη have been determined for incident K− lab momenta between 1.2 and 1.7 BeVc. No striking resonance formation in the direct channel is seen; in particular, the Y0*(2100) decays not more than 3% via the Λη channel. A prominent forward peak in the differential cross sections indicates some crossed-channel meson-exchange activity. The branching ratio Γ(η→neutrals)Γ(η→π+π−π0) is 3.6±0.6.

1 data table

Table 1

No description provided.

$\pi^{0}$ PHOTOPRODUCTION FROM THE DEUTERON AT FORWARD ANGLES IN THE ENERGY RANGE FROM 900-MeV TO 1400-MeV

Clinesmith, Carl R. ; Tollestrup, Alvin V. ; Walker, Robert Lee ;

RX-184, 1967.

Inspire Record 51564 DOI 10.17182/hepdata.37172

The cross section for the reaction [...] was measured at the Caltech synchrotron. The [...] was detected by measuring its decay gamma rays with two lead glass, total absorption Cherenkov counters. The results are three angular distributions at k = 911, 1180, and 1390 MeV, at forward angles from 3 degrees to 90 degrees. The deuteron/proton ratio differs significantly from 2.0, but final state effects from the use of a deuteron target make impossible quantitative conclusions about the neutron cross section.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Polarization of recoil protons from neutral pion photoproduction

Lundquist, David Eugene ;

PhD Thesis, Stanford U., 1967.

Inspire Record 1408653 DOI 10.17182/hepdata.16895

None

1 data table

Table 1

MEASUREMENTS OF PI0 PHOTOPRODUCTION CROSS-SECTIONS FOR INCIDENT GAMMA-RAY ENERGIES OF 2.0-Gev/c TO 5.0-Gev/c

Bolon, G.C. ; Garelick, C. ; Homma, S. ; et al.

Phys.Rev.Lett. 18 (1967) 926, 1967.

Inspire Record 51286 DOI 10.17182/hepdata.21770

Cross sections for the reaction γ+p→π0+p for incident gamma-ray energies of 2.0 to 5.0 GeV and for baryon four-momentum transfers squared of 0.5 to 4.0 (GeV/c)2 are presented. The results are compared with theoretical predictions based on Reggeized vector-meson exchange.

7 data tables

Table 1

'1'.

Table 2

'1'.

Table 3

'1'.