de Bellefon, A.
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Backward production of rho0 and f0 mesons in pi+ n interactions at 6 gev/c

Dado, S. ; Engler, A. ; Kraemer, R.W. ; et al.
Phys.Lett.B 50 (1974) 275-279, 1974.
Inspire Record 95262 DOI 10.17182/hepdata.27950

Backward production of ϱ 0 and f 0 mesons in π + n interactions at 6 GeV/ c is presented. Total and differential cross sections are reported along with spin density matrix elements.

6 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

JACKSON (U) FRAME (Z=2).

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Large angle pi+ p elastic scattering at 10 gev/c

Baglin, C. ; Briandet, P. ; Carlson, P.J. ; et al.
Phys.Lett.B 47 (1973) 85-88, 1973.
Inspire Record 95213 DOI 10.17182/hepdata.28033

The angular distribution of π + p elastic scattering has been measured at an incident momentum of 10 GeV/ c . Nearly the whole angular range was covered in one experimental set-up. The pronounced dip at − t = 2.8 (GeV/ c ) 2 , observed at lower momenta, has diminished and is essentially a shoulder at 10 GeV/ c . The other structure at larger momentum transfers are also different in detail from what we observed at 5 GeV/ c . In the 90° c.m. region the differential cross-section is approximately one nb/(GeV/ c ) 2 , which is more than two orders of magnitude lower than at 5 GeV/ c .

1 data table
Table 1

THESE DATA ARE REPORTED MORE FULLY IN C. BAGLIN ET AL., NP B98, 365 (1975).


Differential cross-sections for anti-p p ---> pi- pi+, k- k+ between 0.8 and 2.4 gev/c

Eisenhandler, E. ; Gibson, W.R. ; Hojvat, C. ; et al.
Phys.Lett.B 47 (1973) 531-535, 1973.
Inspire Record 95394 DOI 10.17182/hepdata.28034

We present measurements from a spark chamber experiment of the differential cross-sections for p p → π − π + , K − K + at 20 momenta in the range 0.8–2.4 GeV/ c (c.m. energy 2.02 to 2.57 GeV). The c.m. angular range was −0.95 < cos θ ∗ < 0.95 . There are about 2000π − π + events and about 300 K − K + events at each momentum.

1 data table
Table 1

ALL ANGLES.


Results on the production cross-sections pi- p ---> neutrals and pi- p ---> chi0(2gamma) n at 3.8, 6, 8 and 12 gev/c

Apel, W.D. ; Auslaender, J. ; Mueller, H. ; et al.
Phys.Lett.B 46 (1973) 459-464, 1973.
Inspire Record 95163 DOI 10.17182/hepdata.28058

The ratio between the cross sections for the reactions π − p→ χ ↳ 2γ 0 n and π − p → η →2 γ n has been measured to be (2.4 ± 0.9) × 10 −2 , (2.1 ± 0.6) × 10 −2 and (2.8 ± 1.3) × 10 −2 at 3.8,6,8 and 12 GeV/ c incident momentum respectively.

1 data table
Table 1

ETAPRIME CROSS SECTIONS DEDUCED FROM THEIR RATIO TO ETA PRODUCTION, USING THE RESULTS OF O. GUISAN ET AL., PL 18, 200 (1965).


Structure in the omega pi pi System at the A2 Mass Region

Karshon, U. ; Mikenberg, G. ; Pitluck, S. ; et al.
Phys.Rev.Lett. 32 (1974) 852, 1974.
Inspire Record 761 DOI 10.17182/hepdata.21283

Evidence is presented for an enhancement in the ωππ mass spectrum at the A2 mass region in π+p interactions at 5 GeV/c. Assuming this effect to be the A2, we calculate the decay rate relative to the ρπ decay mode and obtain the results 0.29 ± 0.08 and 0.10 ± 0.04 for the two final states A20Δ++ and A2+p, respectively. Possible explanations of the discrepancy between these numbers are suggested.

1 data table
Table 1

No description provided.


K+ p Elastic Scattering from 130-MeV/c to 755-MeV/c

Cameron, W. ; Hirata, A.A. ; Jennings, R. ; et al.
Nucl.Phys.B 78 (1974) 93-109, 1974.
Inspire Record 89485 DOI 10.17182/hepdata.32220

Differential cross sections for the elastic scattering of K + mesons on protons have been measured at 12 lab momenta between 130 and 755 MeV/ c using a hydrogen filled bubble chamber. The results are consistent with a repulsive S-wave nuclear force. A phase-shift analysis yielded the following values of the low-energy parameters: a S 1 2 =(0.309±0.002) fm , r S 1 2 =(0.032±0.02) fm a P 1 2 =(0.021±0.002) fm , a P 3 2 =(0.013±0.001) fm 3

13 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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pi0 and rho0 Photoproduction from 6-GeV to 18-GeV

Barish, B. ; Gomez, R. ; Kreinick, D. ; et al.
Phys.Rev.D 9 (1974) 566, 1974.
Inspire Record 94529 DOI 10.17182/hepdata.21952

Differential cross sections for π0 and ρ0 photoproduction from protons have been measured at photon energies 6, 12, and 18 GeV and momentum transfers 0.5 to 3 (GeVc)2.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Negative Pion Production in Proton Proton Interactions at 69-GeV/c

The French-Soviet collaboration Bumazhnov, V.A. ; Ermolov, P.F. ; Fenyuk, A.S. ; et al.
Phys.Lett.B 50 (1974) 283-286, 1974.
Inspire Record 89197 DOI 10.17182/hepdata.27949

Inclusive spectra of π − production for pp interactions are discussed at 69 GeV/ c both in the central and in the fragmentation region and are compared to data at lower and higher energies. The p T dependence of the invariant structure function is also analysed.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A Study of the Reaction anti-p n --> anti-p p pi- at 14.6-GeV/c

Brucker, E.B. ; Koller, E.L. ; Raths, O. ; et al.
Phys.Rev.D 10 (1974) 1373, 1974.
Inspire Record 89251 DOI 10.17182/hepdata.25045

From a 98000-photograph exposure of the BNL 80-in. deuterium-filled chamber to a 14.6-GeV/c p¯ beam we have extracted those events that fit the channel p¯n→p¯pπ−. The cross section for this channel is measured to be 730 ± 50 μb. The cross section for the reaction p¯n→Δ¯−−(1238)p is determined to be 130 ± 30 μb. Evidence for target dissociation is presented. A comparison with the reaction π−n→π−pπ− at the same energy indicates agreement with factorization.

1 data table
Table 1

No description provided.


An Investigation of rho Meson Production in pi p Interactions at 3.9-GeV/c

Haber, B. ; Hodous, M.F. ; Hulsizer, R.I. ; et al.
Phys.Rev.D 10 (1974) 1387, 1974.
Inspire Record 819 DOI 10.17182/hepdata.25008

We have investigated the ρ-meson production mechanism in the three reactions π±p→ρ±p and π−p→ρ0n at 3.9 GeV/c (s=8.2 GeV2) using the prism-plot technique. Differential cross sections at all momentum transfers are presented. A significant backward peak has been found in all three reactions. The differential cross sections for these backward peaks are given and are compared with the equivalent pion elastic and charge-exchange cross sections in the backward direction. Using a linear combination of the three differential cross sections we have isolated the I=0 exchange contribution in the forward direction. This differential cross section has a zero at −t=0.45 (GeV/c)2 and is fitted by the dual absorptive model of Harari with an interaction radius of ∼ 1.2 F. The total I=0 cross section is calculated and compared with similarly determined cross sections at higher momenta. An analysis of the properties of the other possible spin-parity exchanges is also presented.

8 data tables
Table 1

SLOPE FITTED OVER 0.05 < -T < 0.3 GEV**2.

Table 2

No description provided.

Table 3

No description provided.

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