HEPData Search

The p p elastic differential cross section at 50 GeV/c has been measured in a two-arm spectrometer experiment at the CERN SPS. The | t | range covered extends from 0.7 to 5 (GeV/c. A pronounced dip-bump structure is observed with a sharp minimum at | t | = 1.5 (GeV/ c ) 2 .

1 data table

Table 1

No description provided.

PRODUCTION OF F-prime (1520) IN 8.25-GEV/C K- P INTERACTIONS

The BIRMINGHAM-CERN-GLASGOW-MICHIGAN STATE-PARIS collaboration Al- Harran, S. ; Baubillier, M. ; Bloodworth, I.J. ; et al.

Nucl.Phys.B 191 (1981) 26-38, 1981.

Inspire Record 172450 DOI 10.17182/hepdata.34233

We present results for the hypercharge exchange reaction K − p→f' λ from a high statistics experiment at 8.25 GeV/ c using the CERN 2m HBC. The total and differential cross sections have been measured; the polarisation of the Λ hyperon and the f' density matrix elements have been calculated as functions of momentum transfer. We also present detailed information on the relative strength of the natural and unnatural parity exchange contributions to the production mechanism.

5 data tables

Table 1

D-WAVE RELATIVISTIC BREIT-WIGNER RESONANCE PLUS POLYNOMIAL BACKGROUND FIT.

Table 2

FITTED FOR INDIVIDUAL TP BINS.

Table 3

No description provided.

More…

Production of $\rho^\pm$, $G^\pm$(1700), $A2^\pm$, $K^{\pm}$(890) and $K^{\pm}$(1420) at 50-{GeV}/c

Delfosse, A. ; Dorsaz, P.A. ; Extermann, P. ; et al.

Nucl.Phys.B 183 (1981) 349-366, 1981.

Inspire Record 170363 DOI 10.17182/hepdata.34280

Mesons decaying into π 0 or η and one charged meson were studied using a liquid-argon calorimeter in a non-magnetic double-arm spectrometer. Cross sections and energy dependences are presented. The ϱ ± production mechanisms are discussed in detail: ω and π exchange contribute the largest fractions, but also A 2 exchange is present. ϱ ± production by ω exchange is shown to follow the energy behaviour predicted by the Regge trajectory α ω ( t ) = 0.4 − | t |.

2 data tables

Table 1

Axis error includes +- 0.0/0.0 contribution (13 TO 25////STATISTICAL ERRORS ARE SMALLER THAN THE SYSTEMATIC ERRORS).

Table 2

No description provided.

Evidence for a New Pseudoscalar Meson

Bonesini, M. ; Donald, R.A. ; Edwards, D.N. ; et al.

Phys.Lett.B 103 (1981) 75-78, 1981.

Inspire Record 170357 DOI 10.17182/hepdata.31149

Performing a PWA of the π − π − π + system over the −t p/p range 0.2 to 0.4 GeV 2 we find evidence for a J P = 0 − , J G =1 − meson of mass 1342 ± 20 MeV and width 220 ±70 MeV decaying into ϵπ. This state is produced by natural parity exchange with a slope similar to that of elastic scattering. It can be interpreted as a radial excitation of the π meson (π′).

1 data table

Table 1

INTEGRATING EXTRAPOLATED EXPONENTIAL FIT GIVES A TOTAL CROSS SECTION OF ABOUT 54 MUB.

DETERMINATION OF LARGE ANGLE CROSS-SECTIONS FOR pi- p ---> pi- DELTA+ AT 5-GeV/c

Carlson, P.J. ; Johansson, K.E. ; Eide, A. ; et al.

Nuovo Cim.A 62 (1981) 196, 1981.

Inspire Record 164127 DOI 10.17182/hepdata.37544

We have measured the differential cross-section for the process π-+p → π- + Δ+ in thet interval (1.74/3.5) (GeV/c)2 at 5 GeV/c. At the largestt-values, the cross-sections have the same magnitude as the π-p elastic cross-sections.

1 data table

Table 1

No description provided.

QUASIELASTIC OMEGA PHOTOPRODUCTION AT 50-GEV - 130-GEV

Breakstone, A.M. ; Cheng, D.C. ; Dorfan, D.E. ; et al.

Phys.Rev.Lett. 47 (1981) 1782-1785, 1981.

Inspire Record 173081 DOI 10.17182/hepdata.20625

A study of quasielastic ω photoproduction where the ω was detected in its π0γ decay mode is reported. The recoil proton's angle was detected with a nonmagnetic spectrometer allowing a full reconstruction of the final state. Differential cross sections for 0.1<|t|<1.2 GeV2 are presented, providing a test of the vector-meson dominance model over an extensive energy and momentum transfer range. The shape of the differential cross section agrees with that seen in both elastic γp and πp scattering as expected from this model.

4 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Elastic Photon Proton Scattering in the 50-{GeV} - 130-{GeV} Range

Breakstone, A.M. ; Cheng, D.C. ; Dorfan, D.E. ; et al.

Phys.Rev.Lett. 47 (1981) 1778-1781, 1981.

Inspire Record 173082 DOI 10.17182/hepdata.20627

In the tagged-photon beam at Fermilab, differential cross sections were measured for the elastic scattering of photons on a liquid-hydrogen target. The diffractive forward peak was measured for photon energies between 50 and 130 GeV and |t| values between 0.07 and 1.20 (GeV/c)2. The shape of the diffraction peak is similar to that seen in π−p scattering. The magnitude is that predicted by the optical theorem.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.