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We have studied the diffractive dissociation into di-jets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t_{min} approaches 0) we find that when the per-nucleus cross-section for this process is parameterized as $ \sigma = \sigma_0 A^{\alpha} $, $ \alpha $ has values near 1.6, the exact result depending on jet transverse momentum. These values are in agreement with those predicted by theoretical calculations of color-transparency.

1 data table match query

Table 1

Cross sections is fitted to A**POWER.

Measurement of the t distribution in diffractive photoproduction at HERA.

The ZEUS collaboration Breitweg, J. ; Derrick, M. ; Krakauer, D. ; et al.

Eur.Phys.J.C 2 (1998) 237-246, 1998.

Inspire Record 452355 DOI 10.17182/hepdata.44323

Photon diffractive dissociation, $\gamma p \to Xp$, has been studied at HERA with the ZEUS detector using $ep$ interactions where the virtuality $Q^2$ of the exchanged photon is smaller than 0.02 GeV$^2$. The squared four-momentum $t$ exchanged at the proton vertex was determined in the range $0.073<|t|<0.40$ GeV$^2$ by measuring the scattered proton in the ZEUS Leading Proton Spectrometer. In the photon-proton centre-of-mass energy interval $176<W<225$ GeV and for masses of the dissociated photon system $4<M_X<32$ GeV, the $t$ distribution has an exponential shape, $dN/d|t| \propto \exp{(-b|t|)}$, with a slope parameter $b=6.8 \pm 0.9$~(stat.)~$ ^{+1.2}_{-1.1}$~(syst.)~GeV$^{-2}$.

2 data tables match query

Table 1

T is the squared four momentum transfer at the proton vertex.

Table 2

SLOPE of the DN/DT distribution.

The (3 $\pi$) - Nucleon Collision in Coherent Production on Nuclei at 40-{GeV}/$c$

Bellini, G. ; Chernenko, L.P. ; Datsko, V.S. ; et al.

Nucl.Phys.B 199 (1982) 1-26, 1982.

Inspire Record 165248 DOI 10.17182/hepdata.49659

Coherent 3 π production on nine different nuclear targets has been studied using a 40 GeV/ c π − beam at the Serpukhov accelerator (CERN-Serpukhov experiment no. 5). The absorption in nuclear matter of the produced system has been measured, analysing the data on the different nuclear targets. Identica results are obtained from the differential cross sections and from the coherent nuclear cross sections. The 1 + waves show a very weak absorption, definitely smaller than 0 − and 2 − waves. No influence on the absorption comes from the spin-flip amplitudes, which have been found to be negligible in the coherent region.

24 data tables match query

Table 1

Data are extracted from graph by JINR data group.

Table 2

Data are extracted from graph by JINR data group.

Table 3

Data are extracted from graph by JINR data group.

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Partial Wave Analysis of Coherent 3 $\pi$ Production on Nuclei at 200-{GeV}

Zielinski, M. ; Berg, D. ; Chandlee, C. ; et al.

Phys.Rev.D 30 (1984) 1855, 1984.

Inspire Record 15136 DOI 10.17182/hepdata.23674

We have carried out a partial-wave analysis (PWA) of three-pion systems produced in the coherent dissociation of π+ mesons on nuclear targets. The data have been analyzed for copper and lead targets at an incident π+ energy of 202.5 GeV. This PWA provides further evidence for resonant contributions to JP=1+ and 0− waves at 3π masses below 1.5 GeV, which can be plausibly identified with A1 and π′ mesons. The contribution from electromagnetic production of the A2 has also been extracted, and an estimate for Coulomb production and radiative width of the A1 has been obtained.

1 data table match query

Table 1

No description provided.

THREE PION PRODUCTION ON NUCLEI AT 200-GEV

Zielinski, M. ; Berg, D. ; Chandlee, C. ; et al.

Z.Phys.C 16 (1983) 197-204, 1983.

Inspire Record 190869 DOI 10.17182/hepdata.16390

We have carried out a systematic study of the coherent dissociation of pions into 3 pions using nuclear targets. The experiment was performed at Fermilab using a high resolution forward spectrometer. Data were taken with carbon, copper and lead targets at an incident momentum of 202.5 GeV/c. Results are presented on momentum transfers, 3-pion masses, and on the nuclearA-dependence of the production cross section.

3 data tables match query

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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STUDY OF DIFFRACTIVE PROCESSES IN EXCLUSIVE CHANNEL anti-p p ---> anti-p p (2 pi+) (2 pi-) AT 32-GeV/c

ON STUDY OF PION MULTIPLE PRODUCTION IN NONDIFFRACTIVE EXCLUSIVE REACTIONS IN K- p INTERACTIONS AT 32.1-GeV/c

CROSS-SECTION OF PARTICLE DIFFRACTIVE PRODUCTION IN ANTI-P P INTERACTIONS AT 32-GEV/C. (IN RUSSIAN)

Charged Particle Multiplicities in $\bar{p} p$ Interactions at 32-{GeV}/$c$

A Study of the Structure of the Events With the Multiparticle Diffraction Dissociation in $K^- p$ Exclusive Reactions at 32-{GeV}/$c$

Observation of color-transparency in diffractive dissociation of pions.

Measurement of the t distribution in diffractive photoproduction at HERA.

The (3 $\pi$) - Nucleon Collision in Coherent Production on Nuclei at 40-{GeV}/$c$

Partial Wave Analysis of Coherent 3 $\pi$ Production on Nuclei at 200-{GeV}

THREE PION PRODUCTION ON NUCLEI AT 200-GEV