Gallivan, J.
Max results
Sort by Reverse order

Showing 10 of 6554 results

Date

Tests of Factorization from Single and Double Pion Production in 100 GeV/c $\bar{p}p$ and pp Collisions.

Rushbrooke, John G. ; Ward, D.R. ; Ansorge, R.E. ; et al.
Phys.Rev.Lett. 39 (1977) 117-120, 1977.
Inspire Record 123282 DOI 10.17182/hepdata.20980

Single- and double-pion inclusive spectra are presented for 100-GeV/c p¯p interactions and compared with related pp data. Double-fragmentation distributions are shown to be understood within a Mueller-Regge framework as a product of single-fragmentation distributions. Consideration of pp and p¯p−pp distributions shows factorization to hold in Pomeron and in Reggeon exchanges independently.

1 data table
Table 1

No description provided.


Direct Measurement of the $\pi^-$ Form-Factor.

Dally, E.B. ; Drickey, Darrell James ; Hauptman, J.M. ; et al.
Phys.Rev.Lett. 39 (1977) 1176-1179, 1977.
Inspire Record 123313 DOI 10.17182/hepdata.20975

We have measured the electromagnetic form factor of the charged pion by direct scattering of 100-GeV/c π− from stationary electrons in a liquid-hydrogen target at Fermilab. The deviations from the pointlike pion-scattering cross section may be characterized by a root-mean-square charge radius for the pion of 〈rπ2〉12=0.56±0.04 F.

1 data table
Table 1

No description provided.


Production of $\pi^+$ and $\pi^-$ at Large Transverse Momentum in pp and pd Collisions at 200, 300, and 400 GeV

Antreasyan, D. ; Cronin, J.W. ; Frisch, Henry J. ; et al.
Phys.Rev.Lett. 38 (1977) 112-114, 1977.
Inspire Record 123317 DOI 10.17182/hepdata.3266

We have measured the production of π+ and π− in 200-, 300-, and 400-GeV p−p and 400-GeV p−d collisions for transverse momenta (p⊥) ranging from 0.77 to 7.67 GeV/c. At large values of x⊥=2p⊥s, where s is the c.m. energy, we have fitted the p−p data to the form A(1−x⊥)bp⊥−n; we obtain n=8.2±0.5 for π+ and 8.5±0.5 for π−. At x⊥>0.3 the π+π− ratio in p−p collisions rises appreciably with increasing x⊥ whereas the π+π− ratio obtained from the difference of p−d and p−p cross sections is ∼ 1.0 at all x⊥.

8 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (5 AND 10//(C//).

Table 2

Axis error includes +- 0.0/0.0 contribution (5 AND 10//(C//).

Table 3

Axis error includes +- 0.0/0.0 contribution (5 AND 10//(C//).

More…

Inclusive Production of Nonstrange Mesons in anti-p p Annihilations

The Bombay-CERN-College de France-Madrid collaboration Hamatsu, R. ; Ganguli, S.N. ; Malhotra, P.K. ; et al.
Nucl.Phys.B 123 (1977) 189, 1977.
Inspire Record 111926 DOI 10.17182/hepdata.35452

A study of the inclusive production of π − , η , ϱ 0 , ω ad f mesons in p p annihilation at 0.7 GeV/ c is presented. Topological and channel cross sections are determined. Longitudinal and transversal momentum distributions of non-strange mesons are studied. It is deduced that nearly 48% of all negative pions arise from the decay of η , ϱ 0 , ω and f mesons.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Inclusive rho0 Production in gamma p Interactions at 2.8-GeV, 4.7-GeV, and 9.3-GeV

Kogan, E. ; Ballam, Joseph ; Chadwick, G.B. ; et al.
Nucl.Phys.B 122 (1977) 383-396, 1977.
Inspire Record 110466 DOI 10.17182/hepdata.35449

Inclusive ϱ 0 production in γ p → ϱ 0 + anything is studied at 2.8, 4.7, and 9.3 GeV, using the SLAC linearly polarized backscattered laser photon beam and the 82 inch hydrogen bubble chamber. Over this energy range the inclusive inelastic ϱ 0 cross section rises from 6.0 μb to 20.5 μb. The multiplicity, i.e. the average number of μ 0 mesons per inelastic hadronic event, has an energy dependence consistent with 1n s .

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Inelastic Photoproduction of omega and rho+- Mesons

Nelson, C.A., Jr. ; May, E.N. ; Abramson, J. ; et al.
Phys.Rev.D 17 (1978) 647, 1978.
Inspire Record 4373 DOI 10.17182/hepdata.24401

We report measurements of inelastic photoproduction of ω and ρ± mesons from hydrogen and deuterium at incident photon energies in the range 7.5-10.5 GeV. For ωΔ and ρ−Δ++ production, differential cross sections dσdt′ and spin density matrices are presented. For higher missing masses the cross sections dσdMX2 and invariant structure functions F(x) are also given. The data are compared to a one-pion-exchange model. We conclude that pion exchange is dominant for inelastic ω photoproduction, but unimportant for ρ±.

4 data tables
Table 1

CROSS SECTION PER NUCLEON FOR COMBINED HYDROGEN AND DEUTERIUM DATA ALLOWING FOR A GLAUBER CORRECTION FACTOR OF 0.88 FOR THE DEUTERIUM CROSS SECTIONS.

Table 2

HYDROGEN AND DEUTERIUM DATA COMBINED BY AVERAGING.

Table 3

OBTAINED BY EXTRAPOLATING A FIT TO D(SIG)/DT OVER -T = 0 TO 0.52 GEV**2.

More…

The Real Part of the Forward Proton Proton Scattering Amplitude Measured at the CERN Intersecting Storage Rings

Amaldi, U. ; Cocconi, G. ; Diddens, A.N. ; et al.
Phys.Lett.B 66 (1977) 390-394, 1977.
Inspire Record 110800 DOI 10.17182/hepdata.27584

The real part of the proton proton elastic scattering amplitude has been determined from its interference with the Coulomb amplitude at total centre-of-mass energies up to 62 GeV. The observed steady increase of ϱ with energy indicates that the total proton proton cross section continues to increase well beyond this energy.

2 data tables
Table 1

No description provided.

Table 2

USING SIG AND SLOPE OBTAINED FROM INTERPOLATIONS OF PREVIOUS MEASUREMENTS.


The Reactions K- p --> pi-+ Sigma+- at 4.2-GeV/c

The Amsterdam-CERN-Nijmegen-Oxford collaboration Massaro, G.G.G. ; Barlag, S. ; de Groot, A.J. ; et al.
Phys.Lett.B 66 (1977) 385-389, 1977.
Inspire Record 110532 DOI 10.17182/hepdata.27595

We present differential cross sections and the Σ + polarization for the reactions K − p → π ∓ Σ ± using data from a high statistics bubble chamber experiment at 4.2 GeV/ c incident momentum. The statistical level allows a detailed analysis of these reactions over the whole t range. Several significant structures are observed. Comparisons are made with SU(3)-related reactions; for backward production of π − Σ + such a comparison shows good evidence for Δ exchange. The exotic forward peak in K − p → π + Σ − is definitely confirmed.

7 data tables
Table 1

Axis error includes +- 5/5 contribution.

Table 2

Axis error includes +- 5/5 contribution.

Table 3

Axis error includes +- 5/5 contribution.

More…

New Data on the Reactions K- p --> anti-K0 n and K- p --> K- p Between 1.934-GeV/c and 2.516-GeV/c, Partial Wave Analysis of These Channels and SU(3) Classification of the New Y* States Observed

de Bellefon, A. ; Berthon, A. ; Billoir, Pierre ; et al.
Nuovo Cim.A 42 (1977) 403, 1977.
Inspire Record 111700 DOI 10.17182/hepdata.37594

New data on the K−p elastic and charge exchange reactions are presented in the K− momentum range between 1.934 GeV/c and 2.516 GeV/c. A conventional energy-dependent partial-wave analysis covering the widerPK- range from 1.6 GeV/c to 2.516 GeV/c is presented together with a p.w.a. in which the duality ands-helicity conservation ideas are explicitly imposed in the fits. Finally the new Y*’s observed in this experiment are classified inSU3 multiplets.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Production and Decay Properties of f-prime (1514) in K- p Interactions at 4.2-GeV/c

The Amsterdam-CERN-Nijmegen-Oxford collaboration Barreiro, F. ; Diaz, J. ; Gay, J.B. ; et al.
Nucl.Phys.B 121 (1977) 237-250, 1977.
Inspire Record 111490 DOI 10.17182/hepdata.35514

Results are presented for the hypercharge exchange reaction K − p→ f ′(1514) Λ at a beam momentum of 4.15 GeV/ c . Total and differential cross sections have been determined. The Λ polarization and the tensor meson density matrix elements are given as a function of t ′.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

ALL EVENTS WITH 1.46<M(KS KS)<1.60GEV.