Massimo, J.T.
Max results
Sort by Reverse order

Showing 10 of 2392 results

Observation of the Low-Energy Lambda-p Interaction

Melissinos, A.C. ; Reay, N.W. ; Reed, J.T. ; et al.
Phys.Rev.Lett. 14 (1965) 604-607, 1965.
Inspire Record 49710 DOI 10.17182/hepdata.21848

None

1 data table
Table 1

No description provided.


Interactions of 4.09-gev/c positive pions with protons - pi+ p ---> four charged particles plus neutrals

Fong, D.G. ; Massimo, J.T. ; Pitluck, S. ; et al.
Phys.Rev.D 9 (1974) 3015-3028, 1974.
Inspire Record 94287 DOI 10.17182/hepdata.21980

The reactions of positive pions with protons yielding four charged particles and one or more neutrals have been studied, especially the reaction π+p→Δ++ω0→pπ+π+π−π0. The results presented in this paper were obtained from a 100 000-picture exposure of the Argonne-MURA 30-in. liquid hydrogen bubble chamber, with a beam of incident pions of 4.09−GeVc momentum. Comparisons have been made with corresponding results of other experiments at various incident beam momenta, and with the predictions of some theoretical models of the π+p interaction.

4 data tables
Table 1

INCLUDING CORRECTIONS FOR BACKGROUND.

Table 2

No description provided.

Table 3

No description provided.

More…

pi pi Scattering and pi+ d Interactions at 7-GeV/c

Carroll, J.T. ; Matthews, J.A.J. ; Walker, W.D. ; et al.
Phys.Rev.D 10 (1974) 1430, 1974.
Inspire Record 91650 DOI 10.17182/hepdata.25036

Using bubble-chamber data on the reactions π+d→pspπ0π0, π+d→pspπ+π−, and π−p→nπ+π− at 7 GeV/c incident π momentum, π−π phase shifts are determined for 0.6<M(ππ)<1.5 GeV/c2. An I=0S-wave resonance is observed in the f0 peak region of M(ππ). Constructive ρ−ω interference is found in the reaction π+n→pπ+π− and evidence is presented for some specifically deuteron effects in the data with large spectator-proton momentum.

6 data tables
Table 1

TWO-PRONG CROSS SECTIONS IN DEUTERIUM WITH SPECTATOR PROTON MOMENTUM CUT AT 0.3 GEV/C.

Table 2

NOTE THAT THE LOW-T DATA POINTS (<0.1 GEV**2) SHOULD BE CORRECTED FOR PAULI EXCLUSION IN DEUTERIUM.

Table 3

FROM FIT WITH BREIT-WIGNER RESONANCES PLUS PHASE SPACE.

More…

The Reactions pi+- p --> p pi+- pi+ pi- at 18.5-GeV/c

Lichtman, S. ; Biswas, N.N. ; Cason, N.M. ; et al.
Nucl.Phys.B 81 (1974) 31-44, 1974.
Inspire Record 1364 DOI 10.17182/hepdata.32176

Studies have been made of the reactions π + p→p π + π + π − and π − p→p π + π − π − , both at an incident pion momentum of 18.5 GeV/ c . The two-body (primarily Δ ++ and ϱ o and three-body (low-mass A enhancement, A 3 , N ∗ (1400), and N ∗ (1700)) subsystems are discussed. Cross sections for all significant channels of the reactions are given.

1 data table
Table 1

No description provided.


Anti-Nucleon Production in Colliding e+ e- Beams at SPEAR

Berk, D. ; Buchanan, C.D. ; Drickey, Darrell James ; et al.
Lett.Nuovo Cim. 9 (1974) 475-478, 1974.
Inspire Record 3185 DOI 10.17182/hepdata.37333

None

1 data table
Table 1

ONE EVENT SEEN - PROBABLY AN ANTIPROTON.


Experimental Upper Limit on the Photoproduction Cross-Section for the psi (3105)

Martin, J.F. ; Bolon, C. ; Lanza, R.L. ; et al.
Phys.Rev.Lett. 34 (1975) 288, 1975.
Inspire Record 91767 DOI 10.17182/hepdata.21195

The experimental upper limit for the diffractive photoproduction of the ψ(3105) is 29 nb, with 90% confidence, at an average photon energy of 18.2 GeV.

1 data table
Table 1

No description provided.


Measurement of e+ e- ---> e+ e- and e+ e- ---> mu+ mu- at SPEAR

Augustin, J.E. ; Boyarski, A. ; Breidenbach, Martin ; et al.
Phys.Rev.Lett. 34 (1975) 233, 1975.
Inspire Record 91755 DOI 10.17182/hepdata.21210

The reactions e+e−→e+e− and e+e−→μ+μ− have been measured at center-of-mass energies 3.0, 3.8, and 4.8 GeV and production angles of 50°<θ<130° over all azimuthal angles. Agreement with quantum electrodynamics is excellent. New limits for cutoff parameters in quantum-electrodynamic-breakdown models are given.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Discovery of a Narrow Resonance in $e^+ e^-$ Annihilation

The SLAC-SP-017 collaboration Augustin, J.E. ; Boyarski, A. ; Breidenbach, Martin ; et al.
Phys.Rev.Lett. 33 (1974) 1406-1408, 1974.
Inspire Record 91761 DOI 10.17182/hepdata.21247

We have observed a very sharp peak in the cross section for e+e−→hadrons, e+e−, and possibly μ+μ− at a center-of-mass energy of 3.105±0.003 GeV. The upper limit to the full width at half-maximum is 1.3 MeV.

1 data table
Table 1

No description provided.


rivet Analysis
Total Cross-Section for Hadron Production by electron-Positron Annihilation Between 2.4-GeV and 5.0-GeV Center-Of-Mass Energy

Augustin, J.E. ; Boyarski, A. ; Breidenbach, Martin ; et al.
Phys.Rev.Lett. 34 (1975) 764, 1975.
Inspire Record 100592 DOI 10.17182/hepdata.21227

The total cross section for hadron production by e+e− annihilation has been measured at center-of-mass energies between 2.4 and 5.0 GeV. Aside from the very narrow resonances ψ(3105) and ψ(3695), the cross section varies between 32 and 17 nb over this region with structure in the vicinity of 4.1 GeV.

2 data tables
Table 1

No description provided.

Table 2

MEAN CHARGED MULTIPLICITY. ERRORS ARE STATISTICAL ONLY.


Evidence for anomalous lepton production in e+ e- annihilation.

Perl, Martin L. ; Abrams, G.S. ; Boyarski, A. ; et al.
Phys.Rev.Lett. 35 (1975) 1489-1492, 1975.
Inspire Record 100634 DOI 10.17182/hepdata.21164

We have found events of the form e++e−→e±+μ∓+missingenergy, in which no other charged particles or photons are detected. Most of these events are detected at or above a center-of-mass energy of 4 GeV. The missing-energy and missing-momentum spectra require that at least two additional particles be produced in each event. We have no conventional explanation for these events.

1 data table
Table 1

X IN RE INCLUDES TWO OR MORE UNDETECTED PARTICLES.