Becker, H.
Max results
Sort by Reverse order

Showing 10 of 6030 results

Date

Measurement of the Total Cross-Section Difference for p p Scattering in Longitudinal Spin States

Auer, I.P. ; Colton, E. ; Hill, D. ; et al.
Phys.Lett.B 67 (1977) 113-116, 1977.
Inspire Record 4411 DOI 10.17182/hepdata.27581

We have measured the total cross-section difference for pp scattering in initial spin states parallel to the beam direction at beam momenta of 1.17, 1.47, 1.69, 1.97 and 2.49 GeV/ c . This measurement was done in a standard transmission experiment. A striking energy dependence is observed with a maximum difference of −16.9 mb at P lab = 1.47 GeV/ c .

2 data tables
Table 1

PRELIMINARY RESULTS.

Table 2

PRELIMINARY RESULTS.


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.


Precision Measurement of the K- p --> anti-K0 n Cross-Section Below 1.1-GeV/c

Alston-Garnjost, M. ; Kenney, R.W. ; Pollard, D.L. ; et al.
Phys.Rev.Lett. 38 (1977) 1003, 1977.
Inspire Record 112145 DOI 10.17182/hepdata.21034

We report the results of a precise measurement of the K−p→K¯∘n cross section between 515 and 1065 MeV/c in steps of 10 MeV/c. The statistical errors are less than 1%, a major improvement in accuracy over previous work. No evidence is found for the new I=1 K¯N resonances at 546 and 602 MeV/c reported recently by Carroll et al.

1 data table
Table 1

No description provided.


One, Two and Three Pion Production in p d Collisions at 19-GeV/c

The Scandinavian Bubble Chamber collaboration Bakken, V. ; Gennow, H. ; Jacobsen, T. ; et al.
Nucl.Phys.B 124 (1977) 229-254, 1977.
Inspire Record 111511 DOI 10.17182/hepdata.35429

We present cross sections for coherent and non-coherent production of one, two and three pions in pd reactions at 19 GeV/ c . The mass distributions of the two pion non-coherent channels are studied. Strong single Δ(1236) and also some double Δ production is observed. Clear evidence for ϱ production is seen.

1 data table
Table 1

SLOPE FITTED FOR -TP = 0.00 TO 0.14 GEV**2.


Phi-Meson Production in the Reactions pi+- n --> K- K+ n at 6-GeV/c

Cohen, Daniel H. ; Ayres, D.S. ; Diebold, R. ; et al.
Phys.Rev.Lett. 38 (1977) 269, 1977.
Inspire Record 110508 DOI 10.17182/hepdata.21019

A sample of 1200 ϕ mesons produced in the Zweig-rule-forbidden reactions π±N→ϕN shows a flat t distribution (slope=1.7 ± 0.2 GeV−2) and a cross section suppressed by 0.0032±0.0004 relative to π−p→ωn. Natural-parity-exchange ω and ϕ production have similar t dependences, while ω and ϕ production by unnatural-parity exchange differ markedly. Interference between the ϕ and the underlying K¯K S wave indicates substantial nucleon-spin incoherence between the amplitudes for ϕ and S-wave production.

3 data tables
Table 1

Axis error includes +- 10/10 contribution (RES-DEF(RES=PHI,BACK=CORRECTED)).

Table 2

Axis error includes +- 10/10 contribution (RES-DEF(RES=PHI,BACK=CORRECTED)).

Table 3

STATISTICAL ERRORS ONLY.


A Study of Inclusive xi- Production from K- p Interaction at 4.2-GeV/c

The Amsterdam-CERN-Nijmegen-Oxford collaboration Ganguli, S.N. ; Berge, J.P. ; Gavillet, P. ; et al.
Nucl.Phys.B 128 (1977) 408-420, 1977.
Inspire Record 111753 DOI 10.17182/hepdata.36076

A study of inclusive Ξ − production from a high statistics K − p experiment at 4.2 GeV/ c has been made. The total Ξ − production cross section is 157 ± 8 μ b. Approximately 15% of the Ξ − arise from decay of the Ξ ∗0 (1530) resonance. The polarization of the Ξ − is found to be negative and is nearly equal in value to that of the Λ 0 from the inclusive reaction K − + p → Λ 0 + anything. An analysis of the inclusive production of Ξ − has been made in the framework of the triple-Reege formalism.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


rivet Analysis
The Total Hadronic Cross-Section for e+ e- Annihilation Between 3.1-GeV and 4.8-GeV Center-Of-Mass Energy

The PLUTO collaboration Burmester, J. ; Criegee, L. ; Dehne, H.C. ; et al.
Phys.Lett.B 66 (1977) 395-400, 1977.
Inspire Record 110272 DOI 10.17182/hepdata.27583

Using the solenoidal magnetic detector PLUTO, we have measured the total cross section for e + e − annihilation into hadrons. Results are presented for center of mass energies between 3.6 and 4.8 GeV, and in the regions of the J ψ (3.1) and ψ(3.7) resonances. We also present results for the 2 prong cross section in the energy range 3.6 to 4.8 GeV.

2 data tables
Table 1

No description provided.

Table 2

NUMBERS MEASURED OFF PUBLISHED FIGURE. RADIATIVE CORRECTIONS HAVE BEEN APPLIED.


Observation of an Anomalous Structure in Proton Polarization from Deuteron Photodisintegration

Kamae, T. ; Arai, I. ; Fujii, T. ; et al.
Phys.Rev.Lett. 38 (1977) 468, 1977.
Inspire Record 110084 DOI 10.17182/hepdata.21021

Proton polarization in γd→pn has been measured at c.m. angle around 90° and photon energies from 325 to 725 MeV. The polarization increases sharply with the photon energy, reaching a high maximum of (-80±8)% around 500-550 MeV. Such a high polarization with a sharp energy dependence seems to indicate a new effect in the dibaryon system.

1 data table
Table 1

No description provided.


Polarization in pi- p Elastic Scattering at 1180-MeV/c, 1250-MeV/c, and 1360-MeV/c

Barrelet, E. ; Chamberlain, O. ; Gorn, W. ; et al.
Phys.Rev.D 15 (1977) 2435, 1977.
Inspire Record 110059 DOI 10.17182/hepdata.24619

We have measured the polarization parameter in π−p elastic scattering at laboratory momenta of 1180, 1250, and 1360 MeV/c in the angular interval 65°<θc.m.<115°. The results were used to show that the polarized target used in these (and other similar) experiments was uniformly polarized. These measurements were also used to resolve pre-existing experimental discrepancies in the determination of the polarization parameter, and to clarify the behavior of scattering amplitudes in this energy range. We show that local measurements of this type are important in resolving discrete ambiguities affecting the energy continuation of the amplitudes. An important by-product of this experiment is the development of a fast method of reconstructing particle trajectories and fitting the elastic events, which could have a significant impact for future high-statistics experiments.

1 data table
Table 1

No description provided.


Energy and Momentum Distributions of Muoproduced Hadrons

del Papa, C. ; Dorfan, David E. ; Flatte, Stanley M. ; et al.
Phys.Rev.D 15 (1977) 2425, 1977.
Inspire Record 109678 DOI 10.17182/hepdata.24649

We present inclusive distributions for final-state hadrons produced in inelastic muon-proton scattering. Over the total energy range 2<W<4.7 GeV and the momentum-transfer range 0.3<Q2<4.5 GeV2, the fractional momentum and energy distributions approximately scale. Distributions in transverse momentum display an interesting two-component behavior. They show no dependence on the virtual-photon "mass squared" Q2, and have average values typical of other hadron-initiated reactions. A comparison of our distributions with those seen in e+e− annihilation and neutrino-nucleon scattering shows agreement, in support of quark-parton fragmentation ideas. We further break these distributions down by event topology.

7 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…