HEPData Search

Reverse order

Showing 7 of 7 results

Measurement of monochromatic pi0 and eta mesons in antiproton deuterium annihilation at rest.

Chiba, M. ; Fujitani, T. ; Iwahori, J. ; et al.

KEK-PREPRINT-97-247, 1998.

Inspire Record 467591 DOI 10.17182/hepdata.38331

None

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Anti-proton Proton Annihilation at Rest Into $\pi^0$ M and $\gamma$ M With M = $\phi$, $\eta^\prime$, $\omega$, $\rho^0$, $\eta$, and $\pi^0$

The Fukui-KEK-Kyoto Sangyo-Osaka-Tokyo Metropolitan collaboration Chiba, M. ; Fujitani, T. ; Iwahori, J. ; et al.

Phys.Rev.D 38 (1988) 2021, 1988.

Inspire Record 263258 DOI 10.17182/hepdata.23277

We have carried out high-statistics measurements of inclusive π0 and γ-ray spectra from p¯p annihilation at rest. From the monochromatic peaks in the π0 spectra, we derive the yield (or its upper limit) of the reaction p¯p→π0M for M=φ, η’, ω, ρ0, η, and π0. The same quantity was independently obtained from the γ-ray spectra, which included some π0’s that were mistaken as single γ rays due to the limited granularity of the γ detector. Taking the monochromatic peaks in the γ-ray spectra as being due to prompt γ rays, we also derive the upper limit for p¯p→γM.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Search for Narrow Peaks in Inclusive $\pi^0$ Spectra From $\bar{p} p$ Annihilation at Rest

The Fukui-Tokyo-KEK-Kyoto Sangyo-Osaka-Tokyo Metropolitan collaboration Chiba, M. ; Doi, K. ; Fujitani, T. ; et al.

Phys.Lett.B 202 (1988) 447-452, 1988.

Inspire Record 252965 DOI 10.17182/hepdata.38510

By using modularized NaI(Tl) detectors, we carried out a high statistics measurement of inclusive π 0 spectra from p p annihilation at rest. We did not observe any narrow π 0 peaks arising from baryonium production, p p →π 0 B . The σ upper limit of the yield varied between 10 −2 and 10 −4 depending on the mass and oncharge multiplicity. Three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of p p → γ B .We also derived the yield of p p annihilation into π 0 M for M = ø , η ′, ω , ϱ 0 , η and π 0 .

1 data table

Table 1

No description provided.

Measurement of Neutrino - Proton and anti-neutrino - Proton Elastic Scattering

Ahrens, L.A. ; Aronson, S.H. ; Connolly, P.L. ; et al.

Phys.Rev.D 35 (1987) 785, 1987.

Inspire Record 18763 DOI 10.17182/hepdata.23350

Measurements of the semileptonic weak-neutral-current reactions νμp→νμp and ν¯μp→ν¯μp are presented. The experiment was performed using a 170-metric-ton high-resolution target detector in the BNL wide-band neutrino beam. High-statistics samples yield the absolute differential cross sections dσ(νμp)/dQ2 and dσ(ν¯μp)/dQ2. A measurement of the axial-vector form factor GA(Q2) is also presented. The results are in good agreement with the standard model SU(2)×U(1). The weak-neutral-current parameter sin2thetaW is determined to be sin2θW=0.220±0.016(stat)−0.031+0.023(syst).

1 data table

Table 1

Errors contain both statistics and systematics, except for additional overall normalisation error given above. Neutrino energy is 0 to 5 GeV with peak at 0.8 Gev.

Anti-p p annihilation into pi+ rho at small angles between 1 and 2 gev/c

Yoh, J.K. ; Barish, B. ; Nicholson, H.W. ; et al.

Phys.Rev.Lett. 26 (1971) 922-925, 1971.

Inspire Record 69017 DOI 10.17182/hepdata.21588

We have studied the process p¯p into π+X− using wire spark chambers. The data cover the angular range of cosθp¯π+* between 0.96 and 1.0 at several incident momenta between 1 and 2 GeVc. The reaction p¯p→π+ρ− was observed with (dσdΩ)* of the order of 100 μb/sr at several momenta.

1 data table

Table 1

READ FROM GRAPH.