Two-body hyperon production by 5.7 gev/c anitprotons on protons

Atherton, H.W. ; Celnikier, L.M. ; French, B. ; et al.
Phys.Lett.B 30 (1969) 494-497, 1969.
Inspire Record 56634 DOI 10.17182/hepdata.28892

Total and differential cross sections are presented on the reactions: p ̄ p → Λ Λ, ΛΣ 0 + c.c. , Σ + Σ + at an incident momentum of 5.7 GeV/ c , from 200 000 photographs (13 events/ Σ b) of the CERN 2 metre hydrogen bubble chamber. The “forbidden” reaction p ̄ p → Σ − Σ − is also observed and its cross section is 1.3 ± 0.4 μ b. Polarization and correlation of polarizations are presented for the reaction p ̄ p → Λ Λ .

1 data table

No description provided.


General characteristics of the annihilation reaction p p ---> 3pi+ 3pi- (pi0) at 3.6 gev/c

Atherton, H.W. ; Blair, W.M.R. ; Celnikier, L.M. ; et al.
Nucl.Phys.B 18 (1970) 221-245, 1970.
Inspire Record 62649 DOI 10.17182/hepdata.34415

In the reaction p p → 3π + 3π − 2227 events, and in the reaction p p → 3π + 3π − π 0 6578 events have been analyzed. The general characteristics of the reactions, such as total cross sections, angular and momentum distributions, the production of ϱ, f, ω and η mesons, and angular correlations are presented.

4 data tables

No description provided.

THETA being the angle between PI+ and P (or PI- and PBAR) in CMS.

THETA being the angle between PI+ and P (or PI- and PBAR) in CMS.

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Y*(1385) production in anti-p reactions at 5.7 gev/c

Atherton, H.W. ; Celnikier, L.M. ; Clayton, M.J. ; et al.
Nucl.Phys.B 29 (1971) 477-503, 1971.
Inspire Record 68633 DOI 10.17182/hepdata.33412

From a bubble chamber exposure in an antiproton beam at 5.7 GeV/ c yielding 13 events/μb, the final states p ̄ p → Y 1 ∗+ (1385)Λ, Y 1 ∗+ (1385)Σ + , Y 1 ∗+ (1385) Y 1 ∗+ (1385) have been isolated. We have measured the total cross section, d σ /d t , and the complete density matrix of the Y ∗ for these processes. Upper limits have been set to the forbidden reactions p ̄ p → Y 1 ∗− (1385)Σ − , Y 1 ∗− (1385) Y 1 ∗− (1385) .

35 data tables

VALUE OF PRODUCTION CROSS-SECTION IN TEXT HALVED AS INCLUDED CHARGE CONJUGATE REACTION.

VALUE OF PRODUCTION CROSS-SECTION IN TEXT HALVED AS INCLUDED CHARGE CONJUGATE REACTION.

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Energy dependence of pi-, K- and anti-p total cross-sections on protons in the momentum range up to 65-GeV/c

Denisov, S.P. ; Dmitrevsky, Yu.P. ; Donskov, S.V. ; et al.
Phys.Lett.B 36 (1971) 528-532, 1971.
Inspire Record 67295 DOI 10.17182/hepdata.28394

π − p , K − p and p p total cross-sections are measured at momenta up to 65GeV/ c with statistical accuracy 0.3 ÷ 0.6% and systematical (scale) error ≈ 0.4%.

3 data tables

No description provided.

No description provided.

No description provided.


Measurement of the electron-positron annihilation cross-section into pi+ pi-, k+ k- pairs at the total energy 1.18-1.34 gev

Balakin, V.E. ; Budker, G.I. ; Kurdadze, L.M. ; et al.
Phys.Lett.B 41 (1972) 205-208, 1972.
Inspire Record 75634 DOI 10.17182/hepdata.28229

Using the electron-position storage ring VEPP-2 an experiment has been performed in which the cross-sections of the reactions e + e − → π + π − and e + e − →K + K − were measured in the energy regi on 1.18–1.34 GeV. The experimental values of the formfactors lie higher than curves extrapolated from the ϱ- and ϕ-meson region.

2 data tables

No description provided.

No description provided.


Search for magnetic monopoles at the 70 gev iphe proton synchrotron

Gurevich, I.I. ; Khakimov, S.K. ; Martemyanov, V.P. ; et al.
Phys.Lett.B 38 (1972) 549-550, 1972.
Inspire Record 75823 DOI 10.17182/hepdata.28325

The result of a search for magnetic charged particles at 70 GeV IPHE proton synchrotron is presented. Using the ferromagnetic trap method the upper limit of the magnetic monopole production cross-section in proton-nucleon collisions was found to be α (95%) ⩾ × 10 −43 cm 2 .

1 data table

No description provided.


Measurements of pi- p ---> pi0 n reaction cross-section in the momentum range up to 50 gev/c

Bolotov, V.N. ; Devishev, M.I. ; Devisheva, M.N. ; et al.
Phys.Lett.B 38 (1972) 120-122, 1972.
Inspire Record 75878 DOI 10.17182/hepdata.28338

Cross-section data are presented for pion proton charge-exchange scattering in the momentum range 20 to 50 GeV/ c . The experiments were performed at 70 GeV IHEP accelerator.

1 data table

No description provided.


Analysis of the q in k- d ---> k- pi- pi+ d and k- d ---> k- pi- pi+ n p(s) at 7.3 gev/c

Anderson, K.J. ; Franklin, A.D. ; Godden, G.D. ; et al.
Phys.Rev.D 6 (1972) 1823-1833, 1972.
Inspire Record 83144 DOI 10.17182/hepdata.22254

Results from the study of reactions (1) K−d→K−π−π+d and (2) K−d→K−π−π+nps at 7.3 GeV/c are presented. The interactions are dominated by the production of K*(890), ρ(765), Q(1200−1450), and D*(2200) in (1) and Δ−(1236) in (2). Observation of ρ(765) and its possible source as a misidentified K*(890) is discussed. Evidence is observed of splitting of the Q into two resonances with masses and widths (in MeV) M1=1228±21, Γ1=111±33, M2=1414±15, and Γ2=89±24, L(1775) is observed in (1). An off-shell one-pion-exchange-model calculation is compared to (2). Cross sections and branching ratios of the Q resonances are estimated on the basis of the model.

1 data table

Q (OR K(A)) CROSS SECTIONS MODEL-DEPENDENT WITH BACKGROUND UNSUBTRACTED.


Observation of the *forbidden* double charge exchange reaction anti-p p ---> antisigma- sigma- at 3.6 gev/c

Atherton, H.W. ; Celnikier, L.M. ; French, B.R. ; et al.
Phys.Lett.B 42 (1972) 522-526, 1972.
Inspire Record 84969 DOI 10.17182/hepdata.28179

Data are presented which firmly establish the existence of the double charge exchange reaction p p → Σ − Σ − at 3.6 GeV/ c . The forward cross section was found to be (5.9 ± 1.1) μb and the ratio of the “forbidden” to “allowed” forward cross section is R = σ( Σ − Σ − σ( Σ + Σ + ) = 0.09 ± 0.02 .

2 data tables

No description provided.

No description provided.


Observation of multihadronic events in e+ e- collisions at the energy of 1.18-1.34 gev

Kurdadze, L.M. ; Onuchin, A.P. ; Serednyakov, S.I. ; et al.
Phys.Lett.B 42 (1972) 515-518, 1972.
Inspire Record 84975 DOI 10.17182/hepdata.28190

Using the electron-positron storage ring VEPP-2 multipionic events have been observed at a total energy of 1.18–1.34 GeV. The experimental cross-section appears to be considerably larger than calculated within the framework of the vector dominance model for the processes e + e − → ϱπ , ϱϵ , ωπ , A 1 π . The data on the total cross-section obtained in the framework of the statistical model with 4 pions are presented.

1 data table

DATA VALUES MEASURED OFF GRAPH IN JOURNAL. VALUES OF R CALCULATED FROM TOTAL MULTIHADRONIC CROSS SECTION.