Good, M.L.
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Investigation of the reaction pi- p ---> eta n at momenta up to 40-GeV/c

The Serpukhov-CERN collaboration Apel, W.D. ; Bertolucci, E. ; Bushnin, Yu.B. ; et al.
Sov.J.Nucl.Phys. 25 (1977) 194-197, 1977.
Inspire Record 118649 DOI 10.17182/hepdata.19079

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Polarization in p p Elastic Scattering at Small |t|

Klem, R.D. ; Courant, H.W. ; Lee, J. ; et al.
Phys.Rev.D 15 (1977) 602-603, 1977.
Inspire Record 124114 DOI 10.17182/hepdata.24547

We have measured the polarization parameter for proton-proton elastic scattering at p0 = 6 GeV/c for |t|<0.5 (GeV/c)2 using the polarized proton beam at the Argonne Zero Gradient Synchrotron. These data, together with all previous measurements in this t region, are well fitted by the empirical relation P = (0.481±0.010)(−t)12exp(2.291±0.085)t.

1 data table
Table 1

No description provided.


Phi Production in pi- p Collisions Near Threshold

Courant, H. ; Makdisi, Y.I. ; Marshak, M.L. ; et al.
Phys.Rev.D 16 (1977) 1-6, 1977.
Inspire Record 125080 DOI 10.17182/hepdata.24607

Using a secondary pion beam from the Argonne Zero Gradient Synchrotron we have studied the process π−p→φn in the region of the cross-section enhancement near kinematic threshold. For incident momenta between 1.6 and 2 GeV/c, we have determined production and decay angular distributions and extrapolated total cross sections from a sample of about 160 φ's above background. The production and decay distributions are consistent with isotropy over this entire incident-momentum range. The extrapolated total cross section varies between 19 and 25 μb.

2 data tables
Table 1

Axis error includes +- 16/16 contribution (RES-DEF(RES=PHI,BACK=CORRECTED)).

Table 2

Axis error includes +- 16/16 contribution (RES-DEF(RES=PHI,BACK=CORRECTED)).


Particle Multiplicities in K- p Interactions at 32-GeV/c

The French-Soviet & CERN-Soviet collaborations Cochet, C. ; Barloutaud, R. ; Berard, A. ; et al.
Nucl.Phys.B 124 (1977) 61-80, 1977.
Inspire Record 118795 DOI 10.17182/hepdata.35364

The inclusive cross section and the average multiplicity are evaluated for most of the charged ( π ± , p, K ± ) and neutral (γ, π 0 , K 0 , K 0 , Λ, Λ , n ) particles produced in 32 GeV/ c K − p interactions; corresponding results are obtained for each charged topology separately. New results are given for the total charged multiplicity cross sections. The average longitudinal momentum of neutrals is found to be roughly equal to that of charged particles. The π + and π − multiplicity distributions are reconstructed and compared to the π 0 and to the total charged multiplicity distributions.

6 data tables
Table 1

No description provided.

Table 2

Axis error includes +- 30/30 contribution (SYSTEMATIC ERROR FOR K0 MULTIPLICITY, WHICH IS EVALUATED FROM 2 ASSUMPTIONS: ALL K0'S COME FROM THE FINAL STATES (N K 2AK PIONS) OR (LAMBDA/SIGMA K AK PIONS) AND CHARGE DISTRIBUTION IN THESE FINAL STATES OBEYS A STATISTICAL ISOSPIN MODEL OF F.CERULUS,NC 19, 528. ALSO ASSUMED THAT SIG(K+)=SIG(KO). VALUES OF SIG(XI-) AND RATIOS SIG(SIGMA+)/SIG(LAMBDA), SIG(SIGMA-)/SIG(LAMBDA) ARE TAKEN FROM 14.3 GEV EXPERIMENT LOUEDEC 76,NC 41A, 166, STATISTICAL ERRORS BEING DOUBLED. FOR ALL ANTIBARYONS ASSUMED THAT SIG(ANTIBARYON)/SIG(BARYON)=SIG(ANTILAMBDA)/SIG(LAMBDA) =0.046+-0.020. SLOW PROTONS WITH PLAB < 1.2 GEV/C ARE IDENTIFIED, AN ESTIMATE FOR FAST PROTON PRODUCTION IS TAKEN FROM FACCINI 77,NP B127, 109).

Table 3

Axis error includes +- 30/30 contribution (SYSTEMATIC ERROR FOR K0 MULTIPLICITY, WHICH IS EVALUATED FROM 2 ASSUMPTIONS: ALL K0'S COME FROM THE FINAL STATES (N K 2AK PIONS) OR (LAMBDA/SIGMA K AK PIONS) AND CHARGE DISTRIBUTION IN THESE FINAL STATES OBEYS A STATISTICAL ISOSPIN MODEL OF F.CERULUS,NC 19, 528. ALSO ASSUMED THAT SIG(K+)=SIG(KO). VALUES OF SIG(XI-) AND RATIOS SIG(SIGMA+)/SIG(LAMBDA), SIG(SIGMA-)/SIG(LAMBDA) ARE TAKEN FROM 14.3 GEV EXPERIMENT LOUEDEC 76,NC 41A, 166, STATISTICAL ERRORS BEING DOUBLED. FOR ALL ANTIBARYONS ASSUMED THAT SIG(ANTIBARYON)/SIG(BARYON)=SIG(ANTILAMBDA)/SIG(LAMBDA) =0.046+-0.020. SLOW PROTONS WITH PLAB < 1.2 GEV/C ARE IDENTIFIED, AN ESTIMATE FOR FAST PROTON PRODUCTION IS TAKEN FROM FACCINI 77,NP B127, 109).

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Observation of a Spin 4 Neutral H Meson with 2-GeV Mass

Apel, W.D. ; Augenstein, K. ; Bertolucci, E. ; et al.
Yad.Fiz. 23 (1976) 333-340, 1976.
Inspire Record 113106 DOI 10.17182/hepdata.19080

None

1 data table
Table 1

No description provided.


Precision Measurement of n p Charge Exchange Cross-Section at 647-MeV

Evans, M.L. ; Glass, G. ; Hiebert, J.C. ; et al.
Phys.Rev.Lett. 36 (1976) 497-500, 1976.
Inspire Record 112959 DOI 10.17182/hepdata.21088

The differential cross section for n−p elastic scattering in the angular region 145°<θc.m.<180° has been measured with high statistical accuracy using the monoenergetic neutron beam at Clinton P. Anderson Meson Physics Facility. The results differ significantly from previous Dubna and Princeton-Pennsylvania Accelerator results but agree reasonably well with recent Saclay data except at extreme backward angles.

1 data table
Table 1

No description provided.


Inclusive pi- and gamma Production in 24-GeV/c p p Collisions

Beier, E.W. ; Raychaudhuri, K. ; Takeda, H. ; et al.
Phys.Rev.Lett. 37 (1976) 1114-1116, 1976.
Inspire Record 115982 DOI 10.17182/hepdata.21087

We report the 24-GeV/c inclusive π− yield near θc.m.=90° for 0.5<~PT≲2.2 GeV/c. No high-PT excess is seen at this energy. In addition we have obtained the inclusive γ-ray yield from a measurement of low-mass e+e− pairs. This yield is compared with that expected from π0-, η-, and ω-meson decay, to provide limits on possible direct photon production.

1 data table
Table 1

No description provided.


Measurement of $\psi$ (3.1) Meson Production by Pions and Protons

Blanar, G.J. ; Boyer, C.F. ; Faissler, W.L. ; et al.
Phys.Rev.Lett. 35 (1975) 346, 1975.
Inspire Record 98776 DOI 10.17182/hepdata.21147

The production of ψ(3.1) mesons is reported for the reactions π−+Fe→μ++μ−+anything, at 200 GeV, and p+Fe→μ++μ−+anything, at 240 GeV. For ψ production, distributions in x≡PLPbeam and P⊥ are given. For x>~0.5, the ratio of the ψ production cross sections in iron for pions to that for protons is found to be 7.4±2.0.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

CDB=THESE DATA TO BE MULTIPLIED BY FACTOR 10.0.

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Observation of a Spin 4 Neutral Meson with 2-GeV Mass Decaying in pi0 pi0

The Serpukhov-CERN collaboration Apel, W.D. ; Augenstein, K. ; Bertolucci, E. ; et al.
Phys.Lett.B 57 (1975) 398, 1975.
Inspire Record 99595 DOI 10.17182/hepdata.27849

The invariant mass spectrum of neutral meson states from π − p interactions at 40 GeV/ c incident momentum has been investigated in a high statistics experiment performed at the 70 GeV IHEP accelerator. To detect the high energy photons coming from the produced neutral states, a hodoscope spectrometer with a computer on-line was used. A clear structure on the mass spectrum of dipions produced in the reaction π − p→π°π°n is observed at 2 GeV. The decay angular distributions show in this mass region the variation with mass typical of a state with a spin J = 4. The mass of the observed meson is found to be M = (2020±30)MeV and the estimate of the full width is (180±60) MeV.

1 data table
Table 1

No description provided.


Anti-Proton-Proton Charge-Exchange Between 1-GeV/c and 3-GeV/c

Cutts, D. ; Good, M.L. ; Grannis, P.D. ; et al.
Phys.Rev.D 17 (1978) 16, 1978.
Inspire Record 728 DOI 10.17182/hepdata.24451

We have measured the reaction cross section for p¯p→n¯n in small momentum steps between 0.97 and 3.13 Gev/c to a high level of statistical accuracy. Structures are observed in the vicinity of Plab=1.25 GeVc and 1.8 GeVc which are consistent with the structure observed in the p¯p total cross section.

1 data table
Table 1

No description provided.