Piilonen, L.
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rivet Analysis
Observation of a Resonance at 4.4-GeV and Additional Structure Near 4.1-GeV in e+ e- Annihilation

Siegrist, J. ; Abrams, G.S. ; Boyarski, A. ; et al.
Phys.Rev.Lett. 36 (1976) 700, 1976.
Inspire Record 108144 DOI 10.17182/hepdata.21093

We observe a resonancelike structure in the total cross section for hadron production by e+e− colliding beams at a mass of 4414 ± 7 MeV having a total width Γ=33±10 MeV. From the area under this resonance, we deduce the partial width to electron pairs to be Γee=440±140 eV. Further structure of comparable width is present near 4.1 GeV.

1 data table
Table 1

No description provided.


Tests of Factorization from Single and Double Pion Production in 100-GeV/c anti-p p and p p Collisions.

Rushbrooke, John G. ; Ward, D.R. ; Ansorge, R.E. ; et al.
Phys.Rev.Lett. 39 (1977) 117-120, 1977.
Inspire Record 123282 DOI 10.17182/hepdata.20980

Single- and double-pion inclusive spectra are presented for 100-GeV/c p¯p interactions and compared with related pp data. Double-fragmentation distributions are shown to be understood within a Mueller-Regge framework as a product of single-fragmentation distributions. Consideration of pp and p¯p−pp distributions shows factorization to hold in Pomeron and in Reggeon exchanges independently.

1 data table
Table 1

No description provided.


Properties of Inclusive pi+- Production in 100-GeV/c anti-Proton-Proton Interactions

Whitmore, J. ; Oh, B.Y. ; Pratap, M. ; et al.
Phys.Rev.Lett. 38 (1977) 996, 1977.
Inspire Record 118838 DOI 10.17182/hepdata.20985

Inclusive spectra are presented for π± production in 100-GeV/cp¯p interactions. The rapidity distribution for the difference (p¯p−pp) approximately scales as the difference in total cross sections in the fragmentation region between 12 and 100 GeV/c and exhibits an approximate s−12dependence in the central region.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Study of the Reaction d (p, pi+) t at t(p) = 410-MeV, 605-MeV and 809-MeV

Aslanides, E. ; Bertini, R. ; Bing, O. ; et al.
Phys.Rev.Lett. 39 (1977) 1654-1656, 1977.
Inspire Record 126515 DOI 10.17182/hepdata.20981

Pion production on a CD2 target has been measured using the high-resolution magnetic spectrometer SPES I. Differential cross sections for the reaction D(p, π+)T have been determed at Tp=410, 605, and 809 MeV. The present data, together with previous results establish a complete angular distribution of the reaction D(p, π+)T at ∼ 600 MeV and the energy dependence of the differential cross section for this reaction at several constant momentum transfers.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of Medium-Energy alpha-Proton Elastic Scattering Beyond the First Minimum Region

Berger, J. ; Duflo, J. ; Goldzahl, L. ; et al.
Phys.Rev.Lett. 37 (1976) 1195-1198, 1976.
Inspire Record 116144 DOI 10.17182/hepdata.21086

The α-proton elastic scattering has been measured with α particles at equivalent incident proton energies of 438, 648, and 1036 MeV. A structure is observed at the position where a second minimum is expected in the differential cross section. Comparison with improved versions of the Glauber model are presented.

3 data tables
Table 1

X ERROR D(THETA) = 0.4400 DEG.

Table 2

X ERROR D(THETA) = 0.2200 DEG.

Table 3

X ERROR D(THETA) = 0.4400 DEG.


Energy Dependence of the Pseudorapidity Distributions in Proton-Nucleus Collisions Between 50-GeV/c and 200-GeV/c.

Halliwell, C. ; Elias, J.E. ; Busza, W. ; et al.
Phys.Rev.Lett. 39 (1977) 1499-1502, 1977.
Inspire Record 123287 DOI 10.17182/hepdata.21004

Pseudorapidity distributions for proton-nucleus interactions are presented. The data cover twelve nuclei ranging from carbon to uranium and three incident proton momenta, 50, 100, and 200 GeV/c.

1 data table
Table 1

Three-dimensional avegage multiplicity distribution is parametrized to CONST(C=F)+CONST(C=G)*COL+CONST(C=H)*COL, where COL = A(N=NUCLEUS)*SIG(Q=P P)/SIG(Q=P NUCLEUS).


Excitation of High-Energy Protons Into Low Mass States in p d Interactions

Akimov, Y. ; Golovanov, L. ; Mukhin, S. ; et al.
Phys.Rev.Lett. 35 (1975) 763, 1975.
Inspire Record 99830 DOI 10.17182/hepdata.21129

We have measured p−d inelastic scattering at small momentum transfer by detecting the slow-recoil deuterons from a deuterium-gas-jet target. The coherent diffraction dissociation of protons on deuterons was studied in the region 0.03<|t|<0.07 (GeV/c)2, 1.4<MX2<4 GeV2, and for energies from 50 to 275 GeV. In this region, the diffractive cross section exhibits structure and is dominated by an enhancement at MX2∼1.9 GeV2.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Diffraction Dissociation of High-Energy Protons in p d Interactions

Akimov, Y. ; Golovanov, L. ; Mukhin, S. ; et al.
Phys.Rev.Lett. 35 (1975) 766, 1975.
Inspire Record 99831 DOI 10.17182/hepdata.21128

We report results from a measurement of the inclusive process p+d→X+d in the region 0.03<|t|<0.12 (GeV/c)2 and 5 GeV2<MX2≲0.11plab for incident proton momenta from 150 to 400 GeV/c. We find that in this region, the differential cross section d2σdtdMX2 varies only slowly with energy, falls exponentially with |t|, and behaves to a good approximation as 1MX2. The measurement was performed at Fermilab by detecting slow-recoil deuterons from a deuterium-gas-jet target placed at the internal beam of the accelerator.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Azimuthal Asymmetry in Inclusive Hadron Production by e+ e- Annihilation

Schwitters, R. ; Boyarski, A. ; Breidenbach, Martin ; et al.
Phys.Rev.Lett. 35 (1975) 1320, 1975.
Inspire Record 100683 DOI 10.17182/hepdata.21192

We have observed an azimuthal asymmetry in inclusive hadron production by e+e− annihilation at the center-of-mass energy s=7.4 GeV. The asymmetry is caused by the polarization of the circulating beams in the storage ring and allows separate determination of the transverse and longitudinal structure functions. We find that transverse production dominates for x>0.2 where x is the scaling variable 2ps.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Muon-Deuterium Deep Inelastic Scattering

Kim, I.J. ; Entenberg, A. ; Jostlein, H. ; et al.
Phys.Rev.Lett. 33 (1974) 551, 1974.
Inspire Record 1427 DOI 10.17182/hepdata.21238

We have measured deep inelastic muon-deuteron scattering in the range 0.4<Q2<3.4 and 1.6<ν<5.6 GeV. We have extracted the neutron structure function and find that νW2n differs significantly from νW2p, as also found in e−d scattering. To compare μ−d and e−d scattering we form the ratio r(Q2)=(νW2)μd(νW2)ed=N(1+Q2Λ2)−2 and find N=0.925±0.038 and 1Λ2=−0.019±0.016.

1 data table
Table 1

No description provided.